MIC4812 datasheet(3/12 Pages) MICREL

3 / 12 page

Micrel Inc.

MIC4812

January 2011

M9999-010511-A

Absolute Maximum Ratings(1)

Main Input Voltage (VIN) .................................. –0.3V to +6V

Enable Input Voltage (VEN).............................. –0.3V to +6V

LED Driver Voltage (VD1-D6) ............................ –0.3V to +6V

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

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

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

ESD Rating

(3)...............................................................1.5kV

Operating Ratings(2)

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

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

LED Driver Voltage (VD1-D6) ................................... 0V to VIN

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

Junction Thermal Resistance

ePad MSOP-10L (

θJA) ....................................76.7°C/W

Electrical Characteristics

VIN = VEN = 5V, RSET = 8.25kΩ; VD1-D6 = 1.2V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ 125°C; unless noted.

Parameter

Conditions

Min

Typ

Max

Units

Current Accuracy

(4)

101

106

Matching

(5)

3.6

Drop-out

Where ILED = 90% of LED current seen at

VDROPNOM = 1.2V, 100% brightness level

190

320

Ground/Supply Bias Current

3.2

4.2

Shutdown Current

VEN = 0V

0.01

µA

PWM Dimming

Logic Low

0.2

Enable Input Voltage (VEN)

Logic High

1.2

Enable Input Current

VIH > 1.2V

0.01

µA

Current Source Delay

(50% levels)

Shutdown to on

Standby to on

On to Standby

0.3

µs

Current Source Transient Time

(10%-90%)

TRISE

TFALL

0.3

µs

Stand-by to Shutdown Time

VEN = 0V

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. As determined by average current of all channels in use and all channels loaded.

5. The current through each LED meets the stated limits from the average current of all LEDs.

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