Micrel, Inc.

MIC23451

November 5, 2013

2

Revision 1.2

Ordering Information

Part Number

Marking

Nominal Output

Voltage

Junction Temperature

Range(1)

Package(2,3)

Lead Finish

MIC23451-AAAYFL

AAA

Adj./Adj./Adj.

–40°C to +125°C

26-Pin 4mm × 4mm QFN

Pb-Free

Notes:

1. Other options are available. Contact Micrel for details.

2. QFN is a Green, RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.

3. QFN • = Pin 1 identifier

Pin Configuration

26-Pin 4mm × 4mm QFN (FL) − Adjustable

(Top View)

Pin Description

Pin Number

Pin Name

Pin Function

26, 4, 7

SW1, 2, 3

Switch (Output). Internal power MOSFET output switches for output 1/2/3.

21, 19, 15

EN1, 2, 3

Enable (Input). Logic high enables operation of regulator 1/2/3. Logic low will shut down the

device. Do not leave floating.

22, 18, 12

SNS1, 2, 3

23, 17, 14

FB1, 2, 3

Feedback. Connect a resistor divider from output 1/2/3 to ground to set the output voltage.

20, 16, 13

PG1, 2, 3

Power Good. Open-drain output for the power good indicator for output 1/2/3. Place a resistor

between this pin and a voltage source to detect a power good condition.

EP1, 24, 11

AGND

for best operation. Must be connected externally to PGND.

25, 5, 8

PVIN1, 2, 3

Power Input Voltage. Connect a capacitor to PGND to localize loop currents and decouple

switching noise.

3, 6, 9

AVIN1, 2, 3

Analog Input Voltage. Connect a capacitor to AGND to decouple noise.

EP2, 10, 2, 1

PGND

Power Ground.