LT1072CS8#TR Linear Technology, LT1072CS8#TR Datasheet - Page 12

• Manufacturer Part Number: LT1072CS8#TR
• Description: IC SW REG 1.25A HI-EFF 8-SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Cuk, Flyback, Forward Converterr

Specifications of LT1072CS8#TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 40 V
• Current - Output: 1.25A
• Frequency - Switching: 40kHz
• Voltage - Input: 3 ~ 60 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LT1072CS8TR

LT1072
TYPICAL APPLICATIO S
12
V
25µF
IN
C5*
+
OPTIONAL
FILTER
INPUT
–20V
2.2µF
L3
V
U
IN
C3
25µF*
+
C3
D3
+
10 TO 20V
(for Offline Applications, See AN-25)
GND
**
LT1072
**
*
Driving High Voltage FET
GND
V
*
REQUIRED IF INPUT LEADS ≥ 2"
PULSE ENGINEERING 52626
Negative Buck Converter
IN
1µF
REQUIRED IF INPUT LEADS ≥ 2"
PULSE ENGINEERING 52626
+
Positive Buck Converter
C1
LT1072
V
V
IN
C
V
R3
470Ω
SW
FB
D1
V
C
V
R3
LT1072
SW
C1
FB
GND
V
D1
r
IN
1.24k
R2
R2
1.24k
V
220µH
SW
L1**
500µF
3.74k
1µF
C2
R1
C2
+
2N3906
+
Q1
D1
G
220µH
500µF
LT1072 • TA10
L1**
R1
4.64k
C4
OPTIONAL
OPTIONAL
1N914
Q1
OUTPUT
OUTPUT
FILTER
D2
FILTER
+
D
4µH
L2
4µH
LOAD
L2
+
–5.2V AT 1A
R4
10Ω
100mA
MINIMUM
C4
200µF
LT1072 • TA11
5V, 1A
C5
200µF
LT1072 • TA12
1072fc