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Microchip Technology TC1173-2.8VUATR
- Part No.:
- TC1173-2.8VUATR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1173-2.8VUATR.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,898
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Product details
Overview
TC1173-2.8VUATR from Microchip Technology Inc. is a fixed-output CMOS low dropout (LDO) voltage regulator delivering 2.8 V at up to 300 mA with ±0.5% output accuracy, 240 mV typical dropout at full load, and 50 µA typical supply current. It integrates shutdown control, open-drain ERROR flag, and Bypass input for ultra-low-noise operation in battery-powered portable electronics.
For engineers reviewing the TC1173-2.8VUATR datasheet, TC1173-2.8VUATR pinout, TC1173-2.8VUATR application, or TC1173-2.8VUATR equivalent, key selection criteria include its 2.8 V fixed output, MSOP-8 package footprint, 0.05 µA shutdown current, ERROR threshold at 95% of VOUT (2.66 V), and stability with only 1 µF output capacitance.
Technical Context
The TC1173-2.8VUATR employs a CMOS pass element enabling constant 50 µA supply current across 0–300 mA load, unlike bipolar LDOs. Its internal feed-forward compensation ensures fast transient response to step-load changes.
It features dual protection: thermal shutdown at 150°C and current limiting with 550–650 mA short-circuit output capability. The ERROR output asserts low when VOUT drops ≥5% below 2.8 V (i.e., ≤2.66 V), with 50 mV hysteresis referenced to VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±0.5% - guarantees stable rail for 2.8 V logic or analog circuitry without external feedback. |
| Max Output Current | 300 mA - supports moderate-power microcontrollers, sensors, or RF modules in portable systems. |
| Dropout Voltage | 240 mV @ 300 mA - enables regulation from 3.04 V input, critical for single-cell Li-ion or alkaline battery operation. |
| Supply Current | 50 µA @ full load - extends battery life significantly vs. bipolar regulators (20–60× lower quiescent current). |
| Shutdown Current | 0.05 µA typical - reduces system standby power to near-zero during sleep modes. |
| ERROR Threshold | 2.66 V (95% of 2.8 V) with 50 mV hysteresis - provides reliable low-battery detection or reset assertion without external comparators. |
| Output Noise | 260 nV/√Hz @ 1 kHz - minimized via optional 470 pF Bypass capacitor, suitable for noise-sensitive analog/RF stages. |
| Stability | With ≥1 µF ceramic or tantalum output capacitor - eliminates need for large, costly electrolytics and simplifies layout. |
Pinout & Package
TC1173-2.8VUATR is housed in an 8-pin MSOP package (3.0 mm × 3.0 mm × 1.1 mm body height), optimized for space-constrained portable designs. Thermal resistance θJA is 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Unregulated input supply | Accepts 2.7–6.0 V; must exceed VOUT + dropout (≥3.04 V for 300 mA) to maintain regulation. |
| VOUT (Pin 1) | Regulated 2.8 V output | Delivers up to 300 mA; requires ≥1 µF output capacitor to ground for stability and transient response. |
| GND (Pin 2) | Power ground reference | Common return path for VIN, VOUT, and ERROR; must be low-impedance to minimize noise coupling. |
| Bypass (Pin 4) | Reference bypass input | Connects to 470 pF capacitor to reduce internal reference noise, lowering output noise by >50%. |
| ERROR (Pin 5) | Open-drain out-of-regulation flag | Asserts low when VOUT ≤2.66 V; requires external pull-up (to VIN, VOUT, or logic rail) for reset or warning signaling. |
| SHDN (Pin 6) | Active-high shutdown control | Drives regulator into 0.05 µA shutdown when pulled low; tie to VIN if unused to ensure always-on operation. |
| NC (Pins 3 & 7) | No-connect terminals | Not internally bonded; must remain unconnected to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50 µA at full 300 mA load - preserves battery capacity in always-on medical or instrumentation devices. |
| Low-noise operation | 260 nV/√Hz baseline, reducible further with 470 pF Bypass cap - meets stringent noise specs for ADC references or RF bias rails. |
| Integrated protection | Thermal shutdown (150°C) and current limiting (550–650 mA) - prevents damage during overload or ambient temperature excursions. |
| Fast load transient response | Internal feed-forward compensation - maintains <1% output deviation during 10–90% load steps, critical for digital core supplies. |
| Flexible ERROR functionality | Configurable as low-battery detector or processor RESET with external RC timing - eliminates need for discrete supervisor ICs. |
| Minimal external components | Stable with only 1 µF output capacitor - reduces BOM count, PCB area, and cost versus legacy LDOs requiring 10+ µF. |
Applications
| Portable Medical Sensors | Cellular/GSM Handsets |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery with 2.8 V sensor interface and BLE radio. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying analog front-end and RF transceiver; ERROR monitors battery sag during transmission bursts. Use Value: 50 µA quiescent current extends battery life to >1 year; 240 mV dropout allows operation down to 3.04 V input, maximizing usable cell voltage range. | Use Scenario: GSM phone baseband processor requiring clean, regulated 2.8 V supply with low-noise performance. IC Role / Device Role / Timing Role: Post-regulator for SMPS-derived rail; Bypass input suppresses switching noise from DC-DC converter. Use Value: 260 nV/√Hz noise floor and 470 pF Bypass support RF sensitivity; 300 mA output handles peak processor loads without droop. |
| Linear Post-Regulator for SMPS | Instrumentation Data Loggers |
