lsm-1.8/16-w3 C&D Technologies., lsm-1.8/16-w3 Datasheet - Page 3

• Manufacturer Part Number: lsm-1.8/16-w3
• Description: Non-isolated, Wide Input Smt Dc/dc Converters
• Manufacturer: C&D Technologies.

Performance/Functional Specifications
Typical @ T
unless noted.
Input Voltage Range
Input Current:
Input Reflected Ripple Current ➁ ➅ 10-70mAp-p, model dependent
Input Filter Type
Overvoltage Protection
Reverse-Polarity Protection
Undervoltage Shutdown
On/Off Control ➁ ➂
V
Temperature Coefficient
Minimum Loading ➀
Maximum Capacitive Load
V
Ripple/Noise (20MHz BW) ➀ ➁ ➃
Total Accuracy
Efficiency
Overcurrent Detection and Short-Circuit Protection: ➁
Transient Response (50% load step)
Start-Up Time: ➁
Switching Frequency
Calculated MTBF ➄
Operating Temperature: (Ambient) ➁
Maximum PC Board Temperature
Thermal Shutdown
EMI
Safety
Dimensions
Pin Dimensions/Material
Weight
Flamability Rating
Safety
OUT
OUT
Normal Operating Conditions
Inrush Transient
Standby/Off Mode
Output Short-Circuit Condition ➁
Current-Limiting Detection Point
Short-Circuit Detection Point
SC Protection Technique
Short-Circuit Current
Without Derating (Natural convection) –40 to +63/71°C (model dependent,
With Derating
V
Conducted or radiated,
FCC Part 15, EN55022
IN
Trim Range
Accuracy (50% load)
to V
A
= +25°C under nominal line voltage, 200 lfm air flow, and full-load conditions
OUT
➀
and On/Off to V
Dynamic Characteristics
OUT
Environmental
Physical
Output
Input
3-5.5 Volts (5V nominal) ➇
See Ordering Guide
0.02A
8mA
60-110mA average (model dependent)
Capacitive
None
None
None
On = open to +V
Off = 0 to +0.4V (1mA)
±1.5%
±0.02%/°C
No load
5000µF (electrolytic),
2000µF (0.02Ω ESR, OSCON)
±10% ➆
See Ordering Guide
3% over line/load/temperature
See Ordering Guide
19-30 Amps (model dependent)
98% of V
Hiccup with auto recovery
600mA average
30-70µsec to ±2% of final value
(model dependent)
7msec
300 ±50kHz
TBD
see Derating Curves)
see Derating Curves
+100°C
+115°C (110 to 125°C)
Class B
UL/IEC/EN60950-1, CSA-C22.2 No. 234
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)
UL94V-0
UL/cUL/IEC/EN 60950-1, CSA-C22.2 No. 234
2
sec
OUT
set
www.murata-ps.com
IN
(internal pull-up to +V
IN
)
➀ All models are tested/specified with external 22µF tantalum input and output capacitors.These
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 or the application of
➃ Output noise may be further reduced with the installation of additional external output filtering. See
➄ MTBF’s are calculated using Telcordia SR-332(Bellcore), ground fixed, T
➅ Input Ripple Current is tested/specified over a 5-20MHz bandwidth with an external 2 x 100µF input
➆ LSM-0.75/16-W3 can not be trimmed down.
➇ Input voltage must be 4.5V minimum for 3.3V output.
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.
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.
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.
I/O Filtering and Noise Reduction.
natural convection, +67°C pcb temperature.
capacitor and a simulated source impedance of 1000µF and 1µH. See I/O Filtering, Input Ripple
Current, and Output Noise for details.
Input Voltage:
On/Off Control (Pin 1)
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature
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.
Continuous or transient
Non-Isolated, Wide Input SMT DC/DC Converters
Technical enquiries email: [e-mail], tel:
LSM-16A W3 Models
Absolute Maximum Ratings
6 Volts (0.75, 1, 1.2, 1.5, 1.8, 2, 2.5 V
7 Volts (3.3V
+V
None
None
Current limited. Devices can
withstand sustained output short
circuits without damage.
–40 to +125°C
See Reflow Solder Profile
IN
MDC_LSM-16A_W3.A03 Page 3 of 12
OUT
and "T" models)
A
= +25°C, full power,
[phone]
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