Datasheet

MAX8627
Low V
BATT
, 20µA IQ, 1MHz Synchronous
Boost Converter with True Shutdown
6
Maxim Integrated
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.)
STARTUP WAVEFORMS WITH NO LOAD
MAX8627 toc16
400
µ
s/div
V
POUT
I
LX
V
ON
2V/div
500mV/div
0
2V/div
0
STARTUP WAVEFORMS WITH 100mA LOAD
MAX8627 toc17
400
µ
s/div
V
POUT
I
LX
V
ON
2V/div
500mV/div
0
2V/div
0
BODE PLOT WITH 2 x 22µF CERAMIC
OUTPUT CAPACITORS, 500mA LOAD
MAX8627 toc19
FREQUENCY (Hz)
10
20
30
-20
-30
-40
-10
0
40
GAIN (dB)
120
150
180
30
0
60
90
PHASE (DEG)
1k 10k 100k 1M
GAIN
PHASE
7dB GAIN
MARGIN
48-DEG PHASE MARGIN
94kHz
SWITCHING FREQUENCY vs. TEMPERATURE
MAX8627 toc18
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
35 6010-15
998
1000
1002
992
994
996
1004
1006
990
-40 85
BODE PLOT WITH 2 x 47µF TANTALUM OUTPUT
CAPACITORS (130mΩ ESR), 500mA LOAD
MAX8627 toc20
FREQUENCY (Hz)
10
20
30
-20
-30
-40
-10
40
GAIN (dB)
120
150
180
30
0
60
90
PHASE (DEG)
1k 10k 100k 1M
GAIN
PHASE
13dB GAIN MARGIN
125 - DEG PHASE MARGIN
27kHz