Micrel, Inc.

MIC2238

April 2010

5

M9999-040810-A

Electrical Characteristics (cont.)

(4)

Parameter

Condition

Min

Typ

Max

Units

Protection

Current Limit

0.9

1.2

1.8

A

Over Temperature

Shutdown Hysteresis

20

°C

Control

Maximum Duty Cycle

100

%

Oscillator

PWM Mode Frequency

2.125

2.5

2.875

MHz

Power Good

Power Good Reset

Threshold

Upper Threshold

Lower Threshold

-14

6.25

-8.5

12

%

PGOOD Series

Resistance

1

1.4

kΩ

PGOOD Pull-Up Current

Output within 8.5% of regulation

5

µA

Power Switch

Switch On-Resistance

0.4

0.35

Ω

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.

4. Specification for packaged product only.