Max1870a step-up/step-down li+ battery charger, Electrical characteristics (continued) – Rainbow Electronics MAX1870A User Manual
Page 3
MAX1870A
Step-Up/Step-Down
Li+ Battery Charger
_______________________________________________________________________________________
3
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DCIN = 0
0.1
2
ICTL = 0
0.1
2
CSIN Input Current
ICTL = REFIN
0.1
2
µA
ICTL Power-Down-Mode
Threshold Voltage
REFIN /
100
REFIN /
55
REFIN /
32
V
0 < V
ICTL
< V
REFIN
-1
+1
ICTL Input Bias Current
ICTL = DCIN = 0, V
REFIN
= 3.6V
-1
+1
µA
INPUT-CURRENT REGULATION
CLS = REF
97
105
113
Charger-Input Current-Limit
Accuracy (V
CSSP
- V
CSSN
)
CSSS = CSSP
CLS = REF x 0.845
81
88
95
mV
CLS = REF
97
105
113
System-Input Current-Limit
Accuracy (V
CSSP
- V
CSSS
)
CSSN = CSSP
CLS = REF x 0.845
81
88
95
mV
CSSP/CSSS/CSSN Input Voltage
Range
8
28
V
V
CSSP
= V
CSSN
= V
CSSS
= V
DCIN
= 6V
-1
+1
CSSP Input Current
V
CSSP
= V
CSSN
= V
CSSS
= V
DCIN
= 8V, 28V
700
1200
µA
V
CSSP
= V
CSSN
= V
CSSS
= V
DCIN
= 6V
-1
+1
CSSS/CSSN Input Current
V
CSSP
= V
CSSN
= V
CSSS
= V
DCIN
= 8V, 28V
-1
+1
µA
CLS Input Range
V
REF
/ 2
V
REF
V
CLS Input Bias Current
CLS = REF
-1
+1
µA
IINP Transconductance
V
CSSP
- V
CSSS
= 102mV, CSSN = CSSP
2.5
2.8
3.1
µA/mV
V
CSSP
- V
CSSN
= 200mV, V
IINP
= 0V
350
IINP Output Current
V
CSSP
- V
CSSS
= 200mV, V
IINP
= 0V
350
µA
V
CSSP
- V
CSSN
= 200mV, IINP float
3.5
IINP Output Voltage
V
CSSP
- V
CSSS
= 200mV, IINP float
3.5
V
SUPPLY AND LINEAR REGULATOR
DCIN Input Voltage Range
8
28
V
DCIN falling
4
6.2
DCIN Undervoltage Lockout
DCIN rising
6.3
7.85
V
DCIN Quiescent Current
8.0V < V
DCIN
< 28V
3.5
6
mA
BATT Input Voltage Range
0
19
V
DCIN = 0
0.1
1
BATT Input Bias Current
VBATT = 2V to 19V
300
500
µA
LDO Output Voltage
No load
5.3
5.4
5.5
V
LDO Load Regulation
0 < I
LDO
< 10mA
70
150
mV
LDO Undervoltage Lockout
V
DCIN
= 8V, LDO rising
4.00
5.0
5.25
V
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 2, V
DCIN
= V
CSSP
= V
CSSN
= V
CSSS
= V
VHP
= 18V, V
BATT
= V
CSIP
= V
CSIN
= V
BLKP
= 12V, V
REFIN
= 3.0V, V
ICTL
=
0.75 x V
REFIN
, VCTL = LDO, CELLS = FLOAT, GND = PGND = 0, V
DLOV
= 5.4V,
T
A
= 0°C to +85°C, unless otherwise noted. Typical
values are at T
A
= +25°C.)