LTC4253AIGN#TR Linear Technology, LTC4253AIGN#TR Datasheet - Page 31

• Manufacturer Part Number: LTC4253AIGN#TR
• Description: MS-Hot Swap/High Voltage, Neg. 48V Hot Swap With 1% UV, Sequencer
• Manufacturer: Linear Technology

Specifications of LTC4253AIGN#TR

• Family Name: LTC4253A
• Package Type: SSOP N
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 3.99mm
• Product Height (mm): 1.5mm
• Mounting: Surface Mount
• Pin Count: 16
• Lead Free Status / Rohs Status: Not Compliant

PACKAGE DESCRIPTIO
APPLICATIO S I FOR ATIO
The peak power at the fault current limit occurs at the
supply overvoltage threshold. The fault current limited
power is:
POWER FAULT
(
V
SUPPLY
R
S
(
)
(0.178 – 0.249)
.007 – .0098
•
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
⎡
⎢
⎣
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
V
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
ACL
)
U
.0165 ± .0015
.254 MIN
=
RECOMMENDED SOLDER PAD LAYOUT
−
(
V
U
SUPPLY
(0.406 – 1.270)
.016 – .050
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
(MILLIMETERS)
INCHES
−
W
V
U
Z
) •
16-Lead Plastic SSOP (Narrow .150 Inch)
.045 ±.005
.150 – .165
0° – 8° TYP
R
R
(0.38 ± 0.10)
4
3
.015 ± .004
.0250 BSC
(Reference LTC DWG # 05-08-1641)
⎤
⎥
⎦
U
× 45°
(18)
GN Package
(5.817 – 6.198)
(0.203 – 0.305)
Circuit Breaker with Foldback Current Limit
Figure 17 shows the LTC4253A in a foldback current limit
application. When V
supply, current flows through resistors R3 and R4. This
results in a voltage drop across R4 and a corresponding
reduction in voltage drop across the sense resistor, R
the ACL amplifier servos the sense voltage between the
SENSE and V
current through R
during an output short-circuit condition. Without foldback
current limiting resistor R4, the current is limited to 3A
during analog current limit. With R4, the short-circuit
current is limited to 0.5A when V
.008 – .012
.229 – .244
TYP
.0532 – .0688
(1.35 – 1.75)
16 15 14 13
1
EE
2 3
(4.801 – 4.978)
LTC4253/LTC4253A
pins to about 60mV. The short-circuit
S
.189 – .196*
reduces as the V
4
OUT
12 11 10 9
5 6 7
(0.635)
is shorted to the – 48V RTN
.0250
BSC
(0.102 – 0.249)
8
.004 – .0098
OUT
(3.810 – 3.988)
.150 – .157**
GN16 (SSOP) 0204
OUT
(0.229)
.009
REF
is shorted to 71V.
voltage increases
31
425353afc
S
, as