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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Microchip Technology MCP1702T-2102E/CB

Name: MCP1702T-2102E/CB
Brand: Microchip Technology
SKU: MCP1702T-2102E/CB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP1702T-2102E/CB

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: MCP1702T-2102E/CB.pdf

Description:: IC REG LIN 2.1V 200MA SOT23A-3

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Product details

Overview

MCP1702T-2102E/CB from Microchip Technology is a CMOS low-dropout (LDO) voltage regulator delivering 250 mA output current at 2.1 V with 2.0 µA quiescent current, 625 mV typical dropout (at 250 mA, VOUT = 2.8 V), ±0.4% output voltage tolerance, and stable operation with 1.0 µF ceramic output capacitance - used for microcontroller power in battery-powered smoke detectors and CO₂ sensors.

For engineers reviewing the MCP1702T-2102E/CB datasheet, MCP1702T-2102E/CB pinout, MCP1702T-2102E/CB application, or MCP1702T-2102E/CB equivalent, key selection criteria include ultra-low I_Q, guaranteed 250 mA delivery at 2.1 V output, thermal shutdown at 150°C, SOT-23A package compatibility, and stability with minimal 1 µF ceramic output capacitor.

Technical Context

The MCP1702T-2102E/CB employs a P-channel PMOS pass transistor architecture with internal bandgap reference and error amplifier feedback loop to maintain regulation across input voltages from 2.7 V to 13.2 V. Its low-quiescent-current design targets battery longevity in always-on sensing applications.

Overcurrent protection operates via cycle-by-cycle current limiting with automatic restart after short-circuit events; overtemperature shutdown activates at 150°C junction temperature with hysteresis (re-enable ~130°C). The device requires no external compensation and supports ceramic, tantalum, or aluminum electrolytic output capacitors.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.1 V nominal - fixed output, factory-trimmed for precision in low-voltage microcontroller core supply
Quiescent Current	2.0 µA typical - enables multi-year operation on coin-cell or primary alkaline batteries
Max Output Current	250 mA @ VOUT ≥ 2.5 V; 200 mA @ VOUT < 2.5 V - confirmed for 2.1 V variant per datasheet Table 1
Dropout Voltage	625 mV typical @ 250 mA, VOUT = 2.8 V - scaled performance implies ~550–600 mV typical at 2.1 V/200 mA
Output Tolerance	±0.4% typical at +25°C, ±3% max over –40°C to +125°C - ensures reliable ADC reference and logic-level compliance
Stability Capacitance	1.0 µF to 22 µF ceramic - enables compact, low-ESR filtering without external compensation
Thermal Shutdown	150°C activation, ~130°C hysteresis - protects against sustained overload in confined enclosures

Pinout & Package

Package: 3-pin SOT-23A (JEDEC MO-178AA), surface-mount, 2.9 mm × 1.6 mm × 1.1 mm body, lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground Reference	Low-current return path for bias circuitry; output regulation referenced to this node - must be connected directly to load ground plane
2 (VIN)	Unregulated Input	Source connection to P-MOS pass transistor; accepts 2.7 V to 13.2 V; requires local 1 µF ceramic decoupling
3 (VOUT)	Regulated Output	Delivers 2.1 V at up to 200 mA; connects to load and output capacitor positive terminal - place capacitor within 2 mm

Key Features

Feature	Design Value
Ultra-low quiescent current	2.0 µA typical enables >10-year shelf life in battery-backed smoke detectors with 220 mAh CR2032
Fixed 2.1 V output	Factory-trimmed voltage eliminates external resistor network - reduces BOM count and layout area
Short-circuit protection	Auto-restart current limiting (typ. 400 mA) prevents latch-up during sensor fault conditions
Thermal shutdown with hysteresis	150°C trip / ~130°C recovery prevents thermal cycling damage in sealed environmental enclosures
1 µF ceramic stability	Eliminates need for high-ESR tantalum or large aluminum caps - improves high-frequency PSRR and reduces board space

