News Release

New Product
April 11, 2013

New JRC introduced a step-down switching regulator with built-in MOSFET, well suitable for car accessory application and industrial use

Tokyo Japan, April 11, 2013- New Japan Radio Co., Ltd. (New JRC) has introduced to the market the NJW1933, 600mA, 500kHz, step-down switching regulator in SOT-23 package, well suitable for power supplies for car accessory application and industrial use.

General Description

The NJW1933 is a step-down switching regulator with a wide input voltage range from 4.5V to 40V and built-in MOSFET. It has a phase compensation circuit employing current mode control that provides a step-down converter with a few and tiny external parts.
Further, a high operating frequency of 500kHz allows engineers to use tiny inductor, and an internal optimized phase compensation circuit allows them to use multi layer ceramic capacitors. The NJW1933 is available in a tiny 6-lead SOT-23. It provides space saving of boards and downsizing of various power supply units with tiny package, tiny inductor and ceramic capacitor.


Providing step-down application with a minimum of external components

The internal phase compensation circuit employing the current mode control provides the step-down converter with a few extarenal parts.

Well suitable for downsizing in various power supply unit

The NJW1933 has the wide input voltage range from 4.5V to 40V, the high operating frequency and optimized phase compensation circuit that allow engineers to use tiny inductor, ceramic capacitors and to downsize various power supply units.

Feature and Characteristics

  • Maximum Rating Input Voltage : 45V
  • Wide Operating Voltage Range : 4.5V to 40V
  • Switching Current : 0.75A min.
  • Fixed Operating Frequency : 500kHz fixed
  • Low Shutdown Current : < 1µA
  • Internally Compensated
  • Internally Over Current Protection and Thermal Shutdown Circuit Soft Start Function
  • Soft Start Function
  • Uses Tiny Capacitors and Inductors
  • Output Adjustable Down to 1.25V
  • Package Outline : SOT-23-6 (2.9mm×2.8mm×1.1mm)
Package Outline of SOT-23-6


  • Supply for Industrial Controls such as inverter, programmable controller
  • Automotive applications : accessory devices, ECU
  • Regulation for various power supplies such as wall transformer etc.


  • Mass Production (MP): April, 2013
  • Engineering Sample (ES): Already available

These contents of a release are the information as of an announcement date. Please contact us about the latest information.

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