LTC4417
4
4417f
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 device pins are positive; all currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specified.
Note 3: Each V1 to V3 supply current specification includes current into
the corresponding VS1 to VS3 for the channel(s) being tested.
Note 4: Specification represents the total diode-ORed current of V1 to V3
input supplies, selecting the highest voltage as the input source. If two
input supplies are similar in voltage and higher than the remaining input
supply voltage, the current is split evenly between the two higher voltage
supplies. Current is split evenly if all supplies are equal.
Note 5: Falling edge of G1 to G3 measured from 11V to 8V.
Note 6: Rising edge of G1 to G3 measured from 7V to 11V.
Note 7: UV1 driven below V
OV,UV(THR)
. Time is measured from respective
rising edge G1 to G3 crossing (VS1 to VS3) – 3V to next valid priority
falling edge G1 to G3 crossing (VS1 to VS3) – 3V.
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. For all tests, V1 = VS1, V2 = VS2, V3 = VS3. Unless otherwise noted,
V1 = V2 = V3 = V
OUT
= 12V, HYS = GND.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Input/Output Pins
V
VALID(OL)
VALID1 to VALID3 Output Low Voltage I = 1mA, (V1 to V3) = 2.5V, V
OUT
= 0V
l
0.25 0.55 V
t
pVALID(OFF)
VALID1 to VALID3 Delay OFF From OV/UV Fault
l
5 8 13 µs
V
CAS(OH)
CAS Output High Voltage I = –1µA
l
1.4 2 3 V
V
CAS(OL)
CAS Output Low Voltage I = 1mA
l
0.2 0.4 V
I
CAS
CAS Pull-Up Current SHDN = 0V, CAS = 1V
l
–6 –20 –40 µA
t
pCAS(EN)
CAS Delay from V
G(OFF)
V
OUT
= 11V
l
0.4 0.7 1.3 µs
V
EN(THR)
EN Threshold Voltage EN Rising
l
0.6 1 1.4 V
V
SHDN(THR)
SHDN Threshold Voltage SHDN Rising
l
0.4 0.8 1.2 V
V
SHDN_EN(HYS)
SHDN, EN Threshold Hysteresis 100 mV
I
SHDN_EN
SHDN, EN Pull-Up Current SHDN = EN = 0V
l
–0.5 –2 –5 µA
I
LEAK
SHDN, EN, VALID1 to VALID3, CAS Leakage
Current
SHDN = EN = (VALID1 to VALID3) = 36V,
CAS = 5.5V
l
±1 µA
OV, UV Protection Circuitry
V
OV_UV(THR)
OV1 to OV3, UV1 to UV3 Comparator Threshold V
OUT
= 11V, OV1 to OV3 Rising, UV1 to UV3
Falling
l
0.985 1 1.015 V
V
OV_UV(HYS)
OV1 to OV3, UV1 to UV3 Comparator
Hysteresis
V
OUT
= 11V
l
15 30 45 mV
I
UV_OV(LEAK)
OV1 to OV3, UV1 to UV3 Leakage Current OV1 to OV3 = 1.015V, UV1 to UV3 = 0.985V
l
±20 nA
I
OV_UV(MIN)
Minimum External Hysteresis Current I
HYS
= –400nA
l
35 50 75 nA
I
OV_UV(MAX)
Maximum External Hysteresis Current I
HYS
= –4µA
l
420 520 620 nA
V
HYS
HYS Voltage I
HYS
= –4µA
l
470 495 520 mV
t
VALID
V1 to V3 Validation Time 100 256 412 ms