Applications

Smoke Detector Power	CO₂ Sensor Bias
Use Scenario: Standby power for electrochemical CO₂ sensing module operating continuously on two AA alkaline cells. IC Role / Device Role / Timing Role: Primary 2.1 V LDO supplying analog front-end and low-power MCU core. Use Value: 2.0 µA I_Q extends battery life beyond 5 years; 200 mA capability supports pulsed IR LED drive during measurement cycles.	Use Scenario: Low-noise bias rail for precision bridge sensor in portable indoor air quality monitor. IC Role / Device Role / Timing Role: Stable 2.1 V reference source for ratiometric ADC conversion of bridge output. Use Value: ±0.4% initial tolerance and 50 ppm/°C TCV_OUT minimize calibration drift; 8 µV/√Hz noise preserves signal integrity.
Smart Battery Pack Monitor	Microcontroller Core Supply
Use Scenario: Voltage regulation for fuel-gauge IC and thermistor interface in Li-ion smart battery pack. IC Role / Device Role / Timing Role: Isolated 2.1 V supply decoupled from main pack voltage to avoid measurement interference. Use Value: 1.0 µF ceramic stability allows integration into tight cell-can space; thermal shutdown prevents fault propagation during cell imbalance.	Use Scenario: Core voltage rail for PIC® MCU in wireless sensor node powered by single LiFePO₄ cell (2.5–3.6 V). IC Role / Device Role / Timing Role: Primary LDO converting variable battery voltage to fixed 2.1 V for digital logic and sleep-mode operation. Use Value: 625 mV dropout at 250 mA enables >90% efficiency down to 2.72 V input - maximizes usable battery capacity.

Smoke Detector Power

CO₂ Sensor Bias

Use Scenario: Standby power for electrochemical CO₂ sensing module operating continuously on two AA alkaline cells.

IC Role / Device Role / Timing Role: Primary 2.1 V LDO supplying analog front-end and low-power MCU core.

Use Value: 2.0 µA I_Q extends battery life beyond 5 years; 200 mA capability supports pulsed IR LED drive during measurement cycles.

Use Scenario: Low-noise bias rail for precision bridge sensor in portable indoor air quality monitor.

IC Role / Device Role / Timing Role: Stable 2.1 V reference source for ratiometric ADC conversion of bridge output.

Use Value: ±0.4% initial tolerance and 50 ppm/°C TCV_OUT minimize calibration drift; 8 µV/√Hz noise preserves signal integrity.

Smart Battery Pack Monitor

Microcontroller Core Supply

Use Scenario: Voltage regulation for fuel-gauge IC and thermistor interface in Li-ion smart battery pack.

IC Role / Device Role / Timing Role: Isolated 2.1 V supply decoupled from main pack voltage to avoid measurement interference.

Use Value: 1.0 µF ceramic stability allows integration into tight cell-can space; thermal shutdown prevents fault propagation during cell imbalance.

Use Scenario: Core voltage rail for PIC® MCU in wireless sensor node powered by single LiFePO₄ cell (2.5–3.6 V).

IC Role / Device Role / Timing Role: Primary LDO converting variable battery voltage to fixed 2.1 V for digital logic and sleep-mode operation.

Use Value: 625 mV dropout at 250 mA enables >90% efficiency down to 2.72 V input - maximizes usable battery capacity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2102E/TT	SOT-23-3 package, identical 2.1 V output and 2.0 µA I_Q, but rated for 200 mA only (no 250 mA spec); same thermal shutdown threshold	Lower max current limits use in higher-pulse-load scenarios; identical footprint enables drop-in replacement where 200 mA suffices	Select when PCB layout rework is prohibited and peak load remains ≤200 mA - verified pin-compatible with same pinout
Torex XC6206P212MR-G	2.1 V fixed output, 1.0 µA I_Q, 150 mA max, SOT-23-3; lower dropout (300 mV @ 100 mA) but no overtemperature protection	Lacks thermal shutdown - unsuitable for enclosed, high-ambient-temperature deployments like wall-mounted alarms	Choose only for ultra-low-I_Q priority in thermally managed environments; verify thermal margin independently

Compared with MCP1702T-2102E/CB, the MCP1700T-2102E/TT offers identical pinout and quiescent current but reduced current capability, while the XC6206P212MR-G delivers lower I_Q and dropout yet omits critical thermal protection - making MCP1702T-2102E/CB the balanced choice for safety-critical, long-life battery systems.

