MIC5248

Micrel

November 2002

3

MIC5248

Electrical Characteristics

V

Symbol

Parameter

Conditions

Min

Typical

Max

Units

V

O

Output Voltage Accuracy

I

–33

%

–44

%

∆V

LNR

Line Regulation

V

–0.3

0

0.3

%/V

∆V

LDR

Load Regulation

I

4.0

5.0

%

I

Q

Quiescent Current

V

0.45

1

µA

I

GND

Ground Pin Current, Note 5

I

100

150

µA

I

100

150

µA

PSRR

Power Supply Rejection

f = 120Hz, C

60

dB

I

LIM

Current Limit

V

160

350

mA

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

Power Good, Note 6

V

PG

Low Threshold

% of V

89.5

%

High Threshold

% of V

96.5

%

V

OL

PG Output Logic-Low Voltage

I

0.02

0.1

V

I

PG

Power Good Leakage Current

power good off, V

0.01

µA

V

Delay Time to Power Good

See “Timing Diagram”

15

ms

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.

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.

Note 6.

The power good is a function of the output voltage being 5% low and the detection of one of the following: overcurrent, over-temperature or

dropout. See “Applications Information” section for additional information.

Supply Input Voltage (V

Enable Input Voltage (V

Flag Output Voltage (V

Junction Temperature (T

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

°C to +150°C

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

°C

ESD, Note 3

Input Voltage (V

Enable Input Voltage (V

Flag Output Voltage (V

Junction Temperature (T

Thermal Resistance

SOT-23

(θ