MAX8625A Maxim Integrated Products, MAX8625A Datasheet - Page 4

• 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
(V
4
3.33
3.32
3.31
3.30
3.29
3.28
3.27
100
100
IN
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
_______________________________________________________________________________________
= 3.6V, SKIP = GND, T
0.1
3.0
0.1
OUTPUT VOLTAGE vs. INPUT VOLTAGE
LOAD: 500mA, V
T
A
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
WITH INTERNAL FB RESISTORS
= +25°C, T
3.5
SKIP AND FPWM MODES
FPWM MODE (FIGURE 3)
1
1
LOAD CURRENT (mA)
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
4.0
A
= -40°C, T
OUT
= 3.3V
4.5
10
10
A
= +85°C
5.0
A
V
100
= +25°C, Figure 4, unless otherwise noted.)
100
V
OUT
OUT
V
V
IN
IN
5.5
= 3.45V
= 3.3V
= 2.7V
= 2.7V
3.0V,
3.3V,
3.6V,
4.2V,
3.0V,
3.3V,
3.6V,
4.2V,
5.0V
5.0V
1000
1000
6.0
2.82
2.81
2.80
2.79
2.78
2.77
2.76
2.75
100
-0.5
-1.0
-1.5
-2.0
2.0
1.5
1.0
0.5
95
90
85
80
75
70
65
60
0
3.0
2.0
0.1
OUTPUT VOLTAGE (3.3V INTERNAL FB)
OUTPUT VOLTAGE vs. INPUT VOLTAGE
LOAD: 500mA, V
T
V
T
A
300mA
OUT
A
= +25°C, T
2.5
WITH EXTERNAL FB RESISTORS
500mA
= +25°C, T
3.5
= 3.3V
SKIP-MODE EFFICIENCY
3.0
1
vs. INPUT VOLTAGE
vs. LOAD CURRENT
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
A
4.0
A
= -40°C, T
3.5
= -40°C, T
OUT
= 2.8V
V
LOAD CURRENT = 100mA,
300mA, 500mA
4.0
4.5
OUT
10
A
= 3.3V
A
= +85°C (FIGURE 3)
Typical Operating Characteristics
4.5
= +85°C,
5.0
5.0
100
5.5
100mA
5.5
1000
6.0
6.0
0.01
-0.5
-1.0
-1.5
-2.0
100
100
0.1
2.0
1.5
1.0
0.5
10
90
80
70
60
50
40
30
20
10
1
0
0
2.0
0.1
0.1
OUTPUT VOLTAGE (2.8V EXTERNAL FB)
SUPPLY CURRENT vs. INPUT VOLTAGE
V
T
A
OUT
EFFICIENCY vs. LOAD CURRENT
2.5
vs. LOAD CURRENT (FIGURE 3)
= +25°C, T
FPWM MODE
= 2.8V
FPWM MODE (FIGURE 3)
3.0
1
1
LOAD CURRENT (mA)
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
WITH NO LOAD
A
3.5
= -40°C, T
4.0
10
10
NO LOAD V
A
4.5
= +85°C
100
100
5.0
OUT
V
OUT
V
IN
= 3.3V
5.5
= 2.8V
= 2.7V
3.0V,
3.3V,
3.6V,
4.2V,
5.0V
1000
1000
6.0