June 2001

3

MIC4690

MIC4690

Micrel

Electrical Characteristics

V

Parameter

Condition

Min

Typ

Max

Units

Feedback Voltage

(

±1%)

1.217

1.230

1.243

V

(

±2%)

1.205

1.255

V

8V

≤ V

1.193

1.230

1.267

V

1.180

1.280

V

Maximum Duty Cycle

V

90

93

%

Quiescent Current

V

7

12

mA

Standby Quiescent Current

V

30

100

µA

V

1.5

µA

Frequency Foldback

V

220

300

KHz

Oscillator Frequency

450

500

550

kHz

Saturation Voltage

I

1.2

V

Output Leakage Current

V

50

500

µA

V

4

20

mA

Short Circuit Current Limit

V

1.3

2.5

3.0

A

Shutdown Pin Input Logic Level

regulator off

2

1.5

V

regulator on

1.25

0.8

V

Shutdown Pin Input Current

V

–10

–0.7

10

µA

V

–10

–1.5

10

µA

Thermal Shutdown @ T

J

160

°C

Note 1.

Exceeding the absolute maximum rating may damage the device.

Note 2.

With input voltages above the operating rating, the device may be damaged if a short-circuit is applied to the output. The device will otherwise

not be damaged up to its absolute maximum voltage rating.

Note 3.

Absolute maximum rating is intended for voltage transients only, prolonged dc operation is not recommended.

Note 4.

Devices are ESD sensitive. Handling precautions recommended.

Note 5.

Measured on 1" square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.

Supply Voltage (V

Shutdown Voltage (V

Steady-State Output Switch Voltage (V

Feedback Voltage (V

Storage Temperature (T

ESD Rating .............................................................. Note 4

Supply Voltage (V

Junction Temperature Range (T

Package Thermal Resistance

(θ

(θ