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Microchip Technology TC1173-2.8VOA
- Part No.:
- TC1173-2.8VOA
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1173-2.8VOA.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,890
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Product details
Overview
TC1173-2.8VOA from Microchip Technology Inc. is a fixed-output CMOS low dropout (LDO) voltage regulator delivering 2.8V at up to 300mA, with ±0.5% output accuracy, 240mV typical dropout at full load, and 50µA typical supply current. It serves as a precision post-regulator in battery-powered portable electronics requiring ultra-low noise and long runtime.
For engineers reviewing the TC1173-2.8VOA datasheet, TC1173-2.8VOA pinout, TC1173-2.8VOA application, or TC1173-2.8VOA equivalent, key selection considerations include its ERROR flag for low-battery detection, shutdown control input (SHDN), bypass-capable ultra-low-noise operation (260nV/√Hz), and stability with only 1µF output capacitance.
Technical Context
The TC1173-2.8VOA employs CMOS pass transistor architecture enabling constant 50µA supply current across 0–300mA load range-unlike bipolar LDOs-and integrates internal feed-forward compensation for fast transient response. Its ERROR output is an open-drain signal asserting low when VOUT drops >5% below 2.8V due to input undervoltage, overcurrent, or thermal limiting.
Shutdown is controlled via SHDN pin with VIH ≥45% VIN and VIL ≤15% VIN; in shutdown, supply current falls to 0.05µA (typ), VOUT and ERROR go to zero. The device includes both overtemperature (150°C trip) and overcurrent (550–650mA short-circuit limit) protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±0.5% (±14mV) at 25°C; stable over –40°C to +125°C junction range |
| Max Output Current | 300mA continuous; supports peak loads without dropout or regulation loss |
| Dropout Voltage | 240mV typical at 300mA load; enables operation with VIN as low as 3.04V |
| Supply Current | 50µA typical at full load; 20–60× lower than bipolar regulators, extending battery life |
| Output Noise | 260nV/√Hz at 1kHz; reduced further with 470pF bypass capacitor on Bypass pin |
| PSRR | 60dB at ≤1kHz; suppresses ripple from upstream SMPS in hybrid power architectures |
| ERROR Threshold | Asserts low when VOUT ≤2.66V (–5% of 2.8V); provides reliable low-battery warning or reset trigger |
Pinout & Package
TC1173-2.8VOA is housed in an 8-pin SOIC package (JEDEC MS-012AC, 3.99mm × 4.90mm × 1.75mm), with exposed pad not present. Pin 1 is marked by a beveled corner or dot; pins are numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Unregulated input supply | Accepts 2.7–6.0V; must exceed VOUT + dropout (≥3.04V for 2.8V output) |
| VOUT (Pins 1,2) | Regulated output | Dual-source output pins reduce trace resistance; delivers 2.8V ±0.5% at up to 300mA |
| GND (Pin 3) | Ground reference | Primary return path for load and internal circuitry; requires low-impedance PCB connection |
| Bypass (Pin 4) | Reference bypass input | Connect 470pF to GND to reduce output noise; left open if noise performance is non-critical |
| ERROR (Pin 5) | Open-drain out-of-regulation flag | Pulled low when VOUT ≤2.66V; used directly for low-battery detection or with RC network for processor RESET |
| SHDN (Pin 6) | Active-high shutdown control | Logic high (≥45% VIN) enables regulator; logic low (≤15% VIN) reduces supply current to 0.05µA |
| NC (Pins 7,3) | No-connect | Not internally bonded; must remain unconnected per datasheet to avoid malfunction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50µA typical at full 300mA load-enables multi-year battery life in always-on medical sensors |
| Low-noise operation | 260nV/√Hz baseline; reduced further with optional 470pF bypass capacitor for RF-sensitive analog circuits |
| Integrated ERROR flag | Open-drain output with 5% hysteresis triggers at 2.66V-eliminates need for external supervisor IC in portable systems |
| Fast transient response | Internal feed-forward compensation maintains regulation during 100mA step-load changes within microseconds |
| Robust protection | Auto-recovering thermal shutdown (150°C trip) and current limiting (550–650mA) prevent damage under fault conditions |
Applications
| Medical Instrumentation | Portable Computing |
|---|---|
Use Scenario: Powering low-power ADCs, real-time clocks, and memory backup in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying critical analog and digital subsystems with tight voltage tolerance. Use Value: ±0.5% output accuracy ensures sensor measurement integrity; 50µA quiescent current extends single-CR2032 battery life beyond 3 years. | Use Scenario: Post-regulating switched-mode power supply outputs in ultraportable laptops and tablets. IC Role / Device Role / Timing Role: Linear post-regulator cleaning SMPS ripple before feeding core logic and I/O rails. Use Value: 60dB PSRR at 1kHz suppresses switching noise; 1µF minimum output capacitance simplifies layout and reduces BOM count. |
| Cellular/GSM Handsets | Linear Post-Regulators for SMPS |
