on November 12th 51

A Guide to MCP1702 250mA LDO Regulator

The MCP1702 low-dropout regulator is a versatile solution tailored for efficient power management in low-power applications. With the capability to provide up to 250 mA of output current while drawing an ultra-low quiescent current of just 2.0 µA, the MCP1702 is ideal for extending battery life in portable devices. This article explores its technical specifications, seamless circuit integration, and pin configuration, with a particular focus on the 3.3V variant that enhances efficiency and reliability. Dig into the MCP1702's unique features, practical applications, and insights on optimizing its performance in your electronic projects.

Catalog

MCP1702 Voltage Regulator Overview

The MCP1702 series stands out with its advanced design, offering CMOS low dropout (LDO) voltage regulators. These regulators capably handle up to 250 mA of current, all while maintaining a remarkably low quiescent current of merely 2.0 µA. Its operational prowess covers a broad input range, from 2.7V to 13.2V, making it immensely adaptable for applications powered by two to six-cell batteries. This includes compatibility with 9V alkaline and one or two-cell Li-Ion batteries, showcasing significant flexibility for various power setups.

The regulator’s efficiency in minimizing energy wastage plays a major role in prolonging battery life in portable gadgets. Its extensive input range offers adaptability that facilitates integration across multiple electronic systems, reducing the need for frequent design modifications. You can encounter the MCP1702 often revealing its reliability and robust performance. These attributes endure even when faced with diverse environmental conditions, earning commendation for their effectiveness in different settings.

Pin Layout

Pin No.	Pin Name	Description
1	GND	Ground Pin
2	Vin	Regulated Voltage Input
3	Vout	Regulated Voltage Output

CAD Model

Symbol

Footprint

Functional Diagram

Technical Details

Here's the table for the technical specifications of Microchip Technology MCP1702-3002E/TO .

Type	Parameter
Factory Lead Time	10 Weeks
Mount	Through Hole
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Number of Pins	3
Operating Temperature	-40°C ~ 125°C
Packaging	Bulk
Published	2006
JESD-609 Code	e3
Pbfree Code	Yes
Part Status	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Number of Terminations	3
Terminal Finish	Matte Tin (Sn) - annealed
Terminal Position	SINGLE
Base Part Number	MCP1702
Number of Outputs	1
Voltage - Input (Max)	13.2V
Output Voltage	3V
Output Type	Fixed
Max Output Current	250mA
Output Configuration	Positive
Power Dissipation	644mW
Quiescent Current	5μA
Accuracy	2%
Output Voltage 1	3V
Number of Regulators	1
Min Input Voltage	2.7V
Protection Features	Over Current, Over Temperature, Short Circuit
Voltage Dropout (Max)	0.975V @ 250mA
PSRR	44dB (100Hz)
Dropout Voltage	625mV
Dropout Voltage1-Nom	0.25V
Min Output Voltage	3V
Voltage Tolerance-Max	3%
Nominal Output Voltage	3V
Input Bias Current	2μA
Output Voltage Accuracy	2%
Height	4.62mm
Length	4.71mm
Width	3.62mm
REACH SVHC	No SVHC
Radiation Hardening	No
RoHS Status	ROHS3 Compliant
Lead Free	Lead Free

Features

Feature	Description
Quiescent Current	2.0 µA (typical)
Input Operating Voltage Range	2.7V to 13.2V
Output Current (≥ 2.5V)	250 mA
Output Current (< 2.5V)	200 mA
Low Dropout (LDO) Voltage	625 mV typical @ 250 mA (VOUT = 2.8V)
Output Voltage Tolerance	0.4% (typical)
Standard Output Voltage Options	1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, 5.0V
Output Voltage Range	1.2V to 5.5V in 0.1V increments (50 mV increments available upon request)
Capacitor Stability	Stable with 1.0 µF to 22 µF Output Capacitor
Protection Features	Short-circuit protection and over-temperature protection

Equivalent Devices

• MCP1703

• MCP1825

• LM317

Alternatives

• AMS1117

• MIC5225

• MIC5205

Applications

The MCP1702 finds its place in a diverse array of electronic applications, showcasing its adaptability. A major aspect is its voltage regulation capability, supporting devices with efficient energy management. This feature resonates well with battery-driven gadgets, alarms, detectors, communication devices, and microcontroller circuits.

