MAX17085B 데이터 시트보기 (PDF) - Maxim Integrated
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MAX17085B
Maxim Integrated
MAX17085B Datasheet PDF : 38 Pages
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Integrated Charger, Dual Main Step-Down
Controllers, and Dual LDO Regulators
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, no load on LDO5, LDO3, OUT5, OUT3, and REF, VCC = 5V, ON3 = ON5 = VCC, VDCIN = VLXC = VCSSP = VCSSN
= 19V, VBSTC - VLXC = 5V, VBATT = VCSIP = VCSIN = 12.6V, VVCTL = VISET = 1.8V, CELLS = open, TA = 0°C to +85°C, unless oth-
erwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
DH3 On-Time
tON3
RTON = 549kI
VIN = 12V,
(300kHz - 10%)
VOUT3 = 3.3V (Note 3) RTON = 202kI
(800kHz - 10%)
Minimum Off-Time
Extended On-Time Blanking
tOFF(MIN) (Note 3)
Duty cycle > 50%; not for production test
Soft-Start Time
tSS
Ultrasonic Operating Frequency fSW(USONIC)
MAIN SMPS FAULT DETECTION
Rising edge on ON_
SKIP = GND
MIN TYP MAX UNITS
866 1019 1171
ns
325 382 439
210 270 330
ns
300 360
ns
2
ms
15
22
kHz
OUT_ Overvoltage Trip
Threshold (PGOOD Pulled Low
Above This Level)
With respect to error comparator threshold 13
16
19
%
OUT_Overvoltage Fault
Propagation Delay
tOVP
VFB_ forced 50mV above trip threshold
10
Fs
OUT_ Undervoltage Protection
Trip Threshold
With respect to error comparator threshold 65
70
75
%
OUT_ Output Undervoltage
Fault Propagation Delay
tUVP
10
Fs
PGOOD Lower Trip Threshold
With respect to error comparator threshold,
falling edge, hysteresis = 15mV
-350
-250
-150
mV
PGOOD Propagation Delay
tPGOOD
OUT5 or OUT3 forced 50mV beyond
PGOOD trip threshold, falling edge
10
Fs
PGOOD Output Low Voltage
PGOOD low impedance, ON5 = ON3 =
GND, ISINK = 4mA
0.3
V
PGOOD Leakage Current
Fault Reset Timer
MAIN SMPS CURRENT LIMIT
ILIM_ Adjustment Range
ILIM_ Leakage Current
Valley Current-Limit Threshold
(Adjustable)
Ultrasonic Negative
Current-Limit Threshold
IPGOOD
VLIM_ (VAL)
INEG(US)
PGOOD high impedance, SMPS in
regulation, PGOOD forced to 5.5V,
TA = +25°C
TA = +25°C
VAGND - VLX_
VILIM_ = 0.5V
VILIM_ = 1.00V
VILIM_ = 2.10V
1
FA
7
10
ms
0.2
2.1
V
-0.1
+0.1
FA
40
50
60
87
100
113
mV
184 210 236
72
mV
Current-Limit Threshold
(Zero Crossing)
VZX
VAGND - VLX_, SKIP = VCC or GND,
VILIM = 1V
1.5
mV
4 _______________________________________________________________________________________
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