LTC4230_15 Datasheet, PDF (3/36 Pages) Linear Technology – Triple Hot Swap Controller with Multifunction Current Control

LTC4230
ELECTRICAL CHARACTERISTICS _{The q denotes specifications which apply over the full operating}
temperature range, otherwise specifications are T_A = 25°C. V_CC1 = 3.3V, V_CC2 = 2.5V,V_CC3 = 1.8V unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
∆V_GATEn
External N-Channel Gate Drive
V_{GATE1, 2} – V_{CC1, 2} (for V_{CC1, 2} = 2.7V, V_CC3 = V_CC1 – 1V) q 4.5
V_GATE3 – V_CC3 (for V_{CC1, 2} = 2.7V, V_CC3 = V_CC1 – 1V)
q 5.5
V_{GATE1, 2} – V_{CC1, 2} (for V_{CC1, 2} = 3.3V, V_CC3 = V_CC1 – 1V) q 5
V_GATE3 – V_CC3 (for V_{CC1, 2} = 3.3V, V_CC3 = V_CC1 – 1V)
q6
V_GATEn – V_CCn (for V_{CC1, 2} = 5V, V_CC3 = V_CC1 – 1V)
q9
V_GATEn – V_CCn (for V_{CC1, 2} = 12V or 15V,
q7
V_CC3 = V_CC1 – 1V)
8
V
9
V
10
V
11
V
16
V
18
V
V_{GATEn, 0V}
GATEn Overvoltage Lockout
Threshold
0.25
V
V_FBn
∆V_FBn
V_{FBn, HST}
V_ONHI
V_ONLO
V_ONHST
I_FILTER
FBn Low Threshold Voltage
FBn Line Regulation
FBn Hysteresis
ON High Threshold Voltage
ON Low Threshold Voltage
ON Hysteresis
FILTER Pull-Up Current
FILTER Pull-Down Current
FBn High to Low Transition
2.7V ≤ V_CC1 ≤ 16.5V
ON Low to High Transition
ON High to Low Transition
During Slow Fault Condition
During Normal and Reset Conditions
q 1.209 1.234 1.259
V
0.5
mV
3
mV
q 1.250 1.314 1.380
V
q 1.172 1.234 1.270
V
80
mV
q – 2.5
–2
– 1.3
µA
q7
10
13
µA
V_FILTER
V_FILTERHST
I_TMR
FILTER Threshold
FILTER Threshold Hysteresis
TIMER Pull-Up Current
TIMER Pull-Down Current
V_TMR
TIMER Threshold
Latched Off Threshold, FILTER Low to High
TIMER On
TIMER Off, V_FAULT = Low
V_TIMER = 1.5V
TIMER Low to High
TIMER High to Low
q 1.10 1.26 1.42
V
–70
mV
q – 23 – 20 –17
µA
q 0.9
1.6
2.3
µA
2.5
mA
q 1.172 1.234 1.27
V
q
0.3
0.5
V
V_FAULT
V_{FAULT, HST}
I_{FAULT, UP}
V_OLFAULT
V_OLRESETn
t_GATEFC
FAULT Low Threshold Voltage
FAULT Hysteresis
FAULT Pull-Up Current
Output Low Voltage
Output Low Voltage
Fast COMPn Trip to
GATEn Discharging
FAULT High to Low
FAULT Low to High
I_FAULT = 1.6mA, V_CC1 = 5V
I_RESETn = 1.6mA, V_CC1 = 5V
V_CB = 0mV to 200mV Step
q 1.172 1.234 1.27
V
50
mV
q – 2.5
–2
– 1.5
µA
q
0.19
0.4
V
q
0.19
0.4
V
q
0.5
1
µs
t_FAULTSC
Slow Comparator Trip to
V_CB = 0mV to 100mV Step, FILTER Floating
10
µs
FILTER High and FAULT Latched 10nF at FILTER Pin to GND
q
7
12
ms
t_OVPFTR
FILTER Comparator Trip to
GATEn Discharging
V_FILTER = 0V to 5V
q
8
12
µs
t_EXTFAULT
t_RESET
t_OFF
FAULT Low to GATE Discharging
Circuit Breaker Reset Time
Turn-Off Time
V_FAULT = 5V to 0V
ON Held Low to Guarantee FAULT High
ON Goes Low to GATEn Off
q 1.5
3
4.5
µs
q
15
30
µs
8
µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All current into device pins is positive; all current out of device
pins is negative; all voltages are referenced to ground unless otherwise
specified.
Note 3: An internal zener at the GATEn pin clamps the charge pump
voltage to a typical maximum operating voltage of 26V. External overdrive
of the GATEn pin beyond the internal zener voltage may damage the part.
The GATEn capacitance must be < 0.15µF at maximum V_CC. If a lower
GATEn pin voltage is desired, use an external zener diode.
4230f
3