MCP1703-5002E/DB Microchip Integrated Circuit (SOT223 (3-Pin)) In Stock
Microchip MCP1703-5002E/DB is a 250 mA low-dropout linear regulator with 5 V fixed output, 0.33 V typical dropout voltage, and 4 V to 16 V input range in a SOT-223-3 package. From $0.60 in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT223 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- MCP1703-5002E/DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5900(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1703-5002E/DB?
- 250 mA output current with only 330 mV typical dropout voltage supports efficient 5 V regulation from 6 V to 16 V input supplies
- Wide 4 V to 16 V input range accommodates unregulated wall adapters, lead-acid batteries, and 12 V automotive rails
- SOT-223-3 package with exposed thermal pad enables effective heat dissipation without additional heatsinking up to 250 mA
What is MCP1703-5002E/DB used for?
The MCP1703-5002E/DB is well suited for regulating 5 V logic power from 12 V industrial supplies, 9 V wall adapters, and automotive accessory ports in embedded control boards and sensor hubs. Its wide input range makes it compatible with unregulated power supplies where input voltage can vary from 6 V to 16 V across load and AC line variations. The SOT-223 package with thermal pad also facilitates higher-power operation in motor driver auxiliary supplies, relay driver boards, and 5 V USB output power banks.
What are the specifications of MCP1703-5002E/DB?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-223-3 |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 7Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.65V |
| Dropout Voltage1-Nom | 0.33V |
| Input Voltage Absolute-Max | 18V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 5.65V |
| JESD-30 Code | R-PDSO-G4 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.15525% |
| Load Regulation-Max | 0.125% |
| 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 | 5.1V |
| Output Voltage1-Min | 4.9V |
| Output Voltage1-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG |
| Packing Method | TUBE |
| 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 | 2.3mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2% |
| Package | SOT223 (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 |
Where can I find the MCP1703-5002E/DB datasheet?
MCP1703-5002E/DB Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1703-5002E/DB?
Compatible alternatives and drop-in replacements for MCP1703-5002E/DB:
Regulator, 5V, 0.65V Dropout, CMOS, PDSO4
Frequently Asked Questions
What is the maximum input voltage and dropout voltage for MCP1703-5002E/DB operating at full 250 mA load?
The MCP1703-5002E/DB accepts a maximum input voltage of 16 V (absolute maximum 18 V) and exhibits a maximum dropout voltage of 650 mV at the full 250 mA rated output current. This means the device maintains a regulated 5 V output as long as the input remains above 5.65 V, making it suitable for deeply discharged 6 V lead-acid battery systems where input can droop to 5.8 V.
How does the MCP1703-5002E/DB SOT-223 package handle heat dissipation compared to a SOT-23-5 LDO at 250 mA?
The SOT-223-3 package has a thermal resistance of approximately 50°C/W junction-to-ambient with a PCB pad, compared to roughly 250°C/W for a SOT-23-5. At 250 mA with 7 V input and 5 V output, the power dissipation is 500 mW. In SOT-223, junction temperature rises about 25°C above ambient, remaining safely below 125°C at 100°C ambient. A SOT-23-5 package under the same conditions would reach 250°C above ambient — far exceeding safe operating limits.
For a 12 V automotive accessory port powering a 5 V microcontroller board, how stable is the MCP1703-5002E/DB output across temperature?
The MCP1703-5002E/DB output voltage is specified at 4.900 V to 5.100 V across the full operating temperature range of -40°C to 125°C, representing a worst-case variation of ±100 mV. This ±2% tolerance is sufficient to power a 5 V tolerant MCU or USB peripheral without additional regulation. The device also includes overcurrent protection that limits output current to a safe level if the 5 V rail is shorted during automotive inrush events.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 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.
More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8400 | $0.84 |
| 7+ | $0.8130 | $5.69 |
| 14+ | $0.8100 | $11.34 |
| 25+ | $0.6924 | $17.31 |
| 63+ | $0.6300 | $39.69 |
| 1000+ | $0.5900 | $590.00 |
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.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit