Microchip Technology TC1107-2.8VUATR

Overview

TC1107-2.8VUATR from Microchip Technology is a fixed-output, 2.8V CMOS low-dropout (LDO) linear regulator with 300mA output current, ±0.5% output voltage accuracy, and ultra-low 50μA typical quiescent current. It features shutdown control, bypass input for noise reduction, and over-temperature/over-current protection - designed for battery-powered medical instruments and portable communication devices.

For engineers reviewing the TC1107-2.8VUATR datasheet, TC1107-2.8VUATR pinout, TC1107-2.8VUATR application, or TC1107-2.8VUATR equivalent, key selection criteria include dropout voltage at full load (270mV max), shutdown current (0.05μA typ), thermal shutdown threshold (150°C), and MSOP-8 package compatibility with 1μF minimum output capacitance.

Technical Context

The TC1107-2.8VUATR uses a CMOS-based pass element to achieve stable regulation without supply current increase under load - unlike legacy bipolar LDOs. Its reference bypass input accepts a 470pF capacitor to reduce internal reference noise, directly lowering output noise to 260nV/√Hz at 1kHz.

Shutdown is asserted via logic-level SHDN pin (VIH ≥ 45% VIN, VIL ≤ 15% VIN), reducing supply current to 0.05μA and forcing VOUT to 0V. The device remains stable with only 1μF output capacitance and incorporates thermal shutdown (150°C trip, 140°C recovery) and current limiting (550–650mA short-circuit current).

Key Specifications

Pinout & Package

TC1107-2.8VUATR is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.1mm height) with exposed pad not electrically connected. Pin 1 is marked by a dot; pin numbering follows standard MSOP convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2802E/TO, TC1107-2.8VUATR provides active shutdown and noise-reduction capability essential for portable comms; versus TCS2107-2.8VUATR, it trades slightly higher noise and lower PSRR for proven long-term availability and qualification history in medical end-equipment.

Availability

TC1107-2.8VUATR is available at Aetrix Electronics and suitable for battery-operated medical instruments, GSM/PHS handsets, and industrial handheld instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TC1107-2.8VUATR 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 ISO/TS-16949 certified wafer fabrication and design facilities.

The TC1107 product line delivers precision, low-power LDO regulators targeting portable and battery-critical applications - emphasizing ultra-low IQ, tight voltage accuracy, and robust protection features for medical and communications equipment.

FAQ

What is the minimum input voltage required for TC1107-2.8VUATR to regulate at full 300mA load?

The minimum input voltage for TC1107-2.8VUATR is determined by its dropout specification: 270mV maximum at 300mA. With a nominal 2.8V output, VIN must be ≥3.07V to maintain regulation. Additionally, the absolute minimum VIN is specified as 2.7V - so the effective minimum is the greater of these values, i.e., 3.07V. This ensures stable 2.8V output even under worst-case load and temperature conditions.

Does TC1107-2.8VUATR require an external capacitor on the Bypass pin to function?

No, TC1107-2.8VUATR operates fully functional without any capacitor on the Bypass pin. The 470pF capacitor is optional and used solely to reduce output noise - specifically to lower the 260nV/√Hz baseline noise further by stabilizing the internal voltage reference. If ultra-low-noise performance is not required (e.g., in digital-only power rails), the Bypass pin may be left unconnected with no impact on regulation, stability, or basic functionality of TC1107-2.8VUATR.

Can TC1107-2.8VUATR be used in automotive applications?

TC1107-2.8VUATR is rated for a junction temperature range of –40°C to +125°C and includes thermal shutdown (150°C trip), making it technically capable of operation in under-hood or infotainment environments. However, it is not AEC-Q100 qualified, lacks automotive-specific reliability testing, and was designed primarily for portable and industrial applications. For production automotive use, Microchip's AEC-Q100 qualified LDOs (e.g., MCP1826 series) are recommended instead of TC1107-2.8VUATR.

What is the purpose of the three NC pins on TC1107-2.8VUATR in the MSOP-8 package?

The three NC (no-connect) pins on TC1107-2.8VUATR - Pins 1, 2, and 7 in the 8-pin MSOP package - are not internally bonded to the die and serve no electrical function. They must remain unconnected on the PCB to prevent unintended coupling, parasitic capacitance, or potential latch-up. These pins exist for mechanical symmetry and package standardization, not for routing or grounding. Leaving them floating is correct per Microchip's datasheet guidance for TC1107-2.8VUATR.

How does TC1107-2.8VUATR behave during shutdown mode?

When the SHDN pin of TC1107-2.8VUATR is driven low (≤15% VIN), the device enters shutdown mode: the output transistor turns off, VOUT falls to 0V, and total supply current drops to 0.05μA typical (0.5μA max). Internal bias circuits are disabled, and all protections (thermal, current limit) remain inactive. The part resumes normal regulation within microseconds after SHDN rises above VIH (≥45% VIN), with output voltage settling to 2.8V ±0.5% under load - confirming TC1107-2.8VUATR's fast enable/disable behavior.