Datasheet

LT1936
17
1936fd
TYPICAL APPLICATIONS
5V Step-Down Converter
1.8V Step-Down Converter
1.2V Step-Down Converter
Effi ciency, 1.8V Output
Effi ciency, 1.2V Output
V
IN
3.6V TO 20V
ON OFF
D1
D2
L1
4.7μH
R1
10k
D1: DFLS140L
D2: 1N4148
L1: TOKO D63CB
C2
47μF
×2
1936 TA05a
C1
4.7μF
C3
0.22μF
V
OUT
1.8V
1.3A
V
IN
BOOST
V
C
GND
COMP FB
LT1936
SHDN SW
R2
20k
LOAD CURRENT (A)
0
50
EFFICIENCY (%)
POWER LOSS (W)
60
70
80
90
0
0.5
1.0
1.5
2.0
0.5 1
1936 TA05b
1.5
POWER LOSS
V
IN
= 5V
V
IN
= 12V
V
OUT
= 1.8V
T
A
= 25°C
V
IN
3.6V TO 20V
ON OFF
D1
D2
L1
3.3μH
D1: DFLS140L
D2: 1N4148
L1: TOKO D63CB
C2
47μF
×2
1936 TA06a
C1
4.7μF
C3
0.22μF
V
OUT
1.2V
1.3A
V
IN
BOOST
V
C
GND
COMP FB
LT1936
SHDN SW
100k
LOAD CURRENT (A)
0
50
55
EFFICIENCY (%)
POWER LOSS (W)
60
65
70
75
80
0
0.5
1.0
1.5
2.0
0.5 1
1936 TA06b
1.5
POWER LOSS
V
IN
= 5V
V
IN
= 12V
V
OUT
= 1.2V
T
A
= 25°C
V
IN
6.3V TO 36V
ON OFF
D1
D2
L1
15μH
R1
31.6k
C2
22μF
1936 TA04
C1
4.7μF
C3
0.22μF
V
OUT
5V
1.2A
V
IN
BOOST
V
C
GND
COMP FB
LT1936
SHDN SW
R2
10k