REV. A Micropower, Step-Up/Step-Down SW a Regulator Adjustable and Fixed 3.3 V, 5 V, 12 V ADP1111 FEATURES FUNCTIONAL BLOCK DIAGRAMS Operates from 2 V to 30 V Input Voltage Range SET 72 kHz Frequency Operation Utilizes Surface Mount Inductors ADP1111 Very Few External Components Required A2 A0 Operates in Step-Up/Step-Down or Inverting Mode V IN Low Battery Detector GAIN BLOCK/ I ERROR AMP LIM User Adjustable Current Limit SW1 Internal 1 A Power Switch 1.25V Fixed or Adjustable Output Voltage REFERENCE A1 OSCILLATOR 8-Pin DIP or SO-8 Package DRIVER APPLICATIONS COMPARATOR 3 V to 5 V, 5 V to 12 V Step-Up Converters 9 V to 5 V, 12 V to 5 V Step-Down Converters GND FB SW2 Laptop and Palmtop Computers Cellular Telephones SET Flash Memory VPP Generators ADP1111-5 Remote Controls ADP1111-12 Peripherals and Add-On Cards A2 A0 V IN Battery Backup Supplies GAIN BLOCK/ I LIM ERROR AMP Uninterruptible Supplies Portable Instruments SW1 1.25V REFERENCE OSCILLATOR A1 DRIVER COMPARATOR SW2 R1 R2 220k GENERAL DESCRIPTION GND SENSE The ADP1111 is part of a family of step-up/step-down switch- ing regulators that operates from an input voltage supply of 2 V to 12 V in step-up mode and up to 30 V in step-down mode. The ADP1111 can be programmed to operate in step-up/step- down or inverting applications with only 3 external components. Maximum switch current can be programmed with a single resistor, and an open collector gain block can be arranged in The fixed outputs are 3.3 V, 5 V and 12 V and an adjustable multiple configuration for low battery detection, as a post linear version is also available. The ADP1111 can deliver 100 mA at regulator, undervoltage lockout, or as an error amplifier. 5 V from a 3 V input in step-up mode, or it can deliver 200 mA at 5 V from a 12 V input in step-down mode. If input voltages are lower than 2 V, see the ADP1110. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One One TTechnology echnology WWaayy, P, P.O.O. Bo. Box 9106, Norx 9106, Norwoodwood, M, MA 02062-9106, UA 02062-9106, U.S.A..S.A. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties TTel: 781.329.4700 el: 781.329.4700 wwwww.analogw.analog.com.com Tel: 617/329-4700 World Wide Web Site: REV. A ADP1111SPECIFICATIONS (0 C T +70 C, V = 3 V unless otherwise noted) A IN Parameter Conditions V Min Typ Max Units S QUIESCENT CURRENT Switch Off I 300 500 A Q INPUT VOLTAGE Step-Up Mode V 2.0 12.6 V IN Step-Down Mode 30.0 V COMPARATOR TRIP POINT 1 VOLTAGE ADP1111 1.20 1.25 1.30 V OUTPUT SENSE VOLTAGE ADP1111-3.3 V 3.13 3.30 3.47 V OUT 2 ADP1111-5 4.75 5.00 5.25 V 2 ADP1111-12 11.40 12.00 12.60 V COMPARATOR HYSTERESIS ADP1111 8 12.5 mV OUTPUT HYSTERESIS ADP1111-3.3 21 50 mV ADP1111-5 32 50 mV ADP1111-12 75 120 mV OSCILLATOR FREQUENCY f 54 72 88 kHz OSC DUTY CYCLE Full Load DC 43 50 65 % SWITCH ON TIME I Tied to V t 57 9 s LIM IN ON SW SATURATION VOLTAGE T = +25C A STEP-UP MODE V = 3.0 V, I = 650 mA V 0.5 0.65 V IN SW SAT V = 5.0 V, I = 1 A 0.8 1.0 V IN SW STEP-DOWN MODE V = 12 V, I = 650 mA 1.1 1.5 V IN SW FEEDBACK PIN BIAS CURRENT ADP1111 V = 0 V I 160 300 nA FB FB SET PIN BIAS CURRENT V = V I 270 400 nA SET REF SET GAIN BLOCK OUTPUT LOW I = 300 A SINK V = 1.00 V V 0.15 0.4 V SET OL REFERENCE LINE REGULATION 5 V V 30 V 0.02 0.075 %/V IN 2 V V 5 V 0.4 %/V IN 3 GAIN BLOCK GAIN R = 100 k A 1000 6000 V/V L V CURRENT LIMIT T = +25C A 220 from I to V I 400 mA LIM IN LIM CURRENT LIMIT TEMPERATURE COEFFICIENT 0.3 %/C SWITCH OFF LEAKAGE CURRENT T = +25C A Measured at SW1 Pin V = 12 V 1 10 A SW1 MAXIMUM EXCURSION BELOW GND T = +25C A I 10 A, Switch Off 400 350 mV SW1 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 k resistor connected between a 5 V source and the AO pin. 4 All limits at temperature extremes are guaranteed via correlation using standard statistical methods. Specifications subject to change without notice. REV. 0 2