MAX1636(1997) データシートの表示（PDF） - Maxim Integrated
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MAX1636
(Rev.:1997)
(Rev.:1997)
Maxim Integrated
MAX1636 Datasheet PDF : 24 Pages
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Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, SYNC = VL = VCC, IVL = 0mA, IREF = 0mA, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
OSCILLATOR
Oscillator Frequency
SYNC Input Pulse Width High
SYNC Input Pulse Width Low
SYNC Input Rise/Fall Time
SYNC Input Frequency Range
OVERVOLTAGE PROTECTION
Overvoltage Trip Threshold
CONDITIONS
SYNC = VCC
SYNC = GND
Guaranteed by design
FB, with respect to regulation point
Catastrophic Output Undervoltage
Lockout Threshold
RESET Trip Threshold
INPUTS AND OUTPUTS
Logic Input Voltage High
Logic Input Voltage Low
RESET Output Voltage Low
Gate-Driver On-Resistance
% of nominal output
Falling edge (hysteresis = 1%)
SHDN, SKIP, OVP, SYNC
SHDN, SKIP, OVP, SYNC
ISINK = 4mA
High or low, DH or DL
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
MIN TYP MAX
UNITS
270
330
kHz
170
230
200
ns
200
ns
200
ns
240
340
kHz
3.5
10
%
60
80
%
-7
-1.5
%
2.4
V
0.8
V
0.4
V
7
Ω
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, VIN = 7V, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(3.3V/3A CIRCUIT)
100
VIN = 7V
90
VIN = 15V
80
70
VIN = 22V VIN = 30V
60
50
1m
10m
100m
1
10
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(5V/3A CIRCUIT)
100
VIN = 7V
90 VIN = 15V
80
VIN = 22V VIN = 30V
70
60
50
1m
10m
100m
1
10
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(1.8V/1A CIRCUIT)
100
90
VIN = 7V
80
VIN = 15V
70
60
VIN = 22V
50
1m
10m
100m
1
10
LOAD CURRENT (A)
_______________________________________________________________________________________ 5
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