LTC4350
4350fb
Typical applicaTion
FeaTures
DescripTion
Hot Swappable
Load Share Controller
The LTC
?/DIV>
4350 is a load share controller that allows sys-
tems to equally load multiple power supplies connected
in parallel. The output voltage of each supply is adjusted
using the SENSE
+
input until all currents match the share
bus. The LTC4350 also isolates supply failures by turning
off the series pass transistors and identifying the failed
supply. The failed supply can then be removed and replaced
with a new unit without turning off the system power. The
LTC4350 is available in a 16-pin narrow SSOP package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
5V Load Share (5A per Module)
applicaTions
n
Build N + 1 Redundant Supply
n
Hot Swap" Power Supplies
n
Isolates Supply Failures from Output
n
Eliminates ORing Diodes
n
Identifies and Localizes Output Low, Output High
and Open-Circuit Faults
n
Output Voltages from 1.5V to 12V
n
16-Lead Narrow SSOP Package
n
Servers and Network Equipment
n
Telecom and Base Station Equipment
n
Distributed Power Systems
GAIN COMP1
GND  COMP2
GATE
0.010
SUD50N03-07
R
+
R
R
SET
FB
I
OUT
STATUS
STATUS
SHARE BUS
SB
TIMER
V
CC
V
OUT
+
V
OUT
UV
OV
0.1礔
51
100
37.4k
12.1k
100
4.7礔
1000pF
150
0.1礔
LTC4350
0.1礔
34k
470k
12.1k
121k
43.2k
274k
0.1礔
VICOR*
VI-J30-CY
SENSE
+
OUT
+
SENSE
TRIM
OUT
GAIN COMP1
GND  COMP2
GATE
0.010
SUD50N03-07
R
+
R
R
SET
FB
I
OUT
STATUS
STATUS
SB
TIMER
V
CC
UV
OV
0.1礔
51
100
37.4k
12.1k
100
4 TA  1
4.7礔
1000pF
150
0.1礔
LTC4350
34k
*L  AD  HARIN    IR   IT W  RK  WITH M   T P  WER    PPLIE  THAT HAVE A  EN  E
+
R F  PIN
470k
0.1礔
VICOR*
VI-J30-CY
SENSE
+
OUT
+
SENSE
TRIM
OUT
0.1礔
12.1k
121k
43.2k
274k
NOT RECOMMENDED FOR NEW DESIGNS
Contact Linear Technology for Potential Replacement