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RP124 Series

Low Supply Current 100mA LDO Regulator with Battery Monitor

  • Consumer
  • PLP
  • RoHS

The RP124 is an LDO regulator with a battery monitor (BM) featuring ultra-low supply current.

The battery monitor has a function which divides the input voltage (VIN) into 1/3 or 1/4. The battery charge remaining can be monitored by MCU. The buffering output enables directly inputting a signal into the low voltage A/D converter (ADC) with built-in MCU.

  • Achieving Low Supply Current of 0.3 µA, Longer Battery Life and Downsizing
  • Requiring Only Three External Capacitors and Suitable for Space-saving Mounting for the Smaller Packages

Specs & Datasheets

Input Voltage Range 1.7 V to 5.5 V (6.5 V)
Operating Temperature Range -40°C to 85°C (125°C)
Supply Current Typ. 0.2 µA (LDO Section)
Output Voltage Range 1.2 V, 1.5 V, 1.8 V, 2.1 V, 2.2 V, 2.3 V, 2.4 V, 2.5 V, 2.7 V, 2.8 V, 3.0 V, 3.1 V, 3.3 V, 3.6 V
Output Voltage Accuracy ±0.8% (Ta = 25°C)
Output Current 100 mA
Package DFN1212-6, SOT-23-5
BM Output Voltage VIN/3 (RP124xxx3x)
VIN/4 (RP124xxx4x)
BM Output Voltage Accuracy ±20 mV
BM Output Current Typ. 0.1 µA

Download Datasheet

Protections / Functions

Functional Description

TSD Reverse Current Limit ISC Inrush Constant Slope ECO mode Auto Discharge External Driver

Technical Documents

RP124xxxxE Typical Application

RP124xxxxE Typical Application

LDO Supply Current vs. Temperature, RP124x18xx, VIN = 2.8 V

LDO Supply Current vs. Temperature, RP124x18xx, VIN = 2.8 V

CIN = Ceramic 1.0 µF, COUT = Ceramic 1.0 µF

BM Supply Current vs. Temperature, RP124xxx4x, VIN = 3.6 V

BM Supply Current vs. Temperature, RP124xxx4x, VIN = 3.6 V

CIN = Ceramic 1.0 µF, CBM = Ceramic 0.1 µF

Introduction Video

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
DFN1212-6 RP124L RP124L
  • gradeConsumerC
  • plpP
SOT-23-5 RP124N RP124N-FE

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

TSD Thermal Shutdown Function
Reverse Current Protection Reverse Current Protection
Current Limit Overcurrent Protection
ISC Short Current Protection
Inrush Current Limit Inrush Current Protection
Constant Slope Constant Slope Function
ECO mode ECO Function
Auto Discharge Auto Discharge Function
External Driver External Output Driver Transistor

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