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LT1640HIS8#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LT1640L/LT1640H
1640lhfb
Negative Voltage
Hot Swap Controller
■
Allows Safe Board Insertion and Removal
from a Live – 48V Backplane
■
Operates from –10V to – 80V
■
Programmable Inrush Current
■
Programmable Electronic Circuit Breaker
■
Programmable Overvoltage Protection
■
Programmable Undervoltage Lockout
■
Power Good Control Output
The LT
®
1640L/LT1640H is an 8-pin, negative voltage Hot
Swap
TM
controller that allows a board to be safely inserted
and removed from a live backplane. Inrush current is
limited to a programmable value by controlling the gate
voltage of an external N-channel pass transistor. The pass
transistor is turned off if the input voltage is less than the
programmable undervoltage threshold or greater than the
overvoltage threshold. A programmable electronic circuit
breaker protects the system against shorts. The PWRGD
(LT1640L) or PWRGD (LT1640H) signal can be used to
directly enable a power module. The LT1640L is designed
for modules with a low enable input and the LT1640H for
modules with a high enable input.
The LT1640L/LT1640H is available in 8-pin PDIP and SO
packages.
■
Central Office Switching
■
–48V Distributed Power Systems
■
Negative Power Supply Control
Hot Swap is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Input Inrush Current
1640 F06b
V
EE
V
DD
LT1640L
SENSE
C1
†
150nF
25V
C2
†
3.3nF
100V
C3
0.1µF
100V
C4
100µF
100V
Q1
IRF530
R2
10Ω
5%
R3
†
18k
5%
1N4148
R4
†
562k
1%
R5
†
9.09k
1%
R6
†
10k
1%
R1
†
0.02Ω
5%
4
OV
GND
GND
(SHORT PIN)
3
2
–48V
OV = 71V
*
* DIODES INC. SMAT70A
†
THESE COMPONENTS ARE APPLICATION
SPECIFIC AND MUST BE SELECTED BASED
UPON OPERATING CONDITIONS AND DESIRED
PERFORMANCE. SEE APPLICATIONS
INFORMATION.
UV = 37V
UV
56
8
7
1
GATE DRAIN
PWRGD
1640 TA01
V
OUT
+
SENSE
+
TRIM
SENSE
–
V
OUT
–
V
IN
–
ON/OFF
LUCENT
JW050A1-E
V
IN
+
2
9
5V
8
7
6
5
1
4
+
C5
100µF
16V
+
43
21
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
INRUSH
CURRENT
1A/DIV
GATE – V
EE
10V/DIV
DRAIN
50V/DIV
V
EE
50V/DIV
5ms/DIV
CONTACT
BOUNCE
2
LT1640L/LT1640H
1640lhfb
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Supply Voltage (V
DD
– V
EE
) .................... –0.3V to 100V
DRAIN, PWRGD, PWRGD Pins ............... –0.3V to 100V
SENSE, GATE Pins.................................... –0.3V to 20V
UV, OV Pins .............................................. –0.3V to 60V
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range
LT1640LC/LT1640HC ............................. 0°C to 70°C
LT1640LI/LT1640HI .......................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
(Note 1), All Voltages Referred to V
EE
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC
V
DD
Supply Operating Range ● 10 80 V
I
DD
Supply Current UV = 3V, OV = V
EE
, SENSE = V
EE
● 1.3 5 mA
V
CB
Circuit Breaker Trip Voltage V
CB
= (V
SENSE
– V
EE
) ● 40 50 60 mV
I
PU
GATE Pin Pull-Up Current Gate Drive On, V
GATE
= V
EE
● –30 –45 –60 µA
I
PD
GATE Pin Pull-Down Current Any Fault Condition 24 50 70 mA
I
SENSE
SENSE Pin Current V
SENSE
= 50mV –20 µA
∆V
GATE
External Gate Drive (V
GATE
– V
EE
), 15V ≤ V
DD
≤ 80V ● 10 13.5 18 V
(V
GATE
– V
EE
), 10V ≤ V
DD
< 15V ● 6815 V
V
UVH
UV Pin High Threshold Voltage UV Low to High Transition ● 1.213 1.243 1.272 V
V
UVL
UV Pin Low Threshold Voltage UV High to Low Transition ● 1.198 1.223 1.247 V
V
UVHY
UV Pin Hysteresis 20 mV
I
INUV
UV Pin Input Current V
UV
= V
EE
● –0.02 –0.5 µA
V
OVH
OV Pin High Threshold Voltage OV Low to High Transition ● 1.198 1.223 1.247 V
V
OVL
OV Pin Low Threshold Voltage OV High to Low Transition ● 1.165 1.203 1.232 V
V
OVHY
OV Pin Hysteresis 20 mV
I
INOV
OV Pin Input Current V
OV
= V
EE
● –0.03 –0.5 µA
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2), V
DD
= 48V, V
EE
= 0V unless otherwise noted.
