參數(shù)資料
型號： MAX1712
廠商： Maxim Integrated Products, Inc.
英文描述： High-Speed, Digitally Adjusted Step-Down Controllers for Notebook CPUs
中文描述： 高速、數(shù)字可調(diào)、降壓型控制器，用于筆記本電腦
文件頁數(shù)： 3/28頁
文件大?。?/td> 437K
代理商： MAX1712
With respect to unloaded output voltage (MAX1710)
(MAX1711/MAX1712)
M
High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
BATT
= 15V, V
CC
= V
DD
= 5V,
SKIP
= GND,
T
A
=
0°C to +85°C
, unless otherwise noted.)
PARAMETER
With respect to unloaded output voltage (MAX1710)
(MAX1711/MAX1712)
CONDITIONS
UNIT
%
V
MIN
10.5
2.21
TYP
12.5
2.25
MAX
14.5
2.29
LX to PGND
LX to PGND, ILIM tied to V
CC
From
SHDN
signal going high
mV
40
170
50
200
60
230
Current-Limit Threshold
(Positive Direction, Adjustable)
mV
90
100
110
Current-Limit Threshold
(Positive Direction, Fixed)
ms
10
30
Output Undervoltage Protection
Time
%
V
65
0.76
70
0.8
75
0.84
Output Undervoltage Protection
Threshold
LX to PGND, T
A
= +25°C
mV
-150
-120
-80
Current-Limit Threshold
(Negative Direction)
R
LIM
= 100k
R
LIM
= 400k
Rising edge, hysteresis = 20mV,
PWM disabled below this level
V
4.1
4.4
V
CC
Undervoltage Lockout
Threshold
BST-LX forced to 5V
5
DH Gate-Driver On-Resistance
DL, high state
5
DL Gate-Driver On-Resistance
(Pullup)
DL, low state
0.5
1.7
DL Gate-Driver On-Resistance
(Pulldown)
DH forced to 2.5V, BST-LX forced to 5V
A
1
DH Gate-Driver Source/Sink
Current
DL forced to 2.5V
DL forced to 2.5V
DL rising
DH rising
A
A
3
1
35
26
DL Gate-Driver Sink Current
DL Gate-Driver Source Current
FB forced 2% above trip threshold
μs
1.5
Overvoltage Fault Propagation
Delay
Overvoltage Trip Threshold
FB forced 2% below PGOOD trip threshold, falling edge
I
SINK
= 1mA
High state, forced to 5.5V
Hysteresis = 10°C
μs
V
μA
°C
1.5
PGOOD Propagation Delay
PGOOD Output Low Voltage
PGOOD Leakage Current
Thermal Shutdown Threshold
LX to PGND
mV
3
Current-Limit Threshold
(Zero Crossing)
0.4
1
150
ns
Dead Time
mA
SKIP
Input Current Logic
Threshold
To enable no-fault mode, T
A
= +25°C
-1.5
-0.1
%
PGOOD Trip Threshold
Measured at FB with respect to unloaded output voltage,
falling edge, hysteresis = 1%
-8
-5
-3
V
V
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
Logic Input Pullup Current
D0–D4,
SHDN
,
SKIP
,
OVP
D0–D4,
SHDN
,
SKIP
,
OVP
SHDN
,
SKIP
,
OVP
D0–D4, each forced to GND
2.4
0.8
1
10
μA
μA
-1
3
5
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