LT1946 LINER [Linear Technology], LT1946 Datasheet - Page 10

• Manufacturer Part Number: LT1946
• Description: 1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start
• Manufacturer: LINER [Linear Technology]

LT1946
TYPICAL APPLICATIO S
10
85
80
70
65
60
50
90
75
55
0
V
IN
100
= 5V
LOAD CURRENT (mA)
200
Efficiency
3.3V TO 5V
V
300
V
IN
IN
= 3.3V
U
C1: 4.7 F, X5R OR X7R, 6.3V
C2: 4.7 F, X5R OR X7R, 16V
D1: MICROSEMI UPS120 OR EQUIVALENT
L1: TDK RLF5018T-4R7M1R4
400
470pF
C1
4.7 F
33.3k
C
1946 TA02a
C
R
OFF ON
C
500
100nF
C
12V Output Boost Converter
SS
3
1
SHDN
V
V
C
SS
IN
6
8
LT1946
COMP
4.7 H
L1
7
GND
SW
FB
5
4
I
LOAD
AC COUPLED
2
100mV/DIV
D1
0.5A/DIV
175mA
100mA
V
OUT
I
LI
R1
84.5k
R2
9.76k
V
IN
= 3.3V
1946 TA02
C2
4.7 F
Transient Response
V
12V
410mA, V
275mA, V
OUT
100 s/DIV
IN
IN
= 5V
= 3.3V
1946 TA02b
sn1946 1946fs