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| AME, Inc. AME8831 n General Description The AME8831 family of positive, linear regulators feature low quiescent current (17A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-25 package is attractive for " Pocket" and " Hand Held" applications. These rugged devices have both Thermal Shutdown, and Current limitation to prevent device failure under the " Worst" of operating conditions. In applications requires a low noise regulated supply. The AME8831 family uses the SR pin to program the output voltage' s slew rate to control the in-rush current. This is specifically used in the USB application where large load capacitance is present at start-up. The AME8831 also features a logic-enabled sleep mode to shutdown the regulator, reducing quiescent current to 1A typical at TA= 25oC. The AME8831 is stable with an output capacitance of 4.7F or larger. 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n Applications l Instrumentation l Portable Electronics l Wireless Devices l Cordless Phones l PC Peripherals l Battery Powered Widgets l Electronic Scales n Function Block Diagram VOUT VIN * EN or EN 10 k AMP Vref GND R2 SR Current Limit / Thermal Protection R1 * AME8831A: EN, AME8831B: EN n Features l Guaranteed 150mA Output l Dropout Voltage Typically 150 mV at 150 mA l 17A Quiescent Current l Over-Temperature Shutdown l Over-Current Limitation l Noise Reduction Bypass Capacitor l Power-Saving Shutdown Mode l Space-Saving SOT-25 Package l Factory Pre-set Output Voltages l Enable pin option l EN active low enable l EN active high enable l All AME's Lead Free Products Meet RoHS Standards n Typical Application V IN 1F VIN SR AME8831A EN GND VOUT 0.01F + 4.7F VIN VIN SR VIN 1F AME8831B EN GND VOUT 0.01F + 4.7F 1 AME, Inc. AME8831 n Pin Configuration SOT-25 Top View 5 4 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application SOT-25 Top View AME8831A 1. VIN 2. GND 5 4 AME8831B 1. VIN 2. GND AME8831 3. EN 4. SR 5. VOUT AME8831 3. EN 4. SR 5. VOUT 1 2 3 * Die Attach: Conductive Epoxy 1 2 3 * Die Attach: Conductive Epoxy n Pin Description Pin Number 1 2 3 4 5 Pin Name VIN GND EN, EN SR VOUT Pin Description The VIN terminal is the input to the device. Regulator ground. EN active low enable, EN active high enable. The SR terminal is used to control the in-rush current. The VOUT terminal is the regulated output of the device. 2 AME, Inc. AME8831 n Ordering Information 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8831 x x x x xxx x Special Feature Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Operating Ambient Number Temperature Package Type of Range Pins E: -40OC to +85OC E: SOT-2X V: 5 Pin Configuration Voltage Special Feature A: 1. VIN 2. GND 3. EN 4. SR 5. VOUT B: 1. VIN 2. GND 3. EN 4. SR 5. VOUT 330: V=3.3V Y: Lead free & Low profile Z: Lead free n Ordering Information Part Number AME8831AEEV330Z AME8831AEEV330Y Marking* BDVww BDVww Output Voltage 3.3V 3.3V Package SOT-25 TSOT-25 Operating Ambient Temperature Range - 40oC to + 85oC - 40oC to + 85oC Note: ww represents the date code and pls refer to the Date Code Rule befor Package Dimension. * A line on top of the first character represents lead free plating such as BDVww. Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability. 