Datasheet

MAX745
_______________________________________________________________________________________ 3
Switch-Mode Lithium-Ion
Battery Charger
Note 1: When V
SETI
= 0V, the battery charger turns off.
ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= 18V, V
BATT
= 8.4V, T
A
= 0°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS
(V
DCIN
= 18V, V
BATT
= 8.4V, T
A
= -40°C to +85°C, unless otherwise noted. Limits over temperature are guaranteed by design.)
6.0V < V
DCIN
< 24V
6.0V < V
DCIN
< 24V, no load
Output high or low
Output high or low
CONDITIONS
mV165 205
CS to BATT Full-Scale
Current-Sense Voltage
Not including VADJ resistors %-1.0 +1.0Absolute Voltage Accuracy
V4.14 4.26REF Output Voltage
V5.10 5.70VL Output Voltage
Ω
14DLO On-Resistance
Ω
7DHI On-Resistance
kHz260 340Oscillator Frequency
UNITSMIN TYP MAXPARAMETER
IBAT Compliance Voltage Range 02V
V
IBAT
= 2V
IBAT Output Current vs.
Current-Sense Voltage
0.9 µA/mV
Charger in voltage-regulation mode,
V
STATUS
= 5V
STATUS Output Leakage Current 1 µA
Charger in current-regulation mode,
STATUS sinking 1mA
STATUS Output Low Voltage 0.2 V
THM/SHDN Falling Threshold
2.01 2.1 2.19 V
THM/SHDN Rising Threshold
2.20 2.3 2.34 V
1.1V < V
CCI
< 3.5VCCV Clamp Voltage with Respect to CCI
PARAMETER MIN TYP MAX UNITS
GMV Amplifier Output Current ±130 µA
GMI Amplifier Transconductance 200 µA/V
GMI Amplifier Output Current ±320 µA
CCI Clamp Voltage with Respect to CCV 25 80 200 mV
25 80 200 mV
CELL0, CELL1 Input Bias Current -1 +1 µA
SETI Input Voltage Range 0V
REF
V
SETI, VADJ Input Bias Current -10 +10 nA
VADJ Adjustment Range 10 %
CONDITIONS
VADJ Input Voltage Range 0 V
REF
1.1V < V
CCV
< 3.5V
V
(Note 1)
SWITCHING REGULATOR (Note 1)
SUPPLY AND REFERENCE
GMV Amplifier Transconductance 800 µA/V
CONTROL INPUTS/OUTPUTS
ERROR AMPLIFIERS