Rainbow Electronics MAX8737 - Manual (Page 5)

MAX8737
Dual, Low-Voltage Linear Regulator Controllers
with External MOSFETs
_______________________________________________________________________________________ 5
100 µs/div
SOFT-STOP
(EN FALLING EDGE)
5V
3V
C
A
D
MAX8737 toc04
0
0
0
0
1.5V
5V
A. EN1, 5V/div
B. DRV1, 2V/div
NO LOAD C. LDO1 OUTPUT, 1V/div
D. PGOOD1, 5V/div
B
2ms/div
SOFT-START
(UVLO RISING EDGE)
5V
3V
C
A
D
MAX8737 toc05
0
0
0
0
1.5V
5V
A. 5V BIAS (V CC ), 5V/div
B. DRV1, 2V/div
NO LOAD, EN = V
CC
C. LDO1 OUTPUT, 1V/div
D. PGOOD1, 5V/div
B
2ms/div
SOFT-STOP
(UVLO FALLING EDGE)
5V
3V
C
A
D
MAX8737 toc06
0
0
0
0
1.5V
5V
A. 5V BIAS (V CC ), 5V/div
B. DRV1, 2V/div
NO LOAD, EN = V
CC
C. LDO1 OUTPUT, 1V/div
D. PGOOD1, 5V/div
B
10 µs/div
LOAD TRANSIENT
(0.1A TO 2.1A)
0
0.1A
C
A
D
MAX8737 toc07
1.50V
1.49V
2.1A
3.2V
2.8V
A. CONTROL SIGNAL
B. LOAD CURRENT, 2A/div C. DRV1, 500mV/div
D. LDO1 OUTPUT VOLTAGE,
10mV/div
B
1.51V
10 µs/div
LOAD TRANSIENT
(NO LOAD TO 2A)
0
0
C
A
D
MAX8737 toc08
1.50V
1.45V
2A
3.2V
2.7V
A. CONTROL SIGNAL
B. LOAD CURRENT, 2A/div C. DRV1, 1V/div
D. LDO1 OUTPUT VOLTAGE,
50mV/div
B
1.7V
2 µs/div
LOAD TRANSIENT
(NO LOAD TO 2A)
0
0
C
A
D
MAX8737 toc09
1.50V
1.45V
2A
3.2V
2.7V
A. CONTROL SIGNAL
B. LOAD CURRENT, 2A/div C. DRV1, 1V/div
D. LDO1 OUTPUT VOLTAGE,
50mV/div
B
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)