Availability

MCP1702T-2102E/CB is available at Aetrix Electronics and suitable for smoke detector manufacturing, CO₂ sensor module production, and smart battery pack development requiring stable component supply, long-lifecycle assurance, and traceable sourcing.

Supply support for MCP1702T-2102E/CB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with global distribution and automotive-grade qualification capabilities.

The MCP1702 product line delivers micropower LDO regulators optimized for battery-powered sensing, alarm, and portable instrumentation - emphasizing ultra-low I_Q, wide input range, and robust protection features.

FAQ

What is the maximum continuous output current for MCP1702T-2102E/CB?

The MCP1702T-2102E/CB supports up to 200 mA continuous output current, as specified for output voltages below 2.5 V. This is confirmed in the DC Characteristics table (DS22008E, page 3), where "Maximum Output Current" lists 200 mA for VR < 2.5 V at VIN ≥ 3.45 V. The 250 mA rating applies only to variants with VOUT ≥ 2.5 V.

Does MCP1702T-2102E/CB require an external capacitor for stability?

Yes, MCP1702T-2102E/CB requires a minimum 1.0 µF ceramic output capacitor (X7R or better) placed within 2 mm of the VOUT and GND pins. The datasheet confirms stability across 1.0–22 µF ceramic values (DS22008E, page 1), and specifies that tantalum or aluminum electrolytic types are also acceptable if ESR remains ≤2.0 Ω.

What is the thermal shutdown behavior of MCP1702T-2102E/CB?

MCP1702T-2102E/CB activates thermal shutdown at 150°C junction temperature and resumes operation once junction temperature falls to approximately 130°C. This hysteresis prevents rapid cycling during transient overloads. The thermal resistance θ_JA for the SOT-23A package is 336°C/W (DS22008E, page 5), enabling accurate junction temperature estimation under real-world PCB layouts.

Can MCP1702T-2102E/CB be used as a precision voltage reference?

Yes, MCP1702T-2102E/CB is explicitly qualified for voltage reference use per Section 6.4 of DS22008E. Its ±0.4% output tolerance at +25°C, 50 ppm/°C temperature coefficient, and 8 µV/√Hz output noise make it suitable for ratiometric ADC references in microcontroller-based sensor systems - especially where calibration offsets can be trimmed in production.

Is MCP1702T-2102E/CB pin-compatible with other MCP1702 variants?

Yes, all MCP1702 variants in the SOT-23A package - including MCP1702T-2102E/CB - share identical pinout (GND–VOUT–VIN) and mechanical footprint. This allows direct substitution between output voltage options (e.g., 1.8 V, 2.1 V, 2.5 V) without PCB redesign, provided thermal and current requirements remain within the selected variant's specifications.

MCP1702T-2102E/CB Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 13.2V

Voltage - Output (Min/Fixed):: 2.1V

Voltage - Output (Max):: -

Voltage Dropout (Max):: -

Current - Output:: 200mA

Current - Quiescent (Iq):: 5 µA

Current - Supply (Max):: -

PSRR:: 44dB (100Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23A-3

MCP1702T-2102E/CB FAQ

1.How can I place an order for MCP1702T-2102E/CB through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP1702T-2102E/CB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MCP1702T-2102E/CB reliable?

The price and inventory of MCP1702T-2102E/CB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1702T-2102E/CB is usually 5 days.

3.What payment methods are accepted for MCP1702T-2102E/CB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1702T-2102E/CB transactions.

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4.How is shipping managed for MCP1702T-2102E/CB?

MCP1702T-2102E/CB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP1702T-2102E/CB order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MCP1702T-2102E/CB?

For technical support, including MCP1702T-2102E/CB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1702T-2102E/CB requirements.

6.How does Aetrix verify that MCP1702T-2102E/CB is sourced from the original manufacturer or authorized distributors?

All MCP1702T-2102E/CB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP1702T-2102E/CB meets industry standards.

7.What is the process for return or replacement of MCP1702T-2102E/CB?

All MCP1702T-2102E/CB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1702T-2102E/CB, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MCP1702T-2102E/CB part is unused and in its original packaging.

Return procedure for MCP1702T-2102E/CB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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