MIC5205

Micrel

June 2000

3

MIC5205

Electrical Characteristics

V

Symbol

Parameter

Conditions

Min

Typical

Max

Units

V

O

Output Voltage Accuracy

variation from specified V

OUT

–11

%

–22

%

∆V

Output Voltage

Note 4

40

ppm/

°C

Temperature Coefficient

∆V

Line Regulation

V

0.004

0.012

% / V

0.05

% / V

∆V

Load Regulation

I

0.02

0.2

%

0.5

%

V

Dropout Voltage, Note 6

I

50

mV

70

mV

I

110

150

mV

230

mV

I

140

250

mV

300

mV

I

165

275

mV

350

mV

I

GND

Quiescent Current

V

0.01

1

µA

V

5

µA

I

GND

Ground Pin Current, Note 7

V

125

µA

150

µA

I

350

600

µA

800

µA

I

600

1000

µA

1500

µA

I

1300

1900

µA

2500

µA

PSRR

Ripple Rejection

frequency = 100Hz, I

dB

I

LIMIT

Current Limit

V

320

500

mA

∆V

Thermal Regulation

Note 8

0.05

%/W

e

no

Output Noise

I

260

nV/ Hz

470pF from BYP to GND

ENABLE Input

V

IL

Enable Input Logic-Low Voltage

regulator shutdown

0.4

V

0.18

V

V

IH

Enable Input Logic-High Voltage

regulator enabled

2.0

V

I

IL

Enable Input Current

V

0.01

–1

µA

V

–2

µA

I

IH

V

2

5

20

µA

V

25

µA

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:

The maximum allowable power dissipation at any T

allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The

θ

xxBM5 (all versions) is 220

°C/W mounted on a PC board (see “Thermal Considerations” section for further details).

Note 4:

Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.

Note 5:

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 6:

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.

Note 7:

Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of

the load current plus the ground pin current.

Note 8:

Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line

regulation effects. Specifications are for a 150mA load pulse at V