LTC4040_15 Datasheet, PDF (5/26 Pages) Linear Technology – 2.5A Battery Backup Power Manager

LTC4040
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C. (Note 3) V_IN = 5V, V_BAT = 3.6V, R_PROG = 2k, unless otherwise noted.
SYMBOL PARAMETER
Open-Drain Output (CHRG, RST, FAULT)
Pin Leakage Current
Pin Output Low Voltage
Overvoltage Protection
V_OV(CUTOFF) Overvoltage Protection Threshold
V_OVGT
IGATE Output Voltage Active
V_OVGT(LOAD) IGATE Voltage Under Load
I_OVSNSQ OVSNS Quiescent Current
OVSNS Quiescent Current at Shutdown
IGATE Time to Reach Regulation
CONDITIONS
V = 5V
I = 5mA
Rising Threshold, R_OVSNS = 6.2k
Input Voltage < V_OV(CUTOFF)
5V Through 6.2k Into OVSNS, I_IGATE = 1µA
V_OVSNS = 5V
BSTOFF = H, CHGOFF = H
C_IGATE = 2.2nF
MIN TYP MAX UNITS
1
µA
65
mV
6.1 6.4 6.7
V
1.88 • 12
V
V_OVSNS
8
8.6
V
40
µA
25
µA
3.5
ms
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 3: The LTC4040E is tested under pulsed load conditions such that
T_J ≈ T_A. The LTC4040E is guaranteed to meet performance specifications
from 0°C to 85°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process control. The
LTC4040I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The junction temperature (T_J in °C) is calculated from
the ambient temperature (T_A, in °C) and power dissipation (P_D, in watts)
according to the formula:
T_J = T_A + (P_D • θ_JA)
where the package thermal impedance θ_JA = 43°C/W.
Note that the maximum ambient temperature consistent with these
specifications is determined by specific operating conditions in
conjunction with board layout, the rated package thermal resistance and
other environmental factors.
For more information www.linear.com/LTC4040
4040fa
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