Micrel Inc.

MIC2845/46

January 2008

3

M9999-010808-A

Pin Description

Pin Number

MIC2845

Pin Number

MIC2846

Pin Name

Pin Function

1

1

VIN

2

2

LDO2

Output of LDO2. Connect at least 1µF ceramic output capacitor.

3

3

EN2

Enable Input for LDO2. Active High Input. Logic High = On; Logic Low = Off;

Do not leave floating.

4

-

END

Enable high side current source. This pin can be used as a PWM input for

dimming of WLEDs. Do not leave floating.

-

4

DC

Digital control input for high side current source. See Digital Dimming

Interface. Do not leave floating.

5

5

An internal 1.27V reference sets the nominal maximum WLED current.

to 20mA at 100% duty cycle.

6

6

D1

LED1 current sink input. Connect LED anode to VIN and cathode to this pin.

7

7

D2

LED2 current sink input. Connect LED anode to VIN and cathode to this pin.

8

8

D3

LED3 current sink input. Connect LED anode to VIN and cathode to this pin.

9

9

GND

Ground.

10

10

D4

LED4 current sink input. Connect LED anode to VIN and cathode to this pin.

11

11

D5

LED5 current sink input. Connect LED anode to VIN and cathode to this pin.

12

12

D6

LED6 current sink input. Connect LED anode to VIN and cathode to this pin.

13

13

EN1

Enable Input for LDO1. Active High Input. Logic High = On; Logic Low = Off;

Do not leave floating.

14

14

LDO1

Output of LDO1. Connect a 1µF ceramic output capacitor.