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART
NUMBER
S8 PART MARKING
LT1640LCN8
LT1640LCS8
LT1640LIN8
LT1640LIS8
1640L
1640LI
T
JMAX
= 125°C, θ
JA
= 120°C/W (N8)
T
JMAX
= 125°C, θ
JA
= 150°C/W (S8)
1
2
3
4
8
7
6
5
TOP VIEW
V
DD
DRAIN
GATE
SENSE
PWRGD
OV
UV
V
EE
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
ORDER PART
NUMBER
S8 PART MARKING
LT1640HCN8
LT1640HCS8
LT1640HIN8
LT1640HIS8
1640H
1640HI
T
JMAX
= 125°C, θ
JA
= 120°C/W (N8)
T
JMAX
= 125°C, θ
JA
= 150°C/W (S8)
1
2
3
4
8
7
6
5
TOP VIEW
V
DD
DRAIN
GATE
SENSE
PWRGD
OV
UV
V
EE
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
3
LT1640L/LT1640H
1640lhfb
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2), V
DD
= 48V, V
EE
= 0V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
PG
Power Good Threshold V
DRAIN
– V
EE
, High to Low Transition 1.1 1.4 2.0 V
V
PGHY
Power Good Threshold Hysteresis 0.4 V
I
DRAIN
Drain Input Bias Current V
DRAIN
= 48V ● 10 50 500 µA
V
OL
PWRGD Output Low Voltage PWRGD (LT1640L), (V
DRAIN
– V
EE
) < V
PG
I
OUT
= 1mA ● 0.48 0.8 V
I
OUT
= 5mA 1.50 3.0 V
PWRGD Output Low Voltage PWRGD (LT1640H), V
DRAIN
= 5V
(PWRGD – DRAIN) I
OUT
= 1mA ● 0.75 1.0 V
I
OH
Output Leakage PWRGD (LT1640L), V
DRAIN
=48V, ● 0.05 10 µA
V
PWRGD
= 80V
R
OUT
Power Good Output Impedance PWRGD (LT1640H), (V
DRAIN
– V
EE
) < V
PG
● 2 6.5 kΩ
(PWRGD to DRAIN)
AC
t
PHLOV
OV High to GATE Low Figures 1, 2 1.7 µs
t
PHLUV
UV Low to GATE Low Figures 1, 3 1.5 µs
t
PLHOV
OV Low to GATE High Figures 1, 2 5.5 µs
t
PLHUV
UV High to GATE High Figures 1, 3 6.5 µs
t
PHLSENSE
SENSE High to Gate Low Figures 1, 4 2 3 4 µs
t
PHLPG
DRAIN Low to PWRGD Low (LT1640L) Figures 1, 5 0.5 µs
DRAIN Low to (PWRGD – DRAIN) High (LT1640H) Figures 1, 5 0.5 µs
t
PLHPG
DRAIN High to PWRGD High (LT1640L) Figures 1, 5 0.5 µs
DRAIN High to (PWRGD – DRAIN) Low (LT1640H) Figures 1, 5 0.5 µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to V
EE
unless otherwise
specified.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
SUPPLY VOLTAGE (V)
0
SUPPLY CURRENT (mA)
1.3
1.4
1.5
60
100
1640 G01
1.2
1.1
0
20 40 80
1.6
1.7
1.8
Supply Current vs Supply Voltage
TEMPERATURE (°C)
–50 –25
1.0
SUPPLY CURRENT (mA)
1.1
1.2
1.3
1.4
1.6
0255075
1640 G02
100
1.5
Supply Current vs Temperature
SUPPLY VOLTAGE (V)
0
6
GATE VOLTAGE (V)
7
9
10
11
40
80
100
15
1640 G03
8
20 60
12
13
14
Gate Voltage vs Supply Voltage
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT1640HIS8#TRPBF

Mfr. #:
Buy LT1640HIS8#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Hot Swap Controller for -48V apps
Lifecycle:
New from this manufacturer.
Delivery:
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