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MIC2174-1YMM-TR

Description
Switching Controllers
CategoryPower/power management    The power supply circuit   
File Size621KB,28 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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MIC2174-1YMM-TR Overview

Switching Controllers

MIC2174-1YMM-TR Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMicrochip
package instructionTSSOP,
Reach Compliance Codecompliant
ECCN codeEAR99
Other featuresALSO HAS ADJUSTABLE OUTPUT VOLTAGE DOWN TO 0.8V
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyHYSTERETIC CURRENT MODE
Maximum input voltage5.5 V
Minimum input voltage3 V
JESD-30 codeS-PDSO-G10
JESD-609 codee4
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals10
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.1 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency375 kHz
Temperature levelAUTOMOTIVE
Terminal surfaceNICKEL PALLADIUM GOLD
Terminal formGULL WING
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width3 mm
MIC2174/MIC2174C
Synchronous Buck Controller
Featuring Adaptive On-Time Control
40V Input, 300kHz
Hyper Speed Control™ Family
General Description
The Micrel MIC2174/MIC2174C is a fixed-frequency,
synchronous buck controller featuring adaptive on-time
control. The MIC2174/MIC2174C operates over an input
supply range of 3V to 40V at a fixed switching frequency of
300kHz and is capable of driving 25A of output current.
The output voltage is adjustable down to 0.8V.
A unique Hyper Speed Control™ architecture allows for
ultra-fast transient response while reducing the output
capacitance. It also makes ultra-fast transient response
while reducing the output capacitance and also allows for
extremely low duty-cycle operation. The MIC2174 /
MIC2174C utilizes an adaptive T
ON
ripple controlled
architecture. A UVLO is provided to ensure proper
operation under power-sag conditions to prevent the
external power MOSFET from overheating. A soft-start is
provided to reduce inrush current. Foldback current limit
and “hiccup” mode short-circuit protection ensure FET and
load protection.
The MIC2174/MIC2174C is available in a 10-pin MSOP
(MAX1954A-compatible) package with an operating
junction temperature range from –40°C to +125°C.
All support documentation can be found on Micrel’s web
site at:
www.micrel.com.
Features
Hyper Speed Control™ architecture enables:
– High delta V operation (V
HSD
= 40V and V
OUT
= 0.8V)
– Smaller output capacitors than competitors
3V to 40V input voltage
Any Capacitor
TM
stable
-
Zero ESR to high ESR
300kHz switching frequency
Adjustable output from 0.8V to 5.5V (V
HSD
28V)
Adjustable output from 0.8V to 3.6V (V
HSD
> 28V)
±1% FB accuracy (MIC2174)
±3% FB accuracy (MIC2174C)
Up to 94% efficiency
Foldback current limit and “hiccup” mode short-circuit
protection
Thermal shutdown
Safe start-up into pre-biased loads
–40°C to +125°C junction temperature range
Applications
Telecom Networking
Industrial Equipment
Distributed DC power systems
____________________________________________________________________________________________________________
Typical Application
12V to 3.3V Efficiency
100
95
90
EFFICIENCY (%)
85
80
75
70
65
60
55
50
0
2
4
6
8
10
VIN=5V
Synchronous Buck Controller Featuring Adaptive On-Time Control
OUTPUT CURRENT (A)
Hyper Speed Control and Any Capacitor are trademarks of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
September 2010
M9999-091310-C
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