LT1074HVCT#06PBF datasheet, PDF

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LT1074HVCT#06PBF: DescriptionIC REG MULT CONFIG INV ADJ TO220; CategoryPower/power management The power supply circuit; File Size178KB，16 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LT1074HVCT#06PBF Overview

IC REG MULT CONFIG INV ADJ TO220

LT1074HVCT#06PBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	TO-220
package instruction	LEAD FREE, PLASTIC, TO-220, 5 PIN
Contacts	5
Manufacturer packaging code	T
Reach Compliance Code	not_compliant
ECCN code	EAR99
Other features	ALSO OPERATES WITH ADJUSTABLE MODE FROM 2.5 TO 50V
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	60 V
Minimum input voltage	8 V
Nominal input voltage	25 V
JESD-30 code	R-PZFM-T5
JESD-609 code	e3
Number of functions	1
Number of terminals	5
Maximum operating temperature	70 °C
Minimum operating temperature
Maximum output current	8.5 A
Package body material	PLASTIC/EPOXY
encapsulated code	ZIP
Encapsulate equivalent code	ZIP5,.15,.2,67TB
Package shape	RECTANGULAR
Package form	FLANGE MOUNT
Peak Reflow Temperature (Celsius)	250
Certification status	Not Qualified
surface mount	NO
Switch configuration	BUCK
Maximum switching frequency	125 kHz
technology	BIPOLAR
Temperature level	COMMERCIAL
Terminal surface	Matte Tin (Sn) - with Nickel (Ni) barrier
Terminal form	THROUGH-HOLE
Terminal pitch	1.7 mm
Terminal location	ZIG-ZAG
Maximum time at peak reflow temperature	40

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LT1074/LT1076

Step-Down Switching

Regulator

FEATURES

■

5A Onboard Switch (LT1074)

Operates Up to 60V Input

100kHz Switching Frequency

Greatly Improved Dynamic Behavior

Available in Low Cost 5 and 7-Lead Packages

Only 8.5mA Quiescent Current

Programmable Current Limit

Micropower Shutdown Mode

ponents, are included on the chip. The topology is a classic

positive “buck” configuration but several design innova-

tions allow this device to be used as a positive-to-negative

converter, a negative boost converter, and as a flyback

converter. The switch output is specified to swing 40V

below ground, allowing the LT1074 to drive a tapped-

inductor in the buck mode with output currents up to 10A.

The LT1074 uses a true analog multiplier in the feedback

loop. This makes the device respond nearly instanta-

neously to input voltage fluctuations and makes loop gain

independent of input voltage. As a result, dynamic behav-

ior of the regulator is significantly improved over previous

designs.

On-chip pulse by pulse current limiting makes the LT1074

nearly bust-proof for output overloads or shorts. The input

voltage range as a buck converter is 8V to 60V, but a self-

boot feature allows input voltages as low as 5V in the

inverting and boost configurations.

The LT1074 is available in low cost TO-220 or DD packages

with frequency pre-set at 100kHz and current limit at 6.5A

(LT1076 = 2.6A). A 7-pin TO-220 package is also available

which allows current limit to be adjusted down to zero. In

addition, full micropower shutdown can be programmed.

See Application Note 44 for design details.

A fixed 5V output, 2A version is also available. See LT1076-5.

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

APPLICATIO S

■

Buck Converter with Output Voltage Range of 2.5V

to 50V

Tapped-Inductor Buck Converter with 10A Output

at 5V

Positive-to-Negative Converter

Negative Boost Converter

Multiple Output Buck Converter

DESCRIPTIO

The LT

1074 is a 5A (LT1076 is rated at 2A) monolithic

bipolar switching regulator which requires only a few

external parts for normal operation. The power switch, all

oscillator and control circuitry, and all current limit com-

TYPICAL APPLICATIO

Basic Positive Buck Converter

L1**

H (LT1074)

100

H (LT1076)

10V TO 40V

LT1074

2.7k

†

200

0.01

MBR745*

2.8k

2.21k

100

EFFICIENCY (%)

GND

Buck Converter Efficiency

LT1074

OUT

= 12V, V

= 20V

500

25V

* USE MBR340 FOR LT1076

** COILTRONICS #50-2-52 (LT1074)

#100-1-52 (LT1076)

PULSE ENGINEERING, INC.

#PE-92114 (LT1074)

#PE-92102 (LT1076)

HURRICANE #HL-AK147QQ (LT1074)

#HL-AG210LL (LT1076)

†

RIPPLE CURRENT RATING

≥

OUT

= 5V, V

= 15V

OUTPUT LOAD CURRENT (A)

L = 50µH TYPE 52 CORE

DIODE = MBR735

LT1074•TA01

LT1074•TPC27

sn1074 1074fds

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