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Microchip Technology TC1303C-RD1EMFTR
- Part No.:
- TC1303C-RD1EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303C-RD1EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,556
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Product details
Overview
TC1303C-RD1EMFTR 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 both outputs. It delivers 1.8 V @ 500 mA (buck) and 3.3 V @ 300 mA (LDO) from a 2.7–5.5 V input, features 2.0 MHz fixed-frequency PWM operation, 65 µA typical quiescent current, and operates across –40°C to +125°C junction temperature - used in portable medical instruments and USB-powered devices.
For engineers reviewing the TC1303C-RD1EMFTR datasheet, TC1303C-RD1EMFTR pinout, TC1303C-RD1EMFTR application, or TC1303C-RD1EMFTR equivalent, key selection criteria include independent shutdown control for each regulator, 137 mV LDO dropout at 200 mA, open-drain PG output with 300 ms delay, internal compensation, and compatibility with 1 µF ceramic output capacitors on the LDO rail.
Technical Context
The TC1303C-RD1EMFTR implements a synchronous buck stage with PFM/PWM auto-transition and an independently controlled LDO stage, both internally compensated. Its power-good circuit monitors regulation status of *both* VOUT1 and VOUT2 simultaneously - distinguishing it from TC1303A (buck-only monitor) and TC1303B (LDO-only monitor).
It uses separate shutdown inputs (SHDN1 for buck, SHDN2 for LDO), supports adjustable or fixed-output configurations via VFB1/VOUT1 pin, and integrates UVLO (2.55 V nominal), overtemperature protection (165°C trip), and short-circuit protection on both outputs - all within a thermally enhanced 10-pin 3×3 mm DFN package with exposed pad tied to AGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA max - supports core voltage rails for low-power microcontrollers and FPGAs |
| LDO Output Current | 300 mA max - powers I/O peripherals, sensors, or RF sections requiring low-noise bias |
| Quiescent Current | 65 µA typical - enables >1-year battery life in always-on portable applications |
| LDO Dropout Voltage | 137 mV @ 200 mA - allows operation down to VIN = VOUT + 0.137 V, critical for single-cell Li-ion systems |
| Switching Frequency | 2.0 MHz fixed (typ.) - permits use of compact 4.7 µH inductors and reduces EMI below sensitive bands |
| Power-Good Delay | 300 ms active timeout - provides reliable processor reset timing after power stabilization |
| Operating Temp Range | –40°C to +125°C junction - qualified for industrial and automotive under-hood environments |
Pinout & Package
TC1303C-RD1EMFTR is housed in a thermally optimized 10-lead 3×3 mm DFN package (MFTR suffix) with exposed thermal pad connected to AGND. Pin assignments are validated per DS21949C-page 3 and page 19.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control | Active-high logic input (>45% VIN); enables/disables 300 mA LDO independently of buck stage |
| 2 (VIN2) | LDO input supply | Accepts 2.7–5.5 V input; must be routed adjacent to VIN1 with minimal trace length to reduce noise coupling |
| 3 (VOUT2) | LDO regulated output | Delivers fixed 3.3 V (per RD1 suffix); requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 (PG) | Power-good indicator | Open-drain output asserting when *both* VOUT1 and VOUT2 are within ±6% of target - used for system reset sequencing |
| 5 (AGND) | Analog ground reference | Must connect to dedicated analog ground plane; serves as reference for feedback and PG comparator |
| 6 (PGND) | Power ground return | High-current return path for buck switch node; isolated from AGND except at single-point star connection |
| 7 (LX) | Buck switch node | Connects to external 4.7 µH inductor; carries high di/dt switching current - requires tight layout and ground pour |
| 8 (VIN1) | Buck input supply | Primary input for 500 mA buck stage; shares same source as VIN2 but routed separately for optimal decoupling |
| 9 (SHDN1) | Buck shutdown control | Active-high logic input (>45% VIN); enables/disables buck regulator without affecting LDO state |
| 10 (VFB1/VOUT1) | Buck feedback or output | Configured as VOUT1 (fixed 1.8 V per RD1 suffix); connects directly to 1.8 V rail - no external divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow staged power-up/down of buck and LDO rails - essential for FPGA or multi-core SoC sequencing |
| Both outputs internally compensated | Eliminates need for external compensation networks - reduces BOM count and layout complexity |
| Automatic PWM-to-PFM transition | Maintains >85% efficiency at light loads (<10 mA) while holding quiescent current to 65 µA - extends battery runtime |
| 300 mA LDO with 1 µF capacitor support | Enables ultra-compact output filtering - saves board space versus traditional 10–22 µF tantalum solutions |
| PG monitors both regulators | Single open-drain signal confirms stable operation of *both* 1.8 V and 3.3 V rails before releasing processor reset - improves system reliability |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Battery-operated glucose meter with LCD display and Bluetooth LE radio. IC Role / Device Role / Timing Role: Dual-rail power source delivering 1.8 V to MCU core and 3.3 V to BLE transceiver and display driver. Use Value: 65 µA quiescent current extends coin-cell life beyond 2 years; PG assertion ensures BLE firmware only boots after both rails stabilize. | Use Scenario: Handheld oscilloscope powered solely from USB 5 V bus. IC Role / Device Role / Timing Role: Primary DC/DC converter generating clean 1.8 V analog front-end supply and 3.3 V digital logic rail. Use Value: 2.0 MHz switching avoids interference with 1–10 MHz measurement bandwidth; 137 mV LDO dropout enables full USB voltage range utilization. |
