MIC2204_05 Datasheet, PDF (2/11 Pages) Micrel Semiconductor – High-Efficiency 2MHz Synchronous Buck Converter

MIC2204
Ordering Information
Part Number
MIC2204BMM
MIC2204YMM
MIC2204BML
MIC2204YML
Voltage
Adjustable
Adjustable
Adjustable
Adjustable
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Micrel, Inc.
Package
10-pin MSOP
10-pin MSOP
10-pin MLF™
10-pin MLF™
Lead Finish
Standard
Lead-Free
Standard
Lead-Free
Pin Configuration
SW 1
VIN 2
SYNC_IN 3
SYNC_OUT 4
EN 5
10 GND
9 GND
8 GND
7 BIAS
6 FB
MSOP-10 (MM)
SW 1
VIN 2
SYNC_IN 3
SYNC_OUT 4
EN ⁵
10 GND
9 GND
8 GND
7 BIAS
6 _FB
MLF-10 (ML)
Pin Description
Pin Number
1
2
3
4
5
6
7
8, 9, 10
M9999-042205
Pin Name
SW
VIN
SYNC_IN
SYNC_OUT
EN
FB
BIAS
GND
Pin Function
Switch (Output): Internal power MOSFET output switches.
Supply Voltage (Input): Requires bypass capacitor to GND.
SYNC_IN for the MIC2204: Sync the main switching frequency to an
external clock. Tie pin to ground if not using this function. Tying SYNC_IN
high reduces the switching frequency to 1.6MHz (See “Applications Informa-
tion” section).
SYNC_OUT an open collector output to feed into SYNC_IN. Float or ground
the SYNC_OUT pin if not using sync out function.
A low level EN will power down the device, reducing the quiescent current to
under 15µA (typ. 6.5µA).
Input to the error amplifier, connect to the external resistor divider network to
set the output voltage.
Internal circuit bias supply, nominally 2.3V. Must be de-coupled to signal
ground with a 0.01µF capacitor.
Ground.
2
April 2005