MIC4950 Datasheet, PDF (2/18 Pages) Micrel Semiconductor – Hyper Speed Control 5A Buck Regulator

Micrel, Inc.
Ordering Information
Part Number⁽¹⁾
Top Mark
Temperature Range
Package
MIC4950YFM
MIC4950YFL
4950YFM
MIC4950
–40°C ≤ TJ ≤ +125°C
–40°C ≤ TJ ≤ +125°C
8-pin SOIC
10-pin 3mm x 4mm DFN⁽²⁾
Note:
1. Other options are available. Contact Micrel for details.
2. DFN is GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
MIC4950
Lead Finish
Pb-Free
Pb-Free
8-Pin SOIC (FM)
(Top View)
3mm x 4mm DFN (FL)
(Top View)
Pin Description
Pin Number
SOIC-8 (YFM)
1
2
Pin Number
DFN-10 (YFL)
1, 2, EP
3, 8
3
4
4
5
5
6
6
7
7
9
8
10
Pin Name
PGND
PVIN
AVIN
AGND
FB
PG
EN
SW
Pin Function
Power Ground.
Power Input Voltage: Connect a 10µF ceramic capacitor between PVIN and
PGND for input decoupling. Pins 3 and 8 are internally connected in the
DFN-10 package.
Analog Input Voltage: Connect a 1µF ceramic capacitor between AVIN and
AGND to decouple the noise from the internal reference and error comparator.
Analog Ground Input: Connect to a quiet ground plane for best operation. Do
not route power switching currents on the AGND net. Connect AGND and
PGND nets together at a single point.
Feedback (Input): Connect an external divider between VOUT and AGND
(Analog Ground) to program the output voltage.
Power Good (Output): Open-drain output. A pull-up resistor from this pin to a
voltage source is required to detect an output power-is-good condition.
Enable (Input): Logic high enables operation of the regulator. Logic low shuts
down the device. Do not leave floating.
Switch (Output): Internal power MOSFET output switches.
March 20, 2014
2
Revision 1.1