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Home > News > TOSHIBA launches a high ripple rejection ratio and low noise LDO regulator with higher power line stability

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TOSHIBA launches a high ripple rejection ratio and low noise LDO regulator with higher power line stability

  • Author:TOSHIBA
  • Release on:2021-01-18

Shanghai, China-Toshiba Electronic Components and Storage Co., Ltd. ("Toshiba") today announced the launch of a "TCR3RM series"To provide a more stable DC power supply for mobile electronic devices such as smart phones and wearable devices. The first batch of products in this series will begin shipping today, and other products will also be launched.

The new TCR3RM series combines bandgap circuits, low-pass filters (allowing only very low frequencies), and low-noise high-speed operational amplifiers to achieve industry-leading[1]High ripple rejection ratio[2]And low output noise voltage.

The 32 products in this series provide a maximum output current of 300mA and an output voltage between 0.9V and 4.5V. Customers can choose the output voltage according to the actual application.

This series of products adopts a compact DFN4C package with a size of only 1mm×1mm, which is suitable for mobile devices that require high-density mounting, similar to the power supply for cameras, audio, and RF circuits in smart phones and wearable devices.

In an ordinary LDO regulator, when the input voltage noise frequency exceeds 1kHz, the ripple rejection ratio is reduced by about 20dB for every 10 times the frequency increases. When the noise frequency exceeds 100kHz, the ripple rejection ratio decreases by about 40dB for every 10 times the frequency increases. Therefore, the LDO regulator may not be sufficient to eliminate noise with a frequency exceeding 100 kHz generated in a DC-DC converter circuit or similar circuit.

The new product provides excellent ripple rejection ratio and output noise voltage characteristics, even if the noise frequency reaches or exceeds 100kHz, it can eliminate circuit noise. This helps stabilize the power supply voltage and provide higher output voltage accuracy.

application

Mobile devices

  • smart phone
  • Wearable device
  • Audio system
  • RF circuit, etc.

characteristic

  • High ripple rejection ratio:
    R.R. = 100dB (typical value) @f = 1kHz, VOUT＝2.8V
    R.R. = 68dB (typical value) @f = 100kHz, VOUT＝2.8V
  • Low output noise voltage: VNO＝5μVrms (typical value) @10Hz≤f≤100kHz
  • Low quiescent current: IB(ON)＝7μA (typical value) @IOUT=0mA
  • Small and thin compact DFN4C package: 1.0mm×1.0mm, thickness = 0.38mm (typical value)

Main specifications

Device model

TCR3RMxxA[3]

Package

name

DFN4C

Typical size (mm)

@Ta＝25°C

1.0×1.0, thickness=0.38

The scope of work

(@T＝－40 to 85°C)

Output current IOUT(MA)

300

Output voltage VOUT(V)

0.9 to 4.5

Input voltage VIN(V)

1.8 to 5.5

Electrical characteristics

(Unless otherwise stated, @Tj=25℃)

The output voltage

VOUTMin/Max (mV)

@VOUT＜1.8V, Tj＝－40 to 85°C

－36/36

The output voltage

VOUTMin/Max (%)

@VOUT≥1.8V, Tj＝－40 to 85°C

-2/2

Quiescent Current

IB(ON)Typical value (μA)

@IOUT=0mA[4]

7

Ripple rejection ratio

R.R. typical value (dB)

@f＝1kHz, Ta＝25°C

100

@f=10kHz, Ta＝25°C

93

@f=100kHz, Ta＝25°C

68

@f＝1MHz, Ta＝25°C

68

@f=2MHz, Ta＝25°C

67

Output noise voltage

VNO Typical value (μVrms)

@IOUT＝10mA, Ta＝25°C

5

Drop voltage

VDO Typical value (mV)

@VOUT=2.8V, IOUT＝300mA

130

Load transient response

⊿VOUTTypical value (mV)

@IOUT＝1mA→300mA

-30

@IOUT＝300mA→1mA

30

Output voltage slew rate

VOUTSR Typical value (mV/μs)

@VOUT＝2.8V

4

Inventory inquiry and purchase

Note:
[1] LDO regulator with a maximum output current of 300mA, as of Toshiba survey results on October 28, 2020.
[2] Ripple rejection ratio (R.R.: Ripple rejection Ratio) is the same as the power supply rejection ratio (PSRR: Power Supply Rejection Ratio) marked on other manufacturers' products.
[3] 32 products. This number indicates that the output voltage has reached "XX".
[4] Control pull-down current (ICT)except.

For more information about related new products, please visit:

TCR3RM series

For more information about Toshiba LDO regulators, please visit:

Low voltage regulator (LDO regulator)

To learn about the availability of relevant new product online distributor websites, please visit:

TCR3RMxxA

Customer inquiry:

Japan headquarters
Small signal device sales and marketing department
Phone: +81-3-3457-3411
contuct us

China area
Discrete Marketing (Discrete Marketing)
Shanghai: 021-6090-0610 / Shenzhen: 0755-3661-5889
contuct us

*The company names, product names and service names mentioned in this article may be trademarks of their respective companies.
*The product prices and specifications, service content, and contact information in this document are still the latest information on the date of the announcement and are subject to change without notice.