Typical operating characteristics (continued) – Rainbow Electronics MAX1637 User Manual
Page 5
MAX1637
Miniature, Low-Voltage,
Precision Step-Down Controller
_______________________________________________________________________________________
5
10
-10
0.01
10
1
0.1
LOAD REGULATION
vs. LOAD CURRENT
-2
-6
-8
6
8
4
0
-4
2
MAX1637-08
LOAD CURRENT (A)
LOAD REGULATION
∆
V
OUT
(mV)
0
0.3
0.2
0.1
0.4
0.5
0.6
0
40
30
10 20
50 60 70 80 90 100
REF LOAD-REGULATION ERROR
vs. REF LOAD CURRENT
MAX1637-09
REF LOAD CURRENT (
µ
A)
REF LOAD REGULATION
∆
V (mV)
900
0
0.01
10
1
0.1
DROPOUT VOLTAGE
vs. LOAD CURRENT
300
200
100
700
800
600
400
500
MAX1637-10
LOAD CURRENT (A)
DROPOUT VOLTAGE (mV)
V
OUT
FORCED TO 3.27V
SYNC = V
CC
V
OUT
20mV/div
V
LX
INDUCTOR
CURRENT
1A
0V
5V
0A
SWITCHING WAVEFORMS
(PWM MODE)
MAX1637-13
1
µ
s/div
V
OUT
50mV/div
LOAD
CURRENT
0A
2A
4A
LOAD-TRANSIENT RESPONSE
(3.3V/3A, PWM MODE)
MAX1637 TOC11
100
µ
s/div
V
OUT
50mV/div
5A LOAD CURRENT
0A
10A
LOAD-TRANSIENT RESPONSE
(1.8V, PWM MODE)
MAX1637 TOC12
100
µ
s/div
V
OUT
50mV/div
V
LX
INDUCTOR
CURRENT
1A
0V
5V
0A
SWITCHING WAVEFORMS
(PFM MODE)
MAX1637-14
20
µ
s/div
V
OUT
= 1.7V
1
µ
s/div
SWITCHING WAVEFORMS
DROPOUT OPERATION
MAX1637-15
V
OUT
10mV/div
V
LX
2V/div
INDUCTOR
CURRENT
1A
0A
V
OUT
FORCED TO 3.27V
SYNC = V
CC
____________________________________Typical Operating Characteristics (continued)
(V
OUT
= 3.3V, T
A
= +25°C, unless otherwise noted.)