MIC27600 Datasheet PDF - MICREL

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MIC27600
MICREL

Part Number MIC27600
Description 36V / 7A Hyper Speed Control Synchronous DC-DC Buck Regulator
Page 27 Pages


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MIC27600
36V, 7A Hyper Speed Control
Synchronous DC-DC Buck Regulator
SuperSwitcher II
General Description
Features
The Micrel MIC27600 is a constant-frequency, synchronous
buck regulator featuring a unique digitally modified adaptive
on-time control architecture. The MIC27600 operates over an
input supply range of 4.5V to 36V and provides a regulated
output of up to 7A of output current. The output voltage is
adjustable down to 0.8V with a guaranteed accuracy of ±1%,
and the device operates at a switching frequency of 300kHz.
Micrel’s Hyper Speed Controlarchitecture allows for ultra-
fast transient response while reducing the output capacitance
and also makes (High VIN)/(Low VOUT) operation possible.
This digitally modified adaptive tON ripple control architecture
combines the advantages of fixed-frequency operation and
fast transient response in a single device.
The MIC27600 offers a full suite of protection features to
ensure protection of the IC during fault conditions. These
include undervoltage lockout to ensure proper operation
under power-sag conditions, internal soft-start to reduce
inrush current, foldback current limit, “hiccup” mode short-
circuit protection and thermal shutdown.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Hyper Speed Controlarchitecture enables
- High Delta V operation (VIN = 36V and VOUT = 0.8V)
- Small output capacitance
4.5V to 36V voltage input
Adjustable output from 0.8V to 5.5V (VHSD 28V)
Adjustable output from 0.8V to 3.6V (VHSD 36V)
±1% FB accuracy
Any CapacitorStable - Zero-ESR to high-ESR
7A output current capability, up to 95% efficiency
300kHz switching frequency
Internal compensation, 6ms Internal soft-start
Foldback current-limit and “hiccup” mode short-circuit
protection
Thermal shutdown
Supports safe startup into a pre-biased load
–40°C to +125°C junction temperature range
28-pin 5mm × 6mm MLF® package
Applications
Distributed power systems
Communications/networking infrastructure
Set-top box, gateways and routers
Printers, scanners, graphic cards and video cards
___________________________________________________________________________________________________________
Typical Application
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Efficiency (VIN = 28V)
vs. Output Current
95
5.0V
90 3.3V
2.5V
85
1.8V
80
1.5V
1.2V
1.0V
75 0.9V
0.8V
70
65
60
0123456789
OUTPUT CURRENT (A)
Hyper Speed Control, SuperSwitcher II and Any Capacitor are trademarks 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
October 2010
M9999-101310

MIC27600 datasheet pdf
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MIC27600 pdf
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Related : Start with MIC2760 Part Numbers by
MIC27600 36V / 7A Hyper Speed Control Synchronous DC-DC Buck Regulator MIC27600
MICREL
MIC27600 pdf

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