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CM4072-50DF PDF预览

CM4072-50DF

更新时间： 2024-10-30 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

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中文翻译

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CM4072-50DF 技术参数

生命周期：Obsolete零件包装代码：SON
包装说明：HVSON,针数：10
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.84
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：S-XDSO-N10
长度：3 mm功能数量：1
区段数：1端子数量：10
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：UNSPECIFIED封装代码：HVSON
封装形状：SQUARE封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
认证状态：Not Qualified座面最大高度：0.8 mm
最大供电电压：5.5 V最小供电电压：2.8 V
标称供电电压：5 V表面贴装：YES
温度等级：INDUSTRIAL端子形式：NO LEAD
端子节距：0.5 mm端子位置：DUAL
宽度：3 mmBase Number Matches：1

CM4072-50DF 数据手册

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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  
1
CHARGE PUMP  
DGND  
CP-  
C
10  
9
P
2
3
V
IN  
1
2
3
4
5
10  
9
C
CP+  
P
VCP  
1μF  
+
V
IN  
C
S
ENABLE CHARGE  
PUMP  
CM4072  
TDFN-10  
8
CONTROL  
CIRCUIT  
7
6
+
C
2.2μF  
S
EN_CP  
7
EN_LDO  
CS  
ENABLE LDO  
6
+
0.1μF*  
C
BYP  
8
VREF  
LDO  
VOUT  
*Optional  
PWM  
0-200kHz  
5
4
BYP  
GND  
© 2005 California Micro Devices Corp. All rights reserved.  
11/08/05  
490 N. McCarthy Blvd., Milpitas, CA 95035-5112  
●
Tel: 408.263.3214  
●
Fax: 408.263.7846  
●
www.cmd.com  
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中文翻译

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