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Microchip Technology TC1313-RD1EMFTR
- Part No.:
- TC1313-RD1EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1313-RD1EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,759
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Product details
Overview
TC1313-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) in a single 10-pin DFN package. It delivers adjustable (0.8–4.5 V) or fixed (e.g., 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V) buck output and fixed LDO outputs (1.5 V, 1.8 V, 2.5 V, 3.3 V), with total quiescent current of 57 µA typical and operation from –40°C to +125°C junction temperature - used in portable medical instruments and USB-powered devices.
For engineers reviewing the TC1313-RD1EMFTR datasheet, TC1313-RD1EMFTR pinout, TC1313-RD1EMFTR application, or TC1313-RD1EMFTR equivalent, key selection criteria include independent shutdown control per rail, 2.0 MHz fixed-frequency PWM mode with automatic PFM transition at light load, 137 mV typical LDO dropout at 200 mA, internal compensation for both regulators, and UVLO/overtemperature/short-circuit protection.
Technical Context
The TC1313-RD1EMFTR implements a current-mode synchronous buck regulator with integrated P- and N-channel MOSFETs (RDS(on) = 450 mΩ each), operating at 2.0 MHz (1.6–2.4 MHz range) under heavy load and transitioning automatically to low-quiescent PFM mode below ~30 mA load. Its feedback reference is 0.8 V ±2.5% with ±0.3% output tolerance over temperature.
The LDO section uses a PMOS pass element with 137 mV typical dropout at 200 mA and 205 mV at 300 mA, supports 1 µF ceramic output capacitance only, and provides 62 dB PSRR at 100 Hz. Both regulators share independent logic-level shutdown inputs (SHDN1/SHDN2) with 15% VIN low threshold and 45% VIN high threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual-rail: 500 mA synchronous buck + 300 mA LDO, independently controllable |
| Buck Switching Frequency | 2.0 MHz fixed (1.6–2.4 MHz range); enables compact 4.7 µH inductor and low-noise design |
| Total Quiescent Current | 57 µA typical; critical for battery runtime in standby and light-load states |
| LDO Dropout Voltage | 137 mV typical @ 200 mA; allows efficient operation with minimal input–output differential |
| Operating Junction Temp | –40°C to +125°C; qualified for industrial and automotive-adjacent embedded applications |
| Protection Features | UVLO (2.55 V nominal), thermal shutdown (165°C), short-circuit and overcurrent on both rails |
| Package | 10-pin 3×3 mm DFN with exposed thermal pad (EP); θJA = 41°C/W on 4-layer board |
Pinout & Package
TC1313-RD1EMFTR is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), requiring connection to AGND via multiple vias for thermal performance and noise control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN2 | LDO shutdown control input | Active-high logic input; >45% VIN enables LDO, <15% VIN disables it with fast wake-up (31 µs) |
| 2 VIN2 | LDO input supply | Accepts same input as VIN1 (2.7–5.5 V); must be routed with minimal trace length to VIN1 |
| 3 VOUT2 | LDO regulated output | Fixed-voltage output (e.g., 1.5 V/1.8 V/2.5 V/3.3 V); requires ≥1 µF ceramic capacitor to AGND |
| 4 NC | No connect | Not internally bonded; must remain unconnected on PCB |
| 5 AGND | Analog ground reference | Reference for feedback and LDO circuitry; separate from PGND to minimize noise coupling |
| 6 VFB/VOUT1 | Buck feedback or output sense | Connect to voltage divider midpoint for adjustable output; direct VOUT1 connection for fixed versions |
| 7 SHDN1 | Buck shutdown control input | Active-high logic input; independent enable/disable of buck stage without affecting LDO |
| 8 VIN1 | Buck input supply | Main input (2.7–5.5 V); shared with VIN2; feeds synchronous buck switch node (LX) |
| 9 LX | Buck switch node | High-current switching node connected directly to inductor; demands short, low-inductance routing |
| 10 PGND | Power ground return | Return path for buck inductor current and internal switch losses; must be low-impedance and separated from AGND |
| EP | Exposed thermal pad | Electrically tied to AGND; mandatory connection via ≥4 thermal vias to inner AGND plane for thermal reliability |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | Separate SHDN1 and SHDN2 pins allow selective power gating of buck and LDO rails to optimize system-level power sequencing |
| Automatic PWM-to-PFM mode transition | Eliminates need for external mode-select circuitry; maintains regulation while reducing IQ to ≤38 µA in light-load conditions |
| Internally compensated regulators | Removes requirement for external compensation components - reduces BOM count and layout complexity for both buck and LDO |
| Low-noise LDO output | 1.8 µV/√Hz output noise and 62 dB PSRR at 100 Hz support noise-sensitive analog or RF subsystems powered by VOUT2 |
| Robust protection suite | Integrated UVLO, thermal shutdown (165°C), and overcurrent protection on both outputs prevent damage during fault conditions |
Applications
| Portable Medical Instrumentation | USB-Powered Peripheral |
|---|---|
Use Scenario: Handheld glucose meter or pulse oximeter operating from single Li-ion cell (2.7–4.2 V) with microcontroller core and analog sensor front-end. IC Role / Device Role / Timing Role: TC1313-RD1EMFTR supplies 1.8 V (buck) to MCU core and 3.3 V (LDO) to ADC/sensor interface, enabling dual-rail operation from one input source. Use Value: 137 mV LDO dropout preserves battery life at end-of-discharge; 57 µA total IQ extends standby time between measurements. |
Use Scenario: USB bus-powered docking station with FPGA, USB transceiver, and LED indicators. IC Role / Device Role / Timing Role: TC1313-RD1EMFTR generates 1.2 V (buck) for FPGA core logic and 3.3 V (LDO) for USB PHY and I/O banks. Use Value: 2.0 MHz switching frequency allows use of small 4.7 µH inductor; internal compensation eliminates tuning effort. |
