LT4356MPMS-1#TR Linear Technology, LT4356MPMS-1#TR Datasheet - Page 15

• Manufacturer Part Number: LT4356MPMS-1#TR
• Description: MS-Hot Swap/High Voltage, Overvoltage Protection Regulator
• Manufacturer: Linear Technology

Specifications of LT4356MPMS-1#TR

• Linear Misc Type: Positive Voltage
• Package Type: MSOP
• Operating Supply Voltage (min): 4V
• Operating Supply Voltage (max): 80V
• Operating Temperature (max): 125C
• Product Depth (mm): 3mm
• Product Height (mm): 0.86mm
• Product Length (mm): 3mm
• Mounting: Surface Mount
• Pin Count: 10
• Lead Free Status / Rohs Status: Not Compliant

SMAJ58CA
APPLICATIONS INFORMATION
SMAJ58CA
12V
V
Figure 8. Overvoltage Regulator with P-channel MOSFET
Reverse Input Protection
12V
D2*
Figure 7. Overvoltage Regulator with N-channel MOSFET
Reverse Input Protection
V
D2*
IN
IN
*DIODES INC.
*DIODES INC.
10mΩ
10mΩ
11
12
11
12
R
R
6
7
6
7
SNS
SNS
V
SHDN
A
IN
V
SHDN
A
IN
SNS
SNS
CC
OUT
CC
OUT
+
+
5
5
1N4148
D1
Si4435
Q2
GND
2N3904
R6
10k
10
GND
Q3
1N5245
IRLR2908
10
R7
10k
LT4356S
LT4356S
15V
Q2
D1
TMR
R4
10Ω
1
TMR
C
0.1μF
1
TMR
IRLR2908
1M
R5
C
0.1μF
GATE
IRLR2908
TMR
Q1
GATE
4
Q1
R3
10Ω
4
R3
10Ω
OUT
4356 F08
FLT
OUT
EN
FB
4356 F07
3
FLT
EN
FB
3
2
8
9
2
8
9
R1
59k
R2
4.99k
R1
59k
R2
4.99k
V
12V, 3A
CLAMPED
AT 16V
V
12V, 3A
CLAMPED
AT 16V
OUT
OUT
Shutdown
The LT4356 can be shut down to a low current mode when
the voltage at the SHDN pin goes below the shutdown
threshold of 0.6V. The quiescent current drops to 7μA for
the LT4356-1 and 60μA for the LT4356-2 which leaves the
auxiliary amplifi er on.
The SHDN pin can be pulled up to V
up to 60V without damaging the pin. Leaving the pin open
allows an internal current source to pull it up and turn
on the part while clamping the pin to 2.5V. The leakage
current at the pin should be limited to no more than 1μA
if no pull-up device is used to help turn it on.
Supply Transient Protection
The LT4356 is guaranteed to be safe from damage with
supply voltages up to 100V. Nevertheless, voltage tran-
sients above 100V may cause permanent damage. During
a short-circuit condition, the large change in current fl owing
through power supply traces and associated wiring can
cause inductive voltage transients which could exceed
100V. To minimize the voltage transients, the power trace
parasitic inductance should be minimized by using wide
traces. A small surge suppressor, D2, in Figure 9, at the
input will clamp the voltage spikes.
UNDERVOLTAGE
Figure 9. Overvoltage Regulator with Low-Battery Detection
383k
100k
R4
R5
V
LT4356MP-1/LT4356MP-2
IN
SMAJ58A
D2
12
11
6
7
V
SHDN
IN
A
CC
OUT
+
10mΩ
R
SNS
GND
SNS
LT4356S
10
5
IRLR2908
GATE
Q1
TMR
4
R3
10Ω
1
C
47nF
TMR
OUT
4356 F09
FLT
3
EN
FB
CC
2
9
8
or below GND by
R1
59k
R2
4.99k
FAULT
*SANYO 25CE22GA
SHDN
CONVERTER
C
22μF
L
*
DC-DC
15
4356mp12fa
V
CC
GND