MIC49300 datasheet(3/8 Pages) MICREL

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October 2003

MIC49300

Micrel

Electrical Characteristics

A = 25°C with VBIAS = VOUT +2.1V; VIN = VOUT + 1V; bold values indicate –40°C<TJ < +125°C, Note 4; unless otherwise specified.

Parameter

Conditions

Min

Typ

Max

Units

Output Voltage Accuracy

At 25°C, fixed voltage options

–1

Over temperature range

–2

Line Regulation

IN = 2.0V to 6.5V

–0.1

0.01

+0.1

%/V

Load Regulation

L = 0mA to 3A

0.2

0.5

Dropout Voltage (V

IN – VOUT)IL = 1.5A

125

200

L = 3A

280

400

Dropout Voltage (V

BIAS – VOUT)IL = 3A

1.5

2.1

Note 4

Ground Pin Current, Note 5

L = 0mA

L = 3A

Ground Pin Current in Shutdown

EN ≤ 0.6V, (IBIAS + ICC), Note 6

0.07

µA

Current thru V

BIAS

L = 0mA

L = 3A

150

Current Limit

OUT = 0V

6.5

Enable Input, Note 6

Enable Input Threshold

Regulator enable

1.6

(Fixed Voltage only)

Regulator shutdown

0.6

Enable Pin Input Current

0.1

1.0

µA

Reference

Reference Voltage

Adjustable option only

0.891

0.9

0.909

0.882

0.918

Note 1.

Exceeding the absolute maximum rating may damage the device.

Note 2.

The device is not guaranteed to function outside its operating rating.

Note 3.

Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

Note 4.

For V

OUT ≤1V, VBIAS dropout specification does not apply due to a minimum 3V VBIAS input.

Note 5.

GND = IBIAS + (IIN – IOUT). At high loads, input current on VIN will be less than the output current, due to drive current being supplied by VBIAS.

Note 6.

Fixed output voltage versions only.

Absolute Maximum Ratings (Note 1)

Supply Voltage (V

IN) ....................................................... 8V

Bias Supply Voltage (V

BIAS) ............................................ 8V

Enable Input Voltage (V

EN) ............................................. 8V

Power Dissipation .................................... Internally Limited

ESD Rating, Note 3 ...................................................... 2kV

Operating Ratings (Note 2)

Supply Voltage (V

IN) ....................................... 1.4V to 6.5V

Bias Supply Voltage (V

BIAS) ............................... 3V to 6.5V

Enable Input Voltage (V

EN) .................................. 0V to VIN

Junction Temperature Range ............. –40°C ≤TJ ≤ +125°C

Package Thermal Resistance

S-PAK(θJC) ............................................................ 2°C/W

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