Datasheet > 电源电路 > 开关式稳压器或控制器> IMP38C44/D

IMP38C44/D

更新时间： 2024-11-08 05:39:15

品牌	Logo	应用领域
A1PROS		/
页数	文件大小	规格书
10页	161K
描述
BiiCMOS Currentt--Mode BiiCMOS Currentt--Mode

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中文翻译

获取价格

数据手册

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IMP38C44/D 数据手册

IMP38C/HC/42/3/4/5

OWER

ANAGEMENT

Key Features

BiCMOS Current-Mode

PWM Controllers

ꢀ

384x Series Pinout with BiCMOS Technology

Zero Cross-Conduction Current by Design

1MHz Operation

65ns Maximum Current-Sense Delay

120µA Maximum Start-Up Current

1.5mA Maximum Operating Current

High Output Current Drive

– 1.0A, IMP38HC4x

– 0.5A, IMP38C4x

20V Maximum Supply Voltage

2.5V, 1%, Trimmed Error Amplifier Reference

Trimmed Oscillator Discharge Current

Pin-for-Pin Enhanced Replacements for Micrel

MIC38C/HC4x and GMT38C4x/HC4x

– 1MHz Operation

– No Cross-Conduction Current

– 50ns Current-Sense Delay

The IMP38C4x and IMP38HC4x are fixed frequency, high performance,

current-mode PWM controllers that are pin compatible with bipolar 384x

devices but feature improvements resulting from IMP’s BiCMOS

processing and circuit design. Notable among the improvements are zero

cross-conduction/shoot-through current, reduced start-up and operating

current, lower current-sense delay, higher frequency operation, full

supply voltage swing at the output and a 1% trimmed voltage reference.

ꢀ

IMP38C4x and IMP38HC4x output driver stage has zero cross-conduction

current. A proprietary output state-machine monitors each output

MOSFET and guarantees by design zero cross-conduction current. This is

an industry first for 384x PWM devices.

Under-voltage lockout (UVL) performance has been improved. When

the power supply voltage is below the startup voltage, internal circuitry

puts the output into a low impedance state. The output will sink 20mA

and remain below 1.3V, well below the turn-on threshold voltage of the

external MOSFET. Even when V_DDdrops to zero volts, the out pin will

not rise above approximately 1.3V because the output UVLO circuit is

Block Diagrams

7 (12)

V_DD

(11)

V_D

8 (14)

V_REF

UVLO

Reference

–

4 (7)

1 (1)

2 (3)

6 (10)

OUT

RTCT

COMP

Oscillator

–

COMP

–

2.5V

Ref

(8)

PGND

Connection Notes

3 (5)

(

) Pins Are 14-Pin Devices Only

IMP38C4X, IMP38HC4X (8-Pin Devices)

50% Maximum Duty Cycle:

IMP38C44, IMP38HC44, IMP38C45, IMP38HC45

GND 5 ISNS

AGND (9)

96% Maximum Duty Cycle:

IMP38C42, IMP38HC42, IMP38C43, IMP38HC43

38C/HC_01.eps

408-432-9100/www.impweb.com

12 3 4 5 6 7...10

中文翻译

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与IMP38C44/D相关器件

型号	品牌	获取价格	描述	数据表
IMP38C44EMA	A1PROS	获取价格	BiiCMOS Currentt--Mode BiiCMOS Currentt--Mode
IMP38C44EMA	IMP	获取价格	BiCMOS Current-Mode PWM Controllers
IMP38C44EMA/T	A1PROS	获取价格	Switching Regulator/Controller, Current-mode, 0.5A, BICMOS, PDSO8
IMP38C44EPA	A1PROS	获取价格	BiiCMOS Currentt--Mode BiiCMOS Currentt--Mode
IMP38C44EPA	IMP	获取价格	BiCMOS Current-Mode PWM Controllers
IMP38C44EPD	IMP	获取价格	BiCMOS Current-Mode PWM Controllers
IMP38C44EPD	A1PROS	获取价格	BiiCMOS Currentt--Mode BiiCMOS Currentt--Mode
IMP38C44ESA	A1PROS	获取价格	BiiCMOS Currentt--Mode BiiCMOS Currentt--Mode
IMP38C44ESA	IMP	获取价格	BiCMOS Current-Mode PWM Controllers
IMP38C44ESA/T	A1PROS	获取价格	Switching Regulator/Controller, Current-mode, 0.5A, BICMOS, PDSO8

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