LT1376IN8 datasheet, PDF - EEWORLD Datasheet

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LT1376IN8: DescriptionConv DC-DC 5V to 25V Synchronous Step Down Single-Out 2.42V to 20.64V 1.5A 8-Pin PDIP N; CategoryPower/power management The power supply circuit; File Size482KB，28 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LT1376IN8 Overview

Conv DC-DC 5V to 25V Synchronous Step Down Single-Out 2.42V to 20.64V 1.5A 8-Pin PDIP N

LT1376IN8 Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Not Compliant
ECCN (US)	EAR99
Part Status	Unconfirmed
HTS	8542.39.00.01
SVHC	Yes
SVHC Exceeds Threshold	Yes
Type	Synchronous Step Down
Output Type	Adjustable
Switching Frequency (kHz)	560
Switching Regulator	Yes
Number of Outputs	1
Output Voltage (V)	2.42 to 20.64
Maximum Output Current (A)	1.5
Minimum Input Voltage (V)	5
Maximum Input Voltage (V)	25
Operating Supply Voltage (V)	5 to 25
Typical Switch Current (A)	2
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	125
Supplier Temperature Grade	Industrial
Pin Count	8
Standard Package Name	DIP
Supplier Package	PDIP N
Mounting	Through Hole
Package Height	3.3
Package Length	10.16(Max)
Package Width	6.48
PCB changed	8
Lead Shape	Through Hole

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LT1375/LT1376

1.5A, 500kHz Step-Down

Switching Regulators

FEATURES

■

Constant 500kHz Switching Frequency

Uses All Surface Mount Components

Inductor Size Reduced to 5

Easily Synchronizable

Saturating Switch Design: 0.4Ω

Effective Supply Current: 2.5mA

Shutdown Current: 20µA

Cycle-by-Cycle Current Limiting

is current mode for fast transient response and good loop

stability. Both fixed output voltage and adjustable parts are

available.

A special high speed bipolar process and new design

techniques achieve high efficiency at high switching fre-

quency. Efficiency is maintained over a wide output cur-

rent range by using the output to bias the circuitry and by

utilizing a supply boost capacitor to saturate the power

switch. A shutdown signal will reduce supply current to

20µA on both parts. The LT1375 can be externally syn-

chronized from 580kHz to 900kHz with logic level inputs.

The LT1375/LT1376 fit into standard 8-pin PDIP and SO

packages, as well as a fused lead 16-pin SO with much

lower thermal resistance. Full cycle-by-cycle short-cir-

cuit protection and thermal shutdown are provided.

Standard surface mount external parts are used, includ-

ing the inductor and capacitors.

For low input voltage applications with 3.3V output, see

LT1507. This is a functionally identical part that can

operate with input voltages between 4.5V and 12V.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

APPLICATIO S

■

Portable Computers

Battery-Powered Systems

Battery Charger

Distributed Power

DESCRIPTIO

The LT

1375/LT1376 are 500kHz monolithic buck mode

switching regulators. A 1.5A switch is included on the die

along with all the necessary oscillator, control and logic

circuitry. High switching frequency allows a considerable

reduction in the size of external components. The topology

TYPICAL APPLICATIO

5V Buck Converter

1N914

0.1µF

LT1376-5 BIAS

L1**

5µH

†

TO 25V

C3*

10µF TO

50µF

DEFAULT

= ON

EFFICIENCY (%)

INPUT

BOOST

SHDN

GND

* RIPPLE CURRENT

≥

OUT

** INCREASE L1 TO 10µH FOR LOAD CURRENTS ABOVE 0.6A AND TO 20µH ABOVE 1A

†

FOR INPUT VOLTAGE BELOW 7.5V, SOME RESTRICTIONS MAY APPLY.

SEE APPLICATIONS INFORMATION.

Efficiency vs Load Current

100

OUT

= 5V

= 10V

L = 10µH

OUTPUT**

5V, 1.25A

3.3nF

1N5818

100µF, 10V

SOLID

TANTALUM

1375/76 TA01

0.25

0.75

1.00

0.50

LOAD CURRENT (A)

1.25

1375/76 TA02

13756fd

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