Datasheet ADP5303 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 50 mA/500 mA, Ultralow Power Step-Down Regulator with Battery Voltage Monitor |
| Páginas / Página | 21 / 1 — 50 mA/500 mA, Ultralow Power Step-Down. Regulator With Battery Voltage … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 768 Kb |
| Idioma del documento | Inglés |
50 mA/500 mA, Ultralow Power Step-Down. Regulator With Battery Voltage Monitor. Data Sheet. ADP5303. FEATURES
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50 mA/500 mA, Ultralow Power Step-Down Regulator With Battery Voltage Monitor Data Sheet ADP5303 FEATURES TYPICAL APPLICATION CIRCUIT Input supply voltage range: 2.15 V to 6.50 V VIN = 2.2µH 2.15V TO 6.50V V Operates down to 2.00 V OUT PVIN SW Ultralow 240 nA quiescent current with no load 10µF ADP5303 10µF Selectable output voltages of 1.2 V to 3.6 V, or 0.8 V to 5.0 V (WLCSP-9) ON ±1.5% output accuracy over the full temperature range in PGND OFF EN pulse-width modulation (PWM) mode PWM Selectable hysteresis mode or PWM operation mode SYNC/ FB HYS MODE Output current VID0: 1.2V VID8: 2.5V VID1: 1.5V VID9: 2.6V Up to 50 mA in hysteresis mode VINOK VID VID2: 1.8V VID10: 2.7V VID3: 2.0V VID11: 2.8V Up to 500 mA in PWM mode R0 VID4: 2.1V VID12: 2.9V VID5: 2.2V VID13: 3.0V VINOK flag to monitor input battery voltage AGND VID6: 2.3V VID14: 3.3V
001 4-
VID7: 2.4V VID15: 3.6V 100% duty cycle operation mode
1344
2 MHz switching frequency with optional synchronization
Figure 1.
input from 1.5 MHz to 2.5 MHz Quick output discharge (QOD) option UVLO, OCP, and TSD protection 9-ball, 1.65 mm × 1.87 mm WLCSP Junction temperature: −40°C to +125°C APPLICATIONS Energy (gas, water) metering Portable and battery-powered equipment Medical applications Keep-alive power supply GENERAL DESCRIPTION
The ADP5303 is high efficiency, ultralow quiescent current The ADP5303 integrates an ultralow power comparator with a step-down regulator that draws only 240 nA quiescent current factory programmable voltage reference to monitor the input to regulate the output at no load. battery voltage. The regulator runs at a 2 MHz switching frequency The ADP5303 runs from an input voltage of 2.15 V to 6.50 V, in PWM mode and the SYNC/MODE pin can be synchronized allowing the use of multiple alkaline or NiMH cells, Li-Ion cells, to an external clock from 1.5 MHz to 2.5 MHz. or other power sources. The output voltage is selectable from 0.8 V Other key features in the ADP5303 include separate enabling, to 5.0 V by an external VID resistor and a factory fuse. The total QOD, and safety features such as overcurrent protection (OCP), solution requires only four tiny external components. thermal shutdown (TSD), and input undervoltage lockout The ADP5303 can operate between hysteresis mode and PWM (UVLO). mode via the SYNC/MODE pin. In hysteresis mode, the regulator The ADP5303 is available in 9-ball, 1.65 mm × 1.87 mm achieves excellent efficiency at less than 1 mW and provides up WLCSP package rated for the −40°C to +125°C junction to 50 mA of output current. In PWM mode, the regulator produces temperature range. a lower output ripple and supplies up to 500 mA of output current. The flexible configuration capability during operation of the device enables very efficient power management to meet both long battery life and low system noise requirements.
Rev. A Document Feedback 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 that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2015–2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY CYCLE OPERATION ACTIVE DISCHARGE VINOK FUNCTION THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE
001 4-
VID7: 2.4V VID15: 3.6V 100% duty cycle operation mode
1344
2 MHz switching frequency with optional synchronization
Figure 1.
input from 1.5 MHz to 2.5 MHz Quick output discharge (QOD) option UVLO, OCP, and TSD protection 9-ball, 1.65 mm × 1.87 mm WLCSP Junction temperature: −40°C to +125°C APPLICATIONS Energy (gas, water) metering Portable and battery-powered equipment Medical applications Keep-alive power supply GENERAL DESCRIPTION
The ADP5303 is high efficiency, ultralow quiescent current The ADP5303 integrates an ultralow power comparator with a step-down regulator that draws only 240 nA quiescent current factory programmable voltage reference to monitor the input to regulate the output at no load. battery voltage. The regulator runs at a 2 MHz switching frequency The ADP5303 runs from an input voltage of 2.15 V to 6.50 V, in PWM mode and the SYNC/MODE pin can be synchronized allowing the use of multiple alkaline or NiMH cells, Li-Ion cells, to an external clock from 1.5 MHz to 2.5 MHz. or other power sources. The output voltage is selectable from 0.8 V Other key features in the ADP5303 include separate enabling, to 5.0 V by an external VID resistor and a factory fuse. The total QOD, and safety features such as overcurrent protection (OCP), solution requires only four tiny external components. thermal shutdown (TSD), and input undervoltage lockout The ADP5303 can operate between hysteresis mode and PWM (UVLO). mode via the SYNC/MODE pin. In hysteresis mode, the regulator The ADP5303 is available in 9-ball, 1.65 mm × 1.87 mm achieves excellent efficiency at less than 1 mW and provides up WLCSP package rated for the −40°C to +125°C junction to 50 mA of output current. In PWM mode, the regulator produces temperature range. a lower output ripple and supplies up to 500 mA of output current. The flexible configuration capability during operation of the device enables very efficient power management to meet both long battery life and low system noise requirements.
Rev. A Document Feedback 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 that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2015–2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode Hysteresis Mode Mode Selection OSCILLATOR AND SYNCHRONIZATION ADJUSTABLE AND FIXED OUTPUT VOLTAGES UNDERVOLTAGE LOCKOUT (UVLO) ENABLE/DISABLE CURRENT LIMIT SHORT-CIRCUIT PROTECTION SOFT START STARTUP WITH PRECHARGED OUTPUT 100% DUTY CYCLE OPERATION ACTIVE DISCHARGE VINOK FUNCTION THERMAL SHUTDOWN APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION SELECTING THE INDUCTOR OUTPUT CAPACITOR INPUT CAPACITOR EFFICIENCY Power Switch Conduction Losses Inductor Losses Driver Losses Transition Losses PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE