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Microchip Technology TC1303B-DG0EMFTR
- Part No.:
- TC1303B-DG0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-DG0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,442
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Product details
Overview
TC1303B-DG0EMFTR 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 specifically tied to the LDO output. It delivers 1.8V/500 mA and 2.5V/300 mA outputs, features 2.0 MHz fixed-frequency PWM operation, 65 µA typical quiescent current, and operates across –40°C to +125°C junction temperature for portable medical instruments and USB-powered devices.
For engineers reviewing the TC1303B-DG0EMFTR datasheet, TC1303B-DG0EMFTR pinout, TC1303B-DG0EMFTR application, or TC1303B-DG0EMFTR equivalent, key selection criteria include LDO-monitored PG functionality, independent shutdown control per rail, 137 mV typical dropout at 200 mA, internal compensation, and DFN-10 package compatibility with space-constrained battery-powered designs.
Technical Context
The TC1303B-DG0EMFTR implements a synchronous buck stage with PFM/PWM auto-transition for light/heavy load efficiency optimization, paired with a standalone LDO output that requires only a 1 µF ceramic capacitor. Its power-good signal is a push-pull output referenced exclusively to VOUT2 regulation, with 94% threshold hysteresis and 300 ms active timeout.
Control logic enables independent enable/disable of buck (SHDN1) and LDO (SHDN2) sections, while UVLO (2.55 V nominal) and thermal shutdown (165°C) protect both regulators. The device uses internal compensation and supports adjustable (0.8–4.5 V) or fixed VOUT1 options; TC1303B-DG0EMFTR is configured for fixed 1.8V buck and 2.5V LDO outputs per Microchip's ordering matrix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA max - supports core voltage rails for ARM Cortex-M microcontrollers or FPGA I/O banks |
| LDO Output Current | 300 mA max - powers analog sensors or communication interfaces without external pass transistor |
| Quiescent Current | 65 µA typical - enables >1-year battery life in always-on wearable health monitors |
| PG Monitoring Target | LDO output only - ensures system reset is asserted only when auxiliary bias rail is valid |
| Switching Frequency | 2.0 MHz ±0.4 MHz - allows use of compact 4.7 µH inductors and reduces EMI filtering burden |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - sustains regulation down to VIN2 = 2.637 V for 2.5V output |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive accessory modules and industrial handhelds |
Pinout & Package
TC1303B-DG0EMFTR is housed in a thermally enhanced 10-pin 3×3 mm DFN package with exposed pad (EP) connected to AGND. Pin 1 is SHDN2; pin 10 is PG. The package supports θJA = 41°C/W on a 4-layer PCB with thermal vias under the EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 (Pin 1) | LDO enable input | Active-high logic (>45% VIN); controls LDO startup/shutdown independently of buck stage |
| VIN2 (Pin 2) | LDO input supply | Accepts 2.7–5.5 V; must be short-traced to VIN1 to minimize noise coupling into LDO reference |
| VOUT2 (Pin 3) | LDO regulated output | Delivers fixed 2.5 V ±2.5%; requires ≥1 µF ceramic capacitor to AGND for stability |
| PG (Pin 4) | Power-good indicator | Push-pull output asserting high when VOUT2 ≥ 94% of 2.5 V; drives processor RESET directly |
| AGND (Pin 5) | Analog ground reference | Must be isolated from PGND plane and connected to EP via dedicated low-inductance trace |
| PGND (Pin 6) | Power ground return | High-current return path for buck switch node; connects to input/output capacitors' ground pads |
| LX (Pin 7) | Buck switch node | Connects to inductor; carries high di/dt switching current - requires tight loop layout with PGND |
| VIN1 (Pin 8) | Buck input supply | Accepts 2.7–5.5 V; shares input source with VIN2 but routed separately to reduce LDO input ripple |
| SHDN1 (Pin 9) | Buck enable input | Active-high logic (>45% VIN); allows sequenced power-up where LDO enables before buck |
| VFB1/VOUT1 (Pin 10) | Buck feedback/output | Fixed 1.8 V output; pin tied internally to output - no external divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow staggered power sequencing - e.g., enable LDO first to bias ADC reference before enabling processor core rail |
| PG tied to LDO output | Ensures system reset remains asserted until auxiliary 2.5 V rail is stable - critical for mixed-signal SoCs requiring clean analog supply before digital boot |
| Internal compensation | Eliminates need for external compensation network - reduces BOM count and layout sensitivity in cost-sensitive portable designs |
| PFM/PWM auto-transition | Maintains >85% efficiency at 1 mA load (PFM) and >90% at 500 mA (PWM) - extends battery runtime across dynamic usage profiles |
| Low-noise LDO output | 1.8 µV/√Hz integrated noise and 62 dB PSRR below 100 Hz - suitable for powering RF transceivers or precision ADCs |
Applications
| USB-Powered Diagnostic Tool | Portable Ultrasound Probe |
|---|---|
Use Scenario: Handheld device powered solely from USB 5 V bus, requiring clean 1.8 V for FPGA logic and 2.5 V for analog front-end amplifiers. IC Role / Device Role / Timing Role: Dual-rail PMIC providing regulated core and analog supplies with LDO-monitored PG ensuring ADC initialization completes before data acquisition. Use Value: 137 mV LDO dropout enables full 2.5 V output even as USB voltage sags to 4.5 V; 65 µA IQ minimizes standby drain during probe sleep mode. | Use Scenario: Battery-operated ultrasound transducer with real-time beamforming, demanding low-noise analog supply and fast transient response. IC Role / Device Role / Timing Role: Primary power controller delivering 1.8 V to digital processing ASIC and 2.5 V to time-gain-control (TGC) amplifier stages, with PG signaling LDO readiness to trigger acquisition timing. Use Value: 1 µF LDO output capacitor meets size constraints; 62 dB PSRR suppresses switching noise from buck stage, preserving SNR in 12-bit ADC path. |
| Wearable ECG Monitor | Industrial Handheld Terminal |
