MIC2291 datasheet(3/10 Pages) MICREL

3 / 10 page

Micrel, Inc.

MIC2291

May 2007

M9999-051507

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

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

Package Thermal Resistance

2x2 MLF-8 (θJA) .................................................93°C/W

Thin SOT23-5 (θJA)..........................................256°C/W

Electrical Characteristics

(4)

TA = 25°C, VIN = VEN = 3.6V; VOUT = 10V; IOUT = 40mA, bold values indicate –40°C< TJ < +125°C, unless noted.

Symbol

Parameter

Condition

Min

Typ

Max

Units

VIN

Supply Voltage Range

2.5

VUVLO

Under Voltage Lockout

1.8

2.1

2.4

IVIN

Quiescent Current

VFB > 200mV, (not switching)

2.8

ISD

Shutdown Current

VEN = 0V(5)

0.1

µA

VFB

Feedback Voltage

(±5%)

100

IFB

Feedback Input Current

VFB = 95mV

–450

Line Regulation(7)

3V ≤ VIN ≤ 5V

0.5

Load Regulation(7)

5mA ≤ IOUT ≤ 40mA

0.5

DMAX

Maximum Duty Cycle

ISW

Switch Current Limit

1.2

VSW

Switch Saturation Voltage

ISW = 1.0A

550

ISW

Switch Leakage Current

VEN = 0V, VSW = 10V

0.01

µA

VEN

Enable Threshold

TURN ON

TURN OFF

1.5

0.4

IEN

Enable Pin Current

VEN = 10V(6)

µA

fSW

Oscillator Frequency

1.05

1.2

1.35

MHz

VOVP

Overvoltage Protection

MIC2291BML- 15 only

MIC2291BML- 34 only

Overtemperature

Threshold Shutdown

Hysteresis

150

°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. Devices are ESD sensitive. Handling precautions recommended. Human body model.

4. Specification for packaged product only.

5. ISD = IVIN.

6. See “Typical Characteristics” section for other VEN.

7. Guaranteed by design.

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