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Microchip Technology TC1303A-ZP0EMFTR
- Part No.:
- TC1303A-ZP0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303A-ZP0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,283
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Product details
Overview
TC1303A-ZP0EMFTR 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 1.2V @ 500 mA and 2.5V @ 300 mA from a 2.7–5.5V input, achieves >90% efficiency at heavy load, and operates across –40°C to +125°C junction temperature for portable medical instruments and USB-powered devices.
For engineers reviewing the TC1303A-ZP0EMFTR datasheet, TC1303A-ZP0EMFTR pinout, TC1303A-ZP0EMFTR application, or TC1303A-ZP0EMFTR equivalent, key selection criteria include buck/LDO independent shutdown control, 65 µA typical quiescent current, 2.0 MHz fixed-frequency PWM operation, 137 mV LDO dropout at 200 mA, and open-drain PG output tied to VOUT1 regulation.
Technical Context
The TC1303A-ZP0EMFTR implements a synchronous buck stage with integrated P- and N-channel MOSFETs (RDS(on) = 450 mΩ each), operating in fixed-frequency PWM mode above ~100 mA and automatically transitioning to PFM at light loads to maintain ultra-low IQ. Its LDO stage uses internal compensation and requires only a 1 µF ceramic output capacitor.
Power-good logic monitors only the buck output (VOUT1) with 94% threshold high, 89% threshold low, 2% hysteresis, and a 300 ms active timeout period-designed specifically for processor reset sequencing. UVLO triggers at 2.55 V (typ) with 200 mV hysteresis, and thermal shutdown activates at 165°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA max - supports core voltage rails for low-power microcontrollers and SoCs |
| LDO Output Current | 300 mA max - powers I/O peripherals, sensors, or RF sections requiring low-noise bias |
| Quiescent Current | 65 µA typical - enables multi-week battery life in always-on portable instrumentation |
| Switching Frequency | 2.0 MHz (1.6–2.4 MHz range) - allows use of compact 4.7 µH inductors and reduces EMI filtering burden |
| LDO Dropout Voltage | 137 mV @ 200 mA - permits operation down to VIN = VOUT2 + 0.137 V, e.g., 2.637 V for 2.5 V output |
| PG Monitoring Target | VOUT1 only - ensures system reset is asserted only when primary processor supply is valid |
| Operating Temp Range | –40°C to +125°C junction - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
TC1303A-ZP0EMFTR is housed in a 10-pin 3×3 mm DFN package with exposed pad (EP) connected to AGND. Pin 11 is the thermal pad; no electrical function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN2 | LDO shutdown control | Active-low logic input; <15% VIN disables LDO, >45% VIN enables it - enables independent power gating |
| 2 VIN2 | LDO input supply | Accepts 2.7–5.5 V; must be short-traced to VIN1 to minimize noise coupling into analog ground |
| 3 VOUT2 | LDO regulated output | Delivers fixed 2.5 V (per ZP0 suffix); requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 PG | Power-good indicator | Open-drain output; pulled low when VOUT1 falls below 94% of nominal - drives external reset line via pull-up |
| 5 AGND | Analog ground reference | Separate ground return for feedback and regulation circuitry; must connect to quiet analog plane, not power ground |
| 6 PGND | Power ground return | High-current return path for buck switch node; ties to AGND only at single point near EP |
| 7 LX | Switch node | Connects to external 4.7 µH inductor; carries high di/dt switching current - requires tight layout and Kelvin connection |
| 8 VIN1 | Buck input supply | Accepts 2.7–5.5 V; shares input source with VIN2; requires local 4.7 µF ceramic decoupling |
| 9 SHDN1 | Buck shutdown control | Active-low logic input; <15% VIN disables buck, >45% VIN enables it - enables independent enable sequencing |
| 10 VFB1/VOUT1 | Buck feedback or output | Configured as VOUT1 (fixed 1.2 V per ZP0 suffix); connects directly to output capacitor - no external divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow staggered enable/disable of buck and LDO outputs - supports flexible power sequencing without external logic |
| Internally compensated regulators | Eliminates need for external compensation components on either regulator - reduces BOM count and layout area |
| Automatic PWM-to-PFM transition | Maintains high efficiency (>85%) down to ~1 mA load without manual mode control - extends battery runtime in sleep states |
| Low-noise LDO output | 1.8 µV/√Hz output noise and 62 dB PSRR at ≤100 Hz - suitable for noise-sensitive analog circuits and ADC references |
| Robust protection suite | Includes undervoltage lockout (2.55 V), overtemperature shutdown (165°C), and short-circuit current limiting (240 mA avg on LDO) - enhances system reliability |
Applications
| USB-Powered Portable Instrument | Handheld Medical Sensor Node |
|---|---|
Use Scenario: Battery-powered glucose meter with MCU, display, and analog front-end running from USB 5 V input. IC Role / Device Role / Timing Role: TC1303A-ZP0EMFTR provides 1.2 V for ARM Cortex-M core and 2.5 V for precision ADC reference and op-amps. Use Value: 65 µA quiescent current extends coin-cell life; 137 mV LDO dropout enables stable 2.5 V output even as battery discharges to 2.64 V. | Use Scenario: Wireless pulse oximeter using BLE SoC and optical sensor array powered by single Li-ion cell. IC Role / Device Role / Timing Role: Delivers regulated 1.2 V for digital logic and 2.5 V for analog signal conditioning, with PG asserting reset if buck rail collapses. Use Value: Open-drain PG output with 300 ms timeout ensures clean processor reset during brown-out - meets IEC 60601-1 safety timing requirements. |
