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L4972AD Datasheet

  • L4972AD

  • 2A SWITCHINGREGULATOR

  • 23頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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廬
L4972A
L4972AD
2A SWITCHING REGULATOR
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2A OUTPUT CURRENT
5.1V TO 40V OUTPUT VOLTAGE RANGE
0 TO 90% DUTY CYCLE RANGE
INTERNAL FEED-FORWARD LINE REG.
INTERNAL CURRENT LIMITING
PRECISE 5.1V
鹵
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
VERY HIGH EFFICIENCY
SWITCHING FREQUENCY UP TO 200KHz
THERMAL SHUTDOWN
CONTINUOUS MODE OPERATION
MULTIPOWER BCD TECHNOLOGY
POW ERDIP
(16 + 2 + 2)
SO20
ORDERING NUMBERS :
L4972A (Powerdip)
L4972AD (SO20)
DESCRIPTION
The L4972Aisa stepdownmonolithicpower switch-
ing regulatordelivering 2A at a voltagevariable from
5.1 to 40V.
Realized with BCD mixed technology, the device
uses a DMOS output transistor to obtain very high
efficiency and very fast switching times. Features of
BLOCK DIAGRAM
the L4972A include reset and power fail for micro-
processors, feed forward line regulation, soft start,
limiting current and thermal protection. The device
is mountedin a Powerdip16 + 2 + 2 and SO20large
plastic packages and requires few external compo-
nents. Efficient operation at switching frequencies
up to 200KHz allows reduction in the size and cost
of external filter component.
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.

L4972AD 產(chǎn)品屬性

  • L4972 View All Specifications

  • 40

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • -

  • 降壓（降壓）

  • 可調(diào)式

  • 1

  • 5.1 V ~ 40 V

  • 15 V ~ 50 V

  • -

  • 100kHz

  • 2A

  • 無

  • -40°C ~ 150°C

  • 表面貼裝

  • 20-SOIC（0.295"，7.50mm 寬）

  • 管件

  • 20-SO

  • 497-4206-5497-4206-5-ND497-4207-5

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