TC1262-3.3VAB Microchip Integrated Circuit (Transistor Outline, Vertical) In Stock
TC1262-3.3VAB is a fixed 3.3 V low dropout linear regulator by Microchip housed in a TO-220-3 package, accepting inputs from 4.3 V to 6 V and offering a typical dropout voltage of only 350 mV. It delivers stable 3.3 V regulated output with up to 500 mA output current for powering digital logic and embedded processors. Suited for 5 V to 3.3 V conversion in industrial boards, embedded computers, and power supply modules.
- Manufacturer
- Microchip
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- TC1262-3.3VAB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output voltage for direct digital logic rail supply
- Low dropout voltage of 350 mV typical and 650 mV maximum for efficient 5 V conversion
- Input voltage range from 4.3 V to 6 V absolute maximum 6.5 V
- TO-220-3 through-hole package with optional heatsink mounting for thermal management
- RoHS-compliant lead-free construction for compliance with environmental regulations
- Stable output under varying load conditions for mixed-signal circuit reliability
Applications
TC1262-3.3VAB is used in industrial control boards, single-board computers, and embedded power supply designs that convert an unregulated 5 V bus to a stable 3.3 V logic rail. Its low dropout characteristic and TO-220-3 package make it ideal for medium-current applications up to 500 mA where heatsinking may be added for thermal management in enclosed enclosures.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TO-220-3 |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.65V |
| Dropout Voltage1-Nom | 0.35V |
| Input Voltage Absolute-Max | 6.5V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 4.3V |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.02% |
| Load Regulation-Max | 0.00033% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 3.3825V |
| Output Voltage1-Min | 3.2175V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.1TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TUBE |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Screening Level | TS 16949 |
| Surface Mount | NO |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 2.5% |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range required to maintain regulated 3.3 V output from TC1262-3.3VAB?
TC1262-3.3VAB requires an input voltage between 4.3 V minimum and 6 V maximum (absolute maximum 6.5 V). With a typical dropout of 350 mV, the device maintains a stable 3.3 V output as long as the input stays above approximately 3.65 V, making it suitable for 5 V regulated bus applications with typical line tolerances.
How much power does TC1262-3.3VAB dissipate when supplying 500 mA from a 5 V input?
At 500 mA load with a 5 V input and 3.3 V output, TC1262-3.3VAB dissipates approximately (5 V - 3.3 V) × 0.5 A = 850 mW. This level of dissipation in a TO-220-3 package requires a small heatsink or adequate PCB copper pour to keep junction temperature within the rated limit of +125°C in industrial ambient conditions.
When is TC1262-3.3VAB a better choice than a switching regulator for 5 V to 3.3 V conversion?
TC1262-3.3VAB is preferred when low output noise is critical and the load current stays below 500 mA, such as powering ADC reference circuits, low-noise RF front-ends, or sensitive sensor interfaces. Its linear architecture produces no switching noise, unlike boost or buck converters operating at 100 kHz to 2 MHz that require additional EMI filtering.
What thermal and mechanical options does the TO-220-3 package of TC1262-3.3VAB support for higher-current use?
The TO-220-3 package has a metal tab that can be bolted to an external aluminum heatsink using a standard M3 screw and thermal interface pad, reducing thermal resistance from over 50°C/W (free air) to below 10°C/W with a 25 cm² heatsink. This allows TC1262-3.3VAB to sustain 500 mA continuous current in ambient temperatures up to 85°C without exceeding its thermal limits.
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