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Microchip Technology TC1303A-ZI0EMFTR
- Part No.:
- TC1303A-ZI0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303A-ZI0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,256
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Product details
Overview
TC1303A-ZI0EMFTR 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 power-good monitoring of the buck output only. It delivers 90% typical efficiency at 2.0 MHz switching frequency, features 65 µA total quiescent current, and operates across –40°C to +125°C junction temperature for use in battery-powered portable electronics requiring tightly regulated dual supplies.
For engineers reviewing the TC1303A-ZI0EMFTR datasheet, TC1303A-ZI0EMFTR pinout, TC1303A-ZI0EMFTR application, or TC1303A-ZI0EMFTR equivalent, key selection criteria include buck/LDO output voltage configuration (fixed 1.2V/2.5V for this variant), PG monitoring scope (buck-only), independent shutdown control, thermal/UVLO protection, and DFN-10 package compatibility with space-constrained PCB layouts.
Technical Context
The TC1303A-ZI0EMFTR implements a fixed-frequency PWM buck stage with automatic transition to PFM mode under light load to maintain ultra-low quiescent current, while its LDO uses internal compensation and requires only a 1 µF ceramic output capacitor. The power-good signal is an open-drain output with 300 ms delay, triggered solely by VOUT1 regulation status.
Its architecture separates shutdown control (SHDN1 for buck, SHDN2 for LDO), enables sequenced startup/shutdown only in TC1304 variants, and integrates overtemperature and undervoltage lockout protections on both regulators - with thermal shutdown activating at 165°C and hysteresis of 10°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA maximum - supports core voltage rails for microcontrollers and baseband processors |
| LDO Output Current | 300 mA maximum - powers I/O peripherals, sensors, or RF bias circuits without external pass transistor |
| Quiescent Current | 65 µA typical total - extends battery life in always-on or low-duty-cycle portable devices |
| Switching Frequency | 2.0 MHz fixed (1.6–2.4 MHz range) - enables compact 4.7 µH inductor and low-profile output capacitors |
| PG Monitoring Target | Buck output only (VOUT1) - provides reset signaling aligned with processor core supply stability |
| Operating Temperature | –40°C to +125°C junction - qualified for industrial and extended-temperature embedded applications |
| Dropout Voltage (LDO) | 137 mV typical @ 200 mA - maintains regulation with minimal input headroom, e.g., 2.7V input for 2.5V output |
Pinout & Package
TC1303A-ZI0EMFTR is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), optimized for high-power-density layouts and thermal performance (θJA = 41°C/W on 4-layer board). Pin 11 (EP) must be soldered to AGND for electrical integrity and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control input | Active-low logic input; <15% VIN disables LDO, >45% VIN enables - allows independent LDO sequencing |
| 2 (VIN2) | LDO input supply | Accepts 2.7–5.5V; must be tied closely to VIN1 to minimize noise coupling into analog ground |
| 3 (VOUT2) | LDO regulated output | Fixed 2.5V output (per ZI0 suffix); requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 (PG) | Power-good indicator | Open-drain output asserting when VOUT1 reaches 94% of target; 300 ms delay prevents false resets during transient |
| 5 (AGND) | Analog ground reference | Separate ground node for feedback and regulation circuitry - must connect to clean analog ground plane |
| 6 (PGND) | Power ground return | High-current return path for buck switcher - routed separately from AGND and joined at single point |
| 7 (LX) | Buck switch node | Connects to external inductor; carries high di/dt - requires short, wide trace and local decoupling |
| 8 (VIN1) | Buck input supply | Accepts 2.7–5.5V; shared with VIN2 in most designs to simplify input filtering |
| 9 (SHDN1) | Buck shutdown control input | Active-low logic input; independent of SHDN2 - enables selective buck disable without affecting LDO |
| 10 (VFB1/VOUT1) | Buck feedback or output | Configured as VOUT1 (fixed 1.2V per ZI0 suffix); no external divider needed - simplifies layout |
Key Features
| Feature | Design Value |
|---|---|
| Independent buck/LDO shutdown | Enables flexible power sequencing - e.g., keep LDO active for RTC while shutting down processor core rail |
| Internally compensated regulators | Eliminates need for external compensation networks - reduces BOM count and layout sensitivity |
| 2.0 MHz fixed-frequency PWM | Permits use of small 4.7 µH inductors and low-ESR ceramic capacitors - saves board area vs. lower-frequency alternatives |
| Open-drain PG with 300 ms delay | Provides reliable processor reset timing that accommodates slow-rising buck output during cold start |
| Low dropout LDO (137 mV @ 200 mA) | Supports operation from single-cell Li-ion (2.7V min) while delivering stable 2.5V - avoids need for higher-input buck stage |
Applications
| Cellular Phones | Portable Computers |
|---|---|
Use Scenario: Dual-rail power for application processor (core + I/O) in slim form-factor handsets. IC Role / Device Role / Timing Role: Provides 1.2V core supply via buck and 2.5V I/O supply via LDO; PG asserts only after buck stabilizes to prevent premature boot. Use Value: 65 µA quiescent current extends standby time; 2.0 MHz switching minimizes inductor size for height-constrained modules. | Use Scenario: Powering SoC and peripheral interfaces in fanless tablets and ultrabooks. IC Role / Device Role / Timing Role: Delivers tightly regulated 1.2V/2.5V rails with independent shutdown - enabling dynamic power gating of subsystems. Use Value: 137 mV LDO dropout allows direct Li-ion (3.0–4.2V) input without pre-regulation, reducing component count. |
