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LT1076HVIT#06PBF

Description
IC REG MULT CONFIG INV ADJ TO220
Categorysemiconductor    Power management   
File Size178KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LT1076HVIT#06PBF Overview

IC REG MULT CONFIG INV ADJ TO220

LT1076HVIT#06PBF Parametric

Parameter NameAttribute value
FunctionBoost, Buck, Boost/Buck
Output configurationpositive or negative
TopologyBuck, boost, flyback
Output typeAdjustable
Number of outputs1
Voltage - Input (minimum)8V
Voltage - input (maximum)64V
Voltage - Output (minimum/fixed)2.5V
Voltage - Output (maximum)35V
Current - Output2A (switch)
Frequency - Switch100kHz
Synchronous rectifiernone
Operating temperature-40°C ~ 85°C(TA)
Installation typeThrough hole
Package/casingTO-220-5
Supplier device packagingTO-220-5 Flow 6
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**
50
µ
H (LT1074)
100
µ
H (LT1076)
10V TO 40V
V
IN
LT1074
FB
R3
2.7k
C3
200
µ
F
C2
0.01
µ
F
V
SW
MBR745*
R1
2.8k
1%
R2
2.21k
1%
+
100
EFFICIENCY (%)
GND
V
C
+
U
U
U
Buck Converter Efficiency
LT1074
5V
5A
90
80
V
OUT
= 12V, V
IN
= 20V
C1
500
µ
F
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
I
OUT
/2
V
OUT
= 5V, V
IN
= 15V
70
60
50
0
1
2
3
4
5
6
OUTPUT LOAD CURRENT (A)
L = 50µH TYPE 52 CORE
DIODE = MBR735
LT1074•TA01
LT1074•TPC27
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