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Microchip Technology TC1303B-PF0EMFTR
- Part No.:
- TC1303B-PF0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-PF0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,092
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Product details
Overview
TC1303B-PF0EMFTR 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 LDO output. It delivers fixed 1.8 V on VOUT1 and 3.3 V on VOUT2, operates from 2.7–5.5 V input, features 65 µA typical quiescent current, and supports -40°C to +125°C junction temperature - ideal for portable medical instruments requiring stable dual-rail biasing.
For engineers reviewing the TC1303B-PF0EMFTR datasheet, TC1303B-PF0EMFTR pinout, TC1303B-PF0EMFTR application, or TC1303B-PF0EMFTR equivalent, key selection criteria include LDO-monitored PG functionality, independent shutdown control per rail, 2.0 MHz fixed-frequency PWM operation, 137 mV typical dropout at 200 mA, and compatibility with 1 µF ceramic output capacitors on VOUT2.
Technical Context
The TC1303B-PF0EMFTR implements a synchronous buck regulator with automatic transition between PWM and PFM modes to maintain high efficiency (>90% typical) under heavy and light loads, respectively. Its internal compensation eliminates external loop components. The LDO uses a separate input (VIN2) and provides tight line/load regulation (±0.02%/V and ±0.08%) with low noise (1.8 µV/√Hz).
Power-good logic monitors only the LDO output (VOUT2), asserting a push-pull PG signal when VOUT2 reaches ≥94% of nominal and deasserting below 92%, with 300 ms delay used for processor reset sequencing. UVLO (2.55 V typ), thermal shutdown (165°C), and short-circuit protection are integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output 1 (Buck) | 1.8 V fixed, 500 mA max - supplies core voltage for low-power processors or FPGAs |
| Output 2 (LDO) | 3.3 V fixed, 300 mA max - powers I/O, sensors, or communication interfaces |
| Quiescent Current | 65 µA typical - enables >1-year battery life in always-on portable devices |
| LDO Dropout | 137 mV @ 200 mA - allows operation down to VIN2 = 3.437 V for 3.3 V output |
| Switching Frequency | 2.0 MHz fixed - permits use of compact 4.7 µH inductors and reduces EMI filtering burden |
| Operating Temp | -40°C to +125°C - qualified for industrial and automotive under-hood environments |
| Power-Good Logic | Monitors VOUT2 only, push-pull output, 300 ms delay - directly drives processor RESET with no external timing components |
Pinout & Package
TC1303B-PF0EMFTR is housed in a 10-lead 3×3 mm DFN package with exposed thermal pad (EP), optimized for high thermal performance (θJA = 41°C/W on 4-layer board). Pin 11 (EP) must be soldered to AGND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control | Active-high logic input; enables/disables VOUT2 independently of buck regulator |
| 2 (VIN2) | LDO input supply | Accepts 2.7–5.5 V; must be routed adjacent to VIN1 with minimal trace length |
| 3 (VOUT2) | LDO regulated output | 3.3 V fixed; requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 (PG) | Power-good indicator | Push-pull output asserting high when VOUT2 ≥94% of 3.3 V; drives RESET directly |
| 5 (AGND) | Analog ground reference | Must connect to clean analog ground plane; separates noise-sensitive feedback paths |
| 6 (PGND) | Power ground return | High-current return path for buck switch node; connects to power ground plane |
| 7 (LX) | Buck switch node | Connects to external inductor; requires low-inductance layout to minimize ringing |
| 8 (VIN1) | Buck input supply | Accepts 2.7–5.5 V; shared with VIN2 in most designs |
| 9 (SHDN1) | Buck shutdown control | Active-high logic input; enables/disables VOUT1 independently of LDO |
| 10 (VFB1/VOUT1) | Buck feedback/output | Fixed 1.8 V output; no external divider needed - simplifies layout and BOM |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown per rail | Enables precise power sequencing: LDO can remain active while buck is off (e.g., standby mode) |
| Internally compensated buck | Eliminates need for external compensation network - reduces design risk and board area |
| Low-noise LDO output | 1.8 µV/√Hz output noise - suitable for noise-sensitive analog circuits and ADC references |
| Automatic PWM-to-PFM transition | Maintains >85% efficiency at 1 mA load without manual mode switching or control overhead |
| Integrated protection | UVLO, overtemperature (165°C), and output short-circuit protection - prevents field failures without external circuitry |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Battery-powered glucose meter with microcontroller, display, and analog front-end. IC Role / Device Role / Timing Role: Dual-rail power source delivering 1.8 V for MCU core and 3.3 V for display driver and sensor interface. Use Value: 65 µA quiescent current extends single-CR2032 battery life beyond 18 months; PG output resets MCU if LDO drops during battery sag. | Use Scenario: Handheld oscilloscope powered via USB 5 V bus. IC Role / Device Role / Timing Role: Generates clean 1.8 V for FPGA configuration and 3.3 V for analog acquisition circuitry. Use Value: 2.0 MHz switching frequency avoids USB audio band; 137 mV LDO dropout ensures regulation even as USB voltage sags to 4.4 V. |
| Industrial Handheld Terminals | Wearable Health Monitors |
