August, 2004

3

M9999-081104

MIC2291

Micrel

Supply Voltage (V

Switch Voltage (V

Enable Pin Voltage (V

FB Voltage (V

Switch Current (I

Ambient Storage Temperature (T

Supply Voltage (V

Junction Temperature Range (T

Package Thermal Impedance

8-lead 2mm

× 2mm MLF™ (θ

Thin SOT-23-5 (

θ

T

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

IN

Supply Voltage Range

2.5

10

V

V

UVLO

Under Voltage Lockout

1.8

2.1

2.4

V

I

VIN

Quiescent Current

V

2.8

5

mA

I

SD

Shutdown Current

V

(5)

0.1

1

µA

V

FB

Feedback Voltage

(

±5%)

90

95

100

mV

I

FB

Feedback Input Current

V

–450

nA

Line Regulation

3V

≤ V

0.5

1

%

Load Regulation

5mA

≤ I

0.5

2

%

D

MAX

Maximum Duty Cycle

85

90

%

I

SW

Switch Current Limit

1.2

A

V

SW

Switch Saturation Voltage

I

550

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

(6)

20

40

µA

f

SW

Oscillator Frequency

1.05

1.2

1.35

MHz

V

OVP

Overvoltage Protection

MIC2291BML- 15 only

13

14

16

V

MIC2291BML- 34 only

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 ratings.

3. Devices are inherently ESD sensitive. Handling precautions required. Human body model.

4. Specification for packaged product only.

5. I

6. See “Typical Characteristics ”section for other V