MCP1726 Feature-Rich, Low Dropout Regulator for High-Performance Microprocessor Applications 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 generalpurpose 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) DFN-8 (3 x 3) or SO-8 Package VIN ON SHDN OFF 1 VIN VOUT 8 2 VIN Adj 7 3 SHDN Cdelay 6 VOUT @ 1000 mA 1 μF Ceramic 4 GND PWRGD 5 POWER GOOD 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 The MCP1726 LDO features output voltage down to 0.8V at 1 amp output current, supporting next-generation highperformance 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. • A 140 microamp maximum ground current for optimum energy efficiency 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. • Fold-back output current limit • A small, 8-pin DFN package for space-constrained applications • Shutdown and/or Reset options • Supported temperature range of -40°C to +125°C. • Low dropout voltage of 150 mV @ 1A typical • Fast response to load and line transients 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 flexibility for the design and reducing customer inventory. Power Management Additional Information Sampling and Purchasing Information • MCP1726 Data Sheet, DS21936 • Microchip Stand-Alone Analog and Interface Solutions Guide, DS21060 • Microchip Product Selector Guide, DS00148 The MCP1726 LDO is available today for sampling and volume production in Pb-free 8-pin DFN and SOIC packages. • For online sampling, go to: www.sample.microchip.com • For online purchasing, go to: www.buy.microchip.com Visit Microchip’s web site for complete details, or contact any Microchip sales representative or authorized Microchip distributor around the world. 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 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 Package Packing SO-8, Tube, DFN-8 (3X3) Tape & Reel Sales Offices ASIA/PACIFIC AMERICAS Atlanta Boston Chicago Dallas Detroit Kokomo Los Angeles San Jose Toronto 770-640-0034 774-760-0087 630-285-0071 972-818-7423 248-538-2250 765-864-8360 949-462-9523 650-215-1444 905-673-0699 Australia China-Beijing China-Chengdu China-Fuzhou China-Hong Kong China-Shanghai China-Shenyang China-Shenzhen China-Shunde China-Qingdao India-Bangalore India-New Delhi Japan-Kanagawa Korea-Seoul Singapore Taiwan-Kaohsiung Taiwan-Taipei Taiwan-Hsinchu EUROPE 61-2-9868-6733 86-10-8528-2100 86-28-8676-6200 86-591-8750-3506 852-2401-1200 86-21-5407-5533 86-24-2334-2829 86-755-8203-2660 86-757-2839-5507 86-532-502-7355 91-80-2229-0061 91-11-5160-8632 81-45-471-6166 82-2-554-7200 65-6334-8870 886-7-536-4818 886-2-2500-6610 886-3-572-9526 Austria-Wels Denmark-Ballerup France-Massy Germany-Ismaning Italy-Milan Netherlands-Drunen England-Berkshire 43-7242-2244-399 45-4420-9895 33-1-69-53-63-20 49-89-627-144-0 39-0331-742611 31-416-690399 44-118-921-5869 3/1/05 www.microchip.com Microchip Technology Inc. • 2355 W. Chandler Blvd. • Chandler, AZ 85224-6199 M I C RO C O N T RO L L E R S • D I G I TA L S I G N A L C O N T RO L L E R S • ANALOG • S E R I A L E E P RO M S 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