參數(shù)資料
型號(hào)： MAX1714
廠商： Maxim Integrated Products, Inc.
英文描述： High-Speed Step-Down Controller for Notebook Computers
中文描述： 高速、降壓型控制器，用于筆記本電腦
文件頁(yè)數(shù)： 3/24頁(yè)
文件大?。?/td> 443K
代理商： MAX1714
M
High-Speed Step-Down Controller
for Notebook Computers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, V
CC
= V
DD
= +5V,
SKIP
= AGND,
T
A
=
0°C to +85°C
, unless otherwise
noted.) (Note 1)
CONDITIONS
PARAMETER
Overvoltage Trip Threshold
With respect to error comparator threshold (MAX1714A only)
UNITS
%
MIN
10.5
TYP
12.5
MAX
14.5
PGND - LX
PGND - LX, I
LIM
= 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
Blanking Time
%
65
70
75
Output Undervoltage Protection
Threshold
PGND - LX,
SKIP
= V
CC
, T
A
= +25°C,
with respect to positive current-limit threshold
%
-90
-120
-140
Current-Limit Threshold
(Negative Direction)
V
ILIM
= 0.5V
V
ILIM
= 2.0V
Rising edge, hysteresis = 20mV,
PWM disabled below this level
V
4.1
4.4
V
CC
Undervoltage Lockout
Threshold
BST - LX forced to 5V
1.5
5
DH Gate-Driver On-Resistance
DL, high state
1.5
5
DL Gate-Driver On-Resistance
(Pull-Up)
DL, low state
0.5
1.7
DL Gate-Driver On-Resistance
(Pull-Down)
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
1
3
35
26
DL Gate-Driver Source Current
DL Gate-Driver Sink Current
FB forced 2% above trip threshold (MAX1714A only)
μs
1.5
Overvoltage Fault Propagation
Delay
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
PGND - LX,
SKIP
= AGND
mV
3
Current-Limit Threshold
(Zero Crossing)
0.4
1
150
With respect to error comparator threshold
ns
Dead Time
mA
SKIP
Input Current Logic
Threshold
To disable overvoltage and undervoltage fault detection,
T
A
= +25°C
-1.5
-0.1
%
PGOOD Trip Threshold
Measured at FB with respect to error comparator
threshold, falling edge
-8
-6
-4
V
V
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
ILIM Input Current
SHDN
,
SKIP
SHDN
,
SKIP
SHDN
,
SKIP
SHDN
,
SKIP
2.4
0.8
1
μA
nA
-1
±10
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