3 AME, Inc. AME8831 n Absolute Maximum Ratings Parameter Input Voltage Output Current Output Voltage ESD Classification 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Maximum 6 PD / (V IN - VOUT) GND-0.3 to VIN +0.3 C* Unit V mA V Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device HBM C: 4000V+ n Recommended Operating Conditions Parameter Ambient Temperature Range Junction Temperature Range Storage Temperature Range Symbol TA TJ TSTG Rating - 40 to +85 - 40 to +125 -65 to +150 Unit o C n Thermal Information Parameter Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internl Power Dissipation Maximum Junction Temperature Solder Iron (10 Sec)** SOT-25 Conductive Epoxy Package Die Attach Symbol JC JA PD Maximum 81 Unit o C/W 260 400 150 350 mW o C C o * Measure JC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F 4 AME, Inc. AME8831 n Electrical Specifications (contd.) 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application EN=0, TJ = -40 to +125oC, VIN = VOUT(typ) +1V, IOUT = 1mA, COUT = 4.7F, C(SR) = 0.01F (unless otherwise noted) Parameter Input Voltage Symbol VIN Test Condition (See Note1) TJ = 25oC Output Voltage VOUT 10A < IOUT < 150mA 3.8V < V IN < 5.5V Output Current Output Current Limit Quiescent Current Line Regulation (See Note 3) Load Regulation (See Note 4) Dropout Voltage Over Temerature Shutdown Over Temerature Hysterisis VOUT Temperature Coefficient Power Supply Ripple Rejection IOUT ILIM IQ TJ = -40 oC to +125oC 3.201 0 200 TJ = 25 C TJ = -40 oC to +125oC TJ = 25oC TJ= -40 oC to +125oC TJ = 25oC TJ = 25oC TJ = -40 C to +125 C 150 20 30 f = 1 kHz, IOUT = 150mA PSRR COUT =10F, C(SR) = 0.01F TJ = 25oC 65 d o o o Min 3.5 Typ Max 5.5 Units V 3.3 3.399 150 350 17 30 -0.2 -0.3 0.1 0.2 0.3 750 V (See Note2) VOUT = 0V 10A < IOUT < 150mA 10A < IOUT < 150mA 4.3V REGLINE %/V REGLOAD 1mA <= IOUT <= 150mA -0.02 0.0025 0.02 %/mA 150 300 VDO OTS OTH TC VOUT = VOUT(NOM) -2.0% mV o C ppm Note1 : VIN(min) = VOUT(min) + VDO (max load) Note2 : Continuous output current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time. Note3: Line Reg: Vout x100% Vin Vout Vout x100% Vout I 5 Note4: Load Reg: AME, Inc. AME8831 n Electrical Specifications Parameter Symbol 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Test Condition BW=200Hz to 100kHz IOUT = 150mA COUT = 10F C(SR) =0 .47F Min Typ Max Units Output Voltage Noise eN TJ = 25oC 100 VRMS EN, EN Input Threshold EN, EN Input Bias Current Shutdown Current VEH VEL IEN , IEN ISD R LOAD = 22 C OUT= 10F 2.0 VIN = 3.5V to 5.5V EN = VIN , EN = 0, VIN = 3.5V to 5.5V EN = 0, EN = VIN C(SR)= 0.01F o VIN 0.4 1 1 20 2 V A A 0 Turn_on Time t ON C(SR) = 0.1F C(SR) = 0.22F TJ = 25 C 200 450 ms 6 AME, Inc. AME8831 n Detail Description The AME8831 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown function. The P-channel pass transistor receives data from the error amplifier, over-current limit, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds 150oC, or the current exceeds about 350mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8831 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n External Capacitors The AME8831 is stable with an output capacitor to ground of 2.2F or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1F ceramic capacitor with a 10F Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should be at least 0.1F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A " Quiet" ground termination is desirable. This can be achieved with a " Star" connection n Enable The Enable pin is optional. EN for active high enable, EN for active low enable. When disable the Enable Pin