LSM10A-D3 Datasheet, PDF (3/13 Pages) Murata Manufacturing Co., Ltd. – Single Output, Non-Isolated, 3.3VIN, 0.8-2.5VOUT 10 Amp DC/DC’s in SMT Packages

LSM-10A D3 Models
Single Output, Non-Isolated, 3.3VIN, 0.8-2.5VOUT
10 Amp DC/DC’s in SMT Packages
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted. ~
Input Voltage Range
Input Current:
Normal Operating Conditions
Inrush Transient
Standby/Off Mode
Output Short-Circuit Condition 
Input Reflected Ripple Current 
Input Filter Type
Overvoltage Protection
Reverse-Polarity Protection
Undervoltage Shutdown
On/Off Control €
Input
4.5 to 5.5 Volts (5V nominal)
See Ordering Guide
0.01A²sec
8mA
110mA average
10mAp-p
Capacitive (44μF)
None
None
None
On = open (internal pull-up to +VIN)
Off = 0 to +0.8V (1ma max.)
Output
VOUT Accuracy (50% load)
±1% maximum
Minimum Loading ~
No load
Maximum Capacitive Load
1000μF (low ESR, OSCON)
VOUT Trim Range 
±10% (0.8V not trimmable)
Ripple/Noise (20MHz BW) ~ See Ordering Guide
Total Accuracy
3% over line/load temperature
Efficiency 
See Ordering Guide
Overcurrent Detection and Short-Circuit Protection: 
Current-Limiting Detection Point
17 (13-23.5) Amps
Short-Circuit Detection Point
98% of VOUT set
SC Protection Technique
Hiccup with auto recovery
Short-Circuit Current
600mA average
Dynamic Characteristics
Transient Response (50% load step) 100μsec to ±2% of final value
Start-Up Time: 
VIN to VOUT
On/Off to VOUT
7msec
6msec
Switching Frequency:
300kHz (+40/–50kHz)
Environmental
Calculated MTBF ‚
2.3 -1.8 million hours (1VOUT to 5VOUT)
Operating Temperature: (Ambient) 
Without Derating (Natural convection) –40 to +65/71°C (model dependent)
With Derating
See Derating Curves
Thermal Shutdown
+115°C (110 to 125°C)
Dimensions
Pin Dimensions/Material
Weight
Flammability Rating
Safety
Physical
1.3" x 0.53" x 0.34" (33.02 x 13.46 x 8.64 mm)
0.112" x 0.062" (2.84 x 1.57mm) rectangular
copper with gold plate over nickel underplate
0.28 ounces (7.8g)
UL94V-0
UL/cUL/IEC/EN 60950,
CSA-C22.2 No. 60950
~ All models are tested and specified with external 22μF tantalum input and output capacitors.
These capacitors are necessary to accommodate our test equipment and may not be
required to achieve specified performance in your applications. All models are stable and
regulate within spec under no-load conditions.
 See Technical Notes and Performance Curves for details.
€ The On/Off Control (pin 1) is designed to be driven with open-collector logic or the appli-
cation of appropriate voltages (referenced to Common, pin 3). Applying a voltage to On/Off
Control when no input voltage is applied to the converter may cause permanent damage.
 Output noise may be further reduced with the installation of additional external output
filtering. See I/O Filtering and Noise Reduction.
‚ MTBF’s are calculated using Telcordia SR-332(Bellcore), ground fixed, TA = +25°C, full
power, natural convection, +67°C pcb temperature.
Absolute Maximum Ratings
Input Voltage:
Continuous or transient
6 Volts
On/Off Control (Pin 1)
+VIN
Input Reverse-Polarity Protection
None
Output Overvoltage Protection
None
Output Current
short
without damage.
Current limited. Devices can
withstand sustained output
circuits
Storage Temperature
–40 to +125°C
Lead Temperature (soldering, 10 sec.) See Reflow Solder Profile
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specifications Table is not implied.
TECHNICAL NOTES
I/O Filtering and Noise Reduction
All models in the LSM D3 Series are tested and specified with external
22μF tantalum input and output capacitors. These capacitors are necessary
to accommodate our test equipment and may not be required to achieve
desired performance in your application. The LSM D3's are designed with
high-quality, high-performance internal I/O caps, and will operate within spec
in most applications with no additional external components.
In particular, the LSM D3's input capacitors are specified for low ESR
and are fully rated to handle the units' input ripple currents. Similarly, the
internal output capacitors are specified for low ESR and full-range frequency
response. As shown in the Performance Curves, removal of the external
22μF tantalum output caps has minimal effect on output noise.
In critical applications, input/output ripple/noise may be further reduced using
filtering techniques, the simplest being the installation of external I/O caps.
External input capacitors serve primarily as energy-storage devices. They
minimize high-frequency variations in input voltage (usually caused by IR
drops in conductors leading to the DC/DC) as the switching converter draws
pulses of current. Input capacitors should be selected for bulk capacitance
(at appropriate frequencies), low ESR, and high rms-ripple-current ratings.
The switching nature of modern DC/DC's requires that the dc input voltage
source have low ac impedance at the frequencies of interest. Highly induc-
tive source impedances can greatly affect system stability. Your specific
system configuration may necessitate additional considerations.
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Figure 2. Measuring Input Ripple Current
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MDC_LSM-10A D3.B01 Page 3 of 13