MCP1726
Feature-Rich, Low Dropout Regulator for High-Performance
Microprocessor Applications
DFN-8 (3 x 3) or SO-8 Package
1
3
45
6
7
8
VIN VIN VOUT
VIN Adj
Cdelay
SHDN
GND PWRGD
OFF
ON
SHDN
VOUT
@ 1000 mA
POWER
GOOD
21μF
Ceramic
Microchip continues to expand its portfolio of Low Dropout
Regulators (LDOs) with its new MCP1726 ceramic output
cap stable, low output voltage regulator.
The MCP1726 is the only 1-amp LDO, stable with ceramic
capacitors that incorporates low output voltage, Power
Good and user-programmable Power Good delay on-chip,
providing an ideal solution for a variety of high-performance
system applications.
An Innovative Design
Technology innovation continues to drive microprocessor
development onto smaller geometries, requiring separate
voltages for the core and I/O. The MCP1726 meets
these requirements with high output current and low
core voltage, making it an ideal solution for the growing
number of applications using high-performance general-
purpose embedded processors and next-generation logic
cores. These applications include:
• Computers (PC motherboards, PC add-in cards
and graphics processor cards)
• Consumer (high-end digital set top boxes, high-end
television sets and LCD projection devices)
• Industry/power supplies (SMPS post regulators and
automated control systems)
The MCP1726 LDO features output voltage down to 0.8V
at 1 amp output current, supporting next-generation high-
performance CPUs and logic cores. The output voltage
setting can be adjusted from 0.8V to 5.0V using two
external resistors, or set to a predetermined fixed value
such as 0.8V, 1.2V, 1.8V, 2.5V, 3.3V and 5.0V.
The MCP1726 monitors its output voltage internally and
provides Power Good output when the output is within
92% of regulation. An external capacitor can be used on
the Cdelay pin to adjust the delay from 1 μs to 300 μs. The
typical default delay is 200 μs. Using CMOS construction,
the internal quiescent current of the MCP1726 is typically
less than 140 μA. When the LDO is shut down, the
quiescent current is less than 0.1 μA.
The LDO is stable with a 1 microfarad ceramic output
capacitor, reducing cost and board space. The power
good output with programmable delay option allows
engineers to program a system delay on a wider time
frame, providing additional fl exibility for the design and
reducing customer inventory.
Key Features of the MCP1726
• Up to 1A output load current
• Power Good output with adjustable delay
• Stable with 1.0 μF ceramic output cap
• Over-current and over-temperature protection/thermal
shutdown
• A 140 microamp maximum ground current for optimum
energy effi ciency
• A small, 8-pin DFN package for space-constrained
applications
• Shutdown and/or Reset options
• Fold-back output current limit
• Supported temperature range of -40°C to +125°C.
• Low dropout voltage of 150 mV @ 1A typical
• Fast response to load and line transients
Power Management
MCP1726 Product Specifications
MCP1726
Ceramic-output Cap-stable, Low Output Voltage Regultator Specifications
Product Output
Voltage
Output
Current
VCC
Range
Junction
Temperature
Range
Typical
Supply
Current
Typical
Dropout
Voltage @
Max. IOUT
Typical
Output
Voltage
Accuracy
SHDN Programmable
Power Good Package Packing
MCP1726
0.8V,
1.2V,
1.8V,
2.5V,
3.3V,
5.0V,
ADJ
1000 mA 2.3V to
6.0V
-40°C
to 125°C 140 μA 150 mV ±1% Yes Yes SO-8,
DFN-8 (3X3)
Tube,
Tape & Reel
Additional Information
• MCP1726 Data Sheet, DS21936
• Microchip Stand-Alone Analog and Interface Solutions
Guide, DS21060
• Microchip Product Selector Guide, DS00148
• For online sampling, go to: www.sample.microchip.com
• For online purchasing, go to: www.buy.microchip.com
Sampling and Purchasing Information
The MCP1726 LDO is available today for sampling and
volume production in Pb-free 8-pin DFN and SOIC
packages.
Visit Microchip’s web site for complete details, or contact
any Microchip sales representative or authorized Microchip
distributor around the world.
www.microchip.com
Information subject to change. The Microchip name and logo and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. All other
trademarks mentioned herein are property of their respective companies. © 2005, Microchip Technology Incorporated. All Rights Reserved. Printed in the U.S.A. 3/05
DS21926A
*DS21926A
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