MIC5203-3.3BM4 Micrel Inc, MIC5203-3.3BM4 Datasheet

MIC5203-3.3BM4

Manufacturer Part Number

MIC5203-3.3BM4

Description

Manufacturer

Micrel Inc

Datasheet

1.MIC5203-3.3BM4.pdf (7 pages)

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Bonase Electronics (HK) Co., Limited

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MIC5203-3.3BM4

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MIC

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MIC5203-3.3BM4

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December 1998

MIC5203

General Description

The MIC5203 is a Cap™ 80mA linear voltage regulator with

very low dropout voltage (typically 20mV at light loads and

300mV at 80mA) and very low ground current (225 A at

20mA output), offering better than 3% initial accuracy with a

logic-compatible enable input.

The Cap™ regulator design is optimized to work with low-

value, low-cost ceramic capacitors. The outputs typically

require only 0.47 F of output capacitance for stability.

Designed especially for hand-held, battery-powered devices,

the MIC5203 can be controlled by a CMOS or TTL compatible

logic signal. When disabled, power consumption drops nearly

to zero. If on-off control is not required, the enable pin may be

tied to the input for 3-terminal operation. The ground current

of the MIC5203 increases only slightly in dropout, further

prolonging battery life. Key MIC5203 features include current

limiting, overtemperature shutdown, and protection against

reversed battery.

The MIC5203 is available in 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,

4.0V, 4.5V, 4.75V, and 5.0V fixed voltages. Other voltages

are available; contact Micrel for details.

Typical Applications

Shutdown

Enable

SOT-23-5 Version

SOT-143 Version

LAxx

0.47µF

OUT

0.47µF

OUT

Ordering Information

Other voltages available. Contact Micrel for details.

Part Number

MIC5203-3.0BM4

MIC5203-3.3BM4

MIC5203-3.6BM4

MIC5203-3.8BM4

MIC5203-4.0BM4

MIC5203-4.5BM4

MIC5203-4.7BM4

MIC5203-5.0BM4

MIC5203-2.8BM5

MIC5203-3.0BM5

MIC5203-3.3BM5

MIC5203-3.6BM5

MIC5203-3.8BM5

MIC5203-4.0BM5

MIC5203-4.5BM5

MIC5203-4.7BM5

MIC5203-5.0BM5

3-141

Marking

LA30

LA33

LA36

LA38

LA40

LA45

LA47

LA50

LA28

LK30

LK33

LK36

LK38

LK40

LK45

LK47

LK50

Features

• Tiny 4-lead and 5-lead surface-mount packages

• Wide Selection of output voltages

• Guaranteed 80mA output

• Low quiescent current

• Low dropout voltage

• Tight load and line regulation

• Low temperature coefficient

• Current and thermal limiting

• Reversed input polarity protection

• Zero off-mode current

• Logic-controlled shutdown

• Stability with low-ESR ceramic capacitors

Applications

• Cellular telephones

• Laptop, notebook, and palmtop computers

• Battery-powered equipment

• Bar code scanners

• SMPS post-regulator/dc-to-dc modules

• High-efficiency linear power supplies

Cap™ 80mA Low-Dropout Voltage Regulator

Voltage

4.75V

3.0V

3.3V

3.6V

3.8V

4.0V

4.5V

5.0V

2.8V

3.0V

3.3V

3.6V

3.8V

4.0V

4.5V

5.0V

Junction Temp. Range

MIC5203

–40 C to +125 C

SOT-23-5

Package

SOT-143

Micrel

Related parts for MIC5203-3.3BM4

MIC5203-3.3BM4 Summary of contents

Page 1

... Laptop, notebook, and palmtop computers • Battery-powered equipment • Bar code scanners • SMPS post-regulator/dc-to-dc modules • High-efficiency linear power supplies Ordering Information Part Number Marking Voltage MIC5203-3.0BM4 LA30 3.0V MIC5203-3.3BM4 LA33 3.3V MIC5203-3.6BM4 LA36 3.6V MIC5203-3.8BM4 LA38 3.8V MIC5203-4.0BM4 LA40 4.0V MIC5203-4 ...

Page 2

... MIC5203 Pin Configuration Pin Description Pin Number Pin Number Pin Name SOT-143 SOT-23 Absolute Maximum Ratings Input Supply Voltage (V ) ............................ –20V to +20V IN Enable Input Voltage (V ) ........................... –20V to +20V EN Power Dissipation (P ) ............................ Internally Limited D Storage Temperature Range (T ) ............ – +150 C S Lead Temperature (Soldering, 5 sec.) ...................... 260 C ...

Page 3

... MIC5203 Electrical Characteristics 1V 1mA 0. OUT L L Symbol Parameter V Output Voltage Accuracy Output Voltage Temp. Coefficient Line Regulation Load Regulation –V Dropout Voltage, Note Quiescent Current Q I Ground Pin Current, Note 7 GND I Ground Pin Current at Dropout GNDDO I Current Limit LIMIT V P Thermal Regulation ...

Page 4

... MIC5203 Typical Characteristics Dropout Voltage vs. Output Current 1000 OUT 100 10 1 0.01 0 100 OUTPUT CURRENT (mA) Ground Current vs. Output Current 2000 1500 1000 500 OUT OUTPUT CURRENT (mA) Output Voltage vs. Output Current 4.0 3.5 3.0 2 2.0 OUT 1.5 1.0 0.5 0 100 150 200 ...

Page 5

... MIC5203 Load Transient 200 0 -200 Awaiting Further Characterization -400 200 Data C = 0.1 F OUT OUT TIME (ms) Line Transient Awaiting Further -1 Characterization -2 3 Data 0 1mA - -0.2 0.0 0.2 0.4 0.6 0.8 1.0 TIME (ms) Ripple Voltage vs. Frequency 100 80 Awaiting Further 60 Characterization Data 100 0.1 F ...

Page 6

... MIC5203 Output Impedance 1000 100 I = 100 1mA 100mA L 0.1 0.01 FREQUENCY (Hz) Enable Characteristics (3.3V Version Awaiting Further 1 Characterization 0 Data - 0 100 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 TIME (ms) Enable Characteristics (3.3V Version 100 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 TIME (ms) Enable Voltage vs ...

Page 7

... Tantalum or ceramic capacitors are recommended for operation below –25C . No-Load Stability The MIC5203 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. ...

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