L4972A

更新时间： 2024-11-09 22:47:23

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		开关
页数	文件大小	规格书
23页	340K
描述
2A SWITCHINGREGULATOR

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数据手册

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L4972A 数据手册

L4972A

L4972AD

2A SWITCHING REGULATOR

2A OUTPUT CURRENT

MULTIPOWER BCD TECHNOLOGY

5.1V TO 40V OUTPUT VOLTAGERANGE

0 TO 90% DUTY CYCLE RANGE

INTERNALFEED-FORWARD LINEREG.

INTERNALCURRENT LIMITING

PRECISE5.1V ± 2% ON CHIP REFERENCE

RESET AND POWER FAIL FUNCTIONS

INPUT/OUTPUT SYNC PIN

UNDER VOLTAGE LOCK OUT WITH HYS-

TERETIC TURN-ON

PWM LATCH FOR SINGLE PULSE PER PE-

RIOD

POWERDIP

SO20

(16 + 2 + 2)

VERY HIGH EFFICIENCY

SWITCHING FREQUENCY UP TO 200KHz

THERMAL SHUTDOWN

ORDERING NUMBERS : L4972A(Powerdip)

L4972AD (SO20)

CONTINUOUS MODE OPERATION

the L4972A include reset and power fail for micro-

processors, feed forward line regulation, soft start,

limiting current and thermalprotection. The device

is mountedina Powerdip16 +2 +2and SO20large

plasticpackagesand requires few externalcompo-

nents. Efficient operation at switching frequencies

up to 200KHz allows reduction in the size and cost

of externalfilter component.

DESCRIPTION

TheL4972Aisa stepdownmonolithicpowerswitch-

ingregulatordelivering2Aat avoltagevariablefrom

5.1 to 40V.

Realized with BCD mixed technology, the device

uses a DMOS output transistor to obtain very high

efficiencyandvery fastswitching times. Featuresof

BLOCK DIAGRAM

June 2000

1/23

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

12 3 4 5 6 7...23

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