MIC28304 datasheet(4/39 Pages) MICREL

4 / 39 page

Micrel, Inc.

MIC28304

Absolute Maximum Ratings

(1)

PVIN, VIN to PGND ...................................... –0.3V to +76V

PVDD, VANODE to PGND .................................. –0.3V to +6V

VSW, VFREQ, VILIM, VEN........................ −0.3V to (PVIN +0.3V)

VBSTC/BSTR to VSW ................................................ −0.3V to 6V

VBSTC/BSTR to PGND.......................................... −0.3V to 82V

VFB, VPG to PGND .........................−0.3V to (PVDD + 0.3V)

PGND to AGND............................................

−0.3V to +0.3V

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

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

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

ESD Rating

(3)................................................. ESD Sensitive

Operating Ratings

(2)

Supply Voltage (PVIN, VIN) .............................. 4.5V to 70V

Enable Input (VEN) .................................................0V to VIN

VSW, VFEQ, VILIM, VEN ..............................................0V to VIN

Power Good (VPGOOD)..………………..……… ...0V to PVDD

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

Junction Thermal Resistance

12mm × 12mm QFN-64 (

JA) ............................ 20°C/W

12mm × 12mm QFN-64 (

JC)............................... 5°C/W

Electrical Characteristics

(4)

PVIN = VIN = 12V, VOUT = 5V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate −

40°C ≤ TJ ≤ +125°C.

Parameter

Condition

Min.

Typ.

Max.

Units

Power Supply Input

Input Voltage Range (PVIN, VIN)

4.5

Controller Supply Current

(5)

Current into Pin 60; VFB = 1.5V (MIC28304-1)

0.4

0.75

Current into Pin 60;VFB = 1.5V (MIC28304-2)

2.1

Current into Pin 60;VEN = 0V

0.1

µA

Operating Current

IOUT = 0A (MIC28304-1)

0.7

IOUT = 0A (MIC28304-2)

Shutdown Supply Current

PVIN = VIN = 12V, VEN = 0V

µA

PVDD Supply

(5)

PVDD Output Voltage

VIN = 7V to 70V, IPVDD = 10mA

4.8

5.2

5.4

PVDD UVLO Threshold

PVDD rising

3.8

4.2

4.7

PVDD UVLO Hysteresis

400

Load Regulation

IPVDD = 0 to 40mA

0.6

3.6

Reference

(5)

Feedback Reference Voltage

TJ = 25°C (±1.0%)

0.792

0.8

0.808

−

40°C ≤ TJ ≤ 125°C (±2%)

0.784

0.8

0.816

FB Bias Current

VFB = 0.8V

500

Notes:

Exceeding the absolute maximum ratings may damage the device.

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

Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5k

Ω in series with 100pF.

Specification for packaged product only.

IC tested prior to assembly.

March 25, 2014

Revision 1.1

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