Datasheet

LTC4215/LTC4215-2
4
4215fe
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
Comparator Inputs
V
ON(TH)
ON Pin Threshold Voltage V
ON
Rising
l
1.210 1.235 1.26 V
ΔV
ON(HYST)
ON Pin Hysteresis
l
60 128 180 mV
I
ON(IN)
ON Pin Input Current V
ON
= 1.2V
l
0
±1
µA
V
EN(TH)
EN Input Threshold V
EN
= Rising
l
1.215 1.235 1.255 V
ΔV
EN(HYST)
EN Hysteresis
l
50 128 200 mV
I
EN
EN Pin Input Current EN = 3.5V
l
0
±1
µA
V
OV(TH)
OV Pin Threshold Voltage V
OV
Rising
l
1.215 1.235 1.255 V
ΔV
OV(HYST)
OV Pin Hysteresis
l
10 30 40 mV
I
OV(IN)
OV Pin Input Current V
OV
= 1.8V
l
0
±1
µA
V
UV(TH)
UV Pin Threshold Voltage V
UV
Rising
l
1.215 1.235 1.255 V
ΔV
UV(HYST)
UV Pin Hysteresis
l
60 80 100 mV
I
UV(IN)
UV Pin Input Current V
UV
= 1.8V
l
0
±1
µA
V
UV(RTH)
UV Pin Reset Threshold Voltage V
UV
Falling
l
0.33 0.4 0.47 V
ΔV
UV(RHYST)
UV Pin Reset Threshold Hysteresis
l
60 125 210 mV
V
FB
Foldback Pin Power Good Threshold FB Rising
l
1.215 1.235 1.255 V
ΔV
FB(HYST)
FB Pin Power Good Hysteresis
l
3815 mV
I
FB
Foldback Pin Input Current FB = 1.8V
l
0
±1
µA
V
GPIO(TH)
GPIO Pin Input Threshold V
GPIO
Rising
l
0.8 1 1.2 V
Other Pin Functions
V
GPIO(OL)
GPIO Pin Output Low Voltage I
GPIO
= 5mA
l
0.25 0.5 V
I
GPIO(OH)
GPIO Pin Input Leakage Current V
GPIO
= 15V
l
0
±1
µA
I
SOURCE
SOURCE Pin Input Current SOURCE = 15V
l
40 80 120 µA
t
P(GATE)
Input (ON, OV, UV, EN) to GATE Off
Propagation Delay
l
35 µs
t
D(GATE)
Turn-On Delay ON
UV, OV, EN
Overcurrent Auto-Retry
l
l
l
50
2.5
1
100
5
2
150
75
µs
ms
s
V
TIMERL(TH)
Timer Low Threshold
l
0.17 0.2 0.23 V
V
TIMERH(TH)
Timer High Threshold
l
1.2 1.235 1.26 V
I
TIMER(UP)
TIMER Pin Pull-Up Current
l
–80 –100 –120 µA
I
TIMER(DOWN)
TIMER Pin Pulldown Current for OC Auto-Retry
l
1.4 2 2.6 µA
I
TIMER(UP/DOWN)
TIMER Current Up/Down Ratio
l
40 50 60
I
SS
Soft-Start Ramp Pull-Up Current Ramping
Waiting for GATE to Slew
l
l
–7.5
–0.4
–10
–0.7
–12.5
–1.0
µA
µA
ADC
RES Resolution (No Missing Codes)
l
8 Bits
INL Integral Nonlinearity V
DD
– SENSE (Note 5)
SOURCE
ADIN
l
l
l
–2
–1.25
–1.25
0.5
0.2
0.2
2
1.25
1.25
LSB
LSB
LSB
V
OS
Offset Error (Note 4) V
DD
– SENSE
SOURCE
ADIN
l
l
l
±2.0
±1.0
±1.0
LSB
LSB
LSB