Datasheet ADP5301 (Analog Devices)

50 mA/500 mA, High Efficiency, Ultralow Power Step-Down Regulator Data Sheet ADP5301 FEATURES TYPICAL APPLICATION CIRCUIT Input start-up voltage range: 2.15 V to 6.50 V 2.2µH Operates down to 2.00 V voltage V V IN = 3.6V OUT PVIN SW Ultralow 180 nA quiescent current with no load 10µF ADP5301 Selectable output voltage of 1.2 V to 3.6 V or 0.8 V to 5.0 V 10µF (9-BALL WLCSP) ON ±1.5% output accuracy over full temperature range in EN PGND OFF PWM mode Selectable hysteresis mode or PWM operation mode PWM
001
SYNC/ FB HYS MODE Output current
13169-
Up to 50 mA in hysteresis mode VID0: 1.2V VID8: 2.5V VOUTOK VID VID1: 1.5V VID9: 2.6V Up to 500 mA in PWM mode VID2: 1.8V VID10: 2.7V RVID VID3: 2.0V VID11: 2.8V VOUTOK flag monitors the output voltage VID4: 2.1V VID12: 2.9V AGND VID5: 2.2V VID13: 3.0V 100% duty cycle operation mode VID6: 2.3V VID14: 3.3V VID7: 2.4V VID15: 3.6V 2 MHz switching frequency with optional synchronization
Figure 1.
input from 1.5 MHz to 2.5 MHz QOD option UVLO, OCP, and TSD protection 9-ball, 1.65 mm × 1.87 mm WLCSP −40°C to +125°C junction temperature APPLICATIONS Energy (gas and water) metering Portable and battery-powered equipment Medical applications Keep-alive power supplies GENERAL DESCRIPTION
The ADP5301 is a high efficiency, ultralow quiescent current The ADP5301 contains a VOUTOK flag, which monitors the step-down regulator that draws only a 180 nA quiescent current output voltage and runs at a 2 MHz switching frequency in to regulate the output at no load. PWM mode. SYNC/MODE can synchronize to an external The ADP5301 runs from an input startup voltage range of 2.15 V clock from 1.5 MHz to 2.5 MHz. to 6.50 V, allowing the use of multiple alkaline/NiMH, Li-Ion Other key features in the ADP5301 include separate enabling, cells, or other power sources. The output voltage is selectable from quick output discharge (QOD), and safety features such as 0.8 V to 5.0 V by an external VID resistor and factory fuse. The overcurrent protection (OCP), thermal shutdown (TSD), and total solution requires only four tiny external components. input undervoltage lockout (UVLO). The ADP5301 can operate between hysteresis mode and PWM The ADP5301 is available in a 9-ball, 1.65 mm × 1.87 mm mode via the SYNC/MODE pin. The regulator in hysteresis mode WLCSP rated for a −40°C to +125°C junction temperature range. achieves excel ent efficiency at a power of less than 1 mW and provides up to 50 mA of output current. The regulator in PWM mode produces 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 the longest battery life and low system noise requirements.
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Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATION 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 A PRECHARGED OUTPUT 100% DUTY CYCLE OPERATION ACTIVE DISCHARGE VOUTOK 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 (PCB) LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE