Input

Input Voltage Range

4.5 to 5.5 Volts (5V nominal)

Input Current:

Normal Operating Conditions

See Ordering Guide

Inrush Transient

Standby/Off Mode

8mA

Output Short-Circuit Condition

110mA average

Input Reflected Ripple Current

10mAp-p

Input Filter Type

Capacitive (44μF)

Overvoltage Protection

None

Reverse-Polarity Protection

None

Undervoltage Shutdown

None

On/Off Control

Off = 0 to +0.8V (1ma max.)

Output

±1% maximum

Minimum Loading

No load

Maximum Capacitive Load

1000μF (low ESR, OSCON)

±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

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:

7msec

6msec

Switching Frequency:

300kHz (+40/–50kHz)

Environmental

Calculated MTBF

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)

Physical

Dimensions

1.3" x 0.53" x 0.34" (33.02 x 13.46 x 8.64 mm)

Pin Dimensions/Material

0.112" x 0.062" (2.84 x 1.57mm) rectangular

copper with gold plate over nickel underplate

Weight

0.28 ounces (7.8g)

Flammability Rating

UL94V-0

Safety

UL/cUL/IEC/EN 60950,

CSA-C22.2 No. 60950

Performance/Functional Specifications

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.

power, natural convection, +67°C pcb temperature.

TECHNICAL

NOTES

Input Voltage:

Continuous or transient

6 Volts

On/Off Control (Pin 1)

Input Reverse-Polarity Protection

None

Output Overvoltage Protection

None

Output Current

Current limited. Devices can

withstand sustained output

short

circuits

without damage.

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.

Absolute Maximum Ratings

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.

Figure 2. Measuring Input Ripple Current

LSM-10A D3 Models

10 Amp DC/DC’s in SMT Packages

www.murata-ps.com

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