MAX1870A Ver la hoja de datos (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 (continued)
(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 = 0°C to +85°C, unless otherwise noted. Typical
values are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
CSIN Input Current
DCIN = 0
ICTL = 0
0.1
2
0.1
2
µA
ICTL = REFIN
0.1
2
ICTL Power-Down-Mode
Threshold Voltage
REFIN / REFIN / REFIN /
V
100
55
32
ICTL Input Bias Current
0 < VICTL < VREFIN
ICTL = DCIN = 0, VREFIN = 3.6V
INPUT-CURRENT REGULATION
Charger-Input Current-Limit
Accuracy (VCSSP - VCSSN)
CSSS = CSSP
CLS = REF
CLS = REF x 0.845
System-Input Current-Limit
Accuracy (VCSSP - VCSSS)
CSSN = CSSP
CLS = REF
CLS = REF x 0.845
-1
+1
µA
-1
+1
97
105 113
mV
81
88
95
97
105 113
mV
81
88
95
CSSP/CSSS/CSSN Input Voltage
Range
8
28
V
CSSP Input Current
CSSS/CSSN Input Current
CLS Input Range
VCSSP = VCSSN = VCSSS = VDCIN = 6V
VCSSP = VCSSN = VCSSS = VDCIN = 8V, 28V
VCSSP = VCSSN = VCSSS = VDCIN = 6V
VCSSP = VCSSN = VCSSS = VDCIN = 8V, 28V
CLS Input Bias Current
CLS = REF
IINP Transconductance
VCSSP - VCSSS = 102mV, CSSN = CSSP
IINP Output Current
VCSSP - VCSSN = 200mV, VIINP = 0V
VCSSP - VCSSS = 200mV, VIINP = 0V
IINP Output Voltage
VCSSP - VCSSN = 200mV, IINP float
VCSSP - VCSSS = 200mV, IINP float
SUPPLY AND LINEAR REGULATOR
-1
700
-1
-1
VREF / 2
-1
2.5
2.8
350
350
3.5
3.5
+1
1200
+1
+1
VREF
+1
3.1
µA
µA
V
µA
µA/mV
µA
V
DCIN Input Voltage Range
DCIN Undervoltage Lockout
DCIN Quiescent Current
BATT Input Voltage Range
BATT Input Bias Current
LDO Output Voltage
LDO Load Regulation
LDO Undervoltage Lockout
DCIN falling
DCIN rising
8.0V < VDCIN < 28V
DCIN = 0
VBATT = 2V to 19V
No load
0 < ILDO < 10mA
VDCIN = 8V, LDO rising
8
28
V
4
6.2
V
6.3 7.85
3.5
6
mA
0
19
V
0.1
1
µA
300 500
5.3
5.4
5.5
V
70
150
mV
4.00
5.0
5.25
V
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