Datasheet > MAX1779

MAX1779

更新时间： 2024-02-23 03:40:52

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美信 - MAXIM		转换器
页数	文件大小	规格书
18页	503K
描述
Low-Power Triple-Output TFT LCD DC-DC Converter

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数据手册

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MAX1779 数据手册

19-1795; Rev 0; 11/00

Low-Power Triple-Output TFT LCD DC-DC

Converter

General Description

Features

The MAX1779 triple-output DC-DC converter provides

highly efficient regulated voltages required by small

active matrix, thin-film transistor (TFT) liquid-crystal dis-

plays (LCDs). One high-power DC-DC converter and

two low-power charge pumps convert the +2.7V to

+5.5V input supply voltage into three independent out-

put voltages.

o Three Integrated DC-DC Converters

o 250kHz Current-Mode PWM Boost Regulator

Up to +13V Main High-Power Output

1ꢀ ꢁAAuraAc

High EffiAienAc (91ꢀ)

o Dual Charge-Pump Outputs

Up to +40V Positive Charge-Pump Output

Down to -40V Negative Charge-Pump Output

The primary high-power DC-DC converter generates a

boosted output voltage (V

) up to 13V that is regu-

MAIN

lated within 1ꢀ. The low-power ꢁiCMOꢂ control cir-

cuitry and the low on-resistance (1Ω) of the integrated

power MOꢂFET allows efficiency up to 91ꢀ. The

250kHz current-mode pulse-width modulation (PWM)

architecture provides fast transient response and

allows the use of ultra-small inductors and ceramic

capacitors.

o Internal Supplc SequenAing

o Internal Power MOSFETs

o +2.7V to +5.5V Input Supplc

o 0.1µꢁ Shutdown Current

o 0.5mꢁ QuiesAent Current

o Internal Soft-Start

o Power-Readc Output

o Ultra-Small External Components

o Thin TSSOP PaAkage (1.1mm max)

The dual charge pumps independently regulate one

positive output (V

) and one negative output (V

NEG

POꢂ

These low-power outputs use external diode and

capacitor stages (as many stages as required) to regu-

late output voltages up to +40V and down to -40V. A

proprietary regulation algorithm minimizes output rip-

ple, as well as capacitor sizes for both charge pumps.

Ordering Information

The MAX1779 is available in the ultra-thin TꢂꢂOP pack-

age (1.1mm max height).

PꢁRT

TEMP. RꢁNGE

PIN-PꢁCKꢁGE

MAX1779EUE

-40°C to +85°C

16 TꢂꢂOP

Pin Configuration

________________________Applications

TOP VIEW

TFT Active-Matrix LCD Displays

Passive-Matrix LCD Displays

PDAs

RDY

16 TGND

15 LX

INTG

14 PGND

Digital-ꢂtill Cameras

Camcorders

MAX1779

13 SUPP

12 DRVP

11 SUPN

10 DRVN

GND

REF

FBP

FBN

SHDN

TSSOP

Typical Operating Circuit appears at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...18

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与MAX1779相关器件

型号	品牌	获取价格	描述	数据表
MAX1779EUE	MAXIM	获取价格	Low-Power Triple-Output TFT LCD DC-DC Converter
MAX177C/D	MAXIM	获取价格	CMOS 10-Bit A/D Converter with Track-and-Hold
MAX177CNG	MAXIM	获取价格	CMOS 10-Bit A/D Converter with Track-and-Hold
MAX177CNG+	MAXIM	获取价格	ADC, Successive Approximation, 10-Bit, 1 Func, 1 Channel, Parallel, Word Access, CMOS, PDI
MAX177CNG-T	MAXIM	获取价格	ADC, Successive Approximation, 10-Bit, 1 Func, 1 Channel, Parallel, Word Access, CMOS, PDI
MAX177CWG	MAXIM	获取价格	CMOS 10-Bit A/D Converter with Track-and-Hold
MAX177CWG+	MAXIM	获取价格	ADC, Successive Approximation, 10-Bit, 1 Func, 1 Channel, Parallel, Word Access, CMOS, PDS
MAX177CWG+T	MAXIM	获取价格	ADC, Successive Approximation, 10-Bit, 1 Func, 1 Channel, Parallel, Word Access, CMOS, PDS
MAX177CWG-T	MAXIM	获取价格	ADC, Successive Approximation, 10-Bit, 1 Func, 1 Channel, Parallel, Word Access, CMOS, PDS
MAX177ENG	MAXIM	获取价格	CMOS 10-Bit A/D Converter with Track-and-Hold

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