LT1936 Linear Technology, LT1936 Datasheet - Page 18

• Manufacturer Part Number: LT1936
• Description: 1.4A 500kHz Step-Down Switching Regulator
• Manufacturer: Linear Technology

LT1936
TYPICAL APPLICATIONS
18
100
90
70
60
80
0
V
T
OUT
A
= 25°C
= 2.5V
Effi ciency, 2.5V Output
LOAD CURRENT (A)
0.5
V
IN
= 12V
3.6V TO 36V
V
14.5V TO 36V
IN
1.0
ON OFF
= 5V
ON OFF
V
IN
V
IN
1936 TA07b
D1: DFLS140L
D2: MBRO540
L1: TOKO D63CB
1.5
D1: MBRM140
D2: 1N4148
D3: CMDZ5235B
C1
4.7μF
C1
2.2μF
2.5V Step-Down Converter
12V Step-Down Converter
SHDN
COMP
V
SHDN
COMP
V
IN
C
LT1936
V
V
IN
C
LT1936
BOOST
GND
BOOST
GND
SW
FB
SW
FB
0.22μF
R2
10k
C3
D1
R2
20k
C3
1μF
D1
182k
5.5
5.0
4.5
4.0
3.5
3.0
6.2μH
D2
R1
11k
D2
L1
R1
1
22μH
1.8k
V
L1
T
6.8V
T
OUT
A
D3
TO RUN
TO RUN
A
= –45°C
= 25°C
Minimum Input Voltage
= 2.5V
1936 TA07a
C2
47μF
V
2.5V
1.2A
T
A
OUT
C2
22μF
1936 TA08
LOAD CURRENT (mA)
10
> 0°C
V
12V
1.2A
OUT
100
www.DataSheet4U.com
T
TO START
TO START
T
A
A
= –45°C
= 25°C
1000
1936 TA07c
1936fd