Typical operating characteristics (continued) – Rainbow Electronics MAX1636 User Manual
Page 6
50
100
75
150
125
225
200
175
250
150
250
200
300
350
400
450
500
MAX1636 TOC11
F
OSC
(kHz)
RESET TIME DELAY (ms)
RESET TIME DELAY
vs. OSC FREQUENCY
V
OUT
50mV/div
LOAD
CURRENT
0A
2A
4A
LOAD-TRANSIENT RESPONSE
(3.3V/3A, PWM MODE)
MAX1636 TOC12
100
µs/div)
50
150
100
250
200
350
300
400
0
1.0
1.5
0.5
2.0
2.5
3.0
3.5
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX1636 TOC10
LOAD CURRENT (A)
V
IN
- V
OUT
(mV)
V
OUT
FORCED TO 4.95V
MAX1636
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
6
_______________________________________________________________________________________
5
-5
1m
100m
1
10m
10
-3
MAX1636 TOC07
LOAD CURRENT (A)
LOAD REGULATION
∆
V
OUT
(mV)
-1
1
3
-4
-2
0
2
4
LOAD REGULATION
vs. LOAD CURRENT
PWM MODE
V
OUT
= 5V
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 7V, T
A
= +25°C, unless otherwise noted.)
100
50
1m
100m
1
10m
10
EFFICIENCY vs. LOAD CURRENT
(1.8V/4A CIRCUIT)
60
MAX1636 TOC04
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
V
IN
= 7V
V
IN
= 22V
V
IN
= 15V
100
50
1m
100m
1
10m
10
EFFICIENCY vs. LOAD CURRENT
(1.8V/7A CIRCUIT)
60
MAX1636 TOC05
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
V
IN
= 15V
V
IN
= 7V
V
IN
= 22V
1000
0.01
0
15
20
25
10
5
30
QUIESCENT SUPPLY CURRENT
vs. INPUT VOLTAGE
0.10
MAX1636 TOC06
INPUT VOLTAGE (V)
QUIESCENT SUPPLY CURRENT (mA)
1
10
100
V
OUT
= 3.3V
0
10
5
15
30
35
25
20
40
0
10 15 20 25
5
30 35 40 45 50
VL LOAD-REGULATION ERROR
vs. VL LOAD CURRENT
MAX1636 TOC08
VL LOAD CURRENT (mA)
LOAD REGULATION
∆
V (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
MAX1636 TOC09
REF LOAD CURRENT (
µA)
LOAD REGULATION
∆
V (mV)