MIC33263 Datasheet, PDF (2/19 Pages) Micrel Semiconductor – Buck Regulator with Integrated Inductor

Micrel, Inc.
Ordering Information
Part Number
Output Voltage Auto Discharge Junction Temperature Range
MIC33263YGK
ADJ
No
–40°C to +85°C
MIC33264YGK
ADJ
Yes
–40°C to +85°C
Note:
1. QFN is a GREEN, RoHS-compliant package. Mold compound is Halogen Free.
2. Pb-free. Lead finish is matte tin.
Pin Configuration
MIC33263/4
Package^{(1, 2)}
20-Pin 2.5mm × 3mm QFN
20-Pin 2.5mm × 3mm QFN
2.5mm × 3mm QFN (GK)
(Top View)
Pin Description
Pin Number
1, 20
2, 8, 9
Pin Name
PVIN
PGND
3, 4, 5, 6, 7
SW
10, 11, 12, 13
VOUT
14
AGND
15
AVIN
16
SS
17
PG
18
FB
19
EN
Pin Function
Power Input Voltage: Connect a capacitor to PGND to decouple the noise.
Power Ground.
Switch (Output): Internal power MOSFET output switches. Disable pull down 180 Ohms
(MIC33164 only).
Inductor Output. Connect a capacitor to PGND to filter the switcher output voltage.
Analog Ground: Connect to central ground point where all high current paths meet (CIN, COUT,
PGND) for best operation.
Analog Input Voltage: Connect a capacitor to ground to decouple the noise.
Soft-Start: Place a capacitor from SS pin to ground to program the soft-start time
Power Good: Open Drain output for the power good indicator. Place a resistor between this pin
and a voltage source to detect a power good condition.
Feedback: Connect a resistor divider from the output to ground to set the output voltage.
Enable (Input): Logic high enables operation of the regulator. Logic low will shut down the device.
Do not leave floating.
May 15, 2014
2
Revision 1.1