MIC23450 Datasheet, PDF (2/22 Pages) Micrel Semiconductor – 3MHz, PWM, 2A Triple Buck Regulator with HyperLight Load® and Power Good

Micrel, Inc.
MIC23450
Ordering Information
Part Number
Marking
Nominal Output
Voltage
Junction Temperature
Range⁽¹⁾
Package^{(2, 3)}
MIC23450-AAAYML
AAA
ADJ/ADJ/ADJ
–40C to +125°C
32-Pin 5mm × 5mm MLF
Notes:
1. Other options available. Contact Micrel for details.
2. MLF is a Green, RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
3. MLF • = Pin 1 identifier.
Lead Finish
Pb-Free
Pin Configuration
32-Pin 5mm × 5mm MLF (ML) − Adjustable
Top View
Pin Description
Pin Number
26, 23, 21
30, 3, 8
31, 4, 9
32, 5, 10
1, 6, 12
2, 7, 11
27, 29, 14
28, 15, 13
24, 22, 18
16, 17, 19, 20, 25
ePAD
Pin Name
SW1, 2, 3
EN1, 2, 3
SNS1, 2, 3
FB1, 2, 3
PG1, 2, 3
AGND1, 2, 3
PVIN1, 2, 3
AVIN1, 2, 3
PGND1, 2, 3
NC
ePad
Pin Function
Switch (Output). Internal power MOSFET output switches for Output 1/2/3.
Enable (Input). Logic high enables operation of regulator 1/2/3. Logic low will shut down the
device. Do not leave floating.
Sense. Connect to VOUT1,2,3 as close to output capacitor as possible to sense output voltage.
Feedback. Connect a resistor Divider from output 1/2/3 to ground to set the output voltage.
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.
Analog Ground. Connect to quiet ground point away from high-current paths, e.g., COUT for
best operation. Must be connected externally to PGND.
Power Input Voltage. Connect a capacitor to PGND to localize loop currents and decouple
switching noise.
Analog Input Voltage. Connect a capacitor to AGND to decouple noise.
Power Ground.
No Connect.
Connect to ground plane to ensure good thermal properties.
December 2012
2
M9999-120712-A