My Inquiry
My Account
Microchip Technology TC1173-3.3VOA
- Part No.:
- TC1173-3.3VOA
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1173-3.3VOA.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,837
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TC1173-3.3VOA from Microchip Technology Inc. is a fixed-output CMOS low dropout (LDO) voltage regulator delivering 3.3V ±0.5% at up to 300mA, with ultra-low 50µA typical supply current and 240mV typical dropout at full load. It features an open-drain ERROR output for out-of-regulation detection, shutdown control (SHDN), and Bypass input for noise reduction-used in battery-powered medical instruments and portable computing systems.
For engineers reviewing the TC1173-3.3VOA datasheet, TC1173-3.3VOA pinout, TC1173-3.3VOA application, or TC1173-3.3VOA equivalent, key selection criteria include its 3.3V precision output, 0.05µA shutdown current, -40°C to +125°C operating range, MSOP-8 package, and integrated over-temperature/over-current protection.
Technical Context
The TC1173-3.3VOA employs CMOS pass transistor architecture enabling stable regulation across 0–300mA load without supply current increase-unlike bipolar LDOs. Its internal feed-forward compensation ensures fast transient response to step-load changes.
ERROR is an open-drain flag asserting low when VOUT drops >5% below 3.3V (i.e., ≤3.135V), usable as low-battery warning or processor reset (with external RC network). Shutdown reduces supply current to 0.05µA typical and forces VOUT/ERROR to zero.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±0.5% - precision regulation suitable for 3.3V logic rails and analog subsystems requiring tight tolerance. |
| Max Output Current | 300mA - sufficient to power microcontrollers, sensors, and RF modules in portable devices. |
| Dropout Voltage | 240mV at 300mA - enables operation from 3.54V input, supporting single-cell Li-ion or dual-cell alkaline sources. |
| Supply Current | 50µA typical at full load - extends battery life significantly versus bipolar regulators (20–60× lower). |
| Shutdown Current | 0.05µA typical - critical for long-term standby in medical wearables and remote sensors. |
| Output Noise | 260nV/√Hz at 1kHz - low-noise performance enhanced by optional 470pF Bypass capacitor. |
| Operating Temp | -40°C to +125°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
TC1173-3.3VOA is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 1.1mm), optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Unregulated input supply | Accepts 2.7–6.0V; must exceed VOUT + dropout (≥3.54V for 3.3V output) to maintain regulation. |
| VOUT (Pin 2) | Regulated 3.3V output | Delivers up to 300mA; stable with ≥1µF ceramic or tantalum output capacitor. |
| GND (Pin 3) | Ground reference | Common return path for VIN, VOUT, SHDN, ERROR, and Bypass; requires low-impedance layout. |
| Bypass (Pin 4) | Reference bypass input | Connects to ground via 470pF capacitor to reduce internal reference noise and lower output noise by >50%. |
| ERROR (Pin 5) | Open-drain out-of-regulation flag | Asserts low when VOUT ≤3.135V; requires external pull-up (to VIN/VOUT) for reset or battery-warning logic. |
| SHDN (Pin 6) | Active-high shutdown control | Drives regulator into ultra-low-power state (0.05µA) when pulled low; VIH ≥45% VIN, VIL ≤15% VIN. |
| NC (Pins 1, 7) | No-connect terminals | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling or thermal issues. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 50µA typical at full load - enables multi-year battery operation in always-on IoT edge nodes. |
| Low-noise Bypass input | 470pF capacitor reduces output noise to 260nV/√Hz - critical for ADC references and RF front-end power rails. |
| Integrated protection | Thermal shutdown (150°C trip) and current limiting (550–650mA short-circuit limit) prevent damage during fault conditions. |
| Fast load transient response | Internal feed-forward compensation maintains regulation during 100mA step loads - avoids brownouts in burst-mode MCU applications. |
| Wide input voltage range | 2.7–6.0V operation supports diverse sources: Li-ion (3.0–4.2V), 2xAA (2.4–3.2V), or SMPS post-regulation. |
Applications
| Portable Medical Sensors | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and electrochemical sensor interface. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU, BLE SoC, and analog front-end; ERROR monitors battery depletion to trigger alert before cutoff. Use Value: 50µA quiescent current extends coin-cell life beyond 12 months; 240mV dropout allows operation down to 3.54V input during battery discharge. | Use Scenario: Handheld multimeter with LCD display, precision ADC, and auto-ranging circuitry. IC Role / Device Role / Timing Role: Stable 3.3V rail for 24-bit sigma-delta ADC and display driver; Bypass input minimizes switching noise coupling into measurement path. Use Value: 260nV/√Hz output noise ensures <1 LSB noise floor in 100kSPS measurements; ±0.5% accuracy meets Class II metering standards. |
| Cellular/GSM Modem Modules | Linear Post-Regulator for SMPS |
Use Scenario: Compact LTE-M module in asset tracker using Li-SOCl₂ primary cell (3.6V nominal). IC Role / Device Role / Timing Role: Low-noise 3.3V supply for modem baseband IC and RF transceiver; SHDN enables deep-sleep mode between GPS pings. Use Value: 0.05µA shutdown current reduces average system current to <1µA in sleep - enabling 10+ year deployment. | Use Scenario: Industrial PLC I/O module where 5V buck converter feeds TC1173-3.3VOA for isolated 3.3V logic domain. IC Role / Device Role / Timing Role: Clean, low-noise post-regulator rejecting SMPS ripple and EMI; ERROR signals upstream controller if input sag causes dropout. Use Value: 60dB PSRR at ≤1kHz suppresses switching artifacts; ERROR provides deterministic fault signaling instead of silent undervoltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | Same 3.3V output, 250mA max, 1.6µA quiescent current - lower IQ but reduced current capability and no ERROR output. | Lacks out-of-regulation flag and shutdown control; unsuitable where battery monitoring or controlled power-down is required. | Select MCP1700 only for ultra-low-IQ applications with <250mA load and no fault signaling needs. |
| TPS76333DBVR | 3.3V, 150mA, 85µA IQ, active-low ENABLE, no ERROR pin - higher IQ and halved current rating vs. TC1173-3.3VOA. | Missing ERROR functionality and Bypass input; limited to simpler systems without battery health monitoring. | Choose TPS76333DBVR only when TI's ecosystem compatibility outweighs need for ERROR flag and 300mA drive. |
Compared with MCP1700-3302E/TO and TPS76333DBVR, TC1173-3.3VOA uniquely combines 300mA output, ERROR flag, Bypass input, and 50µA IQ in an MSOP-8 package - making it optimal for battery-critical systems requiring both high current and intelligent power management.
