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| MIC2251 Datasheet, PDF (2/13 Pages) Micrel Semiconductor – High-Efficiency Low EMI Boost Regulator | |||
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Micrel, Inc.
MIC2251
Ordering Information
Part Number
MIC2251YML
Marking(1)
ADA(2)
Junction Temp. Range
â40° to +125°C
Package(3)
8-Pin 2mm x 2mm MLF®
Lead Finish
Pb-Free
Note:
1. Pin 1 identifier = ââ¢â.
2. Overbar ( ) may not be to scale.
3. MLF® is GREEN RoHs compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
Pin Description
Pin Number
1
2
3
4
5
6
7
8
EPAD
Pin Name
FB
AGND
PGND
SW
NC
VIN
DITH
EN
GND
Pin Function
Feedback (Input): 1.24V output voltage sense node. VOUT = 1.24V (1 + R1/R2)
Analog Ground. Connect to power ground.
Power Ground.
Switch Node (Input): Internal power NMOS drain.
Not Internally Connected.
Supply (Input): 2.5V to 5.5V input voltage.
Frequency Dithering (Input): Connect this pin high to enable pseudo-random on-
time dithering to reduce EMI. Connect this pin-to-ground to disable this function.
Enable (Input): Logic high enables the regulator. Logic low shuts down the
regulator. Do not leave floating.
Ground (Return): Exposed backside pad. Connect to power ground.
February 2011
2
M9999-021511-A
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