參數(shù)資料
型號： MAX799MJE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Step-Down Controllers with Synchronous Rectifier for CPU Power
中文描述： SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, DIP16
封裝： CERAMIC, DIP-16
文件頁數(shù)： 3/32頁
文件大?。?/td> 319K
代理商： MAX799MJE
M
S tep-Down Controllers with
S ync hronous Rec tifier for CPU Power
_______________________________________________________________________________________
3
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.
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, GND = PGND = 0V, IVL = IREF = 0A, T
A
= 0°C to +70°C for MAX79_C, T
A
= 0°C to +85°C for MAX79_E,
T
A
= -55°C to +125°C for MAX79_M, unless otherwise noted.)
SECFB, 0V or 4V
SYNC, SKIP
SHDN, 0V or 30V
SHDN, SKIP
SYNC
SYNC
SYNC = 0V or 5V
No external load (Note 1)
SYNC = REF
Guaranteed by design
CSH = CSL = 6V
V+ = 4V, CSL = 0V (Note 2)
SYNC = 0V or 5V
SHDN = 0V, V+ = 30V,
CSL = 0V or 6V
Falling edge
0μA < I
REF
< 100μA
SHDN = 0V, CSL = 6V, V+ = 0V or 30V, VL = 0V
SYNC = REF
CONDITIONS
0.1
1.0
MAX79_C
MAX79_E/M
μA
2.0
Input Current
2.0
V
VL - 0.5
Input High Voltage
%
93
96
89
91
Maximum Duty Cycle
kHz
190
340
Oscillator Sync Range
ns
200
SYNC Rise/Fall Time
ns
200
SYNC Low Pulse Width
ns
200
SYNC High Pulse Width
125
150
175
kHz
270
300
330
Oscillator Frequency
2.45
1.8
2.55
2.3
50
1
V
2.46
2.505
2.54
Reference Output Voltage
mW
4.8
6.6
Quiescent Power Consumption
OSCILLATOR AND INPUTS/OUTPUTS
mW
4
8
Dropout Power Consumption
1
1
5
3
μA
1
3
V+ Shutdown Current
V
Reference Fault Lockout Voltage
Reference Load Regulation
CSL Shutdown Leakage Current
mV
μA
0.1
UNITS
MIN
TYP
MAX
PARAMETER
MAX79_C
MAX79_E/M
MAX79_C
MAX79_E/M
FB = CSH = CSL = 6V,
VL switched over to CSL
1
5
μA
V+ Off-State Leakage Current
DL forced to 2V
DH forced to 2V, BST-LX = 4.5V
High or low
FB, FB = REF
CSH, CSL, CSH = CSL = 6V, device not shut down
A
A
1
1
DL Sink/Source Current
DH Sink/Source Current
DL On-Resistance
±100
50
SHDN, SKIP
0.5
V
0.8
Input Low Voltage
High or low, BST-LX = 4.5V
7
DH On-Resistance
7
nA
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