August 2004

3

M9999-081104

MIC2290

Micrel

Supply Voltage (V

Switch Voltage (V

Enable Pin Voltage (V

FB Voltage (V

Switch Current (I

Storage Temperature (T

Supply Voltage (V

Junction Temperature Range (T

Package Thermal Impedance

2mm

× 2mm MLF™ (θ

T

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

IN

Supply Voltage Range

2.5

10

V

V

UVLO

Undervoltage Lockout

1.8

2.1

2.4

V

I

VIN

Quiescent Current

V

2.5

5

mA

I

SD

Shutdown Current

V

(5)

0.2

1

µA

V

FB

Feedback Voltage

(

±1%)

1.227

1.24

1.252

V

(

±2%) (Over Temp)

1.215

1.265

V

I

FB

Feedback Input Current

V

–450

nA

Line Regulation

3V

≤ V

0.1

1

%

Load Regulation

5mA

≤ I

0.2

1

%

D

MAX

Maximum Duty Cycle

85

90

%

I

SW

Switch Current Limit

0.75

A

V

SW

Switch Saturation Voltage

I

450

mV

I

SW

Switch Leakage Current

V

0.01

5

µA

V

EN

Enable Threshold

Turn on

1.5

V

Turn off

0.4

V

I

EN

Enable Pin Current

V

20

40

µA

f

SW

Oscillator Frequency

1.05

1.2

1.35

MHz

V

D

Schottky Forward Drop

I

0.8

1

V

I

RD

Schottky Leakage Current

V

4

µA

V

OVP

Overvoltage Protection

(nominal voltage)

30

32

34

V

T

J

Overtemperature

150

°C

Threshold Shutdown

Hysteresis

10

°C

Notes:

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 operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, T

the junction-to-ambient thermal resistance,

θ

die temperature, and the regulator will go into thermal shutdown.

2. This device is not guaranteed to operate beyond its specified operating rating.

3. IC devices are inherently ESD sensitive. Handling precautions required. Human body model rating: 1.5K in series with 100pF.

4. Specification for packaged product only.

5. I