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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description
The AAT3141 is a low noise, constant frequency charge pump DC/DC converter that uses a tri mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for White LED applications. The device produces current levels up to 30mA on each of its 4 current source outputs to drive various arrangements of LEDs from a 2.7V to 5.5V input. Outputs may be operated individually or in parallel for driving higher-current LEDs. A low external parts count (two 1F flying capacitors and two small 1F capacitors at VIN, and CP) make the AAT3141 ideally suited for small battery-powered applications. Analogic TechTM's Advanced Simple Serial ControlTM (AS2CwireTM) digital input is used to enable, disable and set the LED drive current with a 32 level logarithmic scale LED brightness control. The AAT3141 has a thermal management system to protect the device in the event of a short circuit condition at an output pin. Built-in soft-start circuitry prevents excessive inrush current during start-up. A high charge pump switching frequency enables the use of very small external capacitors. In shutdown mode, the device disconnects the load from VIN and reduces quiescent current to less than 1A. The AAT3141 is available in the very small 12 pin TSOPJW package.
AAT3141
Features
* * * * * * * * * * * * * *
ChargePumpTM
Tri Mode 1x, 1.5x, and 2x Charge Pump for Maximum Efficiency and VF coverage Drives Low-VF & High-VF Type LEDs Up to 4, 30mA Outputs AS2Cwire Independent 3+1 output addressing 32 Position Logarithmic Scale with Digital Control Low Noise Constant Frequency Operation 1MHz Switching Frequency Small Application Circuit Regulated Output Current Automatic Soft-Start VIN Range: 2.7V to 5.5V No Inductors Iq < 1A in Shutdown 12 pin TSOPJW package
Preliminary Information
Applications
* * * * White LED Backlighting White Photo-Flash for DSCs Color (RGB) Lighting Programmable Current Sources
Typical Application
VIN C1+ C1 1F CP VBATTERY C IN 1F C CP 1F C1C2+ C2 1F
AAT3141
C2D1 D2 D3 D4
EN/SET
EN/SET D4 GND D3 D2 D1
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Pin Descriptions
Pin #
1 2 3 4 5 6 7 8 9 10 11 12
AAT3141
Symbol
C2+ CP C1C1+ D3 D2 D4 D1 EN/SET IN GND C2-
Function
Flying Capacitor 2 + terminal. Connect a 1F capacitor between C2+ and C2-. Charge pump output. Requires 1F capacitor connected between this pin and ground. Flying Capacitor 1 - terminal Flying Capacitor 1 + terminal. Connect a 1F capacitor between C1+ and C1-. Current source output #3 Current source output #2 Current source output #4 Current source output #1 AS2Cwire Serial Interface Control Pin Input power supply. Requires 1F capacitor connected between this pin and ground. Ground Flying Capacitor 2 - terminal
Pin Configuration
TSOPJW-12 (Top View) C2+ CP C1C1+ D3 D2 C2GND IN EN/SET D1 D4
1 2 3 4 5 6
12 11 10 9 8 7
2
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Absolute Maximum Ratings
Symbol
VIN VEN/SET IOUT 2 TJ
AAT3141
Description
Input Voltage EN/SET to GND Voltage Maximum DC Output Current Operating Junction Temperature Range
Value
-0.3 to 6 -0.3 to VIN + 0.3 150 -40 to 150
Units
V V mA C
Notes: 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time. 2. Based on long-term current density limitation.
