LSN2-T30-D12 Datasheet, PDF (1/17 Pages) Murata Manufacturing Co., Ltd. – DOSA-SIP, 30A POL DC/DC Converters

www.murata-ps.com
LSN2-T/30-D12 Series
DOSA-SIP, 30A POL DC/DC Converters
Typical unit
FEATURES
■ _{Standard (DOSA compatible) SIP package}
■ _{User-selectable outputs: 0.8 to 5Vdc}
■ _{30 Amps maximum output current}
■ _{Double lead free to RoHS 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 efficiency up to 94%}
■ _{Fast settling, high di/dt IOUT slew rate}
■ _{Designed to meet UL 60950-1, CAN/CSA-}
C22.2 60950-1, IEC 60950-1, EN60950-1
safety approvals
■ _{Extensive self-protection with short circuit}
“hiccup” shutdown
■ _{Output overvoltage/overcurrent protection}
■ _{Input under and overvoltage shutdown}
DESCRIPTION
These miniature point-of-load (POL) switching
DC/DCs are an ideal regulation and supply
element for distributed power and interme-
diate bus architectures. The converter is
fully compatible with the Distributed-power
Open Standards Alliance specification
(www.dosapower.com). LSN2-T/30-D12 can
power CPU’s, programmable logic and mixed
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
48V/12V bus converter 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 sinking and no external
components needed. The converter features
quick transient response (to 25μsec) and
very fast current slew rates (to 20A/μsec).
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 fixed-frequency buck topology
delivering high efficiency, tight line/load
regulation, stable no-load operation and no
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.
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.
+INPUT
COMMON
ON/OFF
CONTROL
➀
VCC
PWM
CONTROLLER
CURRENT
SENSE
VTRACK/SEQUENCE
INPUT
Typical topology is shown.
Ḥ
For full details go to
www.murata-ps.com/rohs
REFERENCE &
ERROR AMP
Figure 1. LSN2 -T/30-D12 Series Simplified Schematic
10.57
+OUTPUT
+SENSE
COMMON
POWER
GOOD
OUTPUT
VOUT
TRIM
➀ Only one phase of two is shown.
www.murata-ps.com
Technical enquiries email: [e-mail], tel: [phone]
MDC_LSN2-T/30-D12 Series.B17 Page 1 of 17