Offers both excellent common-mode noise rejection and versatile, compact size for car audio external input block

June 12, 2006

High Precision CMOS LDOs NJU7254,NJU7777

12 June 2006 - New Japan Radio Co., Ltd. is pleased to announce the NJU7777 and the NJU7254. The NJU7777 is a CMOS low dropout regulator IC featuring high precision, low current consumption and a high ripple rejection ratio. Housed in small package, it is ideal as a power source for battery-operated portable devices. The NJU7254 is a 2-output low dropout regulator IC also suitable as a power source for small portable devices.

The NJU7777 is an LDO (Low dropout) regulator with half the mount size of conventional products. Using the refined manufacturing process of our conventional NJU7771, which features low current consumption and a high ripple rejection ratio (PSRR), the NJU7777 now can be housed in an ultra-small SC82AB package (2.0×2.1×0.95mm), which has a 48% smaller mount size than our conventional product, SOT-23-5 (2.9×2.8×1.2mm).

While its current consumption is as low as 18µA (typ.), the NJU7777 features a 65dB ripple rejection ratio, maximum 150mA output current, ±1.0% output voltage accuracy, 0.13V input/output electrical potential difference (standard, at 100mA output with 3.0V product), an overheat protection circuit and an overcurrent protection circuit for small battery-operated portable devices such as mobile phones, DSCs (digital still cameras) and DVCs (digital video cameras).

The NJU7254 is a 2-circuit low dropout regulator that employs two identical LDO circuits in same space and package as one output LDO can occupy. Using CMOS processing, the NJU7254 features a high ripple rejection ratio as well as low current consumption (30µA and 89% reduction for a 270µA bipolar product), which is ideal for small, portable and highly integrated battery-operated devices with dispersion type power sources.

Product Name Packaging
NJU7254 SOT-23-6-1
NJU7254
[ Features and Characteristics ]
· Low current consumption 18µA/ch(typ.) 30µA/total(typ.)
· Output capacitor with 1.0µF ceramic capacitor
· High precision output ±1.0%
· Low drop out voltage 0.09V (typ.)@Io=60mA,Vo=3.0V version
· ON/OFF control(each ch.)
· Maximum input voltage 9V
[ Schedule ]
  Engineering Samples (ES):From June 2006
  Mass Production (MP):From August 2006
[ Sample Price ]
  JPY 50/Unit.
Product Name Packaging
NJU7777 SC82AB
NJU7777
[ Features and Characteristics ]
· High ripple rejection 65dB (f=1kHz, Vo=3.0V version)
· Low current consumption 18µ(typ.)
· Output capacitor with 1.0µF ceramic capacitor
· High precision output ±1.0%
· Low drop out voltage 0.13V (typ.) @Io=100mA, Vo=3.0V version
· ON/OFF control
· Maximum input voltage 9V
[ Schedule ]
  Engineering Samples (ES):From June 2006
  Mass Production (MP):From August 2006
A detailed spec is here
NJU7254
NJU7777

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