Use Scenario: Industrial data logger using buck converter followed by low-noise LDO for precision ADC reference. IC Role / Device Role / Timing Role: Low-noise linear post-regulator cleaning noisy SMPS output; ERROR signals undervoltage condition before ADC accuracy degrades. Use Value: PSRR of 60 dB at ≤1 kHz attenuates SMPS ripple; ±0.5% output accuracy ensures consistent ADC full-scale calibration. | Use Scenario: Battery-powered environmental sensor node logging temperature/humidity with microcontroller and flash memory. IC Role / Device Role / Timing Role: Main 2.8 V supply enabling MCU sleep modes; SHDN pin synchronizes with MCU wake/sleep cycles to minimize idle current. Use Value: 0.05 µA shutdown current reduces average system current to sub-µA levels; MSOP-8 footprint saves board space in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2802E/TO | Same 2.8 V output, SOT-23-5 package, 250 mA max, 1.6 µA quiescent current - lower IQ but reduced current capability. | Lower IOUT limits use in higher-current peripherals; smaller SOT-23 footprint eases layout but offers less thermal mass. | Select when ultra-low IQ (<2 µA) is prioritized over 300 mA drive; verify thermal margin at 250 mA continuous load. |
| TPS73128DBVR | 2.8 V fixed, SOT-23-5, 250 mA, 400 µA IQ, 120 mV dropout @ 250 mA - higher IQ but lower dropout than TC1173-2.8VUATR. | Better dropout suits tighter input margins; higher IQ reduces battery life in long-duration applications. | Choose when input voltage is constrained (e.g., 2.92 V min) and 250 mA suffices; avoid where multi-year battery life is mandatory. |
Compared with MCP1700-2802E/TO and TPS73128DBVR, TC1173-2.8VUATR uniquely balances 300 mA drive, 50 µA IQ, and 240 mV dropout in an MSOP-8 package - making it optimal for space-limited, battery-critical systems needing both current headroom and ultra-low standby power.
Availability
TC1173-2.8VUATR is available at Aetrix Electronics and suitable for portable medical instruments, cellular handsets, instrumentation data loggers, and linear post-regulators requiring stable component supply with guaranteed long-term availability.
Supply support for TC1173-2.8VUATR 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 design and wafer fabrication facilities.
The TC1173 product line was designed specifically for ultra-low-power, high-accuracy LDO regulation in battery-operated portable electronics - emphasizing minimal quiescent current, low noise, and integrated fault signaling.
FAQ
What is the minimum input voltage required for TC1173-2.8VUATR to maintain regulation at 300 mA?
The TC1173-2.8VUATR requires a minimum input voltage of 3.04 V to sustain 2.8 V output at 300 mA, based on its typical 240 mV dropout voltage. This value satisfies both the dropout constraint (VIN ≥ VOUT + VDROP) and the absolute minimum VIN specification of 2.7 V stated in the datasheet.
How does the ERROR output of TC1173-2.8VUATR function, and what is its exact threshold?
The ERROR output of TC1173-2.8VUATR is an open-drain flag that goes low when VOUT falls to 95% of its nominal value - precisely 2.66 V for the 2.8 V variant - with 50 mV hysteresis. It remains asserted until VOUT rises above 2.71 V, providing noise-immune low-battery or reset signaling without external components.
Can TC1173-2.8VUATR operate with a 1 µF ceramic output capacitor, and why is this significant?
Yes, TC1173-2.8VUATR is stable with a minimum 1 µF ceramic or tantalum output capacitor, as confirmed in the datasheet's "Output Capacitor" section. This eliminates reliance on larger, less reliable electrolytic capacitors and reduces PCB area and BOM cost - a key advantage over older LDOs requiring ≥10 µF.
What is the shutdown current of TC1173-2.8VUATR, and how is it enabled?
The TC1173-2.8VUATR draws only 0.05 µA typical supply current in shutdown mode, activated by pulling the SHDN pin (Pin 6) low. During shutdown, VOUT and ERROR fall to zero, making it ideal for deep-sleep states in battery-powered systems where µA-level leakage is unacceptable.
Is TC1173-2.8VUATR compatible with lead-free reflow soldering processes?
Yes, TC1173-2.8VUATR is rated for standard lead-free reflow profiles per JEDEC J-STD-020. Its MSOP-8 package uses matte tin plating and withstands peak temperatures up to 260°C for 10 seconds, ensuring compatibility with modern RoHS-compliant assembly lines without reliability degradation.
TC1173-2.8VUATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.48V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
TC1173-2.8VUATR FAQ
1.How can I place an order for TC1173-2.8VUATR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1173-2.8VUATR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TC1173-2.8VUATR reliable?
The price and inventory of TC1173-2.8VUATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1173-2.8VUATR is usually 5 days.
3.What payment methods are accepted for TC1173-2.8VUATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1173-2.8VUATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1173-2.8VUATR?
TC1173-2.8VUATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1173-2.8VUATR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TC1173-2.8VUATR?
For technical support, including TC1173-2.8VUATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1173-2.8VUATR requirements.
6.How does Aetrix verify that TC1173-2.8VUATR is sourced from the original manufacturer or authorized distributors?
All TC1173-2.8VUATR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TC1173-2.8VUATR meets industry standards.
7.What is the process for return or replacement of TC1173-2.8VUATR?
All TC1173-2.8VUATR units undergo pre-shipment inspection (PSI). If there is an issue with TC1173-2.8VUATR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TC1173-2.8VUATR part is unused and in its original packaging.
Return procedure for TC1173-2.8VUATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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