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Microchip Technology TC1173-2.8VUA
- Part No.:
- TC1173-2.8VUA
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1173-2.8VUA.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
TC1173-2.8VUA 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 shutdown control.
For engineers reviewing the TC1173-2.8VUA datasheet, TC1173-2.8VUA pinout, TC1173-2.8VUA application, or TC1173-2.8VUA equivalent, key selection factors include its MSOP-8 package footprint, ERROR flag for low-battery detection or reset generation, Bypass input for 260nV/√Hz noise reduction, and thermal/overcurrent protection enabling robust operation in medical instruments and GSM phones.
Technical Context
The TC1173-2.8VUA uses CMOS pass transistor architecture-unlike bipolar LDOs-to maintain constant 50µA supply current across 0–300mA load range while holding VOUT stable within ±0.5%. Its internal feed-forward compensation ensures fast transient response to step-load changes.
It integrates an open-drain ERROR output asserting low when VOUT drops >5% below 2.8V (i.e., ≤2.66V), configurable as either low-battery warning or processor RESET via external RC network. Shutdown control (SHDN) reduces supply current to 0.05µA and forces VOUT/ERROR to zero when driven low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±0.5% (±14mV) - ensures stable core logic or analog sensor biasing without external feedback. |
| Max Output Current | 300mA - supports moderate-power microcontrollers, RF modules, or display drivers in portable systems. |
| Dropout Voltage | 240mV at 300mA - enables regulation from 3.04V input, critical for single-cell Li-ion or alkaline battery operation. |
| Supply Current | 50µA typical at full load - extends battery life significantly vs. bipolar regulators (20–60× lower). |
| Output Noise | 260nV/√Hz at 1kHz - minimized via optional 470pF Bypass capacitor, suitable for noise-sensitive ADCs or RF circuitry. |
| ERROR Threshold | 2.66V (95% of 2.8V) with 50mV hysteresis - provides reliable low-voltage warning before system brownout. |
| Shutdown Current | 0.05µA typical - preserves battery charge during deep sleep or standby modes. |
Pinout & Package
TC1173-2.8VUA is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.1mm height), optimized for space-constrained portable designs. Thermal resistance θJA is 200°C/W, requiring PCB copper pour under exposed pad (if present) for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Unregulated input supply | Accepts 2.7–6.0V; must exceed VOUT + dropout (≥3.04V) to sustain 300mA output. |
| VOUT (Pin 1) | Regulated 2.8V output | Delivers up to 300mA; requires ≥1µF ceramic or tantalum output capacitor for stability. |
| GND (Pin 2) | Power ground reference | Low-impedance return path; must be routed separately from noisy digital grounds. |
| Bypass (Pin 4) | Reference bypass input | Connects to 470pF capacitor to reduce internal reference noise, cutting output noise to 260nV/√Hz. |
| ERROR (Pin 5) | Open-drain out-of-regulation flag | Pulls low when VOUT ≤2.66V; requires external pull-up (to VIN or VOUT) for logic-level signaling. |
| SHDN (Pin 6) | Active-high shutdown control | Drives high (>45% VIN) to enable regulator; drives low (<15% VIN) to enter 0.05µA shutdown mode. |
| NC (Pins 3 & 7) | No-connect terminals | Must remain unconnected; no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise operation | 260nV/√Hz output noise with 470pF Bypass cap-enables clean power for precision analog circuits. |
| Fast load transient response | Internal feed-forward compensation delivers <10µs recovery from 10–90% load steps-critical for burst-mode processors. |
| Integrated protection | Thermal shutdown (150°C trip) and current limiting (550–650mA short-circuit limit)-prevents damage during fault conditions. |
| Low-battery detection | ERROR output asserts at 95% of nominal VOUT (2.66V) with 50mV hysteresis-avoids chatter near threshold. |
| Minimal external components | Stable with only 1µF output capacitor-reduces BOM count and board area vs. LDOs requiring 10µF+ ceramics. |
Applications
| Portable Medical Devices | GSM/PHS Handsets |
|---|---|
Use Scenario: Powering glucose meters, pulse oximeters, or portable ECG monitors operating from single AA/AAA cells. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying microcontroller, analog front-end, and LCD driver. Use Value: 50µA quiescent current extends battery life to >1 year; 240mV dropout allows operation down to 3.04V input, maximizing usable cell voltage range. | Use Scenario: Regulating power to baseband processor and RF transceiver in 2G cellular handsets. IC Role / Device Role / Timing Role: Low-noise post-regulator after switching DC/DC converter, with ERROR used as battery-low interrupt. Use Value: 260nV/√Hz noise prevents RF desensitization; ERROR flag triggers graceful shutdown before brownout resets the modem. |
| Linear Post-Regulator for SMPS | Instrumentation & Data Acquisition |
Use Scenario: Cleaning ripple from buck converter outputs in test equipment or industrial controllers. IC Role / Device Role / Timing Role: Secondary LDO filtering high-frequency switching noise from primary SMPS stage. Use Value: PSRR of 60dB at ≤1kHz suppresses SMPS ripple; Bypass input further attenuates reference-related noise for sub-mV stability. | Use Scenario: Supplying precision op-amps, ADCs, and DACs in handheld multimeters or environmental sensors. IC Role / Device Role / Timing Role: Ultra-stable 2.8V reference rail ensuring <0.05% line/load regulation over temperature. Use Value: ±0.5% initial accuracy and 40ppm/°C tempco guarantee <±1.5mV drift from –40°C to +125°C-critical for calibrated measurements. |
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 SOT-23-5 package; 1.6µA IQ (lower than TC1173-2.8VUA's 50µA); no ERROR or Bypass pins. | Lacks battery monitoring and ultra-low-noise capability-suitable only where shutdown and noise are non-critical. | Select if minimal quiescent current dominates design; avoid if ERROR flag or noise performance is required. |
| TPS76328DBVR | 2.8V LDO in SOT-23-5; 90µA IQ; includes ERROR (RESET) output but no Bypass input; 350mV dropout at 150mA. | Higher dropout limits use with low-VIN sources; ERROR lacks hysteresis-requires external circuitry for clean reset assertion. | Choose for TI ecosystem compatibility; verify input headroom suffices for 300mA load given higher dropout. |
Compared with MCP1700-2802E/TO and TPS76328DBVR, TC1173-2.8VUA uniquely combines ERROR flag with hysteresis, Bypass-enabled ultra-low noise, and 240mV dropout in an MSOP-8 package-making it optimal for battery-critical, noise-sensitive portable systems where both reliability and signal integrity are essential.
