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Toshiba Adds Ultra-Small Package 200mA CMOS LDO To Regulator Lineup

February 23, 2011

New TCR4SxWBG Series is First LDO from Toshiba in WCSP4 Package


IRVINE, Calif., — Toshiba America Electronic Components, Inc., (TAEC)* has announced the addition of the TCR4SxxWBG and TC4SxxDWBG series to its family of 200mA CMOS Low Drop-Out regulators (LDOs). Developed by Toshiba Corp., the new single-output LDO regulators feature an ultra-small WCSP4 package which measures 0.79mmx0.79mmx0.50mm and only requires a 0.63 mm2 mounting area. The TCR4SxxWBG and TCR4SxxDWBG series are ideal for applications that require high-density packaging, such as mobile phones, portable audio players and a range of mobile equipment. Toshiba also offers single-output LDO regulators in SMV, (SOT-25) , UFV, and ESV (SOT-553) packages.

An increasing number of low voltage applications require the use of LDOs, as these regulators provide a stable power supply voltage independent of load impedance, and input-voltage variations. Toshiba's TCR4SxxWBG LDO and TCR4SxxDWBG regulators feature an output voltage range from 1.2V and 3.6V in increments of 50mV. The maximum output current is 200mA and over-current protection functionality is built-in. In addition, Toshiba's TCR4SxxDWBG LDO regulators provide built-in auto-discharge and control pull-down resistor functions.

Product Lineup of Ultra-small Package (WCSP4) 200 mA CMOS LDO Single-output Regulators

Part Number
Auto-discharge function
TCR4S15WBG 1.5 N/A
  • Maximum output current (IOUT = 200 mA (max.))
  • Low bias current (IB = 45µA (typ.) TCR4SxxWBG @ IOUT = 0mA)
  • Low stand-by current (IB(OFF) = 0.1µA (typ.) @ in stand-by mode)
  • Low drop-out voltage (VIN - VOUT = 90mV (typ.) @ TCR4S25WBG/DWBG, IOUT = 50mA)
  • High ripple rejection (R.R. = 80dB (typ.) @ IOUT = 10mA, f =1 kHz)
  • Low output noise voltage (VNO = 30µVrms (typ.) @ TCR4S25WBG/DWBG, IOUT = 10mA, 10Hz < f < 100kHz)
  • Built-in over-current protection circuit
  • Ceramic capacitors (CIN = 0.1µF, COUT = 1.0µF) can be used
  • Ultra-small package WCSP4 (0.79mm x 0.79mm x 0.50mm)
  • Built-in auto-discharge function (TCR4SxxDWBG)
  • Built-in control pull-down resistor (TCR4SxxDWBG
TCR4S18WBG 1.8
TCR4S28WBG 2.8
TCR4S30WBG 3.0
TCR4S36WBG 3.6
TCR4S12DWBG 1.2 Built-in as standard
TCR4S285DWBG 2.85
TCR4S295DWBG 2.95

Note: Voltage regulators can be tailored to meet specifications with an output voltage rating in 50mV steps (1.2 to 3.6V)

WCSP4 Circuit Example (Top View

Example of How the Auto-Discharge Function Works in the 1.5 V Type

Package Line-up of CMOS LDO Single-output Regulators

SMV (SOT-25)
ESV (SOT-553)
WCSP4 (New)
Package (mm) 2.8 x 2.9 x 1.1 2.0 x2.1 x0.7 1.6 x1.6 x 0.55 0.79 x.0.79 x.0.5
Line-up Mounting Area (100%) 52% 32% 8%
Height (100% 63% 50% 45%
1.8V to 5.0V
1.2 to 5.0V
1.5V to 5.0V
1.8V to 3.6V
1.2V to 3.6V


The Toshiba CMOS LDOs are available now. Budgetary pricing begins at $0.15, with volume discounts available.

Toshiba's Discrete Products

Since 1986, Toshiba Corp. has ranked as the top discrete supplier on a worldwide basis, based on annual revenue from international shipments of total discrete products. According to the most recent annual report from market research firm Gartner Dataquest (San Jose, CA), Toshiba remained the top discrete semiconductor supplier. (Source: "2009 Worldwide Semiconductor Market Share Report," Gartner, released April 2010). More specifically, Toshiba is a leading supplier in a number of discrete product categories, including power transistors, rectifiers and thyristors, LMOS logic, CMOS logic, photocouplers, Toslinks TM , LEDs, small signal diodes and transistors. The company's discrete devices are designed to meet the growing demand for high-performance and lower voltages in today's wireless telecommunications and consumer electronics applications, while emphasizing its strength in the automotive and industrial markets.

*About TAEC and Toshiba Corp.

Through proven commitment, lasting relationships and advanced, reliable electronic components, Toshiba enables its customers to create market-leading designs. Toshiba is the heartbeat within product breakthroughs from OEMs, ODMs, CMs, distributors and fabless chip companies worldwide. A committed electronic components leader, Toshiba designs and manufactures high-quality flash memory -based storage solutions, discrete devices , displays , advanced materials, medical tubes , custom SoCs/ASICs , digital multimedia and imaging products , microcontrollers and wireless components that make possible today's leading cell phones, MP3 players, cameras, medical devices, automotive electronics and more.

Toshiba America Electronic Components, Inc. is an independent operating company owned by Toshiba America, Inc., a subsidiary of Toshiba Corporation, Japan's largest semiconductor manufacturer and the world's third largest semiconductor manufacturer (Gartner, 2009 WW Semiconductor Revenue, April 2010). Toshiba was founded in 1875, and today operates a global network of more than 740 companies, with 204,000 employees worldwide and annual sales surpassing $68 billion.

For additional company and product information, please visit

Information in this press release, including product pricing and specifications, content of services and contact information, is current and believed to be accurate on the date of the announcement, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable Toshiba product specifications. In developing designs, please ensure that Toshiba products are used within specified operating ranges as set forth in the most recent Toshiba product specifications and the information set forth in Toshiba's "Handling Guide for Semiconductor Devices," or "Toshiba Semiconductor Reliability Handbook." This information is available at, or from your TAEC representative.

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