| Industrial Handheld Terminal | Low-Power IoT Edge Controller |
Use Scenario: Ruggedized barcode scanner operating across –25°C to +70°C ambient with wide-input DC adapter. IC Role / Device Role / Timing Role: Generates 1.2 V for application processor and 2.5 V for interface transceivers and EEPROM, with independent shutdown for power states. Use Value: –40°C to +125°C junction rating guarantees operation under extreme environmental stress; 2.0 MHz switching minimizes inductor size for compact mechanical design. | Use Scenario: Battery-operated environmental monitor sampling temperature/humidity every 10 minutes and transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Powers MCU in deep-sleep (1.2 V) and sensor interface (2.5 V) with ultra-low IQ to maximize years of operation on AA cells. Use Value: Automatic PFM mode reduces buck IQ to ~38 µA at light load - cuts average system current by >40% versus fixed-frequency-only regulators. |
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/MS | Single 600 mA buck only; no integrated LDO or PG - requires external LDO and reset supervisor | Suitable where only one regulated rail is needed or LDO requirements are minimal | Select when cost sensitivity outweighs integration benefit and board space allows discrete LDO addition |
| TPS650350RSBR | 3-output PMIC (2 buck + 1 LDO); 2.25 MHz switching; PG monitors all outputs; 75 µA IQ | Supports more complex SoC power trees but lacks independent LDO shutdown control | Prefer when powering multi-rail processors needing tighter coordination between rails |
Compared with MCP16311-H/MS and TPS650350RSBR, TC1303A-ZP0EMFTR uniquely balances dual-rail integration, ultra-low IQ, and independent enable control in a 3×3 mm DFN - making it optimal for space-constrained, battery-sensitive dual-rail systems where LDO independence is critical.
Availability
TC1303A-ZP0EMFTR is available at Aetrix Electronics and suitable for USB-powered devices, handheld medical instruments, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TC1303A-ZP0EMFTR 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, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The TC1303 series targets portable and battery-operated applications demanding high-efficiency dual-rail power conversion with minimal external components and robust thermal/overvoltage protection.
FAQ
What output voltages does the TC1303A-ZP0EMFTR provide?
The TC1303A-ZP0EMFTR provides fixed 1.2 V from its buck regulator (VOUT1) and fixed 2.5 V from its LDO (VOUT2), as indicated by the "ZP0" suffix in the part number. These values are factory-trimmed and require no external feedback resistors - simplifying design and improving accuracy over temperature.
How does the power-good (PG) output behave on the TC1303A-ZP0EMFTR?
The TC1303A-ZP0EMFTR features an open-drain PG output that monitors only the buck regulator output (VOUT1). It asserts low when VOUT1 drops below 94% of nominal and remains low for ≥300 ms after recovery - providing a reliable reset signal for processors. Pull-up is required externally to the desired logic voltage.
Can the TC1303A-ZP0EMFTR operate from a single Li-ion battery?
Yes - the TC1303A-ZP0EMFTR supports input voltages from 2.7 V to 5.5 V, covering the full discharge range of a single Li-ion cell (3.0–4.2 V nominal, down to ~2.8 V cutoff). Its 137 mV LDO dropout ensures stable 2.5 V output even at end-of-discharge, and UVLO prevents erratic operation below 2.55 V.
What is the thermal performance of the TC1303A-ZP0EMFTR in its DFN package?
In the 10-lead 3×3 mm DFN package with exposed pad soldered to AGND, the TC1303A-ZP0EMFTR has a typical θJA of 41°C/W on a 4-layer board. At full 500 mA buck + 300 mA LDO load, junction rise is ~25°C above ambient - well within the +125°C max rating, provided adequate PCB copper area is allocated for heat spreading.
Does the TC1303A-ZP0EMFTR require external compensation components?
No - both the buck regulator and LDO in the TC1303A-ZP0EMFTR are internally compensated. This eliminates external compensation networks, reduces bill-of-materials count, and removes tuning complexity - enabling robust performance across all load and input conditions without design iteration.
TC1303A-ZP0EMFTR 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:
- 1.8V, 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-ZP0EMFTR FAQ
1.How can I place an order for TC1303A-ZP0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303A-ZP0EMFTR 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-ZP0EMFTR reliable?
The price and inventory of TC1303A-ZP0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303A-ZP0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303A-ZP0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303A-ZP0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303A-ZP0EMFTR?
TC1303A-ZP0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303A-ZP0EMFTR 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-ZP0EMFTR?
For technical support, including TC1303A-ZP0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303A-ZP0EMFTR requirements.
6.How does Aetrix verify that TC1303A-ZP0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303A-ZP0EMFTR 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-ZP0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303A-ZP0EMFTR?
All TC1303A-ZP0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303A-ZP0EMFTR, 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-ZP0EMFTR part is unused and in its original packaging.
Return procedure for TC1303A-ZP0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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