EN=0, EN=VIN, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the standby current is less than 1A. 7 AME, Inc. AME8831 Output Voltage vs Load Current 3.26 3.25 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Output Noise Spectral Density 10 V IN=4.3V T J=25J Noise (V/ O Hz) Output Voltage (V) 3.24 3.23 VIN=4.3V COUT=4.7F C(SR)=0.47F IO =150mA 1 IO=1mA 3.22 3.21 3.2 3.19 0 15 30 45 60 75 90 105 120 135 150 0.1 100 1000 10000 100000 Load Current (mA) Frequency (Hz) Quiescent Current vs Free Air Temp. 30 2.0 1.8 Output Impedance vs Frequency VIN =4.3V C O=4.7 F Quiescent Current (uA) 25 1.6 Output Impedance 20 IO=150mA 15 IO=1mA 1.4 1.2 1.0 0.8 0.6 0.4 0.2 IO=150mA 1000 10000 100000 1000000 IO =50mA 10 5 0 -40 -20 -5 25 55 85 125 0 100 Temperature (o C) Frequency (Hz) Dropout Voltage vs. Temperature 300 120 Ripple Rejection vs Frequency V IN =4.3V V OUT=3.3V COUT =10F C(SR)=0.47F VIN=4.3V 250 100 Dropout Voltage (mV) Ripple Rejection (dB) IO=1mA 80 200 IO=150mA 150 60 100 40 I O=150mA 50 20 0 -40 -20 25 85 125 0 100 1000 10000 100000 1000000 Temperature (o C) Frequency (Hz) 8 AME, Inc. AME8831 Line Transient Response 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application VOUT vs Temperature 3.28 Input Voltage (V) IOUT=1mA 5.3 4.3 3.26 VOUT (V) 3.24 IOUT=150mA Output Voltage (mV) 3.22 3.20 VIN=4.3V Time (20S/Div) 3.18 -40 -20 25 55 85 125 Temperature (oC) Output Voltage, Enable Voltage vs Time (Start-Up) Enable Voltage (V) 5 0 Output Voltage, Enable Voltage vs Time (Start-Up) Enable Voltage (V) 5 0 C (SR) =0.01F 3 C (SR)=0.1 F 2 1 0 V IN =4.3V V OUT=3.3V IO =150mA C O=10F TJ =25 oC Output Voltage (V) 2 1 0 V IN =4.3V V OUT=3.3V IO=150mA C (SR)=0.22F CO =10F TJ =25oC Time (10mS/Div) Output Voltage (V) 3 Time (10mS/Div) Load Transient Response Output Current (mA) Output Voltage (mV) 200 100 0 0 -50 VIN =4.3V VOUT =3.3V C O=10 F TJ=25oC Time (20S/Div) 9 AME, Inc. AME8831 n Date Code Rule Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n Tape and Reel Dimension SOT-25 P W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package SOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm 10 AME, Inc. AME8831 n Tape and Reel Dimension TSOT-25 P 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package TSOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm 11 AME, Inc. AME8831 n Package Dimension SOT-25 Top View D L Side View 150mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application SYMBOLS A A1 b D E e H L 1 A MILLIMETERS MIN MAX INCHES MIN MAX 1.20REF 0.00 0.30 2.70 1.40 0.15 0.55 3.10 1.80 0.0472REF 0.0000 0.0118 0.1063 0.0551 0.0059 0.0217 0.1220 0.0709 H E S1 e c1 1.90 BSC 2.60 3.00 0.07480 BSC 0.10236 0.11811 0.0146BSC o 0.37BSC 0 o Front View 10 0 o 10 o S1 0.95BSC 0.0374BSC b TSOT-25 Top View D L Side View A1 SYMBOLS A+A1 b MILLIMETERS MIN 0.90 0.30 0.09 2.70 1.40 INCHES MIN 0.0354 0.0118 0.0035 0.1063 0.0551 MAX 1.25 0.50 0.25 3.10 1.80 MAX 0.0492 0.0197 0.0098 0.1220 0.0709 H E c D E S1 e c1 e H L 1 S1 1.90 BSC 2.40 3.00 0.07480 BSC 0.09449 0.11811 0.0138BSC o 0.35BSC 0 o Front View A 10 0o 10o 0.95BSC 0.0374BSC b 12 A1 www.ame.com.tw E-Mail: sales@ame.com.tw Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. (c) AME, Inc. , April 2006 Document: 1009-DS8831-A.01 Corporate Headquarter AME, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989 U.S.A.(Subsidiary) Analog Microelectronics, Inc. 3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489 |
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