MIC2193 Datasheet, PDF (2/10 Pages) Micrel Semiconductor – 400KHZ SO 8 SYNCHRONOUS BUCK CONTROL IC

MIC2193
Ordering Information
Part Number
MIC2193BM
MIC2193YM
Voltage
Adjustable
Adjustable
Frequency
400KHz
400KHz
Temperature Range
–40°C to +125°C
–40°C to +125°C
Package
8-lead SOP
8-lead SOP
Lead Finish
Standard
Pb-Free
Micrel
Pin Configuration
VIN 1
COMP 2
FB 3
CS 4
8 OUTP
7 OUTN
6 GND
5 VDD
8 Lead SOIC (M)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
VIN
COMP
FB
CS
VDD
GND
OUTN
OUTP
Pin Function
Controller supply voltage. Also the (+) input to the current sense amp.
Compensation (Output): Internal error amplifier output. Connect to a
capacitor or series RC network to compensate the regulator’s control loop.
Feedback Input: The circuit regulates this pin to 1.245V.
The (–) input to the current limit comparator. A built in offset of 110mV
between VIN and CSL in conjunction with the current sense resistor sets the
current limit threshold level. This is also the (–) input to the current amplifier.
3V internal linear-regulator output. VDD is also the supply voltage bus for the
chip. Bypass to GND with 1µF.
Ground.
High current drive for the synchronous N-channel MOSFET. Voltage swing
is from ground to VIN. On-resistance is typically 6Ω at 5V_IN.
High current drive for the high side P-channel MOSFET. Voltage swing is
from ground to VIN. On-resistance is typically 6Ω at 5V_IN.
M9999-042704
2
April 2004