July 1998

3

MIC5201

MIC5201

Micrel

Electrical Characteristics

V

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

O

Output Voltage Accuracy

Variation from specified V

OUT

–1

1

%

–2

2

%

∆V

Output Voltage Temperature Coef.

Note 2

40

150

ppm/

°C

∆V

Line Regulation, Fixed

V

0.004

0.20

%

0.40

%

∆V

Line Regulation, Adjustable

V

0.004

0.20

%

0.40

%

∆V

Load Regulation

I

0.04

0.16

%

0.30

%

V

Dropout Voltage, Note 4

I

mV

I

130

mV

I

180

mV

I

225

mV

I

270

400

mV

I

GND

Quiescent Current

V

0.01

µA

I

GND

Ground Pin Current

I

130

µA

I

270

400

µA

I

500

µA

I

1000

2000

µA

I

3000

µA

PSRR

Ripple Rejection

75

dB

I

GNDDO

Ground Pin Current at Dropout

V

270

330

µA

I

I

LIMIT

Current Limit

V

280

500

mA

∆V

Thermal Regulation

Note 6

0.05

%/W

e

n

Output Noise

100

µV

Enable Input

V

IL

Input Voltage Level

logic low (off)

0.7

V

V

IH

Input Voltage Level

logic high (on)

2.0

V

I

IL

Enable Input Current

V

0.01

1

µA

I

IH

Enable Input Current

V

15

50

µA

Reference (MIC5201 Adjustable Version Only)

V

REF

Reference Voltage

1.223

1.242

1.255

V

1.217

1.267

V

I

IL

Reference Voltage Temp. Coef.

20

ppm/

°C

General Note: Devices are ESD sensitive. Handling precautions recommended.

Note 1:

Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when

operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a function of the maximum junction

temperature, T

dissipation at any ambient temperature is calculated using: P

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

θ

the MIC5201BM is 160

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

Note 2:

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

Note 3:

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 200mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

Note 4:

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 5:

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 6:

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 200mA load pulse at V