LT1946 LINER [Linear Technology], LT1946 Datasheet - Page 3

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

TYPICAL PERFOR A CE CHARACTERISTICS
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
0.35
0.30
0.20
0.15
0.10
0.25
0.05
0
– 50
0
Feedback Pin Voltage
Switch Saturation Voltage
– 25
0.2
0.4
SWITCH CURRENT (A)
0
TEMPERATURE ( C)
0.6
25
0.8
50
1.0
75
1.2
W
100
1.4
1946 G01
1946 G04
U
125
1.6
1400
1200
1000
800
600
400
200
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.0
2.2
0
–50
0
Oscillator Frequency
Quiescent Current
T
A
–25
0.2
= –30 C
FEEDBACK VOLTAGE (V)
0
TEMPERATURE ( C)
0.4
25
0.6
50
T
T
A
A
= 100 C
= 25 C
0.8
75
1.0
100
1946 G05
1946 G02
125
1.2
AC COUPLED
AC COUPLED
20mV/DIV
0.5A/DIV
5V/DIV
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
V
V
0
OUT
SW
0V
–50
I
LI
Current Limit
Switching Waveforms
for Figure 1 Circuit
–25
0
TEMPERATURE ( C)
25
0.5 s/DIV
50
LT1946
75
sn1946 1946fs
100
1946 G03
3
1946 G06
125