LT3437 LINER [Linear Technology], LT3437 Datasheet - Page 5

• Manufacturer Part Number: LT3437
• Description: High Voltage 500mA, 200kHz Step-Down Switching Regulator with 100uA Quiescent Current
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
200
180
160
140
120
100
500
450
400
350
300
250
200
150
100
35
30
25
20
15
80
60
10
40
20
50
5
0
0
0
–50
0
0
Supply Current vs Input Voltage
Minimum On-Time
Soft-Start Current Threshold
vs FB Voltage
–25
10
0.2
20
0
INPUT VOLTAGE (V)
TEMPERATURE (°C)
0.4
FB VOLTAGE (V)
30
25
SOFT-START DEFEATED
0.6
40
50
50
0.8
75
V
W
60
OUT
1.0
100
= 3.3V
70
3437 G10
3437 F13
3437 G16
U
125
1.2
80
250
200
150
100
6.0
5.5
5.0
4.0
7.5
7.0
6.5
4.5
3.5
3.0
50
12
11
10
0
9
6
8
7
100
Boost Current vs Load Current
0
Oscillator Frequency
vs FB Voltage
0
Minimum Input Voltage
0.25
100
200
LOAD CURRENT (mA)
LOAD CURRENT (mA)
FB VOLTAGE (V)
3.3V TO START
0.50
5V TO START
3.3V TO RUN
200
5V TO RUN
300
0.75
300
400
1.00
400
3437 G14
3437 G11
3437 G17
1.25
500
500
600
500
400
300
200
100
200
180
160
140
120
100
2.5
2.0
1.0
4.0
3.5
3.0
1.5
0.5
80
60
40
20
0
0
0
100
2.0
0
Switch On Voltage (V
Dropout Operation
Burst Mode Threshold
vs Input Voltage
V
I
BOOST DIODE =
DIODES INC B1100
V
LOAD
OUT
OUT
= 3.3V
= 3.3V
10
= 250mA
2.5
200
T
J
LOAD CURRENT (mA)
= 25°C
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
ENTER
20
3.0
300
30
3.5
LT3437
CESAT
T
EXIT
J
40
= –40°C
400
T
J
)
4.0
= 125°C
50
3437 G18
3437 G12
3437 G15
5
3437f
500
4.5
60