Rainbow Electronics MAX1870A - Manual (Page 5)

MAX1870A
Step-Up/Step-Down
Li+ Battery Charger
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PARAMETER CONDITIONS MIN TYP MAX UNITS
V CLS = REF, V CSSP - V CSSN = 102mV, V CSSP = V CSSS 1.2 1.7 2.2 GMS Amplifier Loop
Transconductance
V CLS = REF, V CSSP - V CSSS = 102mV, V CSSP = V CSSN 1.2 1.7 2.2
µA/mV
VCTL = REFIN, V BATT = 15.8V 50
CCV Output Current
VCTL = REFIN, V BATT = 17.8V -50
µA
ICTL = REFIN, V CSIP - V CSIN = 0mV 150
CCI Output Current
ICTL = REFIN, V CSIP - V CSIN = 150mV -150
µA
CLS = REF, V CSSP = V CSSN , V CSSP = V CSSS 100
CCS Output Current CLS = REF, V CSSP - V CSSN = 200mV,
V CSSP - V CSSS = 200mV
-100
µA
CCI/CCS/CCV Clamp Voltage
1.1V < V CCV < 3.5V, 1.1V < V CCS < 3.5V,
1.1V < V CCI < 3.5V
100 300 500 mV
LOGIC LEVELS
ASNS Output-Voltage Low V IINP = GND, I SINK = 1mA 0.4 V
ASNS Output-Voltage High V IINP = 4V, I SOURCE = 1mA
LDO -
0.5
V
V IINP rising 1.1 1.15 1.2 V
ASNS Current Detect
Hysteresis 50 mV
V SHDN = 0 to V REFIN -1 +1
SHDN Input Bias Current
DCIN = 0, V REFIN = 5V, V SHDN = 0 to V REFIN -1 +1
µA
SHDN Threshold SHDN falling, V
REFIN = 2.8V to 3.6V 22 23.5 25
% of
REFIN
SHDN Hysteresis 1
% of
REFIN
CELLS Input Low Voltage 0.75 V
CELLS Float Voltage 40 50 60
% of
REFIN
CELLS Input High Voltage
RE FIN -
0.75V
V
CELLS Input Bias Current CELLS = 0 to REFIN -2 +2 µA
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.)