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ADM8839ACP

更新时间： 2024-01-01 09:40:06
品牌 Logo 应用领域
罗彻斯特 - ROCHESTER 开关
页数 文件大小 规格书
13页 1125K
描述
SWITCHED CAPACITOR REGULATOR, 140 kHz SWITCHING FREQ-MAX, QCC20, 4 X 4 MM, MO-220VGGD-1, LFCSP-20

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ADM8839ACP 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：QFN
包装说明：HVQCCN,针数：20
Reach Compliance Code：unknown风险等级：5.21
模拟集成电路 - 其他类型：SWITCHED CAPACITOR REGULATOR最大输入电压：4.2 V
最小输入电压：2.7 V标称输入电压：3 V
JESD-30 代码：S-XQCC-N20JESD-609代码：e0
长度：4 mm湿度敏感等级：3
功能数量：1端子数量：20
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：HVQCCN
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：240座面最大高度：1 mm
表面贴装：YES切换器配置：TRIPLER
最大切换频率：140 kHz技术：CMOS
温度等级：INDUSTRIAL端子面层：TIN LEAD
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：30
宽度：4 mmBase Number Matches：1

ADM8839ACP 数据手册

 浏览型号ADM8839ACP的Datasheet PDF文件第1页浏览型号ADM8839ACP的Datasheet PDF文件第3页浏览型号ADM8839ACP的Datasheet PDF文件第4页浏览型号ADM8839ACP的Datasheet PDF文件第5页浏览型号ADM8839ACP的Datasheet PDF文件第6页浏览型号ADM8839ACP的Datasheet PDF文件第7页 
Charge Pump Regulator  
for Color TFT Panels  
ADM8839  
FUNCTIONAL BLOCK DIAGRAM  
C5, 2.2µF  
FEATURES  
3 voltages (+5 V, +15 V, −15 V) from a single 3 V supply  
Power efficiency optimized for use with TFT in mobile  
phones  
Low quiescent current  
Low shutdown current (<5 μA)  
Shutdown function  
V
CC  
C1+  
ADM8839  
VOLTAGE  
DOUBLER  
C1, 2.2µF  
C1–  
VOUT  
LDO_IN  
OSCILLATOR  
Option to use external LDO  
LDO  
VOLTAGE  
REGULATOR  
C6, 2.2µF  
CONTROL  
LOGIC  
+5VOUT  
+5VIN  
LDO_ON/OFF  
APPLICATIONS  
Hand-held instruments  
TFT LCD panels  
+5V  
C7, 2.2µF  
C2+  
DOUBLE  
C2, 0.22µF  
VOLTAGE  
TRIPLER  
C2–  
C3+  
Cellular phones  
TRIPLE  
C3, 0.22µF  
TIMING  
GENERATOR  
C3–  
+15VOUT  
C4+  
+15V  
C8, 0.22µF  
VOLTAGE  
SHUTDOWN  
CONTROL  
INVERTER  
C4, 0.22µF  
SHDN  
C4–  
DISCHARGE  
GND  
–15VOUT  
–15V  
C9, 0.22µF  
Figure 1.  
GENERAL DESCRIPTION  
The ADM8839 is a charge pump regulator used for color thin  
film transistor (TFT) liquid crystal displays (LCDs). Using  
charge pump technology, the device can be used to generate  
three voltages (+5 V ꢀ2, +ꢁ5 V, −ꢁ5 V) from a single 3 V  
supply. These voltages are then used to provide supplies for the  
LCD controller (5 V) and the gate drives for the transistors in  
the panel (+ꢁ5 V and −ꢁ5 V). Only a few external capacitors are  
needed for the charge pumps. An efficient low dropout (LDO)  
voltage regulator ensures that the power efficiency is high, and  
provides a low ripple 5 V output. This LDO can be shut down  
and an external LDO can be used to regulate the 5 V doubler  
output and drive the input to the charge pump section that  
generates the +ꢁ5 V and −ꢁ5 V outputs, if required by the user.  
The ADM8839 has a power save shutdown feature. The 5 V  
output consumes the most power, so power efficiency is also  
maximized on this output with an oscillator-enabling scheme  
(Green Idle™). This effectively senses the load current that is  
flowing and turns on the charge pump only when charge needs  
to be delivered to the 5 V pump doubler output.  
The ADM8839 is fabricated using CMOS technology for  
minimal power consumption. The part is packaged in a ꢀ0-lead  
LFCSP (lead frame chip scale package).  
Rev. C  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights ofthird parties that may result fromits use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
 
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