MAX797H 查看數據表（PDF） - Maxim Integrated
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MAX797H Datasheet PDF : 8 Pages
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High-Voltage, Step-Down Controller with
Synchronous Rectifier for CPU Power
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, GND = PGND = 0V, IVL = IREF = 0A, TA = 0°C to +85°C, SYNC = 0V, unless otherwise noted.)
PARAMETER
CONDITIONS
Reference Output Voltage
No external load (Note 1)
Reference Fault Lockout Voltage Falling edge
Reference Load Regulation
CSL Shutdown Leakage Current
V+ Shutdown Current
0µA < IREF < 100µA
SHDN = 0V, CSL = 6V, V+ = 0V or 30V, VL = 0V
SHDN = 0V, V+ = 30V, CSL = 0V or 6V
V+ Off-State Leakage Current FB = CSH = CSL = 6V, VL switched over to CSL
Dropout Power Consumption V+ = 4V, CSL = 0V (Note 2)
Quiescent Power Consumption CSH = CSL = 6V
OSCILLATOR AND INPUTS/OUTPUTS
Oscillator Frequency
SYNC = REF
SYNC = 0V or 5V
SYNC High Pulse Width
SYNC Low Pulse Width
SYNC Rise/Fall Time
Guaranteed by design
Oscillator Sync Range
Maximum Duty Factor
SYNC = REF
SYNC = 0V or 5V
Input High Voltage
SYNC
SHDN, SKIP
Input Low Voltage
SYNC
SHDN, SKIP
SHDN, 0V or 30V
Input Current
SYNC, SKIP
CSH, CSL, CSH = CSL = 4V, device not shut down
FB, FB = REF
DL Sink/Source Current
DL forced to 2V
DH Sink/Source Current
DH forced to 2V, BST - LX = 4.5V
DL On-Resistance
High or low
DH On-Resistance
High or low, BST - LX = 4.5V
MIN TYP
2.45 2.505
1.8
0.1
1
1
4
4.8
270
300
125
150
200
200
190
89
91
93
96
VL - 0.5
2.0
1
1
MAX
2.55
2.3
50
1
5
5
8
6.6
UNITS
V
V
mV
µA
µA
µA
mW
mW
330
kHz
175
ns
ns
200
ns
340
kHz
%
V
0.8
V
0.5
2.0
1.0
µA
50
±100 nA
A
A
7
Ω
7
Ω
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