Datasheet

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.