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MIC22705YML-TR

Description
Conv DC-DC 2.9V to 5.5V Synchronous Step Down Single-Out 0.7V 7A 24-Pin QFN EP T/R
File Size2MB,29 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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MIC22705YML-TR Overview

Conv DC-DC 2.9V to 5.5V Synchronous Step Down Single-Out 0.7V 7A 24-Pin QFN EP T/R

MIC22705YML-TR Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeSynchronous Step Down
Output TypeAdjustable
Switching Frequency (kHz)800 to 1200
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)0.7(Min)
Maximum Output Current (A)7
Minimum Input Voltage (V)2.9
Maximum Input Voltage (V)5.5
Operating Supply Voltage (V)2.9 to 5.5
Typical Quiescent Current (uA)850
Line Regulation0.2%(Typ)
Load Regulation0.2%(Typ)
Efficiency (%)95(Min)
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
PackagingTape and Reel
Supplier PackageQFN EP
Pin Count24
Standard Package NameQFN
MountingSurface Mount
Package Height0.83
Package Length4
Package Width4
PCB changed24
Lead ShapeNo Lead
MIC22705
1MHz, 7A Integrated Switch High-Efficiency
Synchronous Buck Regulator
General Description
The Micrel MIC22705 is a high-efficiency, 7A integrated
switch synchronous buck (step-down) regulator. The
MIC22705 is optimized for highest efficiency, achieving
more than 95% efficiency while still switching at 1MHz.
The ultra-high speed control loop keeps the output voltage
within regulation even under the extreme transient load
swings commonly found in FPGAs and low-voltage ASICs.
The output voltage is pre-bias safe and can be adjusted
down to 0.7V to address all low-voltage power needs.
The MIC22705 offers a full range of sequencing and
tracking options. The Enable/Delay (EN/DLY) pin,
combined with the Power Good (PG) pin, allows multiple
outputs to be sequenced in any way during turn-on and
turn-off. The Ramp Control™ (RC) pin allows the device to
be connected to another product in the MIC22xxx and/or
MIC68xxx family, to keep the output voltages within a
certain ∆V on start-up.
®
The MIC22705 is available in a 24-pin 4mm x 4mm MLF
with a junction operating range from –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
Input voltage range: 2.9V to 5.5V
Output voltage adjustable down to 0.7V
Output load current up to 7A
Safe start-up into a pre-biased output load
Full sequencing and tracking capability
Power Good output
Efficiency >95% across a broad load range
Ultra-fast transient response
Easy RC compensation
100% maximum duty cycle
Fully-integrated MOSFET switches
Thermal-shutdown and current-limit protection
24-pin 4mm x 4mm MLF
®
–40°C to +125°C junction temperature range
Applications
High power density point-of-load conversion
Servers, routers, and base stations
DVD recorders / Blu-ray players
Computing peripherals
FPGAs, DSP and low-voltage ASIC power
_________________________________________________________________________________________________________________________
Typical Application
Efficiency (V
IN
= 5.0V)
vs. Output Current
100
95
90
3.3V
EFFICIENCY (%)
85
80
75
70
65
V
IN
= 5.0V
60
55
50
0
1
2
3
4
5
2.5V
6
7
MIC22705 7A 1MHz Synchronous Output Converter
OUTPUT CURRENT (A)
Ramp Control is a trademark of Micrel, Inc
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology, 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
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