L4973V-5.1 STMicroelectronics, L4973V-5.1 Datasheet

no-image

L4973V-5.1

Manufacturer Part Number

L4973V-5.1

Description

Manufacturer

STMicroelectronics

Datasheet

1.L4973V-5.1.pdf (27 pages)

Specifications of L4973V-5.1

Case

DIP

Date_code

01+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

BOSTOCK HK LIMITED

Part Number:

L4973V-5.1

Manufacturer:

ST

0

Current page: 1 of 27
Download datasheet (352Kb)

General features

■

■

■

■

■

■

■

■

■

■

■

■

■

■

Internal schematic diagram

December 2006

Up to 3.5A step down converter

Operating input voltage from 8V to 55V

3.3V and 5.1V (±1%) fixed output, and

adjustable outputs from:

– 0.5V to 50V (3.3 type)

– 5.1V to 50V (5.1 type)

Frequency adjustable up to 300kHz

Voltage feed forward

Zero load current operation (min 1mA)

Internal current limiting (pulse by pulse and

HICCUP mode)

Precise 5.1V (1.5%) reference voltage

externally available

Input/output synchronization function

Inhibit for zero current consumption (100mA

typ. at V

Protection against feedback disconnection

Thermal shutdown

Output overvoltage protection

Soft start function

CC

= 24V)

V

CC

C

(8V to 55V)

IN

R

C2

OSC

C

OSC

13,14,15

7

1

4,5,6,10

Rev 16

8

3.5A step down switching regulator

L4973

16

Description

The L4973 is a step down monolithic power

switching regulator delivering 3.5A at fixed

voltages of 3.3V or 5.1V and using a simple

external divider output adjustable voltage up to

50V. Realized in BCD mixed technology, the

device uses an internal power D-MOS transistor

(with a typical R

high efficiency and very fast switching times.

Switching frequency up to 300KHz are achievable

(the maximum power dissipation of the packages

must be observed).

A wide input voltage range between 8V to 55V

and output voltages regulated from 3.3V to 40V

cover the majority of the today applications.

Features of this new generation of DC-DC

converter includes pulse by pulse current limit,

hiccup mode for output short circuit protection,

voltage feed forward regulation, soft start,

input/output synchronization, protection against

feedback loop disconnection, inhibit for zero

current consumption and thermal shutdown.

Packages available are in plastic dual in line, DIP-

18 (12+3+3) for standard assembly, and SO20

(12+4+4) for SMD assembly.

17

D97IN554A

C

SS

12

11

DIP-18 (12+3+3)

9

3

2

R

C

COMP

COMP

C

BOOT

DS(on)

D1

L1

of 0.15Ω) to obtain very

V

O

C

(3.3V or 5.1V)

OUT

SO-20 (12+4+4)

L4973

www.st.com

1/27

27

Related parts for L4973V-5.1

Related keywords

L4973V-5.1 datasheet
L4973V-5.1 data sheet
L4973V-5.1 pdf datasheet
L4973V-5.1 component
L4973V-5.1 part
L4973V-5.1 distributor
L4973V-5.1 RoHS
L4973V-5.1 datasheet download