Use Scenario: Coin-cell–powered electrocardiogram sensor requiring ultra-low quiescent current and guaranteed power sequencing during wake-from-sleep. IC Role / Device Role / Timing Role: System PMIC generating processor core (1.8 V) and analog sensor bias (2.5 V) rails, with PG used to gate microcontroller clock enable after LDO stabilization. Use Value: 65 µA total IQ extends 200 mAh coin cell life beyond 18 months in periodic measurement mode; –40°C to +125°C rating covers body-worn thermal cycling. | Use Scenario: Ruggedized field terminal using Li-ion battery (2.7–4.2 V) and needing robust dual-rail supply with thermal protection for extended outdoor operation. IC Role / Device Role / Timing Role: Main power regulator supplying 1.8 V to application processor and 2.5 V to display driver IC, with thermal shutdown (165°C) preventing damage during direct sunlight exposure. Use Value: 10-pin DFN package fits narrow bezel design; 41°C/W θJA enables natural convection cooling without heatsink; UVLO prevents brownout during battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBR | Triple-output (2 buck + 1 LDO), 2.25 MHz switching, 100 µA IQ, QFN-24 package | Supports additional 1.2 V rail for memory I/O; larger footprint and higher IQ limit battery life | Select when third regulated rail is required and board area permits QFN-24; not drop-in due to pin count and PG behavior differences |
| RT8059ZSP | Dual buck (no LDO), 1.5 MHz, 60 µA IQ, WDFN-10 package, PG monitors primary buck only | Lacks LDO output - requires external LDO for analog rails; PG does not reflect auxiliary supply status | Choose for pure digital systems needing two switched rails; unsuitable where LDO-monitored PG is mandatory for analog subsystem readiness |
Compared with TC1303B-DG0EMFTR, TPS65023BRSBR adds a third output but increases complexity and quiescent draw, while RT8059ZSP omits the LDO entirely - making TC1303B-DG0EMFTR uniquely suited for applications requiring guaranteed LDO-supplied analog circuit readiness signaled via push-pull PG.
Availability
TC1303B-DG0EMFTR is available at Aetrix Electronics and suitable for USB-powered diagnostic tools, portable ultrasound probes, and wearable ECG monitors requiring stable component supply across multi-year production cycles.
Supply support for TC1303B-DG0EMFTR 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 industrial, automotive, and consumer applications.
The TC1303 family was designed to deliver highly integrated, low-quiescent-current dual-rail power solutions for space- and battery-constrained portable electronics - with variant-specific PG monitoring to match diverse system-level reset requirements.
FAQ
What output voltages does the TC1303B-DG0EMFTR provide?
The TC1303B-DG0EMFTR provides a fixed 1.8 V output from its synchronous buck regulator and a fixed 2.5 V output from its low-dropout linear regulator. These values are factory-configured and do not require external feedback resistors. The buck output supports up to 500 mA, and the LDO output supports up to 300 mA, with both rails operating from a common 2.7–5.5 V input supply.
How does the power-good (PG) function work on the TC1303B-DG0EMFTR?
The TC1303B-DG0EMFTR features a push-pull power-good output that monitors only the LDO (VOUT2) rail. It asserts high when VOUT2 reaches ≥94% of its nominal 2.5 V value and maintains that state for a guaranteed 262 ms minimum active timeout period. This behavior is specific to the TC1303B variant and differs from TC1303A (buck-monitored) and TC1303C (dual-monitored) versions.
Can the TC1303B-DG0EMFTR operate from a single lithium-ion cell?
Yes, the TC1303B-DG0EMFTR supports input voltages from 2.7 V to 5.5 V, making it compatible with a single Li-ion cell (2.7–4.2 V). At 2.7 V input, the 137 mV typical LDO dropout ensures the 2.5 V output remains regulated down to VIN2 = 2.637 V, and the buck regulator maintains 1.8 V output with adequate headroom across the full discharge curve.
What is the thermal performance of the TC1303B-DG0EMFTR in its DFN package?
In its 3×3 mm DFN package with exposed pad, the TC1303B-DG0EMFTR achieves 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 EP. Thermal shutdown activates at 165°C with 10°C hysteresis, protecting the device during sustained high-load or elevated ambient conditions.
Does the TC1303B-DG0EMFTR require external compensation components?
No, the TC1303B-DG0EMFTR features fully internal compensation for both the buck regulator and LDO sections. This eliminates the need for external RC networks or type-II/III compensators, simplifying layout, reducing BOM count, and improving design robustness - especially in high-volume portable applications where manufacturing variability must be minimized.
TC1303B-DG0EMFTR 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:
- 3V, 500mA
- Voltage/Current - Output 2:
- 2.7V, 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)
TC1303B-DG0EMFTR FAQ
1.How can I place an order for TC1303B-DG0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-DG0EMFTR 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 TC1303B-DG0EMFTR reliable?
The price and inventory of TC1303B-DG0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-DG0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303B-DG0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-DG0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-DG0EMFTR?
TC1303B-DG0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-DG0EMFTR 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 TC1303B-DG0EMFTR?
For technical support, including TC1303B-DG0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-DG0EMFTR requirements.
6.How does Aetrix verify that TC1303B-DG0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303B-DG0EMFTR 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 TC1303B-DG0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303B-DG0EMFTR?
All TC1303B-DG0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-DG0EMFTR, 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 TC1303B-DG0EMFTR part is unused and in its original packaging.
Return procedure for TC1303B-DG0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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