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Microchip Technology TC1173-2.5VOA
- Part No.:
- TC1173-2.5VOA
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1173-2.5VOA.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,469
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Product details
Overview
TC1173-2.5VOA from Microchip Technology Inc. is a fixed-output CMOS low dropout (LDO) voltage regulator delivering 2.5V ±0.5% at up to 300mA, with ultra-low 50µA typical supply current, 240mV typical dropout at full load, and integrated ERROR flag for out-of-regulation detection. It serves as a precision post-regulator in battery-powered portable electronics requiring stable low-noise power.
For engineers reviewing the TC1173-2.5VOA datasheet, TC1173-2.5VOA pinout, TC1173-2.5VOA application, or TC1173-2.5VOA equivalent, key selection criteria include its 2.5V fixed output, MSOP-8 package footprint, shutdown control (SHDN), bypass input for noise reduction, and ERROR open-drain output usable as low-battery warning or processor reset signal.
Technical Context
The TC1173-2.5VOA employs CMOS pass transistor architecture enabling constant 50µA supply current independent of load-unlike bipolar LDOs-and maintains regulation from 0mA to 300mA. Its internal feed-forward compensation ensures fast transient response to step-load changes.
It integrates dual protection: thermal shutdown triggers at ~150°C and latches off until die cools to ~140°C; over-current limiting caps output at ~600mA. The ERROR output asserts low when VOUT drops >5% below 2.5V (i.e., <2.375V), with 50mV hysteresis referenced to VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±0.5% (±12.5mV) - ensures stable logic-level supply for 2.5V-core microcontrollers and sensors. |
| Max Output Current | 300mA - supports moderate-power peripherals like LCD drivers or RF front-ends without external boost. |
| Dropout Voltage | 240mV at 300mA - enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline (3.2V min) with margin. |
| Supply Current | 50µA typical at full load - extends battery life in always-on monitoring systems by >20× vs. bipolar regulators. |
| ERROR Threshold | 2.375V (–5% of 2.5V) with 50mV hysteresis - provides reliable low-battery detection without external comparators. |
| Shutdown Current | 0.05µA typical - reduces quiescent drain to negligible levels during system sleep modes. |
| Output Noise | 260nV/√Hz at 1kHz - meets low-noise requirements for precision ADCs and RF synthesizers. |
| Input Voltage Range | 2.7V to 6.0V - compatible with wide-input DC-DC stages and unregulated battery sources. |
Pinout & Package
TC1173-2.5VOA is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 0.95mm), optimized for space-constrained portable designs. Pin 1 is marked with a dot; pin numbering follows standard MSOP convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Unregulated input supply | Accepts 2.7–6.0V; must be decoupled with ≥1µF capacitor near pin for stability and noise rejection. |
| VOUT (Pin 2) | Regulated 2.5V output | Delivers up to 300mA; requires ≥1µF output capacitor (ESR 0.1–5Ω) for loop stability. |
| GND (Pin 3) | Ground reference | Common return for VIN, VOUT, SHDN, ERROR; must connect to low-impedance ground plane. |
| BYPASS (Pin 4) | Reference bypass input | Connects to 470pF capacitor to reduce internal reference noise and lower output noise to 260nV/√Hz. |
| ERROR (Pin 5) | Open-drain out-of-regulation flag | Asserts low when VOUT <2.375V; requires external pull-up (to VIN or VOUT) for logic-level interface. |
| SHDN (Pin 6) | Active-high shutdown control | Drives regulator into 0.05µA sleep mode when pulled low; VIH ≥45% VIN, VIL ≤15% VIN. |
| NC (Pins 1 & 7) | No-connect terminals | Not internally bonded; must remain unconnected per Microchip design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise operation | 260nV/√Hz output noise with 470pF on BYPASS pin - eliminates need for external LDO post-filtering in sensitive analog chains. |
| Fast load transient response | Internal feed-forward compensation - recovers within microseconds after 100mA step load, critical for burst-mode wireless transceivers. |
| Thermal & over-current protection | Auto-shutdown at 150°C junction temp and current limit ~600mA - prevents damage during short-circuit or high ambient conditions. |
| Low-dropout performance | 240mV dropout at 300mA - enables >90% efficiency from 2.75V input, maximizing usable battery voltage range. |
| CMOS architecture | 50µA supply current constant across 0–300mA load - eliminates battery-life penalty from increasing load current. |
| ERROR output flexibility | Open-drain ERROR with 5% threshold and hysteresis - configurable as hardware reset (with RC timing) or low-battery interrupt without external components. |
Applications
| Portable Medical Sensors | Cellular/GSM Handsets |
|---|---|
Use Scenario: Continuous glucose monitor powered by coin-cell battery with 2.5V ADC and Bluetooth LE radio. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying ADC reference, sensor bias, and BLE SoC I/O domain. Use Value: 50µA quiescent current extends 3V CR2032 battery life beyond 12 months; ERROR flag triggers firmware alert at 2.375V to initiate graceful shutdown before data loss. | Use Scenario: Dual-voltage GSM handset using 2.5V for baseband processor core and 3.3V for RF transceiver. IC Role / Device Role / Timing Role: Secondary LDO generating clean 2.5V rail from main 3.6V Li-ion supply, isolated from noisy RF switching. Use Value: 260nV/√Hz noise and 240mV dropout ensure stable core voltage during transmit bursts; BYPASS pin suppresses switching noise coupling into analog sections. |
| Linear Post-Regulator for SMPS | Industrial Portable Instruments |
