lt3430-1 Linear Technology Corporation, lt3430-1 Datasheet - Page 5

• Manufacturer Part Number: lt3430-1
• Description: High Voltage, 3a, 100khz Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
230
220
210
200
190
180
170
–50
Switching Frequency
–25
JUNCTION TEMPERATURE (°C)
2.1
1.9
1.5
1.3
1.1
0.9
0.7
1.7
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
0
–50
–50
V
Switch Peak Current Limit
C
25
Pin Shutdown Threshold
–25
–25
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
50
0
0
75
25
25
(LT3430)
100
50
3430 G10
50
125
75
75
100
100
3430 G13
3430 G16
7.5
7.0
6.5
6.0
5.5
5.0
125
125
0
Minimum Input Voltage with
5V Output
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
LOAD CURRENT (A)
MINIMUM INPUT
VOLTAGE TO START
MINIMUM INPUT
VOLTAGE TO RUN
600
500
200
400
300
100
450
400
350
300
250
200
150
100
50
0
0
–50
0
Switch Voltage Drop
Switch Minimum ON Time
vs Temperature
T
–25
A
= 25°C
JUNCTION TEMPERATURE (°C)
3430 G11
SWITCH CURRENT (A)
0
1
25
T
J
= 25°C
50
90
80
70
60
50
40
30
20
10
LT3430/LT3430-1
0
0
BOOST Pin Current
T
T
2
T
J
75
J
A
= –40°C
= 125°C
= 25°C
100
3430 G15
3430 G14
SWITCH CURRENT (A)
125
1
3
2
3430 G12
34301fa
5
3