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Advanced Monolithic Systems
FEATURES
* 2A, 0.2, internal switch * Operating voltage as low as 2.7V * 600 kHz operation frequency * Over temperature protection * 8-Lead SOIC-EDP package
AMS6101
2A SWITCH STEP-UP DC/DC CONVERTER
RoHS compliant
APPLICATIONS
* LCD TVs and LCD monitors * Battery Chargers * Portable (Notebook) Computers * Handheld Devices * Portable Applications * Consumer Electronics * GSM/CDMA Phones * Digital Cameras
GENERAL DESCRIPTION
The AMS6101 is an adjustable step-up DC/DC converter with a 2A internal switch. With the ability to set the output voltage up to 23V, the AMS6101 is an ideal part for biasing TFT displays. The AMS6101 can be operated at switching frequencies of 600 kHz allowing for easy filtering and low noise. An external compensation pin gives the user flexibility in setting frequency compensation, which makes possible the use of small, low ESR ceramic capacitors at the output. The AMS6101 is available in a low profile 8-lead SOIC EDP (thermally enhanced) package.
ORDERING INFORMATION
OUTPUT VOLTAGE Adjustable PACKAGE TYPE 8 Lead SOIC AMS6101S TEMP. RANGE -25C to 125C
PIN CONNECTIONS
8L SOIC SO Package (S)
VCC 1 PGD 2
8 EN 7 PGND 6 FB 5 COMP
TYPICAL APPLICATION
SW 3 AGND 4
Top View
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS6101
PIN DESCRIPTION
AMS6101 PIN NUMBERS 1 2 3 4 5 6 7 8 NAME VCC PWGD SW AGND COMP F/B PGND EN DESCRIPTION Analog power input. Power good output. Open collector output. A low on the pin indicates that the output is less than the desired output voltage. There is an internal rising filter on the output of the PWGD comparator. Power switch input. Internal switch connected between SW pin and GND pin. Analog ground. Compensation network connection. Connected to the output of the voltage error amplifier. Feedback input pin of the error comparator. Power Ground-Noisy internal ground-Return currents from the power switch (SW). Shutdown control input, active high.
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS6101
ABSOLUTE MAXIMUM RATINGS (note 1)
VCC SW Voltage F/B Voltage Comp EN PWGD 15V 23V 7V 7V 7V 15V Maximum Junction Temperature Power Dissipation (Note2) Lead Temperature Vapor Phase (60 sec) Infrared (15 sec) ESD Susceptibility 150C Internally Limited 300C 215C 220C 2kV
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA= 25 C, VIN=2.7V, IL = 0A (unless otherwise noted) PARAMETER TEST CONDITIONS Min. (Note3) AMS6101 Typ. Max. (Note4) (Note3) 1.3 5 1.2285 3 1.26 4 6.7 0.013 0.5 2.5 40 78 480 V EN = VIN V EN = 0V V SW = 18V VIN = 2.7V, ISW = 1A Output High Output Low 135 135 85 600 0.01 -0.5 0.01 0.2 0.6 0.6 1.92 1.82 195 0.1 20 15 290 2.0 10 1.2915 Units
Quiescent Current Feedback Voltage Switch Current Limit Load Regulation Feedback Voltage Line Regulation FB Pin Bias Current Input Voltage Range Error Amp Transconductance Error Amp Voltage Gain Maximum Duty Cycle Switching Frequency Shutdown Pin Current Switch Leakage Current Switch RDSON Enable Threshold
FB = 0V (Not Switching) V EN = 0V VIN = 2.7 (Note 5) VIN = 3.3V 2.0V VIN 12.0V
mA A V A mV/mA %V nA V mho V/V % kHz A A V V V V
I = 5A
720 0.1 -1 3 0.4
0.9
0.3 On Threshold 1.8 2.0 Off Threshold 1.7 1.9 Thermal Resistance Junction to Ambient Note: 1). Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to be functional. 2). The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-toambient thermal resistance, JA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD (MAX) = (TJ (MAX) - TA) JA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. 3). All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). 4). Typical numbers are at 25C and represent the most likely norm. 5). Current limit at 0% duty cycle.
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS6101
TYPICAL PERFORMANCE CHARACTERISTICS
Full Load Switching
Full Load Ripple (Wide Band)
Start Up from Enable into Full Load
Start Up from Enable into Light Load
Switch Full Load Rise Time
Efficiency 90 88 86 84 82 % 80 78 76 74 72 70 0.1 0.15 0.2 0.25 0.3 Load Current
Switch Full Load Fall Time
0.35
0.4
0.45
0.5
Efficiency for 5V input and 12V Output Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS6101
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
8 LEAD SOIC PLASTIC PACKAGE (S)
0.189-0.197* (4.801-5.004) 8 7 6 5 8
0.123 (3.12) 0.137 (3.48) 7 6
5
0.228-0.244 (5.791-6. 197)
0.150-0.157** (3.810-3.988)
0.090 (2.28) 0.102 (2.59)
1
2
3
4
1
2
3
4
0.053-0.069 (1.346-1.752)
0.010-0.020 x 45 (0.254-0.508) 0.004-0.010 (0.101-0.254) 0.008-0. 010 (0.203-0.254) 0-8 TYP
0.014-0.019 (0.355-0.483)
0.050 (1.270) TYP
0.016-0.050 (0.406-1.270)
S (SO- 8 ) AMS DRW# 042293
0.024(0.61) 0.063(1.60)
0.050(1.27)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.105(2.67)
0.213(5.41)
0.138 (3.50) RECOMMENDED LAYOUT PATTERN
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723

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