LTC1921 Linear Technology, LTC1921 Datasheet - Page 2

• Manufacturer Part Number: LTC1921
• Description: Dual .48V Supply and Fuse Monitor
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
ELECTRICAL CHARACTERISTICS
LTC1921
(Note 1) All voltages referred to RTN
Supply Voltage
(V
Transient Voltage (V
(Note 2) ........................................................ 0V to 200V
Transient Voltage (V
(Note 2) ...................................................... 0V to –200V
OUT A, OUT B, OUT F Pins ......................... 0.3V to – 8V
Maximum Junction Temperature ......................... 150 C
Operating Temperature Range
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
temperature range, otherwise specifications are at T
FUSE B = –48V, unless otherwise noted.
PARAMETER
Power Supply
Supply Voltage Range (RTN – V
Supply Current (I
Supply Monitor
Undervoltage Threshold
Undervoltage Recovery Threshold
Overvoltage Threshold
Overvoltage Threshold Hysteresis
Fuse Monitor
Input Resistance, FUSE A, FUSE B
Fuse Comparison Threshold |V
Output
Propagation Delay
Output Switch Resistance, OUT F, OUT A, OUT B
Output Switch Off Leakage
Output Switch Resistance in Undervoltage Lockout,
OUT F, OUT A, OUT B
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Transient voltage for less than 10 s. This parameter is not 100%
tested. Voltage should not exceed 200V between any two pins.
2
A
LTC1921CMS8 ........................................ 0 C to 70 C
LTC1921IMS8 .................................... – 40 C to 85 C
, V
B
, FUSE A, FUSE B) ....................... 100V to –100V
A
+ I
B
)
W
A
A
, V
, V
FUSEA
A
B
B
, RTN – V
, FUSE A, FUSE B)
, FUSE A, FUSE B)
W W
– V
A
|, |V
B
)
FUSEB
– V
B
|
U
A
CONDITIONS
LTC1921C
LTC1921I
C
V
I
V
V
V
OUT
OUT
A
A
A
A
= 25 C. (Note 3) RTN = 0V, V
= V
= V
= –10V, V
= 0V, V
= 10mA
= 100pF, Overdrive = 1V
B
B
The
= –35V, V
= –10V, I
B
= –10V, I
B
denotes specifications which apply over the full operating
= 0V, I
OUT
FUSEA
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Note 3: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to RTN unless otherwise
specified.
OUT
= 10mA
OUT
= V
FUSE A
OUT F
= 10mA
= 10mA
RTN
FUSEB
T
V
JMAX
A
8-LEAD PLASTIC MSOP
1
2
3
4
= 150 C,
= 0V
MS8 PACKAGE
A
TOP VIEW
= –48V, V
JA
= 250 C/W
8
7
6
5
B
V
FUSE B
OUT B
OUT A
= –48V, FUSE A = –48V,
B
–39.5
–43.5
–71.5
MIN
0.9
0.5
10
1
U
MS8 PART MARKING
–160
TYP
220
500
LTC1921CMS8
LTC1921IMS8
2.5
11
25
ORDER PART
NUMBER
W
LTZV
LTZU
–37.5
–42.5
–68.5
–250
–300
MAX
1.6
4.5
4.5
80
50
60
80
80
UNITS
U
1921i
M
pA
V
A
A
V
V
V
V
V
V
V
s