MAX608ESA 查看數據表（PDF） - Maxim Integrated
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MAX608ESA Datasheet PDF : 12 Pages
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5V or Adjustable, Low-Voltage,
Step-Up DC-DC Controller
ELECTRICAL CHARACTERISTICS (continued)
(VOUT = 5V, ILOAD = 0mA, TA = -40°C to +85°C where indicated. TA = -25°C to +85°C for all other limits. Typical values are at
TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Current-Limit Trip Level
CS Input Current
EXT Rise Time
EXT Fall Time
EXT On-Resistance
TA = -25°C to +85°C
85
100 115
VCS
VOUT = 3V to 16.5V
mV
TA = -40°C to +85°C (Note 1) 80
120
ICS
0.01 ±1
µA
VOUT = 5V, 1nF from EXT to GND
VOUT = 5V, 1nF from EXT to GND
50
ns
50
EXT = high or low
15
30
Ω
Note 1: Limits over this temperature range are guaranteed by design.
Note 2: The MAX608 must be operated in bootstrapped mode with OUT connected to the DC-DC circuit output. The minimum output
voltage set point is +3V.
Note 3: Output voltage guaranteed using preset voltages. See Figures 4a–4d for output current capability versus input voltage.
Note 4: Output voltage line and load regulation depend on external circuit components.
Note 5: Operation in the external-feedback mode is guaranteed to be accurate to the VFB trip level, and does not include resistor tolerance.
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5V)
100
VIN = 4.0V
90
VIN = 3.5V
EFFICIENCY vs. LOAD CURRENT
(VOUT = 12V)
100
VIN = 9.0V
VIN = 6.0V
VIN = 5.0V
90
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V)
100
VIN = 3.0V
90
80
80
80
VIN = 3.0V
VIN = 2.0V
70
VIN = 2.0V
VIN = 3.0V
70
70
VIN = 2.0V
60
1
700
600
500
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT vs.
MINIMUM START-UP
INPUT VOLTAGE
VOUT = 5V
CIRCUIT OF FIGURE 2a
EXTERNAL FET THRESHOLD LIMITS
FULL-LOAD START-UP BELOW 3.7V
400
300
200
100
60
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT vs.
MINIMUM START-UP
INPUT VOLTAGE
500 VOUT = 12V
CIRCUIT OF FIGURE 2b
400
EXTERNAL FET THRESHOLD LIMITS
FULL-LOAD START-UP BELOW 3.6V
300
200
100
60
1
200
150
100
50
10
100
LOAD CURRENT (mA)
1000
SUPPLY CURRENT
vs. INPUT VOLTAGE
0
1.8
2.2 2.6 3.0 3.4 3.8 4.0
MINIMUM START-UP VOLTAGE (V)
0
1.8
2.2 2.6 3.0 3.4 3.8 4.0
MINIMUM START-UP VOLTAGE (V)
0
0
1
2
3
4
5
INPUT VOLTAGE (V)
_______________________________________________________________________________________ 3
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