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Microchip Technology TC1313-RD1EMF
- Part No.:
- TC1313-RD1EMF
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1313-RD1EMF.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,471
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Product details
Overview
TC1313-RD1EMF 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 2.0 MHz PWM switching, 57 µA total quiescent current, and -40°C to +125°C operating junction temperature - deployed in portable medical instruments and USB-powered devices.
For engineers reviewing the TC1313-RD1EMF datasheet, TC1313-RD1EMF pinout, TC1313-RD1EMF application, or TC1313-RD1EMF equivalent, key selection criteria include independent shutdown control per rail, 137 mV typical LDO dropout at 200 mA, internal compensation eliminating external loop components, UVLO/overtemperature/short-circuit protection, and compatibility with ceramic output capacitors as small as 1 µF for the LDO.
Technical Context
The TC1313-RD1EMF implements a current-mode synchronous buck regulator with automatic PWM-to-PFM mode transition: fixed 2.0 MHz operation under heavy load (>80 mA typical), dropping to ultra-low-quiescent PFM mode (<38 µA) at light loads. Its integrated N- and P-channel MOSFETs feature 450 mΩ typical RDS(on), enabling >90% efficiency at 500 mA output and 100% duty cycle capability for minimal input–output differential.
The companion LDO operates with no external compensation required, achieves ±0.3% output voltage tolerance, delivers 62 dB PSRR at 100 Hz, and maintains stable regulation with only a 1 µF ceramic output capacitor - its 137 mV dropout at 200 mA enables efficient biasing of auxiliary rails from tightly constrained input sources.
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 PWM mode); automatic transition to PFM at light load for <38 µA IQ |
| Buck Output Range | Adjustable 0.8–4.5 V or standard fixed voltages (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V) |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - enables low-loss auxiliary rail generation from marginal input sources |
| Total Quiescent Current | 57 µA typical - supports extended battery life in always-on portable systems |
| 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 outputs |
Pinout & Package
TC1313-RD1EMF is housed in a thermally enhanced 10-lead 3×3 mm DFN package with exposed pad (EP), optimized for high-power-density DC/DC designs requiring minimal board area and efficient heat dissipation to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 (Pin 1) | LDO enable control input | Logic-high (>45% VIN) enables 300 mA LDO; logic-low (<15% VIN) forces full shutdown with near-zero leakage |
| VIN2 (Pin 2) | LDO input supply | Accepts 2.7–5.5 V input; must be routed with minimal trace length to VIN1 to reduce noise coupling |
| VOUT2 (Pin 3) | LDO regulated output | Delivers fixed 1.5/1.8/2.5/3.3 V; requires ≥1 µF ceramic capacitor to AGND for stability and low noise |
| NC (Pin 4) | No-connect terminal | Not internally bonded; must remain unconnected and unstubbed on PCB |
| AGND (Pin 5) | Analog reference ground | Separate from PGND; connects to quiet analog ground plane and EP for thermal + noise integrity |
| VFB/VOUT1 (Pin 6) | Buck feedback or output node | For adjustable versions: connect voltage divider midpoint; for fixed versions: direct output connection |
| SHDN1 (Pin 7) | Buck enable control input | Independent logic-level control; allows dynamic power sequencing of core and I/O rails |
| VIN1 (Pin 8) | Buck input supply | Accepts 2.7–5.5 V; shares input source with VIN2 but requires tight layout coupling to minimize EMI |
| LX (Pin 9) | Switch-node connection | High-slew, high-current path to external inductor; demands shortest possible trace and solid return to PGND |
| PGND (Pin 10) | Power ground return | Carries high-frequency buck switching current; must be isolated from AGND except at single-point tie |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated buck regulator | Eliminates need for external compensation network - reduces BOM count and layout sensitivity |
| Automatic PWM-to-PFM mode transition | Seamlessly shifts between high-efficiency 2.0 MHz PWM and ultra-low-IQ PFM without external control |
| 1 µF LDO output capacitor support | Enables compact, low-cost filtering using small-case ceramic capacitors - no tantalum or electrolytic required |
| Independent SHDN1/SHDN2 inputs | Permits flexible power sequencing: e.g., hold LDO active while cycling buck for processor wake/sleep |
| Integrated thermal and short-circuit protection | Self-protecting operation prevents damage during overload or ambient temperature excursions up to +125°C |
Applications
| Portable Medical Instrumentation | USB-Powered Peripheral |
|---|---|
|
Use Scenario: Battery-operated glucose meter with microcontroller, LCD, and sensor interface requiring clean 1.8 V core and stable 3.3 V I/O rails. IC Role / Device Role / Timing Role: TC1313-RD1EMF supplies dual regulated outputs: buck powers MCU core at 1.8 V; LDO powers sensors and communication interface at 3.3 V. Use Value: 57 µA total quiescent current extends battery life; 137 mV LDO dropout enables full 3.3 V output even as Li-ion voltage drops to 3.43 V. |
Use Scenario: USB-C powered docking station delivering 5 V bus power plus internal 1.2 V FPGA core and 2.5 V memory rails. IC Role / Device Role / Timing Role: TC1313-RD1EMF generates 1.2 V (buck) and 2.5 V (LDO) from 5 V USB input, with independent shutdown for power-state control. Use Value: 2.0 MHz switching allows use of tiny 4.7 µH inductors; internal compensation avoids tuning effort during layout. |
| Handheld Industrial Scanner | Ultra-Thin Tablet Subsystem |
|
Use Scenario: Rugged barcode scanner with ARM Cortex-M7, CMOS imager, and Bluetooth radio needing low-noise 1.5 V core and 3.3 V analog front-end. IC Role / Device Role / Timing Role: TC1313-RD1EMF provides 1.5 V buck output for CPU and 3.3 V LDO output for image sensor bias and RF transceiver. Use Value: >90% buck efficiency at 500 mA minimizes thermal load in sealed enclosure; 62 dB PSRR suppresses USB noise on analog rail. |