Thermal Information
Symbol
PD JA
Description
Maximum Power Dissipation Thermal Resistance1
1, 2
Value
625 160
Units
mW C/W
Notes: 1. Mounted on a FR4 board. 2. Derate 6.25 mW/C above 25C
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Electrical Characteristics
Symbol Description
1
AAT3141
CIN=CCP=C1=C2= 1.0F; TA= -40 - 85C unless otherwise noted. Typical values are at TA= 25C, VIN= 3.5V. Conditions Min Typ Max Units
2.7 VD1:D4 = 2.0V, CP = 1X No Load Current, CP = 1.5X VIN = 3.5V, EN/SET=0 VIN = 3.5V, TA = 25C VD1:D4 = 3.6V, VIN = 3.5V VIN = 3.5V, IOUT(TOTAL) = 120mA, Measured from IN to CP 550 3 -10 -3 0.5 93 5.5 5 1 10 3 V A mA A % % % Input Power Supply VIN Operation Range Icc ISHDN IDX I(D-Match) CP Operating Current Shutdown Current Output Current Accuracy 2 Current Matching 3 Charge Pump Section Efficiency
Charge Pump Section TSS Soft start time FCLK Clock Frequency EN/SET VEN(L) Enable Threshold Low VEN(H) Enable Threshold High TEN/SET LO EN/SET low time TEN/SET HI MIN Minimum EN/SET high time TEN/SET HI MAX Maximum EN/SET high time TOFF EN/SET Off Timeout TLAT EN/SET Latch Timeout IEN/SET EN/SET input leakage
50 1 VIN = 2.7V VIN = 5.5V 0.4 1.4 0.3 50 75 500 500 1 75
s MHz V V s ns s s s A
VEN/SET = 5.5V, VIN = 5.5V
-1
Notes: 1. The AAT3141 is guaranteed to meet performance specification over the -40C to 85C operating temperature range and are assured by design, characterization and correlation with statistical process controls. 2. Codes 2-7 are guaranteed to be within +/-15% of stated current level. 3. Current matching is defined as I(D-Match) = (ID - IAVE)/IAVE
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics
(Unless otherwise noted, VIN = 3.5V, CIN = CCP = C1 = C2 = 1F, TA = 25C) Efficiency vs. VIN
(Code 26)
100 90 100 90
AAT3141
Efficiency vs. VIN
D1=3.5V, D2=3.3V, D3=3.2V, D4=3.0V
Efficiency (%)
Efficiency (%)
80 70 60 50 40 30 2.9 3.0 3.1
3.0VF
Code 26
80 70 60 50 40 30
3.5VF
Code 28
Code 32
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
VIN (V)
VIN (V)
Efficiency vs. VIN
D1-D2=3.5V, D3-D4=3.2V
100 90
Code 26
Efficiency (%)
80 70 60 50 40 30 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2
Code 28
Code 32
VIN (V)
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics
(Unless otherwise noted, VIN = 3.5V, CIN = CCP = C1 = C2 = 1F, TA = 25C) Line Response (1X Mode, 4x19mA Load)
VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div) 1ms/div 1ms/div
AAT3141
Line Response (1X Mode, 4x30mA Load)
VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div)
Line Response (1.5X Mode, 4x19mA Load)
VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div) 1ms/div VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div)
Line Response (1.5X Mode, 4x30mA Load)
1ms/div
Load Characteristics (1.5X Mode, 4x15mA Load)
VF (20mV/div) IIN (10mA/div) VCP (20mV/div) VF (20mV/div) IIN (10mA/div) VCP (20mV/div)
Load Characteristics (1.5X Mode, 4x30mA Load)
1s/div
1s/div
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics
(Unless otherwise noted, VIN = 3.5V, CIN = CCP = C1 = C2 = 1F, TA = 25C) Charge Pump to Load Switch (1.5X Mode, 4x19mA Load)
VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div) VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div)
AAT3141
Charge Pump to Load Switch (1.5X Mode, 4x30mA Load)
5ms/div
5ms/div
Charge Pump to Load Switch (2X Mode, 4x19mA Load)
VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div) VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div)
Charge Pump to Load Switch (2X Mode, 4x30mA Load)
5ms/div
5ms/div
Load Switch to Charge Pump (1.5X Mode, 4x19mA Load)
VIN (1V/div) VCP (4V/div) VDIODE (500mV/div) IIN (50mA/div) VIN (1V/div) VCP (4V/div) VDIODE (500mV/div) IIN (50mA/div)
Load Switch to Charge Pump (1.5X Mode, 4x30mA Load)
2ms/div
2ms/div
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics
(Unless otherwise noted, VIN = 3.5V, CIN = CCP = C1 = C2 = 1F, TA = 25C) Turn-On to 1X Mode (4x19mA Load) Turn-On to 1X Mode (4x30mA Load)
AAT3141
EN/SET (2V/div) VCP (4V/div) VDIODE (2V/div) IIN (100mA/div) 100s/div
EN/SET (2V/div) VCP (4V/div) VDIODE (2V/div) IIN (100mA/div) 100s/div
Turn-On to 1.5X Mode (4x19mA Load)
Turn-On to 1.5X Mode (4x30mA Load)
EN/SET (2V/div) VCP (4V/div) VDIODE (2V/div) IIN (100mA/div) 100s/div
