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MAX1535A Datasheet, PDF (5/39 Pages) Maxim Integrated Products – Highly Integrated Level 2 SMBus Battery Charger
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Highly Integrated Level 2 SMBus
Battery Charger
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VDD = 3.3V, ACIN = PGND = GND, LDO = DLOV,
VMAX = IMAX = REF, CLDO = 1µF, CDHIV = 0.1µF, CREF = 1µF, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless other-
wise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
PDL-to-PDS Switchover Time in
Relearn Mode
PDS and PDL are unloaded
MAXIMUM CHARGE-VOLTAGE SETTING
VBATT to VVMAX Ratio
VMAX = 2V, ChargeVoltage () = 0x4B00
VMAX Input Voltage Range
VMAX Input Bias Current
0 < VVMAX < VREF
MAXIMUM CHARGE-CURRENT SETTING
ICHARGE to VIMAX Ratio
IMAX Input Voltage Range
VIMAX = 0.8V, ChargeCurrent () = 0x1F80
IMAX Input Bias Current
THERMISTOR COMPARATOR
0 < VIMAX < VREF
Thermistor Overrange Threshold
Thermistor Cold Threshold
Thermistor Hot Threshold
VDD = 2.7V to 5.5V, THM falling
VDD = 2.7V to 5.5V, THM falling
VDD = 2.7V to 5.5V, THM falling
Thermistor Underrange
Threshold
VDD = 2.7V to 5.5V, THM falling
4
10
16
µs
4.95
5.0 5.05
V/V
0
VREF
V
1
µA
4.75
5
5.25
A/V
0
VREF
V
1
µA
89.5
91
92.5 % of VDD
73.5
75
76.5 % of VDD
21.5
23
24.5 % of VDD
3.5
5
6.5 % of VDD
Thermistor Comparator
Hysteresis
All four comparators, VDD = 2.7V to 5.5V
SMBus INTERFACE LEVEL SPECIFICATIONS (VDD = 2.7V TO 5.5V)
SDA/SCL Input Low Voltage
VDD = 2.7V to 5.5V
SDA/SCL Input High Voltage
VDD = 2.7V to 5.5V
SDA/SCL Input Bias Current
VDD = 2.7V to 5.5V
SDA, INT Output Sink Current
VSDA = 0.4V
INT Output High Leakage Current V INT = 5.5V
INT Output Low Voltage
I INT = 1mA
SMBus TIMING SPECIFICATIONS (VDD = 2.7V TO 5.5V)
SMBus Frequency
SMBus Free Time
Start Condition Setup Time from
SCL
50
mV
0.8
V
2.1
V
-1
+1
µA
6
mA
1
µA
25
200
mV
10
100
kHz
4.7
µs
4.7
µs
Start Condition Hold Time from
SCL
4
µs
Stop Condition Setup Time from
SCL
SDA Hold Time from SCL
SDA Setup Time from SCL
SCL Low Timeout
(Note 1)
4
µs
300
ns
250
ns
25
35
ms
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