Battery-Operated Gadgets

In the diverse world of battery-powered devices, the MCP1702 effectively extends battery life through its low dropout voltage. This advantage manifests in remote controls, handheld game consoles, and wireless mice, enabling prolonged and efficient functioning even when batteries begin to deplete. A welcome consequence for you is the noticeably extended time between recharges, bringing satisfaction and convenience into everyday use.

Alarms and Detectors

Alarms and detectors thrive on reliability, where the MCP1702 plays a basic role by delivering consistent power levels in security systems and smoke detectors. This component helps ensure continuous operation, providing you with a sense of security and reducing anxiety associated with false alarms. Field testing often emphasizes improvements in response accuracy to actual alerts, thanks to the stabilized power supply.

Communication Devices

In the fast-paced evolution of communication technology, the MCP1702 stands as an active player by supporting stable energy delivery to smartphones, tablets, and portable radios. This steadiness enhances connectivity and device longevity, treasured by consumers who rely heavily on these devices for uninterrupted personal and professional communication.

Microcontroller Circuits

At the core of myriad inventive devices, microcontroller circuits depend on the MCP1702 for optimized operation. Its attribute of low quiescent current diminishes energy waste, paving the way for environmentally friendly designs. You can incorporate this regulator to frequently report improved performance and reliability across projects—from DIY kits to elaborate industrial machinery.

Solar-Powered and Energy-Efficient Devices

Highlighting its affinity for solar-powered and energy-efficient equipment, the MCP1702's low quiescent current makes it ideal for use in solar panels found in calculators, garden lights, and off-grid systems. Actual evaluations reveal substantial enhancements in energy retention and utilization, reflecting a global shift towards sustainable and eco-conscious technologies.

Circuit Diagram

Incorporating the MCP1702 within voltage regulation circuits provides an efficient pathway for stabilizing power in battery-operated devices. To fully exploit its capabilities, diving into the distinctions of its setup and practical applications can offer substantial rewards.

Establishing the basic circuit involves connecting VIN to power and GND to ground, which forms the primary framework. The stabilized output, derived from VOUT, caters to a variety of electronic components. A common recommendation is the use of a 1µF ceramic capacitor to stabilize the output. However, adjustments may be required to meet specific design conditions, such as adapting to environmental influences or meeting transient response demands, enhancing the tailored performance of the circuit.

Examining the overall system architecture where MCP1702 is deployed can provide further insights into maintaining a steady power supply. Take portable electronic devices as an example: they often spotlight efficiency, thus making thermal management significantly influential. Strategies may encompass strategic positioning to boost airflow or incorporating heat sinks or thermal pads in scenarios with high power demand. These tactics can improve reliability while maintaining design simplicity.

Components with Comparable Specifications

Part Number	MCP1702-3002E/TO	MCP1702-1802E/TO	MCP1702-2502E/TO	MCP1702-2802E/TO
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Package / Case	TO-226-3, TO-92-3 (TO-22)	TO-226-3, TO-92-3 (TO-22)	TO-226-3, TO-92-3 (TO-22)	TO-226-3, TO-92-3 (TO-22)
Number of Pins	3	3	3	3
Number of Outputs	1	1	1	1
Max Output Current	250 mA	250 mA	250 mA	250 mA
Min Input Voltage	2.7 V	2.7 V	2.7 V	2.7 V
Voltage - Input (Max)	13.2 V	13.2 V	13.2 V	13.2 V
Min Output Voltage	1.8 V	1.8 V	2.5 V	2.5 V
Nominal Output Voltage	3 V	1.8 V	2.5 V	2.8 V
Output Voltage	3 V	1.8 V	1.8 V	2.8 V
Accuracy	2%	2%	2%	2%

Dimensions

Manufacturer

Microchip Technology Inc., located strategically in Chandler, Arizona, shines in the world of microcontroller and analog semiconductor solutions. The company dedicates itself to a steadfast journey towards innovation and reliability, evident in the technology it creates. It relies significantly on global support, which provides a robust infrastructure that enables international collaboration and widens access. Innovation defines the soul of Microchip Technology, pushing the boundaries of microcontroller development. The company invests consistently in research and development, leveraging emerging technologies to craft solutions that resonate with both current needs and anticipated future trends. This ability to foresee and adapt is invaluable in a landscape where the pace of technological change is both vibrant and unyielding.

Datasheet PDF

MCP1702-1802E/TO Datasheets:

MCP1702.pdf

MCP1702-2502E/TO Datasheets:

Cylindrical Battery Holders.pdf