LT1074I Datasheet, PDF (16/16 Pages) Linear Technology – Step-Down Switching Regulator

LT1074/LT1076
TYPICAL APPLICATIO
Negative Boost Converter
V_{IN VFB}
LT1074
C3 +
GND
V_C ^VSW
200µF
15V
C2
0.01µF
1nF
R3
750Ω
V_IN
–5V TO –15V
* MBR735
** I_OUT (MAX) = 1A TO 3A DEPENDING
ON INPUT VOLTAGE. SEE AN44
100pF
R1
12.7k
L1
25µH
R2
2.21k
+ C1
1000µF
D1*
25V
V_OUT
–15V**
+
100µF
5µH
OPTIONAL OUTPUT FILTER
LT1074 • TA04
PACKAGE DESCRIPTIO
0.390 – 0.415
(9.906 – 10.541)
0.460 – 0.500
(11.684 – 12.700)
T7 Package
7-Lead Plastic TO-220 (Standard)
(Reference LTC DWG # 05-08-1422)
0.147 – 0.155
(3.734 – 3.937)
DIA
0.165 – 0.180
(4.191 – 4.572)
0.230 – 0.270
(5.842 – 6.858)
0.570 – 0.620
(14.478 – 15.748)
0.330 – 0.370
(8.382 – 9.398)
0.620
(15.75)
TYP
0.700 – 0.728
(17.780 – 18.491)
0.045 – 0.055
(1.143 – 1.397)
0.050
BSC _(1.27)
0.026 – 0.036
(0.660 – 0.914)
SEATING PLANE
0.152 – 0.202
0.260 – 0.320 (3.860 – 5.130)
(6.604 – 8.128)
0.135 – 0.165
(3.429 – 4.191)
0.095 – 0.115
(2.413 – 2.921)
0.155 – 0.195*
(3.937 – 4.953)
0.013 – 0.023
(0.330 – 0.584)
*MEASURED AT THE SEATING PLANE
T7 (TO-220) 0399
RELATED PARTS
PART NUMBER
LT1375/LT1376
LT1374/LT1374HV
LT1370
LT1676
LT1339
LT1765
DESCRIPTION
1.5A, 500kHz Step-Down Switching Regulators
4.5A, 500kHz Step-Down Switching Regulators
6A, 500kHz High Efficiency Switching Regulator
Wide Input Range, High Efficiency Step-Down Regulator
High Power Synchronous DC/DC Controller
3A, 1.25MHz, Step-Down Regulator
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
V_IN Up to 25V, I_OUT Up to 1.25A, SO-8
V_IN Up to 25V (32V for HV), I_OUT Up to 4.25A, SO-8/DD
6A/42V Internal Switch, 7-Lead DD/TO-220
V_IN from 7.4V to 60V, I_OUT Up to 0.5A, SO-8
V_IN Up to 60V, I_OUT Up to 50A, Current Mode
V_IN = 3V to 25V, V_µF =1.2V, TSSOP-16E, SO8 Package
sn1074 1074fds
LT/CPI 0202 1.5K REV D • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1994