MCP1703T-3002E/CB Microchip Integrated Circuit (SOT23 (3-Pin)) In Stock
Microchip MCP1703T-3002E/CB is a fixed 3.0 V LDO linear regulator supplying 250 mA with ultra-low 2 µA quiescent current, accepting 3.975 V to 16 V input in a 3-pin SOT-23A package. It targets always-on battery-powered IoT and sensor applications requiring minimal standby power drain. Available from stock worldwide.
- Manufacturer
- Microchip
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1703T-3002E/CB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3730(MOQ 25)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low 2 µA quiescent current dramatically extends battery life in always-on IoT sensors and data loggers operating from primary cells
- Wide 3.975 V to 16 V input range accommodates 9 V alkaline batteries, 12 V vehicle supplies, and multi-cell Li-Ion stacks
- 250 mA output current with 625 mV typical dropout at full load suits microcontroller and RF module power rails
- 3-pin SOT-23A package with absolute maximum 18 V input rating provides robust overvoltage tolerance in automotive and industrial environments
Applications
The MCP1703T-3002E/CB is optimised for battery-operated IoT nodes, wireless sensors, and remote monitoring systems where the 2 µA quiescent current allows coin-cell or AA-cell powered designs to remain active for years in sleep-dominated duty cycles. Its wide 3.975 V to 16 V input range makes it compatible with 9 V alkaline, 12 V lead-acid, and multi-cell lithium battery chemistries without redesign. The compact 3-pin SOT-23A footprint suits space-constrained PCBs in industrial sensors, GPS trackers, and building automation nodes.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23A-3 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.975V |
| Dropout Voltage1-Nom | 0.625V |
| Input Voltage Absolute-Max | 18V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 3.975V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.108225% |
| Load Regulation-Max | 0.075% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.25A |
| Output Voltage1-Max | 3.06V |
| Output Voltage1-Min | 2.94V |
| Output Voltage1-Nom | 3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2% |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Taiwan, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What quiescent current does MCP1703T-3002E/CB draw, and how does that translate to battery life in a sleep-mode sensor?
The MCP1703T-3002E/CB draws only 2 µA quiescent current in standby, meaning a 1000 mAh AA cell powering just the LDO and a sleeping microcontroller at 10 µA total could sustain operation for approximately 4 years without recharging. This ultra-low quiescent current is critical for remote IoT sensors, GPS asset trackers, and utility meters where battery replacement is expensive or impractical.
What is the maximum dropout voltage of MCP1703T-3002E/CB at full 250 mA output, and how does that constrain the input supply minimum?
At full 250 mA load the dropout voltage reaches a maximum of 975 mV, requiring the input supply to be at least 3.975 V to maintain the 3.0 V regulated output. For a 3-cell alkaline battery pack nominally at 4.5 V, the regulator maintains regulation until the cells discharge to approximately 4.0 V, providing useful operating margin across the majority of the battery discharge curve.
How does the 16 V maximum input rating of MCP1703T-3002E/CB suit industrial and automotive sensor designs?
The MCP1703T-3002E/CB accepts input voltages up to 16 V (absolute maximum 18 V), making it directly compatible with 12 V automotive battery rails that swing from 9 V during cold cranking to 14.4 V during charging. Industrial sensors powered from 24 V systems require an upstream pre-regulator or resistive dropper, but 12 V industrial sensor panels can use the MCP1703T-3002E/CB as a single-stage 3.0 V supply without additional protection circuitry.
For a 3-pin SOT-23A layout, what external components does the MCP1703T-3002E/CB require to achieve stable 3.0 V regulation?
The device requires only a 1 µF input bypass capacitor and a 1 µF output capacitor to achieve stable 3.0 V regulation across its full 3.975 V to 16 V input range, resulting in a total 3-component BOM including the regulator itself. Using ceramic capacitors of X5R or X7R dielectric rated at 25 V ensures capacitance stability across the operating temperature range and keeps the total solution footprint under 10 mm² on a 2-layer PCB.
Related Guides
How to Choose a 3528 SMD Indicator LED for Blue Status Lighting: Selection Guide
A practical 3528 SMD indicator LED selection guide using 150141BS73100 and related Wurth 150141 variants for blue status lighting.
Jul 5, 2026
BAS70KFILM Design Guide for Low-Leakage Signal Clamping and RF Detector Inputs
Practical BAS70KFILM design guidance for signal clamps, RF detector inputs, leakage control, capacitance, layout, and sourcing alternatives.
Jul 5, 2026
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 4, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $0.6780 | $16.95 |
| 50+ | $0.6450 | $32.25 |
| 100+ | $0.5600 | $56.00 |
| 250+ | $0.4591 | $114.78 |
| 500+ | $0.4017 | $200.85 |
| 1000+ | $0.3730 | $373.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”