MIC24085AYML datasheet(3/16 Pages) MICREL

3 / 16 page

Micrel, Inc.

MIC24085

October 22, 2013

Revision 1.1

Absolute Maximum Ratings(1)

VVCC to PGND................................................ −0.3V to +20V

VSW to PGND................................................. −0.3V to +20V

VEN, VFB, VPG, to GND..................................... −0.3V to + 6V

VBST to VSW ..................................................... −0.3V to + 6V

VBST to PGND................................................ −0.3V to +26V

PGND to GND............................................. −0.3V to + 0.3V

Junction Temperature .............................................. +150°C

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

Lead Temperature (soldering, 10sec)........................ 260°C

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

Operating Ratings(2)

Supply Voltage (VVCC) ....................................... 4.5V to 18V

Output Current ................................................................3A

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

Junction Thermal Resistance

MLF-16 (θJA) .....................................................68°C/W

MLF-16 (θJC) ....................................................7.5°C/W

Electrical Characteristics(4)

VVCC = 12V; TA = 25°C, unless noted.

Bold values indicate −40°C ≤ TJ ≤ +125°C.

Parameter

Condition

Min.

Typ.

Max.

Units

Power Supply Input

VCC Input Voltage Range

4.5

Quiescent Supply Current

No Switching, VFB = 1.5V

2.3

Shutdown Supply Current

VEN = 0V

µA

VCC UVLO Threshold

4.3

4.5

VCC UVLO Hysteresis

650

Reference (MIC24085AYML)

Feedback Reference Voltage

-40°C ≤ TJ ≤ +125°C (±1.5%)

0.886

0.9

0.914

FB Bias Current

VFB = 0.6V

500

Soft-Start Time

Load Regulation

IOUT = 100mA to 3A

0.5

Line Regulation

VVCC = 4.5V to 18V

0.5

Enable Control

EN Logic Level High

2.2

EN Logic Level Low

0.8

EN Hysteresis

480

EN Bias Current

VEN = 5V

3.5

µA

VEN = 0V

-1.5

PWM

Switching Frequency

VFB = 0.9V

0.9

1.0

1.1

MHz

Foldback Switching Frequency

VFB < 60% × 0.9V

250

kHz

Maximum Duty Cycle

VFB = 0V, 1MHz

Minimum Duty Cycle

VFB = 1V

Notes:

1. Exceeding the absolute maximum ratings may damage the device.

2. The device is not guaranteed to function outside its operating ratings.

3. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.

4. Specification for packaged product only.

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