MAX796 查看數據表（PDF） - Maxim Integrated
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MAX796 Datasheet PDF : 32 Pages
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Step-Down Controllers with
Synchronous Rectifier for CPU Power
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, GND = PGND = 0V, IVL = IREF = 0A, TA = 0°C to +70°C for MAX79_C, TA = 0°C to +85°C for MAX79_E,
TA = -55°C to +125°C for MAX79_M, unless otherwise noted.)
PARAMETER
Reference Output Voltage
CONDITIONS
No external load (Note 1)
MAX79_C
MAX79_E/M
MIN TYP MAX UNITS
2.46 2.505 2.54
V
2.45
2.55
Reference Fault Lockout Voltage
Reference Load Regulation
CSL Shutdown Leakage Current
V+ Shutdown Current
V+ Off-State Leakage Current
Falling edge
0µA < IREF < 100µA
SHDN = 0V, CSL = 6V, V+ = 0V or 30V, VL = 0V
SHDN = 0V, V+ = 30V,
CSL = 0V or 6V
MAX79_C
MAX79_E/M
FB = CSH = CSL = 6V,
VL switched over to CSL
MAX79_C
MAX79_E/M
1.8
2.3
V
50
mV
0.1
1
µA
1
3
µA
1
5
1
3
µA
1
5
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
4
8
mW
4.8
6.6
mW
270
300
330
kHz
125
150
175
200
ns
200
ns
200
ns
Oscillator Sync Range
Maximum Duty Cycle
Input High Voltage
Input Low Voltage
Input Current
DL Sink/Source Current
DH Sink/Source Current
DL On-Resistance
DH On-Resistance
SYNC = REF
SYNC = 0V or 5V
SYNC
SHDN, SKIP
SYNC
SHDN, SKIP
SHDN, 0V or 30V
SECFB, 0V or 4V
SYNC, SKIP
CSH, CSL, CSH = CSL = 6V, device not shut down
FB, FB = REF
DL forced to 2V
DH forced to 2V, BST-LX = 4.5V
High or low
High or low, BST-LX = 4.5V
190
89
91
93
96
VL - 0.5
2.0
1
1
340
kHz
%
V
0.8
V
0.5
2.0
0.1
µA
1.0
50
±100 nA
A
A
7
Ω
7
Ω
Note 1: Since the reference uses VL as its supply, V+ line-regulation error is insignificant.
Note 2: At very low input voltages, quiescent supply current may increase due to excess PNP base current in the VL linear
regulator. This occurs only if V+ falls below the preset VL regulation point (5V nominal). See the Quiescent Supply Current
vs. Supply Voltage graph in the Typical Operating Characteristics.
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