LTC4419CDD Datasheet, PDF (3/20 Pages) Linear Integrated Systems – 18V Dual Input Micropower PowerPath Prioritizer

LTC4419
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V1 = 3.6V, V2 = 3.6V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Supply Voltage and Currents
V1, V2
Operating Voltage Range
l 1.8
18
V
I_V1
V1 Current, V1 Powering OUT
V1 Current, V2 Powering OUT
I_OUT = 0, V1 = 8.4V, V2 = 3.6V
l
3.6
6.3
µA
V1 = 8.4V, V2 = 3.6V
l
500 800
nA
I_V2
V2 Current, V2 Powering OUT
V2 Current, V1 Powering OUT
V2 Current in Freshness Seal Mode
I_OUT = 0, V1 = 3.6V, V2 = 8.4V
l
3.3
6
µA
V1 = 3.6V, V2 = 8.4V
l
320 650
nA
V1 = GND, V2 = 5V
l
120 220
nA
R_ON
Switch Resistance
t_VALID(V1) Input Qualification Time
Input Comparators
V1 = V2 = 5V, I_OUT = –100mA
V1 Rising, ADJ Rising
l1
2
5
Ω
l 34
64
94
ms
V_THA
ADJ Threshold
V_HYSTA
ADJ Comparator Hysteresis
V_THC
CMP1, CMP2 Threshold
V_HYSTC
CMP1, CMP2 Hysteresis
t_PDA
ADJ Comparator Falling Response Time
t_PDC
CMP1, CMP2 Comparator Response Times
Power Path Function
ADJ Falling
ADJ Rising
CMP1, CMP2 Falling
CMP1, CMP2 Rising
10% Overdrive
20% Overdrive
l 1.032 1.047 1.062
V
l 30
50
70
mV
l 0.378 0.387 0.396
V
l 7.5
10 12.5
mV
l4
7.3
12
µs
l
30
65
µs
I_LIM
Output Current Limit
V_REV
Reverse Comparator Threshold
t_SWITCH
Break-Before-Make Switchover Time
I/O Specifications
V1, V2 = 8.4V
l 0.5
1.1
1.6
A
(V1, V2) – V_OUT for Power Path Turn-On l 25
50
75
mV
V1 = V2 = 5V, I_OUT < –10mA
l1
2.5
5
µs
V_OL
Output Voltage Low, CMPOUT1, CMPOUT2
I = 100µA
and V2ON
I = 1mA
l
15
50
mV
l
120 250
mV
V_OH
V2ON Output High Voltage
I_OH
CMPOUT1, CMPOUT2 and V2ON,
Output High Leakage
I = –1µA, V2 = 5V
l 1.05 1.65 2.3
V
CMPOUT1, CMPOUT2, V2ON = 18V
l
±50 ±150
nA
I_PU(V2ON) V2ON Pull-Up Current
V2 = 5V, ADJ = 0V, V2ON = 0V
l –2.7 –5
–8
µA
I_LEAK
ADJ, CMP1, CMP2 Leakage Current
ADJ, CMP1, CMP2 = 0V, 1.5V
l
±1
±5
nA
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: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 3: These pins can be tied to voltages down to –5V through a resistor
that limits the current to less than –1mA.
Note 4: The LTC4419 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 5: The LTC4419 is tested under pulsed load conditions such that
T_J ≈ T_A. 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)
4419f
For more information www.linear.com/LTC4419
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