Micrel, Inc.

MIC2290

October 2007

3

M9999-101907

Absolute Maximum Ratings

(1)

Supply Voltage (VIN).......................................................12V

Switch Voltage (VSW)....................................... –0.3V to 34V

Enable Pin Voltage (VEN)................................... –0.3V to VIN

FB Voltage (VFB)...............................................................6V

Switch Current (ISW) .........................................................2A

Storage Temperature (Ts) .........................–65°C to +150°C

ESD Rating

(3).................................................................. 2kV

Operating Ratings

(2)

Supply Voltage (VIN).......................................... 2.5V to 10V

Ambient Temperature (TJ).........................–40°C to +125°C

Package Thermal Resistance

2x2 MLF-8 (

θJA) .................................................93°C/W

Electrical Characteristics

(4)

TA = 25°C, VIN = VEN = 3.6V, VOUT = 15V, IOUT = 40mA, unless otherwise noted. Bold values indicate –40°C ≤ TJ ≤ ±125°C.

Symbol

Parameter

Condition

Min

Typ

Max

Units

VIN

Supply Voltage Range

2.5

10

V

VUVLO

Undervoltage Lockout

1.8

2.1

2.4

V

IVIN

Quiescent Current

VFB = 2V, (not switching)

2.5

5

mA

ISD

Shutdown Current

VEN = 0V, Note 5

0.2

1

µA

VFB

Feedback Voltage

(±1%)

(±2%) (Over Temp)

1.227

1.215

1.24

1.252

1.265

V

V

IFB

Feedback Input Current

VFB = 1.24V

–450

nA

Line Regulation

3V ≤ VIN ≤ 5V

0.1

1

%

Load Regulation

5mA ≤ IOUT ≤ 20mA

0.2

%

DMAX

Maximum Duty Cycle

85

90

%

ISW

Switch Current Limit

0.75

A

VSW

Switch Saturation Voltage

ISW = 0.5A

450

mV

ISW

Switch Leakage Current

VEN = 0V, VSW = 10V

0.01

5

µA

VEN

Enable Threshold

Turn on

Turn off

1.5

0.4

V

V

IEN

Enable Pin Current

VEN = 10V

20

40

µA

fSW

Oscillator Frequency

1.05

1.2

1.35

MHz

VD

Schottky Forward Drop

ID = 150mA

0.8

1

V

IRD

Schottky Leakage Current

VR = 30V

4

µA

VOVP

Overvoltage Protection

(nominal voltage)

30

32

34

V

TJ

Overtemperature

Threshold Shutdown

Hysteresis

150

10

°C

°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, TJ(max), the

junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation will result in excessive die

temperature, and the regulator will go into thermal shutdown.

2. The device is not guaranteed to function outside its 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. ISD = IVIN.