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ADP1173 Dataheets PDF



Part Number ADP1173
Manufacturers Analog Devices
Logo Analog Devices
Description Micropower DC-DC Converter
Datasheet ADP1173 DatasheetADP1173 Datasheet (PDF)

a FEATURES Operates From 2.0 V to 30 V Input Voltages Only 110 ␮A Supply Current (Typical) Step-Up or Step-Down Mode Operation Very Few External Components Required Low Battery Detector On-Chip User-Adjustable Current Limit Internal 1 A Power Switch Fixed or Adjustable Output Voltage Versions 8-Pin DIP or SO-8 Package APPLICATIONS Notebook and Palmtop Computers Cellular Telephones Flash Memory Vpp Generators 3 V to 5 V, 5 V to 12 V Converters 9 V to 5 V, 12 V to 5 V Converters Portable Instrumen.

  ADP1173   ADP1173


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a FEATURES Operates From 2.0 V to 30 V Input Voltages Only 110 ␮A Supply Current (Typical) Step-Up or Step-Down Mode Operation Very Few External Components Required Low Battery Detector On-Chip User-Adjustable Current Limit Internal 1 A Power Switch Fixed or Adjustable Output Voltage Versions 8-Pin DIP or SO-8 Package APPLICATIONS Notebook and Palmtop Computers Cellular Telephones Flash Memory Vpp Generators 3 V to 5 V, 5 V to 12 V Converters 9 V to 5 V, 12 V to 5 V Converters Portable Instruments LCD Bias Generators VIN Micropower DC-DC Converter ADP1173 FUNCTIONAL BLOCK DIAGRAMS SET ADP1173 A2 VIN GAIN BLOCK/ ERROR AMP 1.245V REFERENCE AO ILIM SW1 A1 OSCILLATOR DRIVER SW2 COMPARATOR GND FB SET ADP1173-3.3 ADP1173-5 ADP1173-12 A2 GAIN BLOCK/ ERROR AMP 1.245V REFERENCE AO ILIM SW1 A1 OSCILLATOR DRIVER ADP1173-3.3: R1 = 456kΩ ADP1173-5: R1 = 250kΩ ADP1173-12: R1 = 87.4kΩ SENSE SW2 GENERAL DESCRIPTION The ADP1173 is part of a family of step-up/step-down switching regulators that operates from an input supply voltage of as little as 2 V to 12 V in step-up mode and to 30 V in step-down mode. The ADP1173 consumes as little as 110 µA in standby mode, making it ideal for applications that need low quiescent current. An auxiliary gain amplifier can serve as a low battery detector, linear regulator (under voltage lockout) or error amplifier. The ADP1173 can deliver 80 mA at 5 V from a 3 V input in step-up configuration or 100 mA at 5 V from a 12 V input in step-down configuration. For input voltages of less than 2 V use the ADP1073. R1 COMPARATOR R2 753kΩ GND REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997 ADP1173–SPECIFICATIONS (@ T = 0؇C to +70؇C, V A IN = 3 V unless otherwise noted) Min Typ 110 135 135 250 2.0 1.20 3.14 4.75 11.4 1.245 3.30 5.00 12.0 5 13 20 50 16 24 55 23 60 70 0.15 0.2 0.02 0.5 0.8 12.6 30 1.30 3.46 5.25 12.6 12 35 55 100 32 63 32 290 150 0.4 0.4 0.075 0.85 1.0 1.4 1.5 1.7 Max 150 Units µA µA µA µA V V V V V V mV mV mV mV kHz % µs nA nA V %/V %/V V V V V V V/V mA Model QUIESCENT CURRENT Symbol IQ Conditions Switch Off No Load, TA = +25°C ADP1173-3.3 ADP1173-5 ADP1173-12 Step-Up Mode Step-Down Mode ADP11731 QUIESCENT CURRENT, BOOST MODE IQ CONFIGURATION INPUT VOLTAGE COMPARATOR TRIP POINT VOLTAGE OUTPUT SENSE VOLTAGE VIN VOUT ADP1173-3.32 ADP1173-52 ADP1173-122 ADP1173 ADP1173-3.3 ADP1173-5 ADP1173-12 COMPARATOR HYSTERESIS OUTPUT HYSTERESIS OSCILLATOR FREQUENCY DUTY CYCLE SWITCH ON TIME FEEDBACK PIN BIAS CURRENT SET PIN BIAS CURRENT GAIN BLOCK OUTPUT LOW REFERENCE LINE REGULATION SWSAT VOLTAGE, STEP-UP MODE fOSC Full Load tON ILIM Tied to VIN ADP1173, VFB = 0 V VSET = VREF VOL ISINK = 100 µA, VSET = 1.00 V 2.0 V ≤ VIN ≤ 5 V 5 V ≤ VIN ≤ 30 V VSAT VIN = 3.0 V, ISW = 650 mA VIN = 5.0 V, ISW = 1 A, TA = +25°C VIN = 5.0 V, ISW = 1 A VIN = 12 V, TA = +25°C, ISW = 650 mA VIN = 12 V, ISW = 650 mA RL = 100 kΩ3 220 Ω from ILIM to VIN TA = +25°C 43 15 SWSAT VOLTAGE, STEP-DOWN MODE VSAT 1.1 400 1000 400 GAIN BLOCK GAIN CURRENT LIMIT CURRENT LIMIT TEMPERATURE COEFFICIENT SWITCH-OFF LEAKAGE CURRENT MAXIMUM EXCURSION BELOW GND AV –0.3 Measured at SW1 Pin TA = +25°C VSW2 ISW1 ≤ 10 µA, Switch Off TA = +25°C 1 –400 10 –350 %/°C µA mV NOTES 1 This specification guarantees that both the high and low trip points of the comparator fall within the 1.20 V to 1.30 V range. 2 The output voltage waveform will exhibit a sawtooth shape due to the comparator hysteresis. The output voltage on the fixed output versions will always be within the specified range. 3 100 kΩ resistor connected between a 5 V source and the AO pin. Specifications subject to change without notice. –2– REV. 0 ADP1173 ABSOLUTE MAXIMUM RATINGS* PIN CONFIGURATIONS N-8 8-Lead Plastic DIP ILIM VIN SW1 SW2 1 2 8 FB (SENSE)* Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V SW1 Pin Voltage (VSW1) . . . . . . . . . . . . . . . . . . . . . . . . . 50 V SW2 Pin Voltage (VSW2) . . . . . . . . . . . . . . . . . . –0.5 V to VIN Feedback Pin Voltage (ADP1173) . . . . . . . . . . . . . . . . . . . 5 V Sense Pin Voltage (ADP1173, –3.3, –5, –12) . . . . . . . . . 36 V Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 500 mW Maximum Switch Current . . . . . . . . . . . . . . . . . . . . . . . .1.5 A Operating Temperature Range . . . . . . . . . . . . . 0°C to +70°C Storage Temperature Range . . . . . . . . . . . . . –65°C to 150°C Lead Temperature, (Soldering, 10 sec) . . . . . . . . . . . . +300°C *Stresses abo.


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