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MAX1537ETX Datasheet(PDF) 3 Page - Maxim Integrated Products

Part # MAX1537ETX
Description  High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1537ETX Datasheet(HTML) 3 Page - Maxim Integrated Products

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High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VIN = 12V, both SMPS enabled, VCC = 5V, FSEL = REF, SKIP = GND, VILIM_ = VLDO5, VINA = 15V, VLDOA = 12V,
ILDO5 = ILDO3 = ILDOA = no load, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Line-Regulation Error
Either SMPS, duty cycle = 10% to 90%
1
%
FSEL = GND
170
200
230
FSEL = REF
270
300
330
Operating Frequency (Note 1)
fOSC
FSEL = VCC
425
500
575
kHz
FSEL = GND
91
93
FSEL = REF
91
93
Maximum Duty Factor (Note 1)
DMAX
FSEL = VCC
91
93
%
Minimum On-Time
tON(MIN)
(Note 3)
200
ns
40
%
SMPS3 to SMPS5 Phase Shift
SMPS5 starts after SMPS3
144
Deg
CURRENT LIMIT
ILIM_ Adjustment Range
0.5
VREF
V
Current-Sense Input Range
CSH_, CSL_
0
5.5
V
Current-Sense Input Leakage
Current
CSH_, VCSH_ = 5.5V
-1
+1
µA
Current-Limit Threshold (Fixed)
VLIMIT_VCSH_ - VCSL_, ILIM_ = VCC
70
75
80
mV
VILIM_ = 2.00V
170
200
230
VILIM_ = 1.00V
91
100
109
Current-Limit Threshold
(Adjustable)
VLIMIT_
VCSH_ - VCSL_
VILIM_ = 0.50V
42
50
58
mV
Current-Limit Threshold
(Negative)
VNEG
VCSH_ - VCSL_, SKIP = VCC, percent of
current limit
-120
%
Current-Limit Threshold (Zero
Crossing)
VZX
VPGND - VLX_, SKIP = GND, ILIM_ = VCC
3mV
ILIM_ = VCC
10
16
22
mV
Idle-Mode
™ Threshold
VIDLE
VCSH_ - VCSL_
With respect to current-
limit threshold (VLIMIT)
20
%
ILIM_ Leakage Current
ILIM3 = ILIM5 = GND or VCC
-0.1
+0.1
µA
Soft-Start Ramp Time
tSS
Measured from the rising edge of ON_ to
full scale
512 /
fOSC
s
INTERNAL FIXED LINEAR REGULATORS
LDO5 Output Voltage
VLDO5
ON3 = ON5 = GND, 6V < VIN < 26V,
0 < ILDO5 < 100mA
4.80
4.95
5.10
V
LDO5 Undervoltage-Lockout Fault
Threshold
Rising edge, hysteresis = 1%
3.75
4.0
4.25
V
LDO5 Bootstrap Switch Threshold
Rising edge of CSL5, hysteresis = 1%
4.41
4.75
V
LDO5 Bootstrap Switch
Resistance
LDO5 to CSL5, VCSL5 = 5V,
ILDO5 = 50mA
0.75
3
Idle Mode is a trademark of Maxim Integrated Products, Inc.


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