| Industrial Handheld Terminal | Ultra-Low-Power Sensor Node |
Use Scenario: Ruggedized barcode scanner with ARM Cortex-M processor, display driver, and wireless module. IC Role / Device Role / Timing Role: TC1313-RD1EMFTR delivers 1.5 V (buck) to processor and 2.5 V (LDO) to display controller, supporting wide input range (2.7–5.5 V). Use Value: –40°C to +125°C junction rating ensures reliability in outdoor or factory-floor environments; UVLO prevents brownout resets. |
Use Scenario: Battery-operated environmental sensor node transmitting data via BLE, requiring long-term operation on coin cell. IC Role / Device Role / Timing Role: TC1313-RD1EMFTR powers 3.3 V (LDO) radio and 1.8 V (buck) microcontroller, with independent shutdown to isolate unused rails. Use Value: Automatic PFM mode reduces IQ to 38 µA (buck) and 44 µA (LDO) during sleep, maximizing years of operation on primary battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple-output (2 buck + 1 LDO), higher IQ (100 µA), 2.25 MHz switching, QFN-24 package | Supports more complex SoC power trees; larger footprint and higher cost than TC1313-RD1EMFTR | Choose when needing third rail or tighter output tolerance (±1% vs ±2.5%) |
| RT8059ZSP | Dual buck only (no LDO), 600 mA/600 mA, 3 MHz, WDFN-10, no independent shutdown | Lacks auxiliary LDO rail; requires external LDO for bias voltage generation | Choose when both rails demand switching efficiency and size constraints permit discrete LDO addition |
Compared with TPS65023RSBR and RT8059ZSP, TC1313-RD1EMFTR uniquely balances ultra-low IQ, integrated LDO simplicity, and compact DFN packaging - making it optimal for space-constrained, battery-sensitive dual-rail systems where third-rail capability or sub-1% tolerance is unnecessary.
Availability
TC1313-RD1EMFTR is available at Aetrix Electronics and suitable for portable medical instrumentation, USB-powered peripherals, and industrial handheld terminals requiring stable component supply across extended temperature and long-lifecycle production programs.
Supply support for TC1313-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 leading provider of microcontrollers, analog, and mixed-signal semiconductors, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The TC1313 product line was designed specifically for cost-sensitive, space-constrained portable electronics requiring dual regulated rails - emphasizing integration, low quiescent current, and robust protection without external compensation.
FAQ
What input voltage range does the TC1313-RD1EMFTR support?
The TC1313-RD1EMFTR supports an input voltage range of 2.7 V to 5.5 V on both VIN1 and VIN2 pins. This range accommodates single-cell Li-ion (2.7–4.2 V) and USB 5 V sources. The device incorporates undervoltage lockout (UVLO) that activates at 2.55 V nominal to prevent erratic operation during brownout conditions.
Can the TC1313-RD1EMFTR generate adjustable buck output voltages?
Yes, the TC1313-RD1EMFTR supports adjustable buck output voltages from 0.8 V to 4.5 V using an external resistor divider connected to the VFB/VOUT1 pin. Its internal feedback reference is 0.8 V ±2.5%, and output tolerance remains ±2.5% over temperature and line/load conditions for adjustable configurations.
How does the TC1313-RD1EMFTR manage efficiency at light loads?
The TC1313-RD1EMFTR automatically transitions its buck regulator from fixed-frequency PWM mode (2.0 MHz) to pulse-frequency modulation (PFM) mode when load drops below ~30 mA. This reduces total quiescent current to 57 µA typical, with buck-only IQ dropping to 38 µA - preserving battery life in standby or intermittent-use applications.
What is the minimum output capacitance required for the LDO output (VOUT2)?
The TC1313-RD1EMFTR LDO output (VOUT2) requires a minimum of 1 µF ceramic capacitor connected between VOUT2 and AGND for stability and transient response. The datasheet confirms stability with X5R/X7R dielectrics and specifies no ESR requirements - simplifying capacitor selection and reducing bill-of-materials cost.
Does the TC1313-RD1EMFTR require external compensation components?
No, the TC1313-RD1EMFTR features fully internal compensation for both the synchronous buck regulator and the LDO. This eliminates the need for external RC networks or type-II/type-III compensators, reducing design cycle time, PCB area, and component count - especially valuable in compact portable designs.
TC1313-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:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
TC1313-RD1EMFTR FAQ
1.How can I place an order for TC1313-RD1EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-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 TC1313-RD1EMFTR reliable?
The price and inventory of TC1313-RD1EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-RD1EMFTR is usually 5 days.
3.What payment methods are accepted for TC1313-RD1EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-RD1EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-RD1EMFTR?
TC1313-RD1EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-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 TC1313-RD1EMFTR?
For technical support, including TC1313-RD1EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-RD1EMFTR requirements.
6.How does Aetrix verify that TC1313-RD1EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1313-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 TC1313-RD1EMFTR meets industry standards.
7.What is the process for return or replacement of TC1313-RD1EMFTR?
All TC1313-RD1EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-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 TC1313-RD1EMFTR part is unused and in its original packaging.
Return procedure for TC1313-RD1EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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