Datasheet > ADM8839ACPZ-REEL7

ADM8839ACPZ-REEL7

更新时间： 2024-02-17 12:24:29

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
12页	705K
描述
Charge Pump Regulator for Color TFT Panel

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ADM8839ACPZ-REEL7 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	QFN
包装说明：	HVQCCN, LCC20,.16SQ,20	针数：	20
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.71
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-N20	JESD-609代码：	e3
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
封装等效代码：	LCC20,.16SQ,20	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）：	260
电源：	3 V	认证状态：	Not Qualified
座面最大高度：	1 mm	子类别：	Power Management Circuits
最大供电电流 (Isup)：	0.5 mA	标称供电电压 (Vsup)：	3 V
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：	Matte Tin (Sn)
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：	40
宽度：	4 mm	Base Number Matches：	1

ADM8839ACPZ-REEL7 数据手册

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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

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

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