MAX8717 查看數據表（PDF） - Maxim Integrated
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生产厂家
MAX8717
Maxim Integrated
MAX8717 Datasheet PDF : 30 Pages
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Interleaved High-Efficiency, Dual Power-Supply
Controllers for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VIN = 12V, FSEL = REF, SKIP_ = 0, VON_ = VILIM_ = VCC = VDD = 5V, TA = 0°C to +85°C, unless otherwise noted.
Typical values are at TA = +25°C.)
PARAMETER
Line-Regulation Error
FB_ Input Bias Current
Operating Frequency
Maximum Duty Factor
Minimum On-Time
SYMBOL
CONDITIONS
Either SMPS, 4V < VIN < 26V
IFB_ VFB_ = 0 to 5.5V
FSEL = GND
fOSC FSEL = REF (Note 3)
FSEL = VCC
FSEL = GND
DMAX FSEL = REF (Note 3)
FSEL = VCC
tON(MIN) (Note 4)
MIN
-0.1
170
270
425
97.5
97.5
97.5
SMPS1 to SMPS2 Phase Shift
SMPS2 starts after SMPS1
Soft-Start Ramp Time
tSSTART
Measured from the rising edge of ON_ to full
scale, REF = 2V
Soft-Stop Ramp Time
tSSTOP
Measured from the falling edge of ON_ to full
scale
CURRENT LIMIT
ILIM_ Adjustment Range
Current-Limit Threshold (Fixed)
Current-Limit Threshold
(Adjustable)
Current-Limit Threshold
(Negative)
VLIMIT_
VLIMIT_
VNEG
VCSH_ - VCSL _, ILIM_ = VCC (Note 3)
VCSH_ - VCSL _
VILIM_ = 2.00V
VILIM_ = 1.00V
VCSH_ - VCSL _, SKIP_ = ILIM_ = VCC
(Note 3)
VCSH_ - VCSL _, SKIP_ = VCC, adjustable
mode, percent of current limit
Current-Limit Threshold (Zero
Crossing)
VZX VCSH_ - VCSL _, SKIP_ = GND or REF
Idle Mode™ Threshold
VIDLE
VCSH_ - VCSL _,
SKIP_ = GND
Low-Noise Mode Threshold
VLN
VCSH_ - VCSL_
SKIP_ = REF
ILIM_ Leakage Current
REFERENCE (REF)
Reference Voltage
VREF
VCC = 4.5V to 5.5V,
IREF = 0
Idle Mode is a trademark of Maxim Integrated Products, Inc.
ILIM_ = VCC (Note 3)
With respect to
current-limit
threshold
ILIM_ = VCC (Note 3)
With respect to
current-limit
threshold
TA = +25°C to
+85°C
TA = 0°C to +85°C
0.5
45
190
94
-67
6
2.5
1.985
1.98
TYP
0.03
200
300
500
99
99
99
40
144
2
4
50
200
100
-60
-120
3
10
20
5
10
2.00
2.00
MAX
+0.1
230
330
575
UNITS
%/V
µA
kHz
%
200
ns
%
Degrees
ms
ms
VREF
V
55
mV
210
mV
106
-53
mV
%
mV
14
mV
%
7.5
mV
%
0.1
µA
2.015
V
2.02
_______________________________________________________________________________________ 3
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