| Industrial Handheld Terminals | Low-Power IoT Edge Nodes |
Use Scenario: Ruggedized barcode scanner operating in cold storage (-20°C) and warehouse heat (+60°C). IC Role / Device Role / Timing Role: Single-chip power solution for ARM Cortex-M4 MCU, imager sensor, and Wi-Fi module. Use Value: –40°C to +125°C rating ensures startup and regulation across ambient extremes; independent SHDN pins enable selective subsystem sleep. | Use Scenario: Battery-powered environmental sensor node transmitting data every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Power manager enabling ultra-low-power deep-sleep mode with fast wake-up (<100 µs) for LDO rail. Use Value: 31 µs LDO wake-up time minimizes active interval; 300 ms PG delay prevents false resets during transient brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1303B-RD1EMFTR | PG monitors LDO output only; identical buck/LDO specs and pinout | Suitable where only LDO rail stability is critical for reset assertion | Select if system reset depends solely on 3.3 V rail integrity and buck rail is non-critical |
| TPS65023RGZR | Triple-output (2 buck + 1 LDO); higher IQ (120 µA); 3 mm × 3 mm QFN package | Supports additional 1.2 V rail for DDR termination; lacks independent LDO shutdown | Choose when third regulated rail is required and 65 µA IQ is not mandatory |
Compared with TC1303B-RD1EMFTR, the TC1303C-RD1EMFTR adds dual-rail PG monitoring - critical for safety-critical systems where both core and I/O supplies must be verified. Versus TPS65023RGZR, it trades one output and higher IQ for tighter shutdown control and lower static power - ideal for long-life battery designs.
Availability
TC1303C-RD1EMFTR is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply, extended temperature operation, and dual-rail power sequencing.
Supply support for TC1303C-RD1EMFTR 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 space-constrained, battery-sensitive portable electronics needing highly integrated dual-rail power conversion with minimal external components and robust thermal performance.
FAQ
What output voltages does the TC1303C-RD1EMFTR provide?
The TC1303C-RD1EMFTR delivers a fixed 1.8 V output from its synchronous buck regulator (VOUT1) and a fixed 3.3 V output from its low-dropout linear regulator (VOUT2), as indicated by the "RD1" suffix in the part number. Both outputs are factory-trimmed to ±0.3% tolerance over temperature and load, and require no external feedback resistors - simplifying design and reducing bill-of-materials cost.
How does the power-good (PG) function operate in the TC1303C-RD1EMFTR?
The TC1303C-RD1EMFTR's PG pin is an open-drain output that asserts low only when *both* VOUT1 and VOUT2 are within 94–96% of their nominal values. It incorporates a 300 ms active timeout period and a 165 µs response delay, making it suitable for processor reset conditioning. This dual-rail monitoring distinguishes TC1303C-RD1EMFTR from TC1303A (buck-only) and TC1303B (LDO-only) variants.
Can the TC1303C-RD1EMFTR operate from a single-cell Li-ion battery?
Yes - the TC1303C-RD1EMFTR supports input voltages from 2.7 V to 5.5 V, fully covering the discharge curve of a single-cell Li-ion (2.8–4.2 V). Its 137 mV LDO dropout at 200 mA and 280 mV buck dropout at 500 mA ensure regulation remains stable even at end-of-discharge, and its 65 µA quiescent current maximizes usable battery capacity.
What is the thermal performance of the TC1303C-RD1EMFTR in its DFN package?
The TC1303C-RD1EMFTR in the 10-lead 3×3 mm DFN (MFTR) package has a typical junction-to-ambient thermal resistance (θJA) of 41°C/W on a 4-layer PCB with internal ground plane and two thermal vias under the exposed pad. This enables continuous 500 mA buck + 300 mA LDO operation at up to +85°C ambient without derating - verified per DS21949C-page 10.
Does the TC1303C-RD1EMFTR require external compensation components?
No - both the buck regulator and LDO in the TC1303C-RD1EMFTR are internally compensated. This eliminates the need for external RC networks or type-II/III compensators, reducing design risk and PCB area. The architecture is optimized for stability with standard 4.7 µH inductors and 1 µF ceramic output capacitors on the LDO rail.
TC1303C-RD1EMFTR 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:
- 1.6V, 500mA
- Voltage/Current - Output 2:
- 3V, 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)
TC1303C-RD1EMFTR FAQ
1.How can I place an order for TC1303C-RD1EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303C-RD1EMFTR 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 TC1303C-RD1EMFTR reliable?
The price and inventory of TC1303C-RD1EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303C-RD1EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303C-RD1EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303C-RD1EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303C-RD1EMFTR?
TC1303C-RD1EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303C-RD1EMFTR 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 TC1303C-RD1EMFTR?
For technical support, including TC1303C-RD1EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303C-RD1EMFTR requirements.
6.How does Aetrix verify that TC1303C-RD1EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303C-RD1EMFTR 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 TC1303C-RD1EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303C-RD1EMFTR?
All TC1303C-RD1EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303C-RD1EMFTR, 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 TC1303C-RD1EMFTR part is unused and in its original packaging.
Return procedure for TC1303C-RD1EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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