Datasheet

MAX5008
Regulated 5V USB Charge Pump with
Programmable Current Limit
4 _______________________________________________________________________________________
EFFICIENCY
vs. LOAD CURRENT
MAX5008 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
10010
10
20
30
40
50
60
70
80
90
100
0
1 1000
V
IN
= 2.95V
V
IN
= 3.3V
200ns/div
OUTPUT WAVEFORM
10mV/div
MAX5008 toc05
LINE-TRANSIENT RESPONSE
MAX5008 toc07
40µs/div
A
B
3.6V
3.1V
I
LOAD
= 100mA
A: INPUT VOLTAGE: 500mV/div
B: OUTPUT VOLTAGE: AC-COUPLED, 100mV/div
LOAD-TRANSIENT RESPONSE
MAX5008 toc08
40µs/div
A
B
100mA
A: LOAD CURRENT
B: OUTPUT VOLTAGE: AC-COUPLED, 100mV/div
10mA
1ms/div
SHUTDOWN TIMING
MAX5008 toc06
5V
0
5V
0
V
OUT
R
L
= 46Ω
SHDN
Typical Operating Characteristics (continued)
(V
IN
= 3V, C
IN
= 4.7µF, C
X
= 0.47µF, C
OUT
= 4.7µF, C
EXT
= 4.7µF, R
CS
= 0.4Ω, T
A
= +25°C, unless otherwise noted.)