MAX8627 Maxim Integrated Products, MAX8627 Datasheet - Page 6

• Manufacturer Part Number: MAX8627
• Description: Synchronous Boost Converter
• Manufacturer: Maxim Integrated Products

Low V
Boost Converter with True Shutdown
(Circuit of
6
_______________________________________________________________________________________
Figure
1006
1004
1002
1000
V
998
996
994
992
990
POUT
V
I
ON
LX
SWITCHING FREQUENCY vs. TEMPERATURE
1, V
BATT
-40
STARTUP WAVEFORMS WITH NO LOAD
OUTS
-15
= V
TEMPERATURE (°C)
POUT
10
, 20µA IQ, 1MHz Synchronous
400μs/div
= 5V, V
35
ON
60
MAX8627 toc16
= V
BODE PLOT WITH 2 x 47μF TANTALUM OUTPUT
-10
-20
-30
-40
40
30
20
10
CAPACITORS (130mΩ ESR), 500mA LOAD
1k
BATT
Typical Operating Characteristics (continued)
PHASE
GAIN
85
2V/div
0
2V/div
0
500mV/div
= 3.6V, T
10k
125 - DEG PHASE MARGIN
27kHz
FREQUENCY (Hz)
A
= +25°C, unless otherwise noted.)
13dB GAIN MARGIN
100k
V
POUT
V
-10
-20
-30
-40
40
30
20
10
MAX8627 toc20
I
0
ON
LX
STARTUP WAVEFORMS WITH 100mA LOAD
1k
BODE PLOT WITH 2 x 22μF CERAMIC
PHASE
OUTPUT CAPACITORS, 500mA LOAD
GAIN
1M
180
150
120
90
60
30
0
48-DEG PHASE MARGIN
94kHz
10k
FREQUENCY (Hz)
400μs/div
100k
7dB GAIN
MARGIN
MAX8627 toc19
MAX8627 toc17
1M
180
150
120
90
60
30
0
2V/div
0
2V/div
0
500mV/div