MIC24046-H Datasheet, PDF (2/24 Pages) Micrel Semiconductor – Pin-Programmable, 4.5V − 19V, 5A Step-Down Converter

Micrel, Inc.
Ordering Information
Part Number
MIC24046-HYFL
Junction Temperature Range
–40°C to +125°C
Pin Configuration
Package
20-Pin 3 mm × 3 mm QFN
MIC24046-H
Lead Finish
Pb-Free
20-Pin 3mm × 3mm QFN (FL)
(Top View)
Pin Description
Pin Number
1−2
3 − 4, 13
5−6
7
8
9
10
Pin Name
VIN
PGND
LX
BST
IC
VOSET0
VOSET1
Pin Function
Input Voltage for the Buck Converter Power Stage: These pins are the drain terminal of the internal
high-side N-channel MOSFET. A 10µF minimum ceramic capacitor should be connected from VIN to
PGND as close as possible to the device. A combination of multiple ceramic capacitors of different
sizes is recommended.
Low-Side MOSFET Source Terminal and Low-Side Driver Return: Connect the ceramic input
capacitors to PGND as close as possible to the device.
Switch Node: Drain (low-side MOSFET) and source (high-side MOSFET) connection of the internal
power N-channel FETs. The external inductor (switched side) and bootstrap capacitor (bottom
terminal) must be connected to these pins.
Bootstrap: Supply voltage for the driver of the high-side N-channel power MOSFET. Connect the
bootstrap capacitor (top terminal) to this pin.
Internally Connected for test mode purposes. Connect to AGND or leave floating in normal operation.
Three-state Pin (Low, High, and High-Z) for Output Voltage Programming: Together with VOSET1,
VOSET0 defines nine logic values corresponding to nine output voltage selections.
Three-State Pin (Low, High, and High-Z) for Output Voltage Programming: Together with VOSET0,
VOSET1 defines nine logic values corresponding to nine output voltage selections.
July 7, 2015
2
Revision 1.1