MIC5253

Micrel

V

Symbol

Parameter

Conditions

Min

Typical

Max

Units

V

O

Output Voltage Accuracy

I

–1.5

1.5

%

–33

%

∆V

LNR

Line Regulation

V

0.035

0.05

%/V

∆V

LDR

Load Regulation

I

1.5

2.5

%

V

I

80

150

mV

I

165

300

mV

I

Q

Quiescent Current

V

0.2

1

µA

I

GND

I

75

100

µA

I

90

150

µA

PSRR

Ripple Rejection

f = 100Hz, C

dB

f = 1kHz, V

dB

f = 10kHz, V

dB

t

ON

Turn-On Time

30

150

µs

I

LIM

Current Limit

V

150

250

450

mA

e

n

Output Voltage Noise

C

30

µV(rms)

f = 10Hz to 100kHz

Enable Input

V

IL

Enable Input Logic-Low Voltage

V

0.4

V

V

IH

Enable Input Logic-High Voltage

V

1.6

V

I

EN

Enable Input Current

V

0.01

µA

V

0.01

µA

Thermal Protection

Thermal Shutdown Temperature

150

°C

Thermal Shutdown Hysteresis

10

°C

Notes:

1.

Exceeding the absolute maximum ratings may damage the device.

2.

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

3.

The maximum allowable power dissipation of any T

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

θ

400

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

4.

Devices are ESD sensitive. Handling precautions recommended.

5.

Specification for packaged product only.

6.

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 100mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

7.

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.

8.

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.

Supply Input Voltage (V

Enable Input Voltage (V

Power Dissipation (P

(3)

Junction Temperature (T

Storage Temperature ............................... –65

°C to +150°C

Lead Temperature (soldering, 5 sec.) ....................... 260

°C

Input Voltage (V

Enable Input Voltage (V

Junction Temperature (T

Thermal Resistance

SC-70-5

(θ

M9999-112305

November 2005

3