| USB-Powered Devices | Handheld Medical Instruments |
Use Scenario: Bus-powered diagnostic tools drawing up to 500 mA from 5V USB source. IC Role / Device Role / Timing Role: Steps down 5V USB to 1.2V (buck) and 2.5V (LDO); PG monitors buck rail to ensure safe initialization before USB enumeration. Use Value: 90% buck efficiency minimizes self-heating in sealed enclosures; UVLO prevents erratic behavior during USB plug-in transients. | Use Scenario: Portable ECG or glucose meters requiring clinical-grade supply stability and long battery life. IC Role / Device Role / Timing Role: Supplies precision analog front-end (2.5V LDO) and digital controller (1.2V buck); PG ensures ADC reference is valid before sampling. Use Value: –40°C to +125°C rating supports sterilization cycles and field deployment in variable ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1826S-1202E/DB | Single 600 mA LDO (1.2V fixed), no buck stage or PG output - lacks dual-rail integration | Only suitable where buck conversion is handled externally; no power sequencing or reset signaling capability | Select only if system already includes a separate buck converter and requires only supplemental LDO regulation |
| TPS65023RSBR | Triple-output PMIC (2 buck + 1 LDO), 2.25 MHz switching, but larger 40-pin QFN and higher IQ (120 µA) | Targets more complex processors with multiple voltage domains; over-specified for simple dual-rail needs | Choose when additional rails (e.g., memory, analog) or higher integration justify increased cost and layout area |
Compared with MCP1826S-1202E/DB and TPS65023RSBR, TC1303A-ZI0EMFTR uniquely balances dual-rail integration, ultra-low IQ, and compact DFN packaging - making it optimal for cost- and space-sensitive portable designs needing exactly one buck + one LDO with PG monitoring.
Availability
TC1303A-ZI0EMFTR is available at Aetrix Electronics and suitable for cellular phones, portable computers, and USB-powered devices requiring stable component supply across production lifecycles and seasonal demand spikes.
Supply support for TC1303A-ZI0EMFTR 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs for embedded control applications.
The TC1303 family was designed specifically for portable and battery-operated systems needing highly integrated, low-quiescent-current dual-voltage regulation with robust protection and minimal external components.
FAQ
What output voltages does the TC1303A-ZI0EMFTR provide?
The TC1303A-ZI0EMFTR provides fixed 1.2V on VOUT1 (buck output) and fixed 2.5V on VOUT2 (LDO output), as indicated by the "ZI0" suffix in the part number. These values are factory-trimmed and require no external feedback resistors - simplifying design and improving accuracy over temperature and line variations.
How does the power-good (PG) function operate in the TC1303A-ZI0EMFTR?
The TC1303A-ZI0EMFTR's PG pin is an open-drain output that asserts low only when the buck output (VOUT1) reaches and sustains ≥94% of its nominal 1.2V value, with a built-in 300 ms delay to filter startup transients. It does not monitor the LDO output - confirming this behavior is critical for proper system reset timing in designs using TC1303A-ZI0EMFTR.
Can the TC1303A-ZI0EMFTR operate from a single Li-ion cell?
Yes - the TC1303A-ZI0EMFTR supports input voltages from 2.7V to 5.5V, covering the full discharge range of a single Li-ion cell (typically 3.0V–4.2V). Its 137 mV LDO dropout at 200 mA allows the 2.5V VOUT2 to remain regulated even at end-of-discharge, while the buck stage maintains 1.2V efficiently across the input range.
What package type and thermal characteristics apply to the TC1303A-ZI0EMFTR?
The TC1303A-ZI0EMFTR uses a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), achieving θJA = 41°C/W on a standard 4-layer PCB with internal ground plane and two thermal vias. This enables reliable operation at full load up to +85°C ambient without forced airflow - verified per Microchip's DS21949C thermal characterization.
Does the TC1303A-ZI0EMFTR support independent enable control for each regulator?
Yes - the TC1303A-ZI0EMFTR provides separate shutdown inputs: SHDN1 controls the buck regulator and SHDN2 controls the LDO. Both are active-low logic inputs with defined thresholds (VIH > 45% VIN, VIL < 15% VIN), allowing precise sequencing - for example, enabling the LDO first to power auxiliary circuitry before bringing up the processor core rail via the buck stage.
TC1303A-ZI0EMFTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 2MHz
- Voltage/Current - Output 1:
- Adj, 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-DFN (3x3)
TC1303A-ZI0EMFTR FAQ
1.How can I place an order for TC1303A-ZI0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303A-ZI0EMFTR 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 TC1303A-ZI0EMFTR reliable?
The price and inventory of TC1303A-ZI0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303A-ZI0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303A-ZI0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303A-ZI0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303A-ZI0EMFTR?
TC1303A-ZI0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303A-ZI0EMFTR 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 TC1303A-ZI0EMFTR?
For technical support, including TC1303A-ZI0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303A-ZI0EMFTR requirements.
6.How does Aetrix verify that TC1303A-ZI0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303A-ZI0EMFTR 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 TC1303A-ZI0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303A-ZI0EMFTR?
All TC1303A-ZI0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303A-ZI0EMFTR, 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 TC1303A-ZI0EMFTR part is unused and in its original packaging.
Return procedure for TC1303A-ZI0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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