CONTROL IC. MIC2193 Datasheet

MIC2193 IC. Datasheet pdf. Equivalent

Part MIC2193
Description 400KHZ SO-8 SYNCHRONOUS BUCK CONTROL IC
Feature MIC2193 Micrel MIC2193 400kHz SO-8 Synchronous Buck Control IC General Description Micrel’s MIC219.
Manufacture Micrel Semiconductor
Datasheet
Download MIC2193 Datasheet



MIC2193
MIC2193
Micrel
MIC2193
400kHz SO-8 Synchronous Buck Control IC
General Description
Micrel’s MIC2193 is a high efficiency, PWM synchronous
buck control IC housed in the SO-8 package. Its 2.9V to 14V
input voltage range allows it to efficiently step down voltages
in 3.3V, 5V, and 12V systems as well as 1- or 2-cell Li Ion
battery powered applications.
The MIC2193 solution saves valuable board space. The
device is housed in the space-saving SO-8 package, whose
low pin-count minimizes external components. Its 400kHz
PWM operation allows a small inductor and small output
capacitors to be used. The MIC2193 can implement all-
ceramic capacitor solutions.
The MIC2193 drives a high-side P-channel MOSFET, elimi-
nating the need for high-side boot-strap circuitry. This feature
allows the MIC2193 to achieve maximum duty cycles of
100%, which can be useful in low headroom applications. A
low output driver impedance of 4allows the MIC2193 to
drive large external MOSFETs to generate a wide range of
output currents.
The MIC2193 is available in an 8 pin SOIC package with a
junction temperature range of –40°C to +125°C.
Features
2.9V to 14V input voltage range
400kHz oscillator frequency
PWM current mode control
100% maximum duty cycle
Front edge blanking
4output drivers
Cycle-by-cycle current limiting
Frequency foldback short circuit protection
8 lead SOIC package
Applications
Point of load power supplies
Distributed power systems
Wireless Modems
ADSL line cards
Servers
Step down conversion in 3.3V, 5V, and 12V systems
1-and 2-cell Li Ion battery operated equipment
Typical Application
VIN
3.3V
120µF
6.3V
(×2)
1µF
2.2nF
0.012
MIC2193BM
VIN CS
VDD OUTP
2k
COMP OUTN
GND FB
Si9803
(×2)
3.8µH
Si9804 10k
(×2)
22.6k
VOUT
1.8V, 5A
220µF
6.3V
(×2)
Adjustable Output Synchronous Buck Converter
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2004
1 M9999-042704



MIC2193
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 regulators 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 6at 5VIN.
High current drive for the high side P-channel MOSFET. Voltage swing is
from ground to VIN. On-resistance is typically 6at 5VIN.
M9999-042704
2
April 2004





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)