參數(shù)資料
型號(hào)： MAX1712
廠(chǎng)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(yè)數(shù)： 2/28頁(yè)
文件大?。?/td> 437K
代理商： MAX1712
M
High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V+ to GND..............................................................-0.3V to +30V
V
CC
, V
DD
to GND .....................................................-0.3V to +6V
PGND to GND.....................................................................±0.3V
SHDN
, PGOOD to GND ...........................................-0.3V to +6V
OVP,
ILIM, FB, FBS, CC, REF, D0–D4,
GNDS, TON to GND..............................-0.3V to (V
CC
+ 0.3V)
SKIP
to GND (Note 1).................................-0.3V to (V
CC
+ 0.3V)
DL to PGND................................................-0.3V to (V
DD
+ 0.3V)
BST to GND............................................................-0.3V to +36V
Note 1:
SKIP
may be forced below -0.3V, temporarily exceeding the absolute maximum rating, for the purpose of debugging proto-
type breadboards using the no-fault test mode. Limit the current drawn to -5mA maximum.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
BATT
= 15V, V
CC
= V
DD
= 5V,
SKIP
= GND,
T
A
=
0°C to +85°C
, unless otherwise noted.)
DH to LX.....................................................-0.3V to (BST + 0.3V)
LX to BST..................................................................-6V to +0.3V
REF Short Circuit to GND...........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
24-Pin QSOP (derate 9.5mW/°C above +70°C)..........762mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10s).................................+300°C
V
BATT
= 4.5V to 28V, includes
load regulation error
SHDN
= 0, measured at V+ = 28V, V
CC
= V
DD
= 0 or 5V
SHDN
= 0
V
CC,
V
DD
SHDN
= 0
Battery voltage, V+
Measured at V+
Measured at V
DD
, FB forced above the regulation point
Measured at V
CC
, FB forced above the regulation point
Rising edge of
SHDN
to full I
LIM
TON = GND (550kHz)
(Note 2)
V
BATT
= 24V,
FB = 2V
(Note 2)
FB (MAX1710 only) or FBS
FB - FBS or GNDS - GND = 0 to 25mV
V
CC
= 4.5V to 5.5V, V
BATT
= 4.5V to 28V
CONDITIONS
μA
<1
5
Shutdown Battery Supply
Current
μA
<1
5
Shutdown Supply Current (V
DD
)
μA
<1
5
Shutdown Supply Current (V
CC
)
μA
25
40
Quiescent Battery Supply Current
μA
<1
5
Quiescent Supply Current (V
DD
)
μA
600
950
Quiescent Supply Current (V
CC
)
ns
400
500
Minimum Off-Time
380
425
470
260
290
320
175
200
225
%
-1
1
DC Output Voltage Accuracy
TON = REF (400kHz)
TON = open (300kHz)
TON = V
CC
(200kHz)
4.5
5.5
V
2
28
Input Voltage Range
ns
140
160
180
On-Time
ms
1.7
Soft-Start Ramp Time
μA
-1
1
GNDS Input Bias Current
μA
-0.2
0.2
FB Input Bias Current
mV
mV
3
5
Remote-Sense Voltage Error
Line Regulation Error
UNIT
MIN
TYP
MAX
PARAMETER
Falling edge, hysteresis = 40mV
REF in regulation
I
REF
= 0 to 50μA
V
CC
= 4.5V to 5.5V, no external REF load
V
1.6
REF Fault Lockout Voltage
μA
10
REF Sink Current
V
0.01
Reference Load Regulation
V
1.98
2
2.02
Reference Voltage
k
130
180
240
FB Input Resistance
(MAX1711/MAX1712)
DAC codes from 1.3V to 2V
-1.2
1.2
I
LOAD
= 0 to 7A
mV
9
Load Regulation Error
DAC codes from 0.925V
to 1.275V
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