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DESCRIPTION
LSN2-T/30-D12 Series
DOSA-SIP, 30A POL DC/DC Converters
OBSOLETE PRODUCT
Click Here For Obsolescence Notice of February 2014.
These miniature point-of-load(POL)switching
DC/DCs are an ideal regulation and supply ele-
ment for mixed voltage systems. The converter
Typical unit
Last time buy: August 31, 2014. is fully compatible with the Distributed-power
Open?Standards Alliance speci?cation
(www.dosapower.com). LSN2-T/30-D12 can
power CPU’s, programmable logic and mixed
LSN2-T/30-D12 is an open-frame SIP
using advanced surface mount (SMT)
assembly and test techniques. The extraor-
dinary performance is achieved with a fully
synchronous ?xed-frequency buck topology
delivering high ef?ciency, tight line/load
regulation, stable no-load operation and no
Standard (DOSA compatible) SIP package
User-selectable outputs: 0.8 to 5Vdc
30 Amps maximum output current
FEATURES
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voltage systems with little heat and low noise.
A typical application uses a master isolated
12V DC supply and the LSN2-T/30-D12 con-
verter for local 1.8V and 3.3V DC supplies.
All system isolation resides in the central
output reverse conduction.
Output voltage, selected with an
external programming resistor or DC volt-
age into the trim pin, means OEM’s can
stock one model for multiple applications.
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Meets RoHS-6 standards
Selectable phased start-up sequencing,
tracking and pre-bias operation
Wide range input voltages 6 to 14Vdc
To 150W with overtemperature shutdown
Very high ef?ciency up to 94%
Fast settling, high di/dt I OUT slew rate
Meets UL 60950-1, CAN/CSA-C22.2 60950-
1, IEC 60950-1, EN60950-1 safety approvals,
2nd edition
supply, leaving lower cost POL regulation
right at the load. Unlike linear regulators, the
LSN2-T/30-D12 can deliver very high power
(up to 150W) in a tiny area with no heat sink-
ing and no external components needed. The
converter features quick transient response
(to 25μsec) and very fast current slew rates
(to 20A/μsec).
Contents
Also included are protection for out-of-
limit voltages, currents and temperature.
Other functions: a remote On/Off control,
optional Power Good output, a phased
start-up sequence and tracking system,
and a load Sense input.
Page
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Extensive self-protection with short circuit
“hiccup” shutdown
Output overvoltage/overcurrent protection
Input under and overvoltage shutdown
Description, Photograph, Connection Diagram
Ordering Guide, Model Numbering, Soldering Guidelines
Mechanical Specs, Input/Output Pinout
Detailed Electrical Speci?cations
1
2
3
4
+INPUT
Technical Notes
Performance Data
5
13
+OUTPUT
10.5
+SENSE
?
COMMON
COMMON
ON/OFF
V CC
PWM
CONTROLLER
CURRENT
SENSE
CONTROL
POWER
GOOD
OUTPUT
V TRACK /SEQUENCE
INPUT
REFERENCE &
ERROR AMP
V OUT
Typical topology is shown.
Figure 1. LSN2 -T/30-D12 Series Simpli?ed Schematic
? Only one phase of two is shown.
TRIM
　
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_LSN2-T/30-D12 Series.C01 Δ Page 1 of 16
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