Availability
TC1173-3.3VOA is available at Aetrix Electronics and suitable for portable medical sensors, cellular/GSM modem modules, and linear post-regulators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TC1173-3.3VOA 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 delivers precision, low-noise, low-quiescent-current LDO regulators targeting battery-operated and thermally constrained applications-including portable instrumentation, medical devices, and wireless communication modules.
FAQ
What is the minimum input voltage required for TC1173-3.3VOA to maintain regulation?
The TC1173-3.3VOA requires VIN ≥ VOUT + dropout voltage. With a typical 240mV dropout at 300mA, the minimum input is 3.54V. However, the absolute minimum specified VIN is 2.7V - meaning regulation is only guaranteed above 3.54V under full load. At light loads (0.1mA), dropout drops to 20mV, allowing operation down to 3.32V.
How does the ERROR output function in TC1173-3.3VOA, and what threshold triggers it?
The ERROR output of TC1173-3.3VOA is an open-drain signal that asserts low when VOUT falls ≥5% below its nominal 3.3V value - i.e., at or below 3.135V. This occurs due to low input voltage, overcurrent limiting, or thermal shutdown. The threshold has 50mV hysteresis (VH), so ERROR releases when VOUT rises above 3.185V, preventing chatter near the trip point.
Can TC1173-3.3VOA be used without connecting the Bypass pin?
Yes, TC1173-3.3VOA operates fully functional with the Bypass pin (Pin 4) left unconnected. The Bypass input is optional and serves only to reduce output noise - connecting a 470pF capacitor to ground lowers broadband noise to 260nV/√Hz. If noise sensitivity is not critical (e.g., digital-only rails), omitting the capacitor simplifies layout and saves BOM cost.
What package type is used for TC1173-3.3VOA, and are there thermal considerations?
TC1173-3.3VOA uses the 8-pin MSOP package (3.0mm × 3.0mm), with a junction-to-air thermal resistance (θJA) of ~200°C/W. Under worst-case conditions (e.g., 3.0V input, 3.3V/250mA output), power dissipation reaches ~155mW. With a 55°C ambient and 125°C max junction temperature, the allowable dissipation is 350mW - confirming safe operation without heatsinking in typical PCB layouts with moderate copper area.
Does TC1173-3.3VOA require an external capacitor on the output, and what value is recommended?
Yes, TC1173-3.3VOA requires a minimum 1µF output capacitor from VOUT to GND for stability. The datasheet specifies the capacitor must have ESR between 0.1Ω and 5.0Ω - ceramic, tantalum, or aluminum electrolytic types are acceptable. For improved transient response and noise filtering, a 3.3µF capacitor is used in characterization; however, 1µF is the verified minimum for guaranteed stability across temperature and load.
TC1173-3.3VOA 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):
- 3.3V
- 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
TC1173-3.3VOA FAQ
1.How can I place an order for TC1173-3.3VOA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1173-3.3VOA 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 TC1173-3.3VOA reliable?
The price and inventory of TC1173-3.3VOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1173-3.3VOA is usually 5 days.
3.What payment methods are accepted for TC1173-3.3VOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1173-3.3VOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1173-3.3VOA?
TC1173-3.3VOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1173-3.3VOA 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 TC1173-3.3VOA?
For technical support, including TC1173-3.3VOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1173-3.3VOA requirements.
6.How does Aetrix verify that TC1173-3.3VOA is sourced from the original manufacturer or authorized distributors?
All TC1173-3.3VOA 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 TC1173-3.3VOA meets industry standards.
7.What is the process for return or replacement of TC1173-3.3VOA?
All TC1173-3.3VOA units undergo pre-shipment inspection (PSI). If there is an issue with TC1173-3.3VOA, 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 TC1173-3.3VOA part is unused and in its original packaging.
Return procedure for TC1173-3.3VOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TC1173-3.3VOA Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
