LT1936 Linear Technology, LT1936 Datasheet - Page 17

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

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