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MAX1540A Datasheet, PDF (7/49 Pages) Maxim Integrated Products – Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator
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Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, VCC = VDD = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, TA = 0°C to +85°C, unless otherwise noted. Typical
values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Four-Level Input Logic Levels
Four-Level Logic Input Current
TON, OVP/UVP,
LSAT, SKIP,
FBLANK
High
Open
REF
Low
TON, OVP/UVP, LSAT, SKIP, FBLANK
forced to GND or VCC
VCC -
0.4V
3.15
1.65
-3
3.85
V
2.35
0.5
+3
µA
ELECTRICAL CHARACTERISTICS
(V+ = 15V, VCC = VDD = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, TA = -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
INPUT SUPPLIES (Note 1)
Input Voltage Range
VIN
MAX1540A: battery voltage, V+ > VLDOOUT 5.5
MAX1541: battery voltage, V+ > VLDOOUT
2
VBIAS VCC, VDD (MAX1541)
4.5
VLDOIN
MAX1541: LDO input supply,
VLDOIN > VLDOOUT
4.5
Quiescent Supply Current (VCC)
FB1 and FB2 forced above the regulation
point, LSAT = GND
ICC
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = VCC, VLSAT > 0.5V
Quiescent Supply Current
(VDD, MAX1541 Only)
IDD
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = VCC
MAX UNITS
28
28
5.5
V
28
1.5
mA
1.8
5
µA
Quiescent Supply Current (V+)
MAX1540A: FB1 and FB2 forced above the
regulation point, ON1 or ON2 = VCC,
IV+
VLDOON = V+ = 28V
MAX1541: ON1 or ON2 = VCC, VLDOON =
V+ = 28V
150
µA
40
Quiescent Supply Current
(LDOIN, MAX1541 Only)
Standby Supply Current (VDD)
Standby Supply Current
(VDD, MAX1541 Only)
Standby Supply Current (V+)
Standby Supply Current
(LDOIN, MAX1541 Only)
ILDOIN
FB1 and FB2 forced above the regulation
point, ON1 or ON2 = VCC,
VLDOON = V+ = 28V
ON1 = ON2 = GND, VLDOON = V+ = 28V
ON1 = ON2 = GND, VLDOON = V+ = 28V
MAX1540A: ON1 = ON2 = GND, LDOON =
V+ = 28V, VCC = 0 or 5V
MAX1541: ON1 = ON2 = GND, LDOON =
V+ = 28V, VCC = VDD = 0 or 5V
ON1 = ON2 = GND, VLDOON = V+ = 28V
110
µA
5
µA
5
µA
105
µA
5
100
µA
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