Datasheet

MAX8627
Low V
BATT
, 20µA IQ, 1MHz Synchronous
Boost Converter with True Shutdown
5
Maxim Integrated
SOFT-START TIME vs. INPUT VOLTAGE
MAX8627 toc10
INPUT VOLTAGE (V)
SOFT-START TIME (ms)
3.5 4.52.51.5
2.5
3.0
3.5
0.5
1.5
1.0
2.0
4.0
4.5
5.0
0
0.5 5.5
PEAK INDUCTOR CURRENT vs. V
ILIM
MAX8627 toc11
V
ILIM
(V)
PEAK INDUCTOR CURRENT (A)
1.050.850.65
2.0
2.5
3.0
0.5
1.0
1.5
3.5
4.0
0
0.45 1.25
HEAVY LOAD SWITCHING WAVEFORMS
MAX8627 toc12
1
µ
s/div
V
LX
I
LI
V
POUT
100mV/div
(AC-COUPLED)
2V/div
1A/div
0
0
LIGHT-LOAD SWITCHING WAVEFORMS
MAX8627 toc13
40
µ
s/div
V
LX
I
LI
V
POUT
100mV/div
(AC-COUPLED)
2V/div
1A/div
0
0
LOAD TRANSIENT RESPONSE
MAX8627 toc14
20
µ
s/div
I
LOAD
V
POUT
100mV/div
(AC-COUPLED)
500mA/div
0
LINE TRANSIENT RESPONSE
MAX8627 toc15
100
µ
s/div
V
POUT
V
BATT
2V/div
100mV/div
(AC-COUPLED)
0
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
OUTS
= V
POUT
= 5V, V
ON
= V
BATT
= 3.6V, T
A
= +25°C, unless otherwise noted.)