MAX1538 Datasheet, PDF (5/22 Pages) Maxim Integrated Products – Power-Source Selector for Dual-Battery Systems

Power-Source Selector for
Dual-Battery Systems
ELECTRICAL CHARACTERISTICS
(V_BATA = V_BATB = V_CHGIN = 16.8V, C_VDD = 1µF, V_MINVA = V_MINVB = 0.93V, V_EXTLD = V_ADPIN = 28V, V_CHRG = V_BATSEL = V_RELRN = 0,
C_ADPPWR = C_REVBLK = C_ADPBLK = C_DISBAT = C_DISA = C_DISB = C_CHGA = C_CHGB = 4.7nF, TA = -40°C to +85°C, unless otherwise noted.)
(Note 2)
PARAMETER
ADPIN, EXTLD Supply Voltage
Range
CONDITIONS
CHGIN, BATA, BATB, and
BATSUP Supply Voltage Range
V_ADPIN = highest,
V_ADPPWR = high
ADPIN, BATA, BATB, BATSUP
Quiescent Current (Current from
the Highest Voltage Supply)
ADPIN Quiescent Current (ADPIN
Current When Not the Highest
Voltage)
V_BATA = 4.75V to 19V,
V_BATB = 4.75V to 19V,
V_BATSUP = 4.75V to 19V,
V_ADPIN = 4.75V to 28V,
no external load at V_DD
V_ADPIN = 4.75V to 18V,
no external load at V_DD
V_ADPIN = highest,
V_ADPPWR = low
V_BATA = highest, V_DISA = high
V_BATA = highest, V_DISA = low
V_BATB = highest, V_DISB = high
V_BATB = highest, V_DISB = low
V_BATSUP = highest
V_ADPPWR = high
V_ADPPWR = low
BATA Quiescent Current (BATA
Current When Not the Highest
Voltage)
V_BATA = 4.75V to 19V,
no external load at V_DD
V_DISA = high
V_DISA = low
BATB Quiescent Current (BATB
Current When Not the Highest
Voltage)
V_BATB = 4.75V to 19V,
no external load at V_DD
V_DISB = high
V_DISB = low
EXTLD Quiescent Current
CHGIN Quiescent Current
Adapter selected (REVBLK or ADPBLK pins low)
Adapter not selected (REVBLK and ADPBLK pins high)
AC or airline state (CHGA, CHGB, and DISBAT pins high)
Charge state (CHGA or CHGB pin low, DISBAT pin high)
Discharge or relearn state (CHGA or CHGB pin low,
DISBAT pin low)
LINEAR REGULATOR
V_DD Output Voltage
V_DD Undervoltage Lockout
COMPARATORS
I_VDD = 0 to 100µA
Rising edge, relative to regulation point
ACDET, AIRDET Input Voltage
Range
ACDET, AIRDET Trip Threshold Input falling
MINV_ Operating Voltage Range
BAT_ Minimum Voltage Trip
Threshold
V_{BAT_} falling
V_{MINV_} = 0.93V
V_{MINV_} = 1.5V
V_{MINV_} = 2.6V
MIN
4.75
4.75
3.270
-60
0
1.94
0.93
4.59
7.4
12.86
MAX UNITS
28.00
V
19.00
V
50
54
42
µA
50
42
50
40
1
µA
9
7.5
µA
16
7.5
µA
16
9.5
µA
1.0
1.5
10
µA
18.5
3.330
V
-10
mV
5.5
V
2.06
V
2.60
V
4.72
7.6
V
13.14
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