LSM16A-D12 Datasheet, PDF (3/12 Pages) Murata Manufacturing Co., Ltd. – Non-Isolated, 13-80W SMT DC/DC Converters

Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted. ➀
Input
Input Voltage Range
10-14 Volts (12V nominal)
Startup Voltage
8.5-9.2 Volts (model dependent)
Input Current:
Normal Operating Conditions
Inrush Transient
Standby/Off Mode
Output Short-Circuit Condition ➁
Input Reflected Ripple Current ➁ ➅
See Ordering Guide
0.08A² sec
1.5mA
12-40mA average (model dependent)
20-50mAp-p, model dependent
Input Filter Type
Capacitive
Overvoltage Protection
None
Reverse-Polarity Protection
None
Undervoltage Shutdown
On/Off Control ➁ ➂
7.5-8 Volts (model dependent)
On = open lead
Off = -0.3V to +0.2V (3µA max.)
Output
VOUT Accuracy (50% load)
Minimum Loading ➀
±1.25%
No load
Maximum Capacitive Load
1000µF (low ESR, OSCON)
VOUT Trim Range
Ripple/Noise (20MHz BW) ➀ ➁ ➃
±10%
See Ordering Guide
Total Accuracy
3% over line/load/temperature
Efficiency
See Ordering Guide
Overcurrent Detection and Short-Circuit Protection: ➁
Current-Limiting Detection Point
21-33 Amps (model dependent)
Short-Circuit Detection Point
98% of VOUT set
SC Protection Technique
Hiccup with auto recovery
Short-Circuit Current
125-420mA average (model dependent)
Dynamic Characteristics
Transient Response (50% load step)
Start-Up Time: ➁
VIN to VOUT and On/Off to VOUT
30-135µsec to ±2% of final value
(model dependent)
60msec for VOUT = 1V and 0.75V
40msec for VOUT = 1.2V to 5V
Switching Frequency
260kHz ±10%
Environmental
Calculated MTBF ➄
LSM-1.2/16-D12
LSM-1.5/16-D12
LSM-1.8/16-D12
LSM-2.5/16-D12
LSM-3.3/16-D12
LSM-5/16-D12
Operating Temperature: (Ambient) ➁
9,160,138 hours
8,674,318 hours
8,334,117 hours
8,534,580 hours
7,817,255 hours
7,756,061 hours
–40 to +85°C (with Derating)
See Derating Curves
Thermal Shutdown
+115°C (110 to 125°C)
Dimensions
Lead Dimensions/Material
Weight
Flamability Rating
Safety
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 alloy with gold plate over nickel
underplate
0.28 ounces (7.8g)
UL94V-0
Designed to meetUL/cUL/IEC/EN 60950-1,
CSA-C22.2 No. 234
LSM-16A D12 Models
Non-Isolated, 13-80W SMT DC/DC Converters
➀ 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.
➁ See Technical Notes and Performance Curves for details.
➂ The On/Off Control (pin 1) is designed to be driven with open-collector logic (referenced to Common,
pin 3) or a switch to ground.
➃ Output noise may be further reduced with the installation of additional external output filtering. See
I/O Filtering and Noise Reduction.
➄ MTBF’s are calculated using Telcordia SR-332(Bellcore), ground fixed, Ta = +25°C, full power,
natural convection, +67°C pcb temperature.
➅ Input Ripple Current is tested/specified over a 5Hz-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.
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
15 Volts
+6V
None
None
Current limited. Devices can
withstand sustained output short
circuits without damage.
–55 to +125°C
See Reflow Solder Profile
These are stress ratings. Exposure of devices to greater than 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 D12 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 D12'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 D12s 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 appropri-
ate frequencies), low ESR, and high rms-ripple-current ratings. The switching
nature of modern DC/DCs 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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