MCP1726

Feature-Rich, Low Dropout Regulator for High-Performance

Microprocessor Applications

DFN-8 (3 x 3) or SO-8 Package

1

3

4

5

6

7

8

Adj

Cdelay

SHDN

GND PWRGD

OFF

ON

SHDN

@ 1000 mA

POWER

GOOD

2

1 μF

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 flexibility 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 efficiency

• 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