MIC5245

Micrel

June 2000

3

MIC5245

Electrical Characteristics

V

Symbol

Parameter

Conditions

Min

Typical

Max

Units

V

O

Output Voltage Accuracy

I

–11

%

–22

%

∆V

LNR

Line Regulation

V

–0.3

0

0.3

%/V

∆V

LDR

Load Regulation

I

2.0

3.0

%

V

Dropout Voltage, Note 5

I

1.5

5

mV

I

50

85

mV

I

100

150

mV

I

150

200

mV

250

mV

I

Q

Quiescent Current

V

0.2

1

µA

I

GND

Ground Pin Current, Note 6

I

100

150

µA

I

100

µA

PSRR

Power Supply Rejection

f = 120Hz, C

dB

I

LIM

Current Limit

V

160

300

mA

e

n

Output Voltage Noise

C

30

µV(rms)

f = 10Hz to 100kHz

Enable Input

V

IL

Enable Input Logic-Low Voltage

V

0.8

0.4

V

V

IH

Enable Input Logic-High Voltage

V

2.0

1V

I

EN

Enable Input Current

V

0.17

µA

V

1.5

µA

Shutdown Resistance Discharge

500

Ω

Thermal Protection

Thermal Shutdown Temperature

150

°C

Thermal Shutdown Hysteresis

10

°C

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.

Note 4.

Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load

range from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

Note 5.

Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V

differential. For outputs below 2.7V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.7V. Minimum

input operating voltage is 2.7V.

Note 6.

Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground

pin current.