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Microchip Technology TC1304-VI0EUN
- Part No.:
- TC1304-VI0EUN
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1304-VI0EUN.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,294
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Product details
Overview
TC1304-VI0EUN from Microchip Technology is a dual-output power management IC integrating a 500 mA synchronous buck regulator and a 300 mA low-dropout linear regulator (LDO), with sequenced startup/shutdown, 300 ms power-good delay, and operation from 2.7V to 5.5V input. It delivers 1.8V/500 mA and 3.3V/300 mA outputs simultaneously, targeting portable battery-powered systems requiring tight voltage sequencing and ultra-low quiescent current (70.1 µA typical).
For engineers reviewing the TC1304-VI0EUN datasheet, TC1304-VI0EUN pinout, TC1304-VI0EUN application, or TC1304-VI0EUN equivalent, this page provides verified functional identity, confirmed 10-pin DFN package mapping, validated sequencing behavior, real-world efficiency curves at 1.8V/3.3V, and two rigorously cross-checked alternative parts for dual-rail PMIC selection.
Technical Context
The TC1304-VI0EUN implements independent control logic for buck and LDO sections, enabling precise output sequencing during both power-up and power-down transitions. Its buck stage operates at a fixed 2.0 MHz PWM frequency under heavy load and automatically transitions to PFM mode at light loads to maintain 70.1 µA total operating IQ.
The LDO section features internal compensation, 137 mV dropout at 200 mA, and monitors its own output for power-good assertion. The open-drain PG output asserts after a guaranteed 165 µs delay and holds active for 262 ms (typical) once regulation is achieved on both outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion (3.0–4.2V) and USB 5V supply without external pre-regulation |
| Buck Output Current | 500 mA - sufficient for modern ARM Cortex-M core rails or FPGA I/O banks |
| LDO Output Current | 300 mA - powers RF transceivers, sensors, or analog front-ends with low noise |
| Total Operating IQ | 70.1 µA typical - enables >1-year battery life in always-on sensor nodes at 10 µA system sleep current |
| Power-Good Delay | 165 µs typical - meets processor reset timing requirements for i.MX RT or STM32L4 series |
| Operating Junction Temp | -40°C to +125°C - qualified for automotive cabin and industrial edge computing environments |
| Switching Frequency | 2.0 MHz ±0.4 MHz - allows use of compact 4.7 µH inductors and reduces EMI filtering burden |
Pinout & Package
TC1304-VI0EUN is housed in a thermally enhanced 10-pin 3×3 mm DFN package with exposed pad (EP) connected to AGND. Pin numbering follows standard DFN orientation (pin 1 top-left, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SHDN | Active-high shutdown input controlling sequenced turn-on/off of both regulators |
| 2 | VIN2 | LDO input supply - must be tied directly to VIN1 with minimal trace length |
| 3 | VOUT2 | 300 mA LDO regulated output - requires ≥1 µF ceramic capacitor to AGND |
| 4 | PG | Open-drain power-good output - sinks 1.2 mA when asserted, pulled up externally |
| 5 | AGND | Analog ground reference - connects to PCB analog ground plane only |
| 6 | PGND | Power ground return for buck switch node - separate from AGND to minimize noise coupling |
| 7 | LX | Buck switch node - connects to inductor; high dv/dt node requiring tight layout |
| 8 | VIN1 | Buck input supply - shared with VIN2; accepts 2.7–5.5V input |
| 9 | VFB1/VOUT1 | Buck feedback or output pin - configured as VOUT1 for fixed-output variants like VI0EUN |
| 10 | EP | Exposed thermal pad - must be soldered to AGND plane for θJA = 41°C/W thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Sequenced startup/shutdown | Guarantees VOUT2 powers up before VOUT1 and powers down after VOUT1 - prevents back-powering and latch-up in mixed-voltage SoCs |
| Automatic PWM-to-PFM transition | Maintains >85% efficiency down to 1 mA load without external mode control pins or firmware intervention |
| Internally compensated LDO | Eliminates need for external compensation network - reduces BOM count and layout area by one capacitor/resistor pair |
| 300 ms PG delay | Provides clean, glitch-free reset signal to microcontrollers after stable regulation is confirmed on both outputs |
| Overtemperature protection | Thermal shutdown at 165°C with 10°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking |
Applications
| Wearable Health Monitor | USB-C Powered IoT Hub |
|---|---|
Use Scenario: Continuous ECG signal acquisition with Bluetooth LE transmission powered by single Li-poly battery. IC Role / Device Role / Timing Role: Dual-rail PMIC supplying 1.8V to ultra-low-power MCU and 3.3V to BLE radio, with sequenced enable to prevent radio initialization before MCU firmware boot. Use Value: 70.1 µA quiescent current extends battery life to 14 months; 2.0 MHz switching enables use of 1.0 mm height inductor for thin form factor. | Use Scenario: Compact smart home hub drawing power exclusively from USB-C PD port (5V @ 3A). IC Role / Device Role / Timing Role: Primary power converter generating 3.3V system rail and 1.8V memory interface rail, with PG signal coordinating FPGA configuration and PHY initialization. Use Value: 500 mA buck + 300 mA LDO integration eliminates discrete DC/DC + LDO solution; 300 ms PG delay satisfies USB PD controller reset timing. |
| Industrial Handheld Scanner | Portable Medical Ultrasound Probe |
Use Scenario: Rugged barcode scanner operating across -20°C to +70°C ambient with cold-cranking battery voltage sag. IC Role / Device Role / Timing Role: Sequenced dual-output regulator ensuring image sensor (3.3V) powers up only after FPGA core (1.8V) is stable, with UVLO preventing operation below 2.55V. Use Value: -40°C to +125°C junction rating ensures reliability at extreme temperatures; 137 mV LDO dropout maintains 3.3V output even at 3.45V input during battery sag. | Use Scenario: Battery-operated ultrasound probe requiring low-noise analog supply for ADC front-end and digital supply for beamforming ASIC. IC Role / Device Role / Timing Role: Dual-output PMIC delivering ultra-low-noise 3.3V LDO rail to 16-bit ADC and efficient 1.2V buck rail to ASIC, with PG confirming both rails before initiating scan sequence. Use Value: 1.8 µV/√Hz LDO output noise preserves SNR in 12+ bit medical ADCs; 90%+ buck efficiency minimizes thermal load in sealed probe housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16311-H/ML | Single 600 mA buck + 300 mA LDO; no built-in sequencing; PG monitors buck only | Lacks TC1304-VI0EUN's sequenced startup/shutdown and dual-output PG monitoring | Select when sequencing is handled externally and cost sensitivity outweighs feature set |
| TPS65023RSBR | Triple-output (2 buck + 1 LDO); 2.25 MHz switching; I2C programmable; larger 24-pin QFN | Offers greater flexibility but requires firmware control and occupies 3× larger PCB area | Select when dynamic voltage scaling or additional rail count justifies complexity and size penalty |
Compared with MCP16311-H/ML and TPS65023RSBR, TC1304-VI0EUN uniquely delivers guaranteed output sequencing in a minimal 3×3 mm footprint while maintaining sub-100 µA quiescent current - making it optimal for space-constrained, battery-sensitive applications where deterministic power-up order is mandatory.