Use Scenario: Ruggedized barcode scanner operating in cold storage (-20°C) and warehouse heat (+50°C). IC Role / Device Role / Timing Role: Supplies 1.8 V to ARM Cortex-M core and 3.3 V to Bluetooth radio and LCD backlight. Use Value: -40°C to +125°C rating guarantees startup and regulation across ambient extremes; PG delay ensures reliable boot after cold soak. | Use Scenario: Continuous ECG patch with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Provides 1.8 V for digital processing and 3.3 V for precision op-amps and ADC drivers. Use Value: Low 1.8 µV/√Hz LDO noise preserves signal integrity for sub-µV biopotential measurements; 1 µF output cap minimizes footprint. |
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, higher IQ (120 µA), QFN-24 package | Supports additional rail for memory or RF; larger footprint and higher cost | Choose when third regulated output is required and board space allows 4×4 mm QFN |
| RT8059ZSP | Dual buck (no LDO), 1.5 MHz, 300 mA per channel, smaller 2×2 mm DFN, no PG output | Lacks LDO's low-noise, low-dropout capability and power-good signaling | Choose only for purely digital dual-core systems where noise immunity and reset sequencing are not critical |
Compared with TPS65023BRSBR and RT8059ZSP, TC1303B-PF0EMFTR uniquely combines LDO-monitored PG, ultra-low IQ, and 3×3 mm DFN in a cost-optimized dual-rail solution - making it optimal for space-constrained, battery-sensitive applications needing guaranteed reset behavior.
Availability
TC1303B-PF0EMFTR is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply with full lifecycle support.
Supply support for TC1303B-PF0EMFTR 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, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The TC1303 family was designed specifically for portable and battery-operated systems needing efficient, compact dual-voltage regulation with intelligent power monitoring - emphasizing low quiescent current, thermal robustness, and simplified layout.
FAQ
What output voltages does the TC1303B-PF0EMFTR provide?
The TC1303B-PF0EMFTR provides fixed 1.8 V on its buck output (VOUT1) and fixed 3.3 V on its LDO output (VOUT2). These values are factory-trimmed and require no external feedback resistors. The part number suffix "PF0" explicitly denotes this 1.8 V / 3.3 V configuration, confirmed in Microchip's DS21949C datasheet Section 1.0.
How does the power-good (PG) function work on the TC1303B-PF0EMFTR?
The TC1303B-PF0EMFTR's PG pin is a push-pull output that monitors only the LDO output (VOUT2). It asserts high when VOUT2 reaches ≥94% of 3.3 V and deasserts low when VOUT2 falls below 92%, with a built-in 300 ms delay used for processor reset timing. This differs from TC1303A (monitors buck) and TC1303C (monitors both), as specified in DS21949C-page 3.
Can the TC1303B-PF0EMFTR operate from a single 3.7 V Li-ion battery?
Yes - the TC1303B-PF0EMFTR supports input voltages from 2.7 V to 5.5 V, fully covering the 3.0–4.2 V discharge range of a single Li-ion cell. At 3.7 V input, the 137 mV typical dropout ensures stable 3.3 V LDO output even at 200 mA load, and the buck regulator maintains >90% efficiency at 500 mA, as verified in DS21949C-page 12 Figure 2-8.
What is the minimum output capacitance required for the TC1303B-PF0EMFTR's LDO output?
The TC1303B-PF0EMFTR's LDO output (VOUT2) requires a minimum of 1 µF ceramic capacitor connected between VOUT2 and AGND for stability and transient response, as stated in the "Typical Application Circuits" on DS21949C-page 5 and reinforced in Section 3.4 of the datasheet. Larger values (e.g., 2.2 µF) improve load step response but are not mandatory.
Does the TC1303B-PF0EMFTR support independent enable control for each regulator?
Yes - the TC1303B-PF0EMFTR provides two independent shutdown inputs: SHDN1 controls the buck regulator (VOUT1), and SHDN2 controls the LDO (VOUT2). Both are active-high logic inputs with thresholds defined as >45% VIN (high) and <15% VIN (low), enabling flexible power sequencing such as keeping the LDO active during buck sleep mode, per DS21949C-page 19.
TC1303B-PF0EMFTR 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:
- 1.8V, 500mA
- Voltage/Current - Output 2:
- 2.8V, 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)
TC1303B-PF0EMFTR FAQ
1.How can I place an order for TC1303B-PF0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-PF0EMFTR 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-PF0EMFTR reliable?
The price and inventory of TC1303B-PF0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-PF0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303B-PF0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-PF0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-PF0EMFTR?
TC1303B-PF0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-PF0EMFTR 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-PF0EMFTR?
For technical support, including TC1303B-PF0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-PF0EMFTR requirements.
6.How does Aetrix verify that TC1303B-PF0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303B-PF0EMFTR 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-PF0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303B-PF0EMFTR?
All TC1303B-PF0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-PF0EMFTR, 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-PF0EMFTR part is unused and in its original packaging.
Return procedure for TC1303B-PF0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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