MIC24085 Datasheet, PDF (2/16 Pages) Micrel Semiconductor – Integrated FET Buck Regulator

Micrel, Inc.
Ordering Information
Part Number
MIC24085AYML
MIC24085BYML
MIC24085CYML
MIC24085DYML
MIC24085EYML
MIC24085FYML
Output Voltage
ADJ
1.5V
1.8V
2.5V
3.3V
5V
Pin Configuration
Junction Temperature Range
–40°C to +125°C
Package
MIC24085
Lead Finish
16-Pin 3mm x 3mm QFN
Pb-Free
16-Pin 3mm × 3mm QFN (ML)
(Top View)
Pin Description
Pin Number
1, 12, 13, 16
Pin Name
SW
2, 3, 11
VCC
4
GND
5
FB
6, 7
NC
8
PG
9
EN
10
14,15
EP
BST
PGND
ePAD
Pin Function
Switch Node (Output): Power stage output. Connect an inductor to this pin.
Supply Voltage (for control circuit and power stage): A ceramic input capacitor between VCC and
the power ground (PGND) is required.
Analog Ground: GND is the ground path of the control circuitry.
Feedback (Input): Input to the error amplifier of the PWM controller. The FB pin is regulated to
0.9V. A resistor divider connecting the feedback to the output is used to adjust the desired output
voltage.
No connection.
Power Good (Output): Open drain output, which needs a pull-up. The PG pin turns logic high when
the converter output voltage is regulated in the range from 93% to 103% of the setting.
Enable (Input): An accurate Enable with hysteresis is provided. High = enable, Low = shutdown.
Enable has an internal pull-up to ensure a stable state if this pin is not connected.
Boost (Output): Bootstrapped voltage to the high-side N-channel MOSFET. A boost capacitor of
0.1μF is connected between the BST pin and the SW pin.
Power Ground: PGND is the ground path for the power stage.
Exposed Pad. It must be connected to PGND on the PCB.
October 22, 2013
2
Revision 1.1