MIC2150 Datasheet, PDF (2/27 Pages) Micrel Semiconductor – 2-Phase Dual Output PWM Synchronous Buck Control IC

Micrel, Inc.
Ordering Information
Part Number
Frequency
MIC2150YML
MIC2151YML
500kHz
300kHz
Voltage
Adj.
Adj.
Junction Temp.
Range
–40°C to +125°C
–40°C to +125°C
Lead Finish
Pb-Free
Pb-Free
MIC2150
Package
4mm×4mm 24-pin MLF^®
4mm×4mm 24-pin MLF^®
Pin Configuration
24-Pin MLF^® (ML)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
Pin Name
BS1
HSD1
SW1
CS1
SS1
COMP1
AGND
FB1
AVDD
FB2
PGOOD
COMP2
Pin Function
Boost 1(Input): Provides voltage for high-side MOSFET driver 1. The gate drive
voltage is higher than the source voltage by V_DD minus a diode drop.
High-Side Drive 1 (Output): High current output-driver for ext. high-side
MOSFET.
Switch Node 1(Output): High current output driver return for HSD1.
Current Sense 1 (Input): Current-limit comparator non-inverting input. The
current limit is sensed across the low-side FET during the ON-time. Current limit
is set by the resistor in series with the CS1 pin.
Soft-start, Output 1(Input): Controls the turn-on time of the output voltage. Active
at power-up, Enable and Current Limit recovery.
Compensation 1 (Input): Pin for external compensation, Channel 1.
Analog Ground (Signal): Signal path return for FB, EN, PGOOD, AVDD, SS and
COMP.
Feedback 1 (Input): Input to Channel 1 error amplifier. Regulates to 0.7V.
Analog Supply Voltage (Input): Connect ext. bypass capacitor.
Feedback 2 (Input): Input to Channel 2 error amplifier. Regulates to 0.7V.
Power Good (Output): Indicates Channel 1 output AND Channel 2 output > 90%
Nominal.
Compensation 2 (Input): Pin for external compensation, Channel 2.
August 2009
2
M9999-082809-A
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