EN/SET (2V/div) VCP (4V/div) VDIODE (2V/div) IIN (100mA/div) 100s/div
Turn-Off from Full Scale 2X Mode
EN/SET (2V/div) VDIODE (2V/div) IIN (200mA/div)
100s/div
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics
(Unless otherwise noted, VIN = 3.5V, CIN = CCP = C1 = C2 = 1F, TA = 25C) Input Current vs. Input Voltage
(4 x 10mA)
90 80 70 60 300
AAT3141
Input Current vs. Input Voltage
(4 x 30mA)
VDIODE = 3.4V IIN (mA)
250 200 150 100 50 0 2.7
VDIODE = 3.4V
IIN (mA)
50 40 30 20 10 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VDIODE = 3.0V
VDIODE = 3.0V
3.1 3.5 3.9 4.3 4.7 5.1 5.5
VIN (V)
VIN (V)
Diode Current vs. Input Voltage
(30mA, 15mA settings)
40 35 0.850 0.825
VIH and VIL vs. VIN
VDIODE = 3.4V
0.800 0.775 0.750
IDIODE (mA)
30 25 20
VIH VIL
0.725 0.700
VDIODE = 3.4V
15 10 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
0.675 0.650 0.625 0.600 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
VIN (V)
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Functional Block Diagram
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
AAT3141
VIN
Soft Start Control 1MHz Oscillator Voltage Reference 1x 1.5x 2x Charge Pump
C1+ C1C2+ C2-
CP
32 x 8 bit ROM
D/A D/A D/A
D1 D2 D3 D4
EN/SET
AS2Cwire Interface
32 x 8 bit ROM
D/A
GND
Functional Description
The AAT3141 is a tri mode Load Switch (1X) and high efficiency (1.5X or 2X) charge pump device intended for white LED back light applications. To maximize power conversion efficiency, an internal sensing circuit monitors the voltage required on each constant current source output and sets the load switch and charge pump modes based on the input battery voltage and the current source output voltage. As the battery discharges over time, the AAT3141 charge pump is enabled when any of the four current source outputs nears dropout. The charge pump initially starts in 1.5X mode. If the charge pump output droops enough for any current source output to become close to dropout, the charge pump will automatically transition to 2X mode. Each of the four current source outputs is
independently switched between the battery input (1X) or the charge pump output (1.5X or 2X) depending on the voltage at the current source output. Since the LED to LED VF can vary as much as 1 volt, this function significantly enhances overall device efficiency when the battery input voltage level is greater than the voltage required at any current source output. The AAT3141 requires only four external components: two 1F ceramic capacitors for the charge pump flying capacitors (C1 and C2), one 1F ceramic input capacitor (CIN) and one 0.33F to 1F ceramic charge pump output capacitor (CCP). The four constant current outputs (D1 to D4) drive four individual LEDs with a maximum current of 30mA each. The EN/SET AS2Cwire serial interface enables the AAT3141, and sets the current source magnitudes.
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Applications Information
Constant Current Output Level Settings
The constant current source amplitudes for D1 to D4 are set via the serial interface according to a logarithmic scale where each code is 1dB greater than the previous code. In this manner, LED brightness appears linear with each increasing code count. Because the outputs D1 to D4 are true independent constant current sources, the voltage observed on any single given output will be determined by the actual forward voltage (VF) for the LED being driven. Since the output current of the AAT3141 is programmable, no PWM (pulse width modulation) or additional control circuitry is needed to control LED brightness. This feature greatly reduces the burden on a microcontroller or system IC to manage LED or display brightness, allowing the user to "set it, and forget it." With its high speed serial interface (1MHz data rate), the output current of the AAT3141 can be changed successively to brighten or dim LEDs, in smooth transitions (e.g. to fade-out) or in abrupt steps, giving the user complete programmability and real time control of LED brightness. The individual current level settings are each approximately 1dB apart for settings above code 8 (see Current Level Settings below). The current level settings below code 8 are more than 1dB apart and serve the needs for transmissive displays and other low-current applications.
