MAX879L Maxim Integrated Products, MAX879L Datasheet - Page 4

• Manufacturer Part Number: MAX879L
• Description: (MAX877L - MAX879L) Step-Up & Down DC-DC Converters
• Manufacturer: Maxim Integrated Products

Low-Voltage Input, 3V/3.3V/5V/
Adjustable Output, Step-Up DC-DC Converters
4
(Typical Operating Circuit, T
__________________________________________Typical Operating Characteristics
300
280
260
240
220
200
180
160
140
120
100
_______________________________________________________________________________________
1
(SWITCH = OFF)
vs. VOLTAGE AND TEMPERATURE
NO-LOAD SUPPLY CURRENT
2
T
T
A
SUPPLY VOLTAGE (V)
A
= +85°C
= -40°C
3
300
250
200
150
100
4
90
80
70
60
50
40
30
50
T
0
A
0.1
0.5
T
= 0°C
A
A
V
= +25°C
V
5
OUT
OUT
EFFICIENCY vs. LOAD CURRENT
= +25°C, unless otherwise noted).
MAXIMUM OUTPUT CURRENT
V
V
V
V
V
= 5V
= 5V
IN
IN
IN
IN
IN
LOAD CURRENT (mA)
1.0
1
6
MAX777L/MAX779L
= 4V
= 2.5V
= 1.8V
= 1.5V
= 1.1V
MAX777L/MAX779L
INPUT VOLTAGE (V)
vs. INPUT VOLTAGE
7
10
1.5
80
70
60
50
40
30
20
10
100
0
2.0
vs. INPUT VOLTAGE AND TEMPERATURE
1
SHUTDOWN SUPPLY CURRENT
1000
2
2.5
T
A
INPUT VOLTAGE (V)
= +85°C
3
T
A
= -40°C
4
T
A
= 0°C
5
6
350
250
200
150
100
300
50
90
80
70
60
50
40
30
7
0
0.5
0.1
V
V
OUT
OUT
EFFICIENCY vs. LOAD CURRENT
MAXIMUM OUTPUT CURRENT
= 3.3V
= 3.3V OR 3.0V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
V
V
V
V
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
1
vs. INPUT VOLTAGE
IN
IN
IN
IN
1.0
vs. INPUT VOLTAGE AND TEMPERATURE
1
= 2.5V
= 1.8V
= 1.5V
= 1.1V
MAX778L
MAX778L
T
SHDN THRESHOLD VOLTAGE
2
A
10
= +125°C
INPUT VOLTAGE (V)
T
A
3
1.5
= -55°C
MAX778L
100
4
T
A
1000
= +25°C
2.0
5
6
7