MAX1774

更新时间： 2024-02-28 09:55:28

品牌	Logo	应用领域
美信 - MAXIM		转换器电池
页数	文件大小	规格书
21页	399K
描述
Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover

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技术参数
数据手册

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MAX1774 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QFN	包装说明：	7 X 7 MM, 0.90 MM HEIGHT, QFN-32
针数：	32	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.8	Is Samacsys：	N
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	28 V	最小输入电压：	2.7 V
标称输入电压：	12 V	JESD-30 代码：	S-CQCC-N32
JESD-609代码：	e0	长度：	7 mm
湿度敏感等级：	1	功能数量：	2
端子数量：	32	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出电流：	3 A
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	VQCCN
封装形状：	SQUARE	封装形式：	CHIP CARRIER, VERY THIN PROFILE
峰值回流温度（摄氏度）：	240	认证状态：	Not Qualified
座面最大高度：	1 mm	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	1250 kHz
技术：	BICMOS	温度等级：	INDUSTRIAL
端子面层：	TIN LEAD	端子形式：	NO LEAD
端子节距：	0.65 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	7 mm
Base Number Matches：	1

MAX1774 数据手册

19-1810; Rev 1; 1/02

Du a l, Hig h -Effic ie n c y, S t e p -Do w n

Co n ve rt e r w it h Ba c k u p Ba t t e ry S w it c h o ve r

Ge n e ra l De s c rip t io n

Fe a t u re s

The MAX1774 is a complete power-supply solution for

PDAs and other hand-held devices. It integrates two

high-efficiency step-down converters, a boost converter

for backup battery regulation, and four voltage detec-

tors in a small 32-pin QFN or 28-pin QSOP package.

♦ Dual, High-Efficiency, Synchronous-Rectified

Step-Down Converters

♦ Thin, Small (1mm High) QFN Package

♦ Step-Up Converter for Backup Battery

The MAX1774 accepts inputs from +2.7V to +28V and

provides an adjustable main output from 1.25V to 5.5V

at over 2A. The secondary core converter delivers an

adjustable voltage from 1V to 5V and can deliver up to

1.5A. Both the main and core regulators have separate

shutdown inputs.

♦ Main Power

Adjustable from +1.25V to +5.5V

Over 2A Load Current

Up to 95% Efficiency

♦ Core Power

When the AC adapter power is removed, an external P-

channel MOSFET switches input to the main battery.

When the main battery is low, the backup step-up con-

verter sustains the main output voltage. When the back-

up battery can no longer deliver the required load, the

system shuts down safely to prevent damage. Four on-

board voltage detectors monitor the status of the AC

adapter power, main battery, and backup battery.

Adjustable from 1V to 5V

Internal Switches

Up to 1.5A Load Current

Up to 91% Efficiency

♦ Automatic Main Battery Switchover

♦ 100% (max) Duty Cycle

The MAX1774 evaluation kit is available to help reduce

design time.

♦ Up to 1.25MHz Switching Frequency

♦ Input Voltage Range from +2.7V to +28V

♦ Four Low-Voltage Detectors

♦ 170µA Quiescent Current

________________________Ap p lic a t io n s

Hand-Held Computers

PDAs

Internet Access Tablets

POS Terminals

Subnotebooks

♦ 8µA Shutdown Current

♦ Digital Soft-Start

♦ Independent Shutdown Inputs

P in Co n fig u ra t io n s

Ord e rin g In fo rm a t io n

TOP VIEW

PART

MAX1774EEI

MAX1774EMJ

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

28 QSOP

GND

32 7mm x 7mm QFN

MDRV

24 ACO

23 INC

22 GND

21 FBC

20 CS-

19 CS+

18 FBM

17 N.C.

Fu n c t io n a l Dia g ra m

PGNDC

PGND

NDRV

CVL

ADAPTER

MAIN (+3.3V)

MAX1774

CORE (+1.8V)

MAIN

BATTERY

MAX1774

AC OK

PDRV

CVH

LOW MAIN BATTERY

DEAD MAIN BATTERY

BACKUP

BATTERY

GND

Pin Configurations continued at end of data sheet.

32 7mm x 7mm QFN

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...21

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与MAX1774相关器件

型号	品牌	获取价格	描述	数据表
MAX1774EEI	MAXIM	获取价格	Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover
MAX1774EEI+	MAXIM	获取价格	Switching Controller, Voltage-mode, 3A, 1250kHz Switching Freq-Max, BICMOS, PDSO28, 0.150
MAX1774EEI+T	MAXIM	获取价格	Switching Controller, Voltage-mode, 3A, 1250kHz Switching Freq-Max, BICMOS, PDSO28, 0.150
MAX1774EEI-T	MAXIM	获取价格	暂无描述
MAX1774EMJ	MAXIM	获取价格	Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover
MAX1774EVKIT	MAXIM	获取价格	265ksps.+3V.6-/2-Channel.12-Bit ADCs with +2.5V Reference and Parallel Interface[MAX1295/M
MAX1775	MAXIM	获取价格	Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers
MAX1775	ADI	获取价格	双输出、降压型DC-DC转换器，用于PDA/掌上电脑
MAX1775_09	MAXIM	获取价格	Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers
MAX1775EEE	MAXIM	获取价格	Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers

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