Datasheet > CM4072

CM4072

更新时间： 2024-11-18 04:12:23

品牌	Logo	应用领域
CALMIRCO		驱动器稳压器泵
页数	文件大小	规格书
11页	304K
描述
Low Noise Charge Pump/Linear Regulator LED Driver

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

CM4072 数据手册

PRELIMINARY

CM4072

Low Noise Charge Pump/Linear Regulator LED Driver

Features

Product Description

The CM4072 Low-noise Charge Pump / LDO Regulator is

designed to power white backlight LEDs used in main dis-

plays or camera flash LEDs in wireless handsets. The 5V

output provides up to 100mA continuous current for input

voltages from 3.0V to 5.5V, and up to 200mA for a nar-

rower range. This is accomplished with an integrated

charge pump that boosts the input voltage before feeding

it to an internal LDO linear regulator. The CM4072 oper-

ates with excellent power supply ripple rejection while

maintaining good power efficiency. The device utilizes two

external capacitors and operates at 250kHz. Separate

analog and digital ground pins are provided for the charge

pump and the rest of the circuitry to eliminate ground

noise feed-through from the charge pump to the regulated

output.

•

Low noise regulator with integrated charge pump

voltage-booster

•

5V output with input voltage as low as 2.8V

Charge pump can also power an external LDO

Low noise in 20Hz to 20kHz audio band

Up to 200mA continuous output current

Low operating and shutdown currents

Stable with low-ESR ceramic or tantalum capaci-

tors

•

Over-current and over-temperature protection

10-lead TDFN package, 3mm x 3mm

Lead-free versions available

Applications

The CM4072 provides both overcurrent and thermal over-

load protection. Two enable inputs provide flexibility in

powering down the device. To maximize power saving in

shutdown mode, both enable inputs should be at a logic

low level. For applications that require the 5V output to be

re-established with minimum delay after shutdown, the

charge pump can be left enabled while the regulator is

disabled. The CMOS LDO regulator features low quies-

cent current even at full load, making it very suitable for

power sensitive applications.

•

White backlight LEDs for main display in wireless

handsets and LCD modules

•

Power flash LEDs for camera phones

3.3V to 5V conversion in PCMCIA cards, PCI

Express Cards, other applications needing 5V

5V analog supply for audio codec in notebook

computers, PDAs, MP3 players, etc

•

A bypass pin is provided to further minimize noise by con-

necting an external capacitor between this pin and

ground.

The CM4072 is available in a 10-lead TDFN package,

with optional lead-free finishing, and is ideal for space crit-

ical applications.

Typical Application

Simplified Block Diagram

CHARGE PUMP

DGND

CP-

CP+

V_CP

1μF

ENABLE CHARGE

PUMP

CM4072

TDFN-10

CONTROL

CIRCUIT

2.2μF

EN_CP

EN_LDO

ENABLE LDO

0.1μF*

BYP

V_REF

LDO

V_OUT

*Optional

PWM

0-200kHz

BYP

GND

11/08/05

490 N. McCarthy Blvd., Milpitas, CA 95035-5112

●

Tel: 408.263.3214

●

Fax: 408.263.7846

●

www.cmd.com

12 3 4 5 6 7...11

中文翻译

下载PDF

与CM4072相关器件

型号	品牌	获取价格	描述	数据表
CM4072-50DE	CALMIRCO	获取价格	Low Noise Charge Pump/Linear Regulator LED Driver
CM4072-50DF	CALMIRCO	获取价格	Low Noise Charge Pump/Linear Regulator LED Driver
CM40A	CML	获取价格	T-2 Telephone Slide Base - Type 3
CM40P03U	APPLIED POWER	获取价格	TO-252
CM41	CML	获取价格	T-3 1/4 Miniature Bayonet Base
CM415	CITIZEN	获取价格	TUNING FORK CRYSTAL UNIT (SMD ? Ceramic Package)
CM42	CML	获取价格	T-3 1/4 Miniature Bayonet Base
CM4-20	ETC	获取价格	Optoelectronic
CM420455	ETC	获取价格	THYRISTOR MODULE\|DOUBLER\|HALF-CNTLD\|POSITIVE\|400V V(RRM)\|55A I(T)
CM420855	POWEREX	获取价格	SCR/Diode POW-R-BLOK⑩ Modules 55 Amperes/800

与CM4072相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

17
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

12
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

42
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

37

产品中心

服务支持

精选活动

关于我们

帮助中心

CM4072

CM4072 数据手册

与CM4072相关器件

与CM4072相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

CM4072

CM4072 数据手册

与CM4072相关器件

与CM4072相关文章

您还可以找

您在本页遇到什么问题？