LT1270CT#PBF Linear Technology, LT1270CT#PBF Datasheet - Page 4

• Manufacturer Part Number: LT1270CT#PBF
• Description: IC SW-REG 8A HI-EFF TO220-5
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Flybackr

Specifications of LT1270CT#PBF

• Synchronous Rectifier: No
• Number Of Outputs: 1
• Current - Output: 8A
• Frequency - Switching: 60kHz
• Voltage - Input: 3.5 ~ 30 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-5 (Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Power - Output: -
• Internal Switch(s): -

PACKAGE DESCRIPTIO
TYPICAL APPLICATIO S
LT1270A/LT1270
RELATED PARTS
PART NUMBER
LT1074/HV
LTC3414
LT3430/LT3431
4
–12V
V
IN
OPTIONAL
FILTER
INPUT
L3
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
Negative-to-Positive Buck-Boost Converter
+
(9.906 – 10.541)
(11.684 – 12.700)
C4
200 F*
.390 – .415
DESCRIPTION
4.4A (I
DC/DC Converter
4A (I
DC/DC Converter
60V, 2.75A (I
Step-Down DC/DC Converter
.460 – .500
**PULSE ENGINEERING #PE-92116
BSC
*REQUIRED IF INPUT LEADS 2"
OUT
(1.70)
.067
GND
OUT
), 4MHz, Synchronous Step-Down
LT1270
), 100kHz, High Efficiency Step-Down
V
IN
OUT
V
55 H**
C
V
R3
2.2k
SW
), 200/500kHz, High Efficiency
L1
FB
C1
0.22 F
LT1270 • TA06
U
1.24k
D1
(0.711 – 0.965)
U
.028 – .038
www.linear.com
(8.382 – 9.398)
(5.842 – 6.858)
OPTIONAL
.230 – .270
.330 – .370
OUTPUT
+
FILTER
C2
2000 F
L2
(3.734 – 3.937)
5-Lead Plastic TO-220 (Standard)
.147 – .155
(Reference LTC DWG # 05-08-1421)
(14.478 – 15.748)
DIA
.570 – .620
C3
R1
11.3k
V
12V, 3A
OUT
T Package
(6.60 – 8.13)
.260 – .320
–20V
V
SEATING PLANE
IN
INPUT FILTER
OPTIONAL
(3.861 – 5.131)
COMMENTS
V
DD-5/7, TO220-5/7
V
TSSOP20E
V
TSSOP16E
10 H
.152 – .202
L3
IN
IN
IN
: 7.3V to 45/64V, V
: 2.3V to 5.5V, V
: 5.5V to 60V, V
(17.78 – 18.491)
(3.429 – 4.191)
.700 – .728
.135 – .165
+
(4.191 – 4.572)
.165 – .180
C3
100 F*
(15.75)
**PULSE ENGINEERING #PE-92115
.620
TYP
Negative Buck Converter
*REQUIRED IF INPUT LEADS 2"
OUT
OUT
GND
OUT
(min) = 1.2V, I
(min) = 0.8V, I
LT1270
V
* MEASURED AT THE SEATING PLANE
(min) = 2.21V, I
IN
V
C
V
R3
SW
(2.413 – 2.921)
(3.937 – 4.953)
(0.330 – 0.584)
FB
C1
.155 – .195*
.095 – .115
LT1270 • TA07
.013 – .023
(1.143 – 1.397)
LINEAR TECHNOLOGY CORPORATION 1992
.045 – .055
LT/TP 1203 1K REV C • PRINTED IN USA
Q
Q
100 H**
D1
R2
1.24k
= 2.5mA, I
= 64 A, I
L1
Q
= 8.5mA, I
T5 (TO-220) 0801
+
C2
1000 F
SD
SD
OPTIONAL
<1 A,
OUTPUT
= 30 A,
FILTER
SD
R1
4.64k
4 F
L2
LOAD
= 10 A,
12k
+
–5.2V, 7.5A
1270afc
C4
200 F