Microchip MIC5203 Handleiding

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MIC5203

Features

•Tiny 4- and 5-Lead Surface-Mount Packages

•Wide Selection of Output Voltages

•Guaranteed 80 mA Output

•Low Quiescent Current

•Low Dropout Voltage

•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

•Barcode Scanners

•SMPS Post-Regulator and DC/DC Modules

•High-Efficiency Linear Power Supplies

General Description

The MIC5203 is a µCap 80 mA linear voltage regulator

with very low dropout voltage (typically 20 mV at light

loads and 300mV at 80 mA) and very low ground

current (225 µA at 20 mA output), offering better than

3% initial accuracy with a logic-compatible enable

input.

The µCap regulator design is optimized to work with

low- value, low-cost ceramic capacitors. The outputs

typically require only 0.47 µF 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.

Package Types

MIC5203

4-Lead SOT-143 (M4)

GN D

O U TIN

E N

L A x x

Part

Identification

12

3 4

MIC5203

5-Lead SOT-23 (M5)

IN

O U T

N C

E N

L K xx

13

4 5

2

GND

µCap 80mA LDO Regulator

Product specificaties