LSM16A-W3 Datasheet, PDF (3/12 Pages) Murata Manufacturing Co., Ltd. – Non-Isolated, Wide Input SMT DC/DC Converters

LSM-16A W3 Models
Non-Isolated, Wide Input SMT DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage, 200 lfm air flow, and full-load conditions
unless noted. ~
Input Voltage Range
Input
3-5.5 Volts (5V nominal) …
Input Current:
Normal Operating Conditions
Inrush Transient
Standby/Off Mode
Output Short-Circuit Condition 
See Ordering Guide
0.02A² sec
8mA
60-110mA average (model dependent)
Input Reflected Ripple Current ƒ 10-70mAp-p, model dependent
Input Filter Type
Capacitive
Overvoltage Protection
None
Reverse-Polarity Protection
None
Undervoltage Shutdown
None
On/Off Control €
On = open to +VIN (internal pull-up to +VIN)
Off = 0 to +0.4V (1mA)
VOUT Accuracy (50% load)
Output
±1.5%
Temperature Coefficient
±0.02%/°C
Minimum Loading ~
No load
Maximum Capacitive Load
5000μF (electrolytic),
2000μF (0.02Ω ESR, OSCON)
VOUT Trim Range
±10% „
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
19-30 Amps (model dependent)
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) 30-70μsec to ±2% of final value
(model dependent)
Start-Up Time: 
VIN to VOUT and On/Off to VOUT
7msec
Switching Frequency
300 ±50kHz
Environmental
Calculated MTBF ‚
TBD
Operating Temperature: (Ambient)  –40 to +85°C (with derating)
See Derating Curves
Maximum PC Board Temperature +100°C
Thermal Shutdown
+115°C (110 to 125°C)
EMI
Conducted or radiated,
FCC Part 15, EN55022
Class B
Safety
Designed to meet UL/IEC/EN60950-1,
CSA-C22.2 No. 234
Dimensions
Pin Dimensions/Material
Weight
Physical
1.3" x 0.53" x 0.34" (33.03 x 13.46 x 8.64)
0.112" x 0.062" (2.84 x 1.57mm) rectangular
copper with gold plate over nickel underplate
0.28 ounces (7.8g)
Flamability Rating
UL94V-0
~ All models are tested/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 application 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.
ƒ Input Ripple Current is tested/specified over a 5-20MHz bandwidth with an external 2 x 100μF input
capacitor and a simulated source impedance of 1000μF and 1μH. See I/O Filtering, Input Ripple
Current, and Output Noise for details.
„ LSM-0.75/16-W3 can not be trimmed down.
… Input voltage must be 4.5V minimum for 3.3V output.
Absolute Maximum Ratings
Input Voltage:
Continuous or transient
On/Off Control (Pin 1)
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature
6 Volts (0.75, 1, 1.2, 1.5, 1.8, 2, 2.5 VOUT)
7 Volts (3.3VOUT and "T" models)
+VIN
None
None
Current limited. Devices can
withstand sustained output short
circuits without damage.
–40 to +125°C
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 W3 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’s are designed with high-quality,
high-performance internal I/O caps, and will operate within spec in most appli-
cations with no additional external components.
In particular, the LSM’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.
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 appropri-
ate 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 inductive source imped-
ances can greatly affect system stability. Your specific system configuration
may necessitate additional considerations.
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Technical enquiries email: [e-mail], tel: [phone]
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