Availability
TC1173-2.8VUA is available at Aetrix Electronics and suitable for portable medical devices, GSM handsets, linear post-regulators for SMPS, instrumentation, and battery-operated instrumentation requiring stable component supply across production lifecycles.
Supply support for TC1173-2.8VUA 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 TC1173 product line was designed specifically for battery-powered portable electronics demanding ultra-low quiescent current, precise voltage regulation, and integrated fault monitoring-targeting medical, telecom, and instrumentation markets.
FAQ
What is the minimum input voltage required for TC1173-2.8VUA to deliver 300mA output?
The TC1173-2.8VUA requires VIN ≥ VOUT + dropout voltage. At 300mA, dropout is 240mV (max), so minimum VIN = 2.8V + 0.24V = 3.04V. The datasheet also specifies absolute minimum VIN as 2.7V, but this only applies at light loads; for full 300mA, 3.04V is the functional minimum. Below this, regulation fails and ERROR asserts.
Can TC1173-2.8VUA be used without connecting the Bypass pin?
Yes, TC1173-2.8VUA operates fully functional with Bypass (Pin 4) left unconnected. The 470pF capacitor is optional and only needed when ultra-low output noise (260nV/√Hz) is required-for example, powering precision ADCs or RF synthesizers. Omitting it increases noise but does not affect regulation, stability, or basic functionality.
How does the ERROR output of TC1173-2.8VUA behave during shutdown?
During shutdown (SHDN = low), the TC1173-2.8VUA disables the ERROR output-its state becomes high-impedance (open-drain floating). ERROR only functions when SHDN is high and the regulator is enabled. This prevents false low-battery assertions during sleep modes and simplifies system-level reset sequencing.
What is the recommended output capacitor for TC1173-2.8VUA and why?
The TC1173-2.8VUA is stable with a minimum 1µF ceramic or tantalum capacitor from VOUT to GND. The datasheet specifies ESR between 0.1Ω and 5.0Ω. This low capacitance requirement reduces cost and board area versus LDOs needing 10–22µF, while maintaining phase margin and transient response-ideal for compact portable designs.
Does TC1173-2.8VUA support custom output voltages beyond 2.8V?
No-TC1173-2.8VUA is a fixed-output variant. While the TC1173 family offers standard outputs (2.5V, 2.8V, 3.0V, 3.3V, 5.0V), the -2.8VUA suffix denotes factory-trimmed 2.8V. Custom voltages require contacting Microchip directly; they are not orderable as standard part numbers and would involve special manufacturing, not field-programming.
TC1173-2.8VUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
TC1173-2.8VUA FAQ
1.How can I place an order for TC1173-2.8VUA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1173-2.8VUA 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 TC1173-2.8VUA reliable?
The price and inventory of TC1173-2.8VUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1173-2.8VUA is usually 5 days.
3.What payment methods are accepted for TC1173-2.8VUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1173-2.8VUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1173-2.8VUA?
TC1173-2.8VUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1173-2.8VUA 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 TC1173-2.8VUA?
For technical support, including TC1173-2.8VUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1173-2.8VUA requirements.
6.How does Aetrix verify that TC1173-2.8VUA is sourced from the original manufacturer or authorized distributors?
All TC1173-2.8VUA 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 TC1173-2.8VUA meets industry standards.
7.What is the process for return or replacement of TC1173-2.8VUA?
All TC1173-2.8VUA units undergo pre-shipment inspection (PSI). If there is an issue with TC1173-2.8VUA, 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 TC1173-2.8VUA part is unused and in its original packaging.
Return procedure for TC1173-2.8VUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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