LTC4217 Linear Technology, LTC4217 Datasheet - Page 4

• Manufacturer Part Number: LTC4217
• Description: 2A Integrated Hot Swap Controller
• Manufacturer: Linear Technology

www.DataSheet4U.com
ELECTRICAL CHARACTERISTICS
LTC4217
temperature range, otherwise specifi cations are at T
SYMBOL
Inputs
I
R
V
ΔV
ΔV
V
ΔV
R
Outputs
V
I
V
V
I
I
I
A
I
I
I
I
AC Characteristics
t
t
t
t
t
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 specifi ed.
Note 3: An internal clamp limits the GATE pin to a maximum of 6.5V
above OUT. Driving this pin to voltages beyond the clamp may damage the
device.
Note 4: This IC 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 specifi ed maximum operating junction
temperature may impair device reliability.
4
IN
OH
TIMER(UP)
TIMER(DN)
TIMER(RATIO)
OFF(IMON)
GATE(UP)
GATE(DN)
GATE(FST)
PHL(GATE)
PHL(ILIM)
D(ON)
D(CB)
D(AUTO-RETRY)
TH
TIMER(H)
TIMER(L)
UV(RTH)
OL
IMON
IN
ISET
OV(HYST)
UV(HYST)
FB(HYST)
PARAMETER
OV, UV, FB Pin Input Current
OV, UV, FB Pin Input Resistance
OV, UV, FB Pin Threshold Voltage
OV Pin Hysteresis
UV Pin Hysteresis
UV Pin Reset Threshold Voltage
FB Pin Power Good Hysteresis
I
PG, FLT Pin Output Low Voltage
PG, FLT Pin Input Leakage Current
TIMER Pin High Threshold
TIMER Pin Low Threshold
TIMER Pin Pull-Up Current
TIMER Pin Pull-Down Current
TIMER Pin Current Ratio I
I
I
Gate Pull-Up Current
Gate Pull-Down Current
Gate Fast Pull-Down Current
Input High (OV), Input Low (UV) to Gate Low
Propagation Delay
Short Circuit to Gate Low
Turn-On Delay
Circuit Breaker Filter Delay Time (Internal)
Auto-Retry Turn-On Delay (Internal)
SET
MON
MON
Pin Output Resistor
Pin Current Gain
Pin Offset Current
TIMER(DN)
/I
TIMER(UP)
A
= 25°C. V
CONDITIONS
V
LTC4217-12 Only
V
V
I
V
V
V
V
V
I
I
Gate Drive On, V
Gate Drive Off, V
Fast Turn Off, V
V
V
Step V
V
The
V
OUT
OUT
OUT
IN
IN
UV
OUT
TIMER
TIMER
TIMER
TIMER
FB
GATE
FB
GATE
= 1.2V, LTC4217 Only
Rising
= 0, Step I
= 0V, Step I
Falling
= 2mA
= 2A
= 132mA
l
= 30V
DD
< 16.5V Falling
UV
< 16.5V Falling
Rising
Falling
= 0V
= 1.2V
denotes the specifi cations which apply over the full operating
= 12V unless otherwise noted.
to 2V, V
Note 5: T
dissipation, P
Note 6: Switch on-resistance is guaranteed by design and test correlation
on the DHC package.
SENSE
SENSE
GATE
GATE
GATE
LTC4217DHC, LTC4217DHC-12: T
LTC4217FE: T
GATE
= 18V, V
to 1.2A,
= V
= 18V, V
to 1.2A
> 13V
J
is calculated from the ambient temperature, T
SOURCE
D
, according to the formula:
OUT
OUT
J
= T
= 12V
= 12V
= 12V
A
+ (P
D
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
• 38°C/W)
1.21
0.55
19.5
47.5
MIN
–80
–19
190
1.2
0.1
1.4
1.6
1.5
J
13
10
50
10
50
50
= T
A
+ (P
1.235
1.235
–100
0.62
0.21
TYP
–24
250
140
100
100
D
0.4
18
20
80
20
20
50
0
0
2
2
0
8
1
2
• 43°C/W)
A
, and power
–120
MAX
1.26
20.5
1.28
52.5
±7.5
110
±10
–29
340
150
150
0.7
0.8
0.3
2.6
2.7
2.7
±1
23
30
30
10
5
UNITS
4217fb
μA/A
mV
mV
mV
mA
ms
ms
ms
kΩ
kΩ
μA
μA
μA
μA
μA
μA
μA
μs
μs
%
V
V
V
V
V