RP515x Series

Ultra-low Power Consumption 300 mA Buck DC/DC Converter

with Battery Monitor

No.EA-505-251006

1

The RP515x is a buck DC/DC converter with a Battery Monitor (BM) featuring ultra-low current and low-

voltage resistance. The battery monitor divides the input voltage (VIN) into 1/3 or 1/4, and directly provides

the MCU’s built-in low voltage AD converter with buffered voltage without external circuits.

● Ultra-low consumption current (IQ:0.3 μA ) with the VFM control for DC/DC (switching frequency: 1 MHz max.)

● High efficiency under light load conditions

● Reducing components and space by combining DC/DC and BM into a single chip

● Suitable for coin batteries and USB ports due to its wide input voltage range from 1.8 V to 5.5 V

DC/DC Section

● Supply Current: Typ. 0.3 μA

● Output Current: 300 mA

● Input Voltage Range: 1.8 V to 5.5 V

● Output Voltage Range : 1.0 V to 4.0 V

● Output Voltage Accuracy: ±1.5%

Battery Monitor Section

● Output Voltage: VIN /3 (RP515xxx3x)

VIN /4 (RP515xxx4x)

● Supply Current: Typ. 0.1 μA

WLCSP-9-P2

1.45 x 1.48 x 0.36 (mm)

DFN(PL)2527-10

2.7 x 2.5 x 0.6 (mm)

•

VOUT

LX

CE1

CE2

BM

Buck (Step-down)

DC/DC Converter

Battery Monitor

VIN

VOUT

VBM

CIN

COUT1

COUT2

Signal

Signal

MCU

VCC

ADC

RP515x

L

22 µF

0.1µF to 0.22 µF

PGND

AGND

PVIN

AVIN

C = Ceramic Capacitor

10 µF

2.2 µH

● Coin cell-used equipment and Li-ion battery-used equipment

● Wearable devices such as SmartWatch, SmartBand and Health monitoring

● Low Power RF Modules such as Bluetooth® LE, Zigbee, WiSun and ANT

● Low Power CPU, Memory, Sensor device and Energy Harvester

APPLICATIONS

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