MM1349 데이터 시트보기 (PDF) - Mitsumi

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MM1349

Step-Up DC/DC Converter (PWM)

Mitsumi 

MITSUMI

Step-Up DC/DC Converter (PWM) MM1349

Step-Up DC/DC Converter (PWM)

Monolithic IC MM1349

Outline

This is a converter IC which steps up the DC input voltage to output a fixed voltage level. Utilizing technology

for low-voltage operation, which is a feature of Mitsumi semiconductor processes, operation is possible

beginning at 0.90V, making this device ideal for the power supply circuits of portable equipment driven by a

single battery.

Because PWM oscillation is adopted, an output waveform can be obtained with a smaller peak-to-peak

voltage than is possible for VFM devices.

Features

1. Low-voltage operation possible, 0.90V (no-load)

2. Internal oscillation circuit

3. Adoption of PWM oscillation for output waveform with small peak-to-peak voltage

4. Numerous output voltages available (seven ranks)

Package

SOT-25

Output Voltage Rank

Rank

ABCDEGH

Voltage (V) 5.0 3.5 3.2 3.0 2.7 2.5 2.2

Applications

1. Pagers

2. Separate vibrators

3. Other portable equipment

Pin Assignment

5

4

1 23

SOT-25

1

GND

2

SUB

3

VL

4

VOUT

5

VIN

*Pin 2 is the SUB pin, and should be connected to GND.

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