Datasheet

Integrated Charger, Dual Main Step-Down
Controllers, and Dual LDO Regulators
MAX17085B
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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, no load on LDO5, LDO3, OUT5, OUT3, and REF, V
CC
= 5V, ON3 = ON5 = V
CC
, V
DCIN
= V
LXC
= V
CSSP
= V
CSSN
= 19V, V
BSTC
- V
LXC
= 5V, V
BATT
= V
CSIP
= V
CSIN
= 12.6V, V
VCTL
= V
ISET
= 1.8V, CELLS = open, T
A
= -40°C to +85°C, unless
otherwise noted.) (Note 4)
Note 3: On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = PGND, V
BST
= 5V,
and a 500pF capacitor from DH to LX to simulate external MOSFET gate capacitance. Actual in-circuit times may be dif-
ferent due to MOSFET switching speeds.
Note 4: Specifications to T
A
= -40°C are guaranteed by design and not production tested.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
INPUT SOURCE-CURRENT REGULATION
Input Source-Current Limit
Threshold
V
CSS
V
CSSP
- V
CSSN
58.5 61.5 mV
-2.5 +2.5 %
CSSP/CSSN Input-Voltage Range 5 26 V
IINP Current-Sense Amplifier
Voltage Gain
G
IINP
59.9 60.1 V/V
IINP Output-Voltage Range 0 4 V
IINP Accuracy
V
CSSP
- V
CSSN
= 60mV -2 +2
%
V
CSSP
- V
CSSN
= 40mV -3 +3
V
CSSP
- V
CSSN
= 20mV -4 +4
IINP Gain Error
Measured at V
CSSP
- V
CSSN
= 60mV and
V
CSSP
- V
CSSN
= 20mV
-1.5 +1.5 %
IINP Offset Error
Measured at V
CSSP
- V
CSSN
= 60mV and
V
CSSP
- V
CSSN
= 20mV
-0.65 +0.65 mV
ACIN, ACOK, AND ACOV
ACOK Detect Threshold
V
ACINOK
Measured at ACIN rising, hysteresis = 40mV
(typ)
1.47 1.53 V
-2 +2 %
ACOV Detect Threshold V
ACINOV
Measured at ACIN rising, hysteresis = 40mV
(typ)
2.05 2.15 V
-2.38 +2.38 %
ACOK Sink Current
V
ACOK
= 0.4V, V
ACIN
= 1.7V
1 mA
ADAPTER PRESENT DETECTION
Adapter Absence Detect
Threshold
V
DCIN
- V
BATT
, V
DCIN
falling 0 200 mV
Adapter Detect Threshold V
DCIN
- V
BATT
, V
DCIN
rising 300 600 mV
CHARGE-PUMP MOSFET DRIVER
PDSL Gate-Driver Output
Voltage High
V
PDSL_H
V
DCIN
= 19V
V
DCIN
+
5.3
V