LT1376HVIS8#TRPBF datasheet, PDF

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LT1376HVIS8#TRPBF: DescriptionIC REG BUCK SEPIC ADJ 1.5A 8SOIC; CategoryPower/power management The power supply circuit; File Size506KB，28 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LT1376HVIS8#TRPBF Overview

IC REG BUCK SEPIC ADJ 1.5A 8SOIC

LT1376HVIS8#TRPBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	SOIC
package instruction	SOP, SOP8,.25
Contacts	8
Manufacturer packaging code	S8
Reach Compliance Code	compliant
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Maximum input voltage	30 V
Minimum input voltage	5 V
Nominal input voltage	15 V
JESD-30 code	R-PDSO-G8
JESD-609 code	e3
length	4.9025 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	8
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Maximum output current	3 A
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP8,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.752 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	570 kHz
technology	BIPOLAR
Temperature level	AUTOMOTIVE
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	3.899 mm

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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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