MAX8625A Maxim Integrated Products, MAX8625A Datasheet - Page 6

• Manufacturer Part Number: MAX8625A
• Description: Step-Up/Down DC-DC Converter
• Manufacturer: Maxim Integrated Products

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High-Efficiency, Seamless Transition,
Step-Up/Down DC-DC Converter
6
(V
IN
_______________________________________________________________________________________
= 3.6V, SKIP = GND, T
500mA/div
500mA/div
2V/div
SHDN
I
-10
-20
-30
-40
-50
-60
BATT
40
30
20
10
0
I
LX
1
V
IN
GAIN AND PHASE vs. FREQUENCY
V
V
LOAD = 200mA
IN
OUT
= 3.6V, LOAD = 5Ω, V
PHASE
= 3.6
= 3.3V
STARTUP WAVEFORMS
LOAD TRANSIENT
10
FREQUENCY (kHz)
A
V
BODE PLOT
GAIN
= +25°C, Figure 4, unless otherwise noted.)
OUT
400μs/div
2ms/div
= 3.3V
100
OUT
= 3.288V
MAX8625A toc16
MAX8625A toc20
MAX8625A toc18
1000
Typical Operating Characteristics (continued)
I
500mA/div
V
20mV/div
I
250mA/div
V
100mV/div
(DC OFFSET = 3.3V)
LX
BATT
180
144
108
72
36
0
-36
-72
-108
-144
-180
OUT
OUT
3V OFFSET
500mV/div
500mA/div
CH1 = V
2V/div
SHDN
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
V
OUT
IN
-40
V
IN
STARTUP WAVEFORMS (FIGURE 3)
= 3.6V, LOAD = 30Ω, V
-20
V
OUT
OSCILLATOR FREQUENCY
V
vs. TEMPERATURE
IN
0
LINE TRANSIENT
= 3.3V, LOAD = 5.5Ω,
TEMPERATURE (°C)
RAMP 3V TO 4V
20
2ms/div
1ms/div
40
60
OUT
MAX8625A toc17
MAX8625A toc19
= 1.5V
80
100
I
500mA/div
CH2 = V
50mV/div
(AC-COUPLED)
I
100mA/div
LX
BATT
OUT