MAX877 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX877 Datasheet PDF : 12 Pages
| |||
5V/3.3V/3V/Adjustable-Output,
Step-Up/Step-Down DC-DC Converters
__________________________________________Typical Operating Characteristics
(Circuit of Figure 4, TA = +25°C, unless otherwise noted.)
MAX877/MAX879
EFFICIENCY vs. LOAD CURRENT
90
VOUT = 5V
VIN = 4V
80
70
60
VIN = 5V
50
40
30
0.1
VIN = 2.5V
VIN = 6.2V
VIN = 1.8V
1
10
100
LOAD CURRENT (mA)
1000
MAX878 MAXIMUM OUTPUT
CURRENT vs. INPUT VOLTAGE
350
300
250
200
DIP PACKAGE
DISSIPATION LIMIT
150
SO PACKAGE
DISSIPATION LIMIT
100
50
VOUT = 3.0V
TA = +70°C
0
0 12 3 4 5 6 7
INPUT VOLTAGE (V)
SHDN THRESHOLD VOLTAGE
vs. INPUT VOLTAGE AND TEMPERATURE
3.5
3.0
2.5
TA = +125°C
MAX878
EFFICIENCY vs. LOAD CURRENT
90
VOUT = 3.3V OR 3.0V
80
70
VIN = 2.5V
60
VIN = 3.3V
VIN = 1.8V
50
40
30
0.1
VIN = 5V
VIN = 6.2V
1
10
100
LOAD CURRENT (mA)
1000
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE AND TEMPERATURE
300
(SWITCH = OFF)
280
260
TA = +85°C
240 TA = +25°C
220
200
180
160
140
120
TA = 0°C
TA = -40°C
100
1 23
45 67
SUPPLY VOLTAGE (V)
LOAD-TRANSIENT RESPONSE
A
MAX877/MAX879 MAXIMUM OUTPUT
CURRENT AT LOW INPUT VOLTAGE
350
300
250
200
150
100
50
0
0
VOUT = 5V
1
2
3
INPUT VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE AND TEMPERATURE
80
70
60
50
40 TA = +85°C
30
20
10
TA = 0°C
TA = -40°C
0
1 23
45 67
INPUT VOLTAGE (V)
LINE-TRANSIENT RESPONSE
A
GND
2.0
1.5
1.0
0.5
1
TA = +25°C
TA = -55°C
23
45 67
INPUT VOLTAGE (V)
2ms/div
A: IOUT, 200mA/div, 0mA to 200mA
B: VOUT, 50mV/div, AC COUPLED
MAX878, VOUT = 3.3V, VIN = 2.5V
B
B
A: VIN, 2V/div, 2V to 4V 2ms/div
B: VOUT, 50mV/div, AC COUPLED
IOUT = 240mA
MAX878, VOUT = 3.3V, CINBYPASS = 47µF
4 _______________________________________________________________________________________
Share Link: 