MIC3287 datasheet(3/9 Pages) MICREL

3 / 9 page

January 2006

M9999-010306

MIC3287

Micrel, Inc.

Absolute Maximum Ratings(1)

Supply Voltage (VIN)........................................................6V

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

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

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

Switch Current (ISW)..................................................... 1.2A

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

ESD Rating(3) ................................................................ 2kV

Operating Ratings(2)

Supply Voltage (VIN).........................................2.8V to 5.5V

Output Voltage (VOUT)(4) ...................................VIN to VOUT

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

Package Thermal Impedance

Thin SOT-23-5 (θJA)(5).......................................207°C/W

Thin SOT-23-6 (θJA)(5).......................................134°C/W

8-Pin MLF (θJA) ...................................................90°C/W

Electrical Characteristics(6)

TA = 25°C, VIN = VEN = 3.6V, VOUT = 10V, IOUT = 10mA, unless otherwise noted. Bold values indicate –40°C ≤ TJ ≤125°C.

Symbol

Parameter

Condition

Min

Typ

Max

Units

VIN

Supply Voltage Range

2.8

5.5

VUVLO

Under Voltage Lockout

1.8

2.1

2.4

IVIN

Quiescent Current

VFB > 500mV, (not switching)

2.1

ISD

Shutdown Current

VEN = 0V(7)

0.04

µA

VFB

Feedback Voltage

(±7.5%)

231

250

269

IFB

Feedback Input Current

VFB = 250mV

–450

Line Regulation

3V ≤ VIN ≤ 5V(8)

0.4

Load Regulation

5mA ≤ IOUT ≤ 20mA(8)

0.5

DMAX

Maximum Duty Cycle

ISW

Switch Current Limit

VIN = 3.6V

350

VSW

Switch Saturation Voltage

VIN = 3.6V, ISW = 300mA

250

ISW

Switch Leakage Current

VEN = 0V, VSW = 10V

0.01

µA

VEN

Enable Threshold

TURN ON

1.5

TURN OFF

0.4

IEN

Enable Pin Current

VEN = 10V

µA

fSW

Oscillator Frequency

1.2

1.4

MHz

VOVP

Overvoltage Protection

MIC3287 - 24YD6

MIC3287-24YML

Overtemperature

150

°C

Threshold Shutdown

Hysteresis

°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. 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. For options with OVP.

5. Using 4 layer PCB.

6. Speciﬁcation for packaged product only.

7. ISD = IVIN.

8. Guaranteed by design.

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