Use Scenario: 5V buck converter output feeding 2.5V FPGA I/O bank requiring tighter regulation and lower noise than SMPS alone provides. IC Role / Device Role / Timing Role: Low-noise linear post-regulator filtering ripple and high-frequency noise from upstream DC-DC stage. Use Value: 60dB PSRR at 1kHz attenuates SMPS ripple; 1µF output capacitor suffices for stability - avoids bulky ceramic arrays needed by older LDOs. | Use Scenario: Handheld multimeter with 2.5V precision op-amp front-end and LCD display powered from 9V alkaline battery. IC Role / Device Role / Timing Role: Fixed 2.5V regulator for analog signal conditioning path, decoupled from digital supply via separate ground trace. Use Value: ±0.5% initial accuracy and 40ppm/°C tempco maintain measurement linearity across –20°C to +70°C operating range; SHDN pin enables auto-power-off after 5-minute idle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | Same 2.5V output, 250mA max, 6µA IQ, SOT-23-5 package - lower current, much lower quiescent current, no ERROR output. | Lacks ERROR flag and shutdown control; unsuitable where battery monitoring or processor reset is required. | Select MCP1700 only for ultra-low-IQ applications with <250mA load and no fault signaling needs. |
| TPS76325DBVR | 2.5V output, 150mA max, 85µA IQ, SOT-23-5 - includes ERROR but lower current rating and higher dropout (350mV @150mA). | Cannot support 300mA loads; higher dropout limits use with low-VIN sources like partially discharged batteries. | Choose TPS76325 only if SOT-23 footprint is mandatory and load stays ≤150mA with VIN ≥2.85V. |
Compared with MCP1700-2502E/TO and TPS76325DBVR, TC1173-2.5VOA uniquely balances 300mA capability, 50µA IQ, ERROR flag, and 240mV dropout in an MSOP-8 package - making it optimal for space-constrained, battery-critical systems needing both performance and fault visibility.
Availability
TC1173-2.5VOA is available at Aetrix Electronics and suitable for battery-operated medical instruments, cellular handsets, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TC1173-2.5VOA 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 fabs and global quality systems.
The TC1173 product line was designed specifically for ultra-low-power, high-accuracy LDO regulation in portable and battery-backed systems - emphasizing quiescent current optimization, dropout minimization, and integrated fault signaling.
FAQ
What is the minimum input voltage required for TC1173-2.5VOA to regulate at full 300mA load?
The TC1173-2.5VOA requires VIN ≥ VOUT + dropout voltage. At 300mA, dropout is 240mV (typical), so minimum VIN = 2.5V + 0.24V = 2.74V. Per datasheet Note 8, absolute minimum VIN is also specified as 2.7V - thus 2.74V governs for full-load regulation. Below this, TC1173-2.5VOA enters dropout and VOUT declines linearly with VIN.
Can TC1173-2.5VOA be used without connecting the BYPASS pin?
Yes, TC1173-2.5VOA operates fully functional with BYPASS (Pin 4) left unconnected. The 470pF capacitor is optional and only required when ultra-low output noise (260nV/√Hz) is critical - e.g., for precision ADC references or RF synthesizer supplies. Omitting it increases noise but does not affect regulation, stability, or basic functionality of TC1173-2.5VOA.
How does the ERROR output of TC1173-2.5VOA behave during shutdown?
During shutdown (SHDN = low), the TC1173-2.5VOA disables its internal regulator and pulls VOUT to 0V. Concurrently, the ERROR output is disabled - it becomes high-impedance and does not actively drive low or high. Any external pull-up remains effective, but ERROR loses its out-of-regulation assertion capability while TC1173-2.5VOA is in shutdown mode.
Is TC1173-2.5VOA stable with ceramic output capacitors?
Yes, TC1173-2.5VOA is stable with ceramic output capacitors ≥1µF, provided their ESR falls within 0.1Ω to 5.0Ω. Standard X5R/X7R ceramics meet this range. Avoid ultra-low-ESR types (<0.1Ω) unless verified with Microchip's stability simulation tools, as they may induce oscillation. The TC1173-2.5VOA datasheet explicitly validates 1µF ceramic use in Section 3.2.
What is the thermal resistance (θJA) of the TC1173-2.5VOA in its MSOP-8 package?
The TC1173-2.5VOA in the 8-pin MSOP package has a junction-to-air thermal resistance (θJA) of approximately 200°C/W, as stated in DS21362C-page 5, Section 4.2. This value assumes standard PCB layout with minimal copper; adding thermal vias and ground plane area can reduce effective θJA and improve power handling capability of TC1173-2.5VOA.
TC1173-2.5VOA 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):
- 2.5V
- 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
TC1173-2.5VOA FAQ
1.How can I place an order for TC1173-2.5VOA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1173-2.5VOA 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 TC1173-2.5VOA reliable?
The price and inventory of TC1173-2.5VOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1173-2.5VOA is usually 5 days.
3.What payment methods are accepted for TC1173-2.5VOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1173-2.5VOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1173-2.5VOA?
TC1173-2.5VOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1173-2.5VOA 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 TC1173-2.5VOA?
For technical support, including TC1173-2.5VOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1173-2.5VOA requirements.
6.How does Aetrix verify that TC1173-2.5VOA is sourced from the original manufacturer or authorized distributors?
All TC1173-2.5VOA 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 TC1173-2.5VOA meets industry standards.
7.What is the process for return or replacement of TC1173-2.5VOA?
All TC1173-2.5VOA units undergo pre-shipment inspection (PSI). If there is an issue with TC1173-2.5VOA, 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 TC1173-2.5VOA part is unused and in its original packaging.
Return procedure for TC1173-2.5VOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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