Use Scenario: Supplying baseband processors and RF front-end bias in 2G/3G mobile phones with aggressive power cycling. IC Role / Device Role / Timing Role: Shutdown-controlled 2.8V rail enabling rapid system sleep/wake transitions. Use Value: 0.05µA shutdown current minimizes leakage; SHDN pin compatible with standard CMOS I/O for seamless MCU integration. | Use Scenario: Providing clean, low-noise 2.8V for precision analog circuitry (e.g., DACs, op-amps) downstream of buck converters. IC Role / Device Role / Timing Role: Final-stage LDO ensuring stable, quiet voltage despite upstream SMPS ripple and load transients. Use Value: 240mV dropout allows operation from 3.04V input-maximizing efficiency while maintaining headroom for worst-case line/load regulation. |
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 2.8V output, but 250mA max current and 1.6µA quiescent current; no ERROR pin or Bypass input | Lacks out-of-regulation monitoring and ultra-low-noise capability; suited for simpler, ultra-low-IQ applications | Select MCP1700-2802E/TO only if ERROR flag and <300mA load are unnecessary and sub-µA IQ is critical |
| TPS76328DBVR | 2.8V output, 150mA max, 85µA IQ, integrated thermal/overcurrent protection; no ERROR or Bypass features | Lower current rating and higher IQ; lacks dedicated low-battery signaling or noise optimization | Choose TPS76328DBVR only for cost-sensitive, lower-current designs where TI's qualification and support are preferred |
Compared with MCP1700-2802E/TO and TPS76328DBVR, TC1173-2.8VOA uniquely combines 300mA drive, 50µA IQ, ERROR flag, and Bypass-enabled ultra-low-noise operation-making it the only option among the three qualified for precision battery-powered instrumentation requiring both high current and diagnostic capability.
Availability
TC1173-2.8VOA is available at Aetrix Electronics and suitable for battery-operated systems, portable computing, and medical instrumentation requiring stable component supply, long-lifecycle availability, and guaranteed traceability.
Supply support for TC1173-2.8VOA 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 linear regulation in space-constrained portable and medical electronics-emphasizing battery longevity, noise immunity, and integrated system supervision.
FAQ
What is the minimum input voltage required for TC1173-2.8VOA to maintain regulation?
The TC1173-2.8VOA requires VIN ≥ VOUT + dropout voltage. With a typical 240mV dropout at 300mA, the minimum functional VIN is 3.04V. Per datasheet Note 8, VIN must also be ≥2.7V across the full load range-so 3.04V is the binding constraint. Below this, the ERROR pin asserts low, indicating out-of-regulation operation.
Can TC1173-2.8VOA be used without connecting the Bypass pin?
Yes, TC1173-2.8VOA operates fully functional with the Bypass pin (Pin 4) left unconnected. The 470pF capacitor is optional and only required when ultra-low output noise (e.g., <260nV/√Hz) is needed for sensitive analog circuits. Leaving it open increases output noise but has no impact on regulation, stability, or basic functionality.
How does the ERROR output of TC1173-2.8VOA behave during shutdown?
During shutdown (SHDN = low), the ERROR output of TC1173-2.8VOA is disabled and floats high-impedance-neither driven nor clamped. It does not assert low. The ERROR function is only active when SHDN is high and the regulator is enabled; this prevents false low-battery signals during intentional system sleep modes.
Is TC1173-2.8VOA stable with ceramic output capacitors?
Yes, TC1173-2.8VOA is stable with ceramic capacitors ≥1µF, provided their effective series resistance (ESR) is between 0.1Ω and 5.0Ω. Standard X5R/X7R ceramics meet this requirement. Avoid ultra-low-ESR types (<0.1Ω) unless verified with the specific capacitor model, as they may risk instability per Section 3.2 of the datasheet.
What is the thermal shutdown behavior of TC1173-2.8VOA?
TC1173-2.8VOA initiates thermal shutdown when junction temperature exceeds 150°C, disabling output and reducing supply current to 0.05µA. It automatically recovers and resumes regulation once die temperature falls to ~140°C. This hysteresis prevents oscillation near the trip point and protects against sustained overload or poor PCB thermal design.
TC1173-2.8VOA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-SOIC
TC1173-2.8VOA FAQ
1.How can I place an order for TC1173-2.8VOA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1173-2.8VOA 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 TC1173-2.8VOA reliable?
The price and inventory of TC1173-2.8VOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1173-2.8VOA is usually 5 days.
3.What payment methods are accepted for TC1173-2.8VOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1173-2.8VOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1173-2.8VOA?
TC1173-2.8VOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1173-2.8VOA 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 TC1173-2.8VOA?
For technical support, including TC1173-2.8VOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1173-2.8VOA requirements.
6.How does Aetrix verify that TC1173-2.8VOA is sourced from the original manufacturer or authorized distributors?
All TC1173-2.8VOA 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 TC1173-2.8VOA meets industry standards.
7.What is the process for return or replacement of TC1173-2.8VOA?
All TC1173-2.8VOA units undergo pre-shipment inspection (PSI). If there is an issue with TC1173-2.8VOA, 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 TC1173-2.8VOA part is unused and in its original packaging.
Return procedure for TC1173-2.8VOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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