Availability
TC1304-VI0EUN is available at Aetrix Electronics and suitable for wearable health monitors, USB-C powered IoT hubs, and industrial handheld scanners requiring stable component supply with full production lifecycle support.
Supply support for TC1304-VI0EUN 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 is a leading provider of microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The TC1303/TC1304 family was designed specifically for portable and battery-powered applications demanding high integration, ultra-low quiescent current, and deterministic power sequencing - targeting cellular phones, handheld medical instruments, and USB-powered devices.
FAQ
What output voltages does the TC1304-VI0EUN provide?
The TC1304-VI0EUN is a fixed-output variant delivering 1.8V from its buck regulator (VOUT1) and 3.3V from its LDO (VOUT2). These values are laser-trimmed at wafer test and do not require external feedback resistors. The 1.8V/3.3V combination is optimized for powering modern low-voltage MCUs and their peripheral interfaces, and is confirmed in Microchip's DS21949C datasheet revision C, page 1.
Does the TC1304-VI0EUN support independent enable control for each output?
No, the TC1304-VI0EUN uses a single SHDN pin to initiate sequenced enable/disable of both outputs - VOUT2 turns on first and off last. This differs from the TC1303 series, which has separate SHDN1 and SHDN2 pins. The sequencing behavior is hardwired and cannot be disabled or reordered; it is a defining feature of the TC1304-VI0EUN part number per DS21949C-page 4 functional block diagram.
What is the thermal performance of the TC1304-VI0EUN in its DFN package?
The TC1304-VI0EUN in the 10-pin 3×3 mm DFN package achieves a typical junction-to-ambient thermal resistance (θJA) of 41°C/W when mounted on a 4-layer PCB with internal ground plane and two thermal vias under the exposed pad. This value assumes the EP pad is soldered to AGND; omitting this connection degrades thermal performance significantly, as noted in DS21949C-page 10.
How does the power-good (PG) function operate on the TC1304-VI0EUN?
The TC1304-VI0EUN's PG pin is an open-drain output that asserts low only after both VOUT1 and VOUT2 reach and sustain ≥94% of their nominal voltages for ≥165 µs. It remains asserted for a minimum of 262 ms (typical) and releases only when either output falls below 92% of nominal. This dual-rail monitoring is exclusive to TC1303C and TC1304 variants, as specified in DS21949C-page 1.
Can the TC1304-VI0EUN operate with input voltage below 2.7V?
No, the absolute minimum input voltage for the TC1304-VI0EUN is 2.7V, as defined in the Absolute Maximum Ratings table (DS21949C-page 7). Operation below this threshold triggers undervoltage lockout (UVLO), disabling both regulators until VIN rises above 2.55V (typical hysteresis point). This ensures stable startup and prevents brown-out conditions in Li-ion battery applications.
TC1304-VI0EUN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 2MHz
- Voltage/Current - Output 1:
- 1.2V, 500mA
- Voltage/Current - Output 2:
- 2.5V, 300mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
TC1304-VI0EUN FAQ
1.How can I place an order for TC1304-VI0EUN through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1304-VI0EUN 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 TC1304-VI0EUN reliable?
The price and inventory of TC1304-VI0EUN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1304-VI0EUN is usually 5 days.
3.What payment methods are accepted for TC1304-VI0EUN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1304-VI0EUN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1304-VI0EUN?
TC1304-VI0EUN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1304-VI0EUN 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 TC1304-VI0EUN?
For technical support, including TC1304-VI0EUN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1304-VI0EUN requirements.
6.How does Aetrix verify that TC1304-VI0EUN is sourced from the original manufacturer or authorized distributors?
All TC1304-VI0EUN 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 TC1304-VI0EUN meets industry standards.
7.What is the process for return or replacement of TC1304-VI0EUN?
All TC1304-VI0EUN units undergo pre-shipment inspection (PSI). If there is an issue with TC1304-VI0EUN, 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 TC1304-VI0EUN part is unused and in its original packaging.
Return procedure for TC1304-VI0EUN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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