MIC33163 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
MIC33163YGJ
ADJ
No
–40°C to +125°C
MIC33164YGJ
ADJ
Yes
–40°C to +125°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
MIC33163/4
Package^{(1, 2)}
20-Pin 2.5mm × 3mm QFN
20-Pin 2.5mm × 3mm QFN
2.5mm × 3mm QFN (GJ)
Adjustable Output Voltage
(Top View)
Pin Description
Pin Number
1, 20
2, 8, 9
3, 4, 5, 6, 7
10,11,12,13
14
15
16
17
18
19
Pin Name
PVIN
PGND
SW
VOUT
AGND
AVIN
SS
PG
FB
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 180Ω (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 VOUT to AGND 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 22, 2014
2
Revision 1.1