MAX1870A データシートの表示（PDF） - Maxim Integrated
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MAX1870A Datasheet PDF : 32 Pages
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Step-Up/Step-Down
Li+ Battery Charger
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 2, VDCIN = VCSSP = VCSSN = VCSSS = VVHP = 18V, VBATT = VCSIP = VCSIN = VBLKP = 12V, VREFIN = 3.0V, VICTL =
0.75 x VREFIN, VCTL = LDO, CELLS = FLOAT, GND = PGND = 0, VDLOV = 5.4V, TA = -40°C to +85°C.) (Note 1)
PARAMETER
SUPPLY AND LINEAR REGULATOR
CONDITIONS
DCIN Input Voltage Range
DCIN Undervoltage Lockout
DCIN Quiescent Current
BATT Input Voltage Range
BATT Input Bias Current
LDO Output Voltage
LDO Undervoltage Lockout
REFERENCE
REF Output Voltage
REF Load Regulation
DCIN falling
DCIN rising
8.0V < VDCIN < 28V
VBATT = 2V to 19V
No load
VDCIN = 8V, LDO rising
IREF = 0µA
0 < IREF < 500µA
REF Undervoltage-Lockout Trip
Point
VREF falling
REFIN Input Range
REFIN UVLO Rising
REFIN Input Bias Current
SWITCHING REGULATOR
VDCIN = 18V
Cycle-by-Cycle Step-Up Maximum
Current-Limit Sense Voltage
VDCIN = 12V, VBATT = 16.8V
MIN TYP MAX UNITS
8
28
V
4
V
7.85
6
mA
0
19
V
500
µA
5.3
5.5
V
4.00
5.25
V
4.060
2.5
4.132
V
10
mV
3.9
V
3.6
V
2.2
V
100
µA
130
170
mV
Cycle-by-Cycle Step-Down
Maximum Current-Limit Sense
Voltage
VDCIN = 19V, VBATT = 16.8V
130
170
mV
Step-Down On-Time
Minimum Step-Down Off-Time
Step-Up Off-Time
Minimum Step-Up On-Time
MOSFET DRIVERS
VHP - VHN Output Voltage
VHN Load Regulation
DHI On-Resistance High
DHI On-Resistance Low
VHP Input Bias Current
BLKP Input Bias Current
DLOV Supply Current
DBST On-Resistance High
DBST On-Resistance Low
VDCIN = 18V, VBATT = 16.8V
VDCIN = 18V, VBATT = 16.8V
VDCIN = 12V, VBATT = 16.8V
VDCIN = 12V, VBATT = 16.8V
8V < VVHP < 28V, no load
0 < IVHN < 10mA
ISOURCE = 10mA
ISINK = 10mA
VDCIN = 18V
VICTL = VREFIN = 3.3V
DBST low
ISOURCE = 10mA
ISINK = 10mA
2.2
2.6
µs
0.15
0.50
µs
1.6
2.0
µs
0.15
0.40
µs
4.5
5.5
V
150
mV
5
Ω
3
Ω
2
mA
400
µA
10
µA
5
Ω
3
Ω
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