Datasheet

LTC4219
3
4219fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
DD
= 12V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC Characteristics
V
DD
Input Supply Range
l
2.9 15 V
I
DD
Input Supply Current MOSFET On, No Load
l
1.6 3 mA
V
DD(UVL)
Input Supply Undervoltage Lockout V
DD
Rising
l
2.65 2.73 2.85 V
V
OUT(PGTH)
Output Power Good Threshold LTC4219-12, V
OUT
Rising
l
10.2 10.5 10.8 V
LTC4219-5, V
OUT
Rising
l
4.2 4.35 4.5 V
DV
OUT(PGHYST)
Output Power Good Hysteresis LTC4219-12
l
127 170 213 mV
LTC4219-5
l
53 71 89 mV
I
OUT
OUT Pin Leakage Current V
OUT
= V
GATE
= 0V, V
DD
= 15V
l
0±150 µA
V
OUT
= V
GATE
= 12V, LTC4219-12
l
50 70 90 µA
V
OUT
= V
GATE
= 5V, LTC4219-5
l
26 36 46.5 µA
DV
GATE
/Dt
GATE Pin Turn-On Ramp Rate
l
0.15 0.3 0.55 V/ms
R
ON
MOSFET + Sense Resistor On Resistance
l
15 33 50
mW
I
LIM(TH)
Current Limit Threshold V
FB
= 1.23V
l
5.0 5.6 6.1 A
V
FB
= 0V
l
1.2 1.5 1.8 A
V
FB
= 1.23V, R
SET
= 20kΩ
l
2.6 2.9 3.3 A
Inputs
I
IN
EN1, EN2 Pin Input Current V
IN
= 1.2V
l
0±1 µA
R
FB
FB Pin Input Resistance LTC4219-12
LTC4219-5
l
l
13
20
18
29
23
37
k
k
V
TH
EN1, EN2, FB Pin Threshold Voltage V
IN
Rising
l
1.21 1.235 1.26 V
DV
EN(HYST)
EN1, EN2 Pin Hysteresis
l
50 80 110 mV
DV
FB(HYST)
FB Pin Power Good Hysteresis
l
10 20 30 mV
R
ISET
I
SET
Pin Output Resistor
l
19 20 21
kW