TC2185-3.3VCT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
The TC2185-3.3VCT is a 150 mA CMOS low-dropout regulator fixed at 3.3 V in a 5-pin SOT-23 package, featuring only 210 mV dropout voltage, shutdown control, and a -40°C to 125°C operating range for portable and space-constrained power supply designs.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TC2185-3.3VCT Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 150 mA output current with only 210 mV dropout voltage at full load for efficient low-headroom operation
- Fixed 3.3 V output with ±2% accuracy across -40°C to 125°C temperature range ensuring stable regulated rail
- Active-low shutdown pin reduces quiescent current to under 1 µA for battery-life extension in portable devices
Applications
The TC2185-3.3VCT is designed for portable consumer electronics, handheld instruments, and IoT sensor nodes that require a stable 3.3 V rail from a lithium-ion or single-cell battery. Its low dropout voltage of 210 mV and shutdown capability make it effective in power-sequencing schemes where rail switching is needed. The compact SOT-23 footprint integrates easily into tight PCB layouts alongside microcontrollers and wireless modules.
Specifications
| Pbfree Code | Yes |
| YTEOL | 6.8 |
| Dropout Voltage1-Max | 0.21V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 3.51V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.15A |
| Output Voltage1-Max | 3.366V |
| Output Voltage1-Min | 3.234V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| 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 |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TC2185-3.3VCT:
Regulator, 3.3V, 0.21V Dropout, CMOS, PDSO5
Frequently Asked Questions
How much headroom does the TC2185-3.3VCT require between input and output voltage for proper regulation?
The TC2185-3.3VCT requires a minimum dropout voltage of 210 mV at the full 150 mA load, meaning the input must stay at or above 3.51 V to maintain a regulated 3.3 V output. At lighter loads, the dropout voltage drops further, allowing operation from nearly depleted lithium-ion cells above 3.5 V without loss of regulation.
Which battery-powered applications benefit most from the TC2185-3.3VCT's shutdown feature?
IoT sensor nodes, Bluetooth Low Energy modules, and portable medical monitors benefit most because these systems duty-cycle their 3.3 V rail between active and sleep states. Pulling the shutdown pin low reduces quiescent current to under 1 µA, extending a 1000 mAh battery runtime by hours in systems with long sleep intervals between 10 ms active bursts.
How does the TC2185-3.3VCT compare to a switching regulator for a 3.7 V Li-ion to 3.3 V conversion?
With only 0.4 V difference between a 3.7 V Li-ion nominal and the 3.3 V output rail, the TC2185-3.3VCT achieves approximately 89% efficiency at 100 mA—competitive with many low-power buck converters. Unlike switchers, the LDO adds zero switching noise and requires no inductor, reducing BOM cost and EMI filtering complexity in RF-sensitive designs.
What is the full operating temperature range of the TC2185-3.3VCT and which industrial environments does it support?
The TC2185-3.3VCT is rated for -40°C to 125°C junction temperature, covering automotive-adjacent, industrial automation, and outdoor enclosure environments. The extended high-temperature ceiling of 125°C ensures reliable regulation in under-hood or high-ambient enclosures where ambient air temperature may reach 85°C plus self-heating contributions.
What PCB area does the SOT-23 5-pin package of the TC2185-3.3VCT occupy and what external components are required?
The 5-pin SOT-23 package measures approximately 2.9 mm × 1.6 mm, occupying under 5 mm² of PCB area. The TC2185-3.3VCT requires only a 1 µF input bypass capacitor and a 1 µF output capacitor for stable operation, making the total solution footprint under 15 mm² including passives.
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