MIC4720BML datasheet(4/21 Pages) MICREL

4 / 21 page

Micrel, Inc.

MIC4720

May 2007

M9999-051707

Absolute Maximum Ratings(1)

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

Output Switch Voltage (VSW). .........................................+6V

Output Switch Current (SW).............................................11A

Logic Input Voltage (VEN) .................................. –0.3V to VIN

Storage Temperature (Ts) .........................–60°C to +150°C

Operating Ratings(2)

Supply voltage (VIN) ..................................... +2.7V to +5.5V

Logic Input Voltage (VEN) ....................................... 0V to VIN

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

Junction Thermal Resistance

3mm×3mm MLF-12 (θJA) ...................................60°C/W

3mm×3mm MLF-12 (θJC)...................................10°C/W

10 pin ePad MSOP (θJA)....................................76°C/W

10 pin ePad MSOP (θJC)....................................28°C/W

Electrical Characteristics(3)

VIN = VEN = 3.6V; L = 1µH; COUT = 4.7µF; TA = 25°C, unless noted. Bold values indicate –40°C< TJ < +125°C.

Parameter

Condition

Min

Typ

Max

Units

Supply Voltage Range

2.7

5.5

Under-Voltage Lockout Threshold

(turn-on)

2.45

2.55

2.65

UVLO Hysteresis

100

Quiescent Current

VFB = 0.9 × VNOM (not switching)

570

900

µA

Shutdown Current

VEN = 0V

µA

[Adjustable] Feedback Voltage

± 2% (over temperature) ILOAD = 100mA

0.98

1.02

FB pin input current

Current Limit

VFB = 0.9 × VNOM

3.5

Output Voltage Line Regulation

VOUT > 2V; VIN = VOUT+500mV to 5.5V; ILOAD= 100mA

VOUT < 2V; VIN = 2.7V to 5.5V; ILOAD= 100mA

0.07

Output Voltage Load Regulation

20mA < ILOAD < 2A

0.2

Maximum Duty Cycle

VFB ≤ 0.4V

100

Switch ON-Resistance

ISW = 200mA VFB = GND (High Side Switch)

200

300

mΩ

Oscillator Frequency

1.8

2.0

2.2

MHz

Enable Threshold

0.5

0.85

1.3

Enable Hysteresis

Enable Input Current

0.1

2.3

µA

Power Good Range

±7

±10

Power Good Resistance

IPGOOD = 500µA

150

250

Ω

Over-Temperature Shutdown

160

°C

Over-Temperature Hysteresis

°C

Notes:

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

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

3. Specification for packaged product only.

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