Use Scenario: Fanless tablet with dual-core SoC requiring tightly regulated 0.85 V GPU core and 1.8 V DDR3L interface voltage. IC Role / Device Role / Timing Role: TC1313-RD1EMF configured for adjustable 0.85 V buck output and fixed 1.8 V LDO output from shared 3.8 V battery input. Use Value: Adjustable buck supports precise SoC voltage scaling; 100% duty cycle capability sustains regulation down to 0.95 V input differential. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RGZR | Triple-output PMIC (2 buck + 1 LDO); higher integration but larger 48-pin QFN; 1.2 MHz switching; 85 µA IQ | Targets multi-rail SoC platforms (e.g., OMAP, i.MX); includes I²C programmability and power sequencing logic | Choose when needing >2 rails or digital control; avoid if space-constrained or cost-sensitive - TC1313-RD1EMF offers lower footprint and IQ |
| RT8059ZSP | Dual buck-only regulator (no LDO); 2 MHz switching; 50 µA IQ; 3×3 DFN-10; fixed 1.2/1.8 V outputs only | Suited for dual-core processors with matched voltage requirements; lacks LDO's low-noise, fast-transient auxiliary rail | Choose for pure dual-buck needs with lowest possible IQ; select TC1313-RD1EMF when one rail demands LDO-grade noise rejection and simplicity |
Compared with TPS65023RGZR and RT8059ZSP, TC1313-RD1EMF uniquely balances ultra-low quiescent current, integrated LDO noise immunity, and minimal 10-pin DFN footprint - making it optimal for space- and battery-life-constrained dual-rail portable systems where one rail benefits from linear regulation.
Availability
TC1313-RD1EMF is available at Aetrix Electronics and suitable for cellular phones, handheld medical instruments, and USB-powered peripherals requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TC1313-RD1EMF 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 Flash-IP solutions, emphasizing reliability, longevity, and design-in support for industrial, automotive, and consumer applications.
The TC1313 product line was engineered specifically for portable and battery-powered systems needing highly integrated, low-quiescent dual-rail power conversion - combining switching efficiency with linear-rail simplicity in minimal footprint packages.
FAQ
What output voltage options does the TC1313-RD1EMF support for its buck and LDO regulators?
The TC1313-RD1EMF buck regulator supports either adjustable output (0.8 V to 4.5 V via external resistor divider) or factory-fixed voltages including 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The LDO output is fixed only, with standard options of 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The specific configuration of TC1313-RD1EMF corresponds to a fixed 1.2 V buck output and 3.3 V LDO output, as indicated by the 'RD1' and 'EMF' suffixes in the part number per Microchip's ordering guide.
How does the TC1313-RD1EMF manage power efficiency across varying load conditions?
The TC1313-RD1EMF uses automatic mode transition: under heavy load (>80 mA), it operates in fixed 2.0 MHz PWM mode for >90% efficiency and low ripple; under light load, it seamlessly shifts to PFM mode, reducing total quiescent current to 57 µA typical. The buck regulator's 100% duty cycle capability further preserves efficiency at low input–output differentials, while the LDO maintains 62 dB PSRR to reject input ripple without increasing IQ.
Can the TC1313-RD1EMF operate with ceramic output capacitors smaller than 4.7 µF?
Yes - the LDO output of the TC1313-RD1EMF is fully stable with only a 1 µF ceramic capacitor, as confirmed in the datasheet's typical application circuits and electrical characteristics. The buck regulator recommends 4.7 µF for optimal transient response and ripple suppression, but the LDO's minimal 1 µF requirement significantly reduces solution size and cost compared to legacy LDOs requiring 10–22 µF tantalum capacitors.
What thermal performance can be expected from the TC1313-RD1EMF in a 4-layer PCB design?
In a typical 4-layer board with internal ground plane and two thermal vias under the exposed pad, the TC1313-RD1EMF (DFN package) exhibits a junction-to-ambient thermal resistance (θJA) of 41°C/W. This enables continuous 500 mA buck + 300 mA LDO operation at ambient temperatures up to +85°C without forced airflow, provided input–output differentials remain within recommended limits per the dropout specifications.
Does the TC1313-RD1EMF require external compensation components for stability?
No - both the buck regulator and LDO in the TC1313-RD1EMF are internally compensated. The buck regulator integrates all loop compensation for both adjustable and fixed-output configurations, eliminating external capacitors or resistors. The LDO similarly requires no external components beyond the mandatory 1 µF ceramic output capacitor, simplifying design validation and reducing bill-of-materials count.
TC1313-RD1EMF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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:
- 1.6V, 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-RD1EMF FAQ
1.How can I place an order for TC1313-RD1EMF through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-RD1EMF 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-RD1EMF reliable?
The price and inventory of TC1313-RD1EMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-RD1EMF is usually 5 days.
3.What payment methods are accepted for TC1313-RD1EMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-RD1EMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-RD1EMF?
TC1313-RD1EMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-RD1EMF 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-RD1EMF?
For technical support, including TC1313-RD1EMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-RD1EMF requirements.
6.How does Aetrix verify that TC1313-RD1EMF is sourced from the original manufacturer or authorized distributors?
All TC1313-RD1EMF 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-RD1EMF meets industry standards.
7.What is the process for return or replacement of TC1313-RD1EMF?
All TC1313-RD1EMF units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-RD1EMF, 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-RD1EMF part is unused and in its original packaging.
Return procedure for TC1313-RD1EMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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