MIC4722 datasheet(3/20 Pages) MICREL

3 / 20 page

Micrel, Inc.

MIC4722

September 2007

M9999-090507-B

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

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

EDS Rating

(3).................................................................. 2kV

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

3x3 MLF-12 (θJA) ...............................................60°C/W

Electrical Characteristics

(4)

VIN = VEN = 3.6V; L = 0.47µH; 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

± 1% ILOAD = 100mA

± 2% (over temperature) ILOAD = 100mA

0.99

0.98

1.01

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 < 3A

0.2

Maximum Duty Cycle

VFB ≤ 0.4V

100

Switch ON-Resistance

ISW = 50mA VFB = 0.7VFB_NOM (High Side Switch)

200

300

mΩ

Oscillator Frequency

2.4

2.7

3.0

MHz

Enable Threshold

0.5

0.85

1.3

Enable Hysteresis

Enable Input Current

0.1

µA

Power Good Range

±7

±10

Power Good Resistance

IPGOOD = 500µA

145

200

Ω

Over-Temperature Shutdown

150

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

4. Specification for packaged product only.

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