LTC4253AIGN#TR Linear Technology, LTC4253AIGN#TR Datasheet - Page 23

• 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

APPLICATIO S I FOR ATIO
Live Insertion with Short Pin Control of UV/OV
In the example shown in Figure 9, power is delivered through
long connector pins whereas the UV/OV divider makes
contact through a short pin. This ensures the power con-
(–48RTN) – (–48V)
GND – V
SQTIMER
PWRGD1
PWRGD2
PWRGD3
SENSE
UV/OV
TIMER
DRAIN
EE
GATE
V
EN2
EN3
OUT
V
OR
SS
IN
U
Figure 9. Power-Up Timing with a Short Pin (All Waveforms are Referenced to V
1
V
V
U
GATEL
UVHI
V
LKO
UV CLEARS V
SENSE < V
2
W
CB
, SS < 20 • V
UVHI
INITIAL TIMING
(V
5µA
UV
50µA
FOR THE LTC4253A), CHECK OV < V
OS
20 • (V
U
20 • (V
AND TIMER < V
ACL
V
CB
TMRH
20 • V
+ V
+ V
V
TMRL
OS
OS
OS
)
)
TMRL
50µA
3 4 5 6
TIMER CLEARS V
nections are firmly established before the LTC4253/
LTC4253A are activated. At time point 1, the power pins
make contact and V
the UV/OV divider makes contact and its voltage exceeds
200µA + 8 • I
START-UP
GATE
7
50µA
OVHI
89
V
5µA
DRN
A B
SQTMRH
(V
TMRL
OV
V
V
V
V
V
V
, CHECK GATE < V
IN
ACL
CB
DRNCL
DRNL
FOR THE LTC4253A), RESET < 0.8V, GATE < V
SQTMRL
– V
C
LTC4253/LTC4253A
GATEH
5µA
5µA
IN
ramps through V
D
V
V
GATEL
SQTMRH
SQTMRL
, SENSE < V
EE
5µA
)
4253 F09
CB
LKO
AND SS < 20 • V
. At time point 2,
GATEL
,
OS
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