50 mA/500 mA, High Efficiency,
Ultralow Power Step-Down Regulator
Input start-up voltage range: 2.15 V to 6.50 V
Operates down to 2.00 V voltage
Ultralow 180 nA quiescent current with no load
Selectable output voltage of 1.2 V to 3.6 V or 0.8 V to 5.0 V
±1.5% output accuracy over full temperature range in
Selectable hysteresis mode or PWM operation mode
Up to 50 mA in hysteresis mode
Up to 500 mA in PWM mode
VOUTOK flag monitors the output voltage
100% duty cycle operation mode
2 MHz switching frequency with optional synchronization
input from 1.5 MHz to 2.5 MHz
UVLO, OCP, and TSD protection
9-ball, 1.65 mm × 1.87 mm WLCSP
−40°C to +125°C junction temperature
Energy (gas and water) metering
Portable and battery-powered equipment
Keep-alive power supplies
The ADP5301 is a high efficiency, ultralow quiescent current
step-down regulatorthat draws only a 180 nA quiescent current
to regulate the output at no load.
The ADP5301 runs from an inputstartup voltage range of 2.15 V
to 6.50 V, allowing the use ofmultiple alkaline/NiMH, Li-Ion
cells, or otherpowersources.The output voltage is selectable from
0.8 V to 5.0 V by an external VID resistor and factory fuse. The
total solution requires only fourtiny external components.
The ADP5301 can operate betweenhysteresis mode and PWM
mode via the SYNC/MODE pin. The regulator in hysteresismode
achieves excellent 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 andsuppliesup to 500 mA
of output current. The flexible configuration capability during
operation of the device enables veryefficient power management
to meet both the longest battery life and low system noise
TYPICAL APPLICATION CIRCUIT
VIN = 3.6V
The ADP5301 contains a VOUTOK flag, which monitors the
output voltage and runs at a 2 MHz switching frequency in
PWM mode. SYNC/MODE can synchronize to an external
clock from 1.5 MHz to 2.5 MHz.
Other key features in the ADP5301 include separate enabling,
quick output discharge (QOD), and safety featuressuch as
overcurrent protection (OCP), thermal shutdown(TSD), and
input undervoltage lockout (UVLO).
The ADP5301 is available in a 9-ball, 1.65 mm × 1.87 mm
WLCSP ratedfor a −40°C to +125°C junctiontemperature range.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility isassumedby AnalogDevicesforits use,norforany infringements of patents orother
rights of thirdparties thatmay resultfrom its use.Specificationssubjecttochangewithoutnotice.No
license is granted by implicationor otherwise underany patentorpatentrights of AnalogDevices .
Trademarks andregistered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2015–2016 Analog Devices, Inc. All rights reserved.