AAT3141
Normalized Current Level Settings
1.00
Current (mA)
0.10
0.01
0.00 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Code
Constant Current Source Output Nominal Programming Levels (mA):
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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IOUT (typ) (mA)
0.0 0.1 0.2 0.4 0.5 0.7 1.1 1.8 2.0 2.2 2.5 2.8 3.2 3.5 4.0 4.5
Code
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
IOUT (typ) (mA)
5.1 5.6 6 7 8 9 10 12 13 15 17 19 21 24 27 30
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
AS2CwireTM Serial Interface
The current source output magnitude is controlled by the Advanced Simple Serial Control (AS2Cwire) serial digital input. AS2Cwire adds addressing capability for multiple data registers over the Simple Serial ControlTM (S2CwireTM), which is only capable of controlling a single register. The AAT3141 has two registers. One contains the current level setting for outputs D1-D3, and the other contains the current level setting for output D4. Three addresses are used to control the two registers. Address 0 addresses both registers simultaneously to allow the loading of both registers with the same data using a single write protocol. Address 1 addresses register 1 for D1-D3 current level settings. Address 2 addresses register 2 for D4 current level settings. As with S2Cwire, AS2Cwire relies on the number of rising edges of the EN/SET pin to address and load the registers. AS2Cwire latches data or address after the EN/SET pin has been held high for time TLAT. Address or data is differentiated by the number of EN/SET rising edges. Since the data registers are 5 bits each, the differentiating number of pulses is 25 or 32, so that address 0 is signified by 33 rising edges, address 1 by 34 rising edges and address 2 by 35 rising edges. Data is set to any number of rising edges between 1 and including 32. A typical write protocol is a burst of EN/SET rising edges, signifying a particular address, followed by a pause with EN/SET held high for the TLAT timeout period, a burst of rising edges signifying data, and a TLAT timeout for the data registers. Once an address is set, then multiple writes to the corresponding data register are allowed. Address 0 is the default address on the first rising edge after the AAT3141 has been disabled. If data is presented on the first rising edge with no prior address, both data registers are simultaneously loaded. When EN/SET is held low for an amount of time greater than TOFF, the AAT3141 enters into shutdown mode and draws less than 1A from VIN. Data and Address registers are reset to 0 during shutdown.
AAT3141
AS2Cwire Serial Interface Addressing
Address
0 1 2
EN/SET Rising Edges
33 34 35
Data Register
1 & 2: D1-D4 1: D1-D3 2: D4
AS2Cwire Serial Interface Timing
Address
THI TLO TLAT TLAT
Data
EN/SET
1 2 33 34 1 2... n <= 32
Address
0
1
Data Reg 1
0
n
Data Reg 2
0
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
LED Selection
The AAT3141 is specifically intended for driving white LEDs. However, the device design will allow the AAT3141 to drive most types of LEDs with forward voltage specifications ranging from 2.0V to 4.3V. LED applications may include main and subLCD display backlighting, camera photo-flash applications, color (RGB) LEDs, infrared (IR) diodes for remotes, and other loads benefiting from a controlled output-current generated from a varying input-voltage. Since the D1 to D4 output current sources are matched with negligible voltage dependence, the LED brightness will be matched regardless of the specific LED forward voltage (VF) levels. In some instances (e.g. in high-luminous-output applications such as photo-flash) it may be necessary to drive high-VF type LEDs. The low-dropout current-sources in the AAT3141 make it capable of driving LEDs with forward voltages as high as 4.3V at full current from an input supply as low as 3.0V. Outputs can be paralleled to drive high current LEDs without complication. Since the AAT3141 outputs are pure constant current sources and typically drive individual loads, it is difficult to measure the output voltage for a given output (D1 to D4) to derive an overall output power measurement. For any given application, white LED forward voltage levels can differ, yet the output drive current will be maintained as a constant. This makes quantifying output power a difficult task when taken in the context of comparing to other white LED driver circuit topologies. A better way to quantify total device efficiency is to observe the total input power to the device for a given LED current drive level. The best White LED driver for a given application should be based on trade-offs of size, external component count, reliability, operating range and total energy usage...Not just "% efficiency". The AAT3141 efficiency may be quantified under very specific conditions and is dependant upon the input voltage versus the output voltage seen across the loads applied to outputs D1 through D4 for a given constant current setting. Depending upon the case of VIN being greater than the specific voltage seen across the load on D1 (or D5 when the AAT3141 is used) the device will operate in "Load Switch" mode. If the voltage seen on the constant current source output is less than VIN then the device will operate in 1.5X or 2X charge pump mode. Each of these modes will yield different efficiency values. One should refer to the following two sections for explanations for each operational mode.
AAT3141
Device Switching Noise Performance
The AAT3141 operates at a fixed frequency of approximately 1MHz to control noise and limit harmonics that can interfere with the RF operation of cellular telephone handsets or other communication devices. Back-injected noise appearing on the input pin of the Charge Pump is 20mV peak-topeak, typically ten times less than inductor-based DC/DC boost converter white LED backlight solutions. The AAT3141 soft-start feature prevents noise transient effects associated with in-rush currents during the start up of the charge pump circuit.
Load Switch Mode Efficiency
The AAT3141 load switch mode is operational at all times and functions alone to enhance device power conversion efficiency when the condition exists where VIN is greater then voltage across the load connected to the constant current source outputs. When in "Load Switch" mode, the voltage conversion efficiency is defined as output power divided by input power: POUT PIN
Power Efficiency and Device Evaluation
The charge pump efficiency discussion in the following sections only account for the efficiency of the charge pump section itself. Due to the unique circuit architecture and design of the AAT3141, it is very difficult to measure efficiency in terms of a percent value comparing input power over output power.
=
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
The expression to define the ideal efficiency () can be rewritten as: POUT VOUT x IOUT VOUT = = PIN VIN x IOUT VIN es VOUT. Refer to the Typical Characteristics section for measured plots of efficiency versus input voltage and output load current for the given charge pump output voltage options.
AAT3141
= -or-
Capacitor Selection
Careful selection of the four external capacitors CIN, C1, C2, COUT is important because they will affect turn on time, output ripple and transient performance. Optimum performance will be obtained when low ESR (<100m) ceramic capacitors are used. In general, low ESR may be defined as less than 100m. A capacitor value of 1F for all four capacitors is a good starting point when choosing capacitors. If the LED current sources are only programmed for light current levels, then the capacitor size may be decreased.
(%) = 100
VOUT VIN
Charge Pump Section Efficiency
The AAT3141 contains a fractional charge pump which will boost the input supply voltage in the event where VIN is less then the voltage required on the constant current source outputs. The efficiency () can be simply defined as a linear voltage regulator with an effective output voltage that is equal to one and a half or two times the input voltage. Efficiency () for an ideal 1.5x charge pump can typically be expressed as the output power divided by the input power. POUT PIN
Capacitor Characteristics
Ceramic composition capacitors are highly recommended over all other types of capacitors for use with the AAT3141. Ceramic capacitors offer many advantages over their tantalum and aluminum electrolytic counterparts. A ceramic capacitor typically has very low ESR, is lowest cost, has a smaller PCB footprint and is non-polarized. Low ESR ceramic capacitors help maximize charge pump transient response. Since ceramic capacitors are non-polarized, they are not prone to incorrect connection damage.
=
In addition, with an ideal 1.5x charge pump, the output current may be expressed as 2/3 of the input current. The expression to define the ideal efficiency () can be rewritten as: POUT VOUT x IOUT VOUT = = PIN VIN x 1.5IOUT 1.5VIN VOUT 1.5VIN
Equivalent Series Resistance (ESR)
ESR is an important characteristic to consider when selecting a capacitor. ESR is a resistance internal to a capacitor, which is caused by the leads, internal connections, size or area, material composition and ambient temperature. Capacitor ESR is typically measured in milliohms for ceramic capacitors and can range to more than several ohms for tantalum or aluminum electrolytic capacitors.
=
(%) = 100
For a charge pump with an output of 5 volts and a nominal input of 3.5 volts, the theoretical efficiency is 95%. Due to internal switching losses and IC quiescent current consumption, the actual efficiency can be measured at 93%. These figures are in close agreement for output load conditions from 1mA to 100mA. Efficiency will decrease as load current drops below 0.05mA or when level of VIN approach14
Ceramic Capacitor Materials
Ceramic capacitors less than 0.1F are typically made from NPO or COG materials. NPO and COG materials typically have tight tolerance and are stable over temperature. Large capacitor values are typically composed of X7R, X5R, Z5U or Y5V dielectric materials. Large ceramic capacitors, typically greater than 2.2F are often available in low
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
cost Y5V and Z5U dielectrics, but capacitors greater than 1F are typically not required for AAT3141 applications. Capacitor area is another contributor to ESR. Capacitors that are physically large will have a lower ESR when compared to an equivalent material smaller capacitor. These larger devices can improve circuit transient response when compared to an equal value capacitor in a smaller package size. rises above the thermal limit as is the case during a short circuit of the CP pin.
AAT3141
Charge Pump Compatibility
The 4-output AAT3141 is pin-compatible with the AAT3123, AAT3132, and AAT3113 in TSOPJW-12 packages. The AAT3141 offers an improved overall efficiency, wider operating range, and the ability to drive high-VF type LEDs at full current. The AAT3141 is well suited for battery powered applications using single-cell lithium-ion (Li-Ion) batteries (4.2V to 2.8V), lithium polymer batteries, and 3-series connected dry cells (3.6V).
Thermal Protection
The AAT3141 has a thermal protection circuit that will shut down the charge pump if the die temperature
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Ordering Information
Package TSOPJW-12 Marking1 LYXYY Part Number (Tape and Reel) AAT3141ITP-T1
AAT3141
Note 1: XYY = assembly and date code.
Package Information
TSOPJW-12
0.10 0.20 + 0.05 -
2.40 0.10
0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC
2.85 0.20
7 NOM 3.00 0.10
0.9625 0.0375 + 0.10 1.00 - 0.065
0.04 REF
0.055 0.045
4 4
0.010
0.15 0.05
0.45 0.15 2.75 0.25
All dimensions in millimeters.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech's standard warranty. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 16
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