LT3437 LINER [Linear Technology], LT3437 Datasheet - Page 6

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

LT3437
TYPICAL PERFOR A CE CHARACTERISTICS
6
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
6
5
3
2
4
1
0
–50
2.0
Maximum Sync Frequency
vs Temperature
Dropout Operation
V
I
BOOST DIODE = DIODES INC B1100
LOAD
OUT
–25
2.5
= 5V
= 250mA
3.0
0
TEMPERATURE (°C)
INPUT VOLTAGE (V)
100mA/DIV
50mV/DIV
3.5
25
V
I
OUT
OUT
4.0
50
Step Response
LOAD STEP 0mA TO 200mA
4.5
75
V
V
I
OUT
IN
OUT
5.0
W
= 12V
= 100mA
= 3.3V
100
5.5
3437 G19
3437 G22
U
125
1ms/DIV
6.0
AC COUPLED
100mA/DIV
20mV/DIV
V
94.5
94.0
93.5
93.0
92.5
92.0
91.5
OUT
I
SW
–50
Maximum Duty Cycle
vs Temperature
V
V
I
Burst Mode Operation
Q
I
IN
OUT
LOAD
= 100µA
= 12V
–25
3437 G25
= 3.3V
= 250mA
0
TEMPERATURE (°C)
25
10µs/DIV
50
75
100mA/DIV
50mV/DIV
100
V
I
OUT
OUT
3437 G23
3437 G20
Step Response
125
LOAD STEP 100mA TO 300mA
AC COUPLED
100mA/DIV
20mV/DIV
V
OUT
I
0.6
0.5
0.4
0.3
0.2
0.1
SW
0
–50
Burst Mode Defeated
V
vs Temperature
1ms/DIV
V
V
I
V
Q
IN
OUT
SYNC
C
= 1.7mA
= 12V
Switching Threshold
–25
= 3.3V
= 3.3V
0
TEMPERATURE (°C)
25
10µs/DIV
3437 G26
50
75
100
3437 G24
3437 G21
3437f
125