MIC2267 datasheet(3/19 Pages) MICREL

3 / 19 page

Micrel Inc.

MIC2267

January 2011

M9999-011711-A

Absolute Maximum Ratings (1)

Supply Voltage (VIN)........................................ −0.3V to +6V

Output Switch Voltage (VSW) ........................... −0.3V to +6V

Power Good Voltage (VPGOOD) ........................ −0.3V to +6V

Enable Input Voltage (VEN)................................ −0.3V to VIN

Feedback Voltage (VFB) .................................... −0.3V to VIN

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

−0.3V to +0.3V

Switch Current (ISW) .................................Internally Limited

Power Dissipation .....................................Internally Limited

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

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

ESD Human Body Model Rating

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

ESD Machine Model Rating

(3) .....................................200V

Operating Ratings (2)

Supply Voltage (VIN)..................................... +3.0V to +5.5V

Power Good Voltage (VPGOOD) ......................... 0V to +5.5V

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

Feedback Voltage (VFB) ........................................ 0V to VIN

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

−0.3V to +0.3V

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

Junction Thermal Resistance

3mm x 3mm MLF

®-12(θJA).................................61°C/W

3mm x 3mm MLF

®-12(θJC).................................27°C/W

Electrical Characteristics (4)

VIN = VEN = 5.0V, VOUT = 3.3V, ILOAD = 10mA, CIN = 10µF, L = 4.7µH, COUT = 47µF, RFREQ = 100kΩ; RSLOPEC = 100kΩ, RLIM = 100kΩ,

RCOMP = 11.5kΩ, CCOMP = 15nF, TA = 25°C; bold values indicate –40°C ≤ TJ ≤ 125°C; unless noted.

Parameter

Conditions

Min.

Typ.

Max.

Units

Power Input Supply

Input Voltage Range (VIN)

3.0

5.5

VIN UVLO Threshold

Rising

2.75

2.9

3.0

VIN UVLO Hysteresis

320

Quiescent Current

PWM Mode, VEN > 1.8V, VFB = 0.9V, IOUT = 0A

Shutdown Current

VEN = 0V

µA

Reference Voltage

Feedback Voltage

±2% over temperature

0.98

1.02

Feedback Bias Current

VFB = 1V

Output Voltage Line Regulation

VIN = VEN = 4V to 5.5V, ILOAD = 100mA

0.2

Output Voltage Load Regulation

100mA < ILOAD < 1.2A

0.2

Enable Control

Enable Logic High Threshold

1.2

1.8

Enable Logic Low Threshold

0.4

Input Current Limit

VFB = 0.5V, RLIMIT = 107kΩ

0.5

0.7

0.9

VFB = 0.5V, RLIMIT = 68.1kΩ

0.7

1.1

1.5

Input Current Limit

VFB = 0.5V, RLIMIT = 46.4kΩ

1.1

1.6

2.1

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, 1.5kΩ in series with 100pF.

4. Specification for packaged product only.

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