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Microchip Technology TC1303B-ZS0EMFTR
- Part No.:
- TC1303B-ZS0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-ZS0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,454
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Product details
Overview
TC1303B-ZS0EMFTR 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 focused on the LDO output. It delivers 1.8V/500 mA and 3.3V/300 mA outputs, operates from 2.7–5.5V input, features 65 µA typical quiescent current, and supports -40°C to +125°C junction temperature - ideal for portable medical instruments and USB-powered devices.
For engineers reviewing the TC1303B-ZS0EMFTR datasheet, TC1303B-ZS0EMFTR pinout, TC1303B-ZS0EMFTR application, or TC1303B-ZS0EMFTR equivalent, key selection criteria include LDO-monitored PG functionality, independent shutdown control for each regulator, 2.0 MHz fixed-frequency PWM operation with automatic PFM transition, 137 mV typical dropout at 200 mA, and compatibility with 1 µF ceramic output capacitors.
Technical Context
The TC1303B-ZS0EMFTR implements a synchronous buck stage with integrated P-channel and N-channel MOSFETs (RDS(on) = 450 mΩ each), fixed 2.0 MHz switching frequency under heavy load, and seamless transition to pulse-frequency modulation (PFM) at light loads to maintain ultra-low quiescent current. Its feedback reference voltage is tightly regulated at 0.8 V ±2.5% over temperature.
The LDO section uses a separate input (VIN2), provides 300 mA output with 137 mV typical dropout at 200 mA, and features ±0.3% output voltage tolerance. The push-pull power-good (PG) output monitors only VOUT2 with 94% threshold high, 89% threshold low, and 300 ms active timeout - distinct from TC1303A (buck-monitored) and TC1303C/TC1304 (dual-monitored).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V) and USB 5 V rails without external pre-regulation |
| Buck Output Current | 500 mA max - sufficient for processor core or FPGA I/O supply in space-constrained portable designs |
| LDO Output Current | 300 mA max - powers auxiliary circuits like sensors or interface ICs with minimal external components |
| Quiescent Current | 65 µA typical - enables >1-year battery life in always-on wearable or medical sensor applications |
| Power-Good Monitoring | Monitors VOUT2 only with 94% threshold and 300 ms timeout - directly enables processor reset sequencing for LDO-supplied logic |
| Dropout Voltage (LDO) | 137 mV typical @ 200 mA - allows operation down to 1.937 V input for 1.8 V output, maximizing battery utilization |
| Switching Frequency | 2.0 MHz fixed (heavy load) - permits use of compact 4.7 µH inductors and reduces EMI filtering footprint |
Pinout & Package
TC1303B-ZS0EMFTR is housed in a 10-lead 3×3 mm DFN package with exposed thermal pad (EP), optimized for thermal performance in high-density portable PCB layouts. Pin 1 is SHDN2; pin 10 is PG. The EP must be connected to AGND for proper thermal dissipation and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 (Pin 1) | LDO shutdown control input | Active-high logic (>45% VIN) enables LDO; independent of buck shutdown - enables flexible power sequencing |
| VIN2 (Pin 2) | LDO input supply | Accepts same input as VIN1 but routed separately; requires local 1 µF bypass capacitor to suppress ripple |
| VOUT2 (Pin 3) | LDO regulated output | Delivers stable 3.3 V (ZS0 variant); requires ≥1 µF ceramic capacitor to AGND for stability and transient response |
| PG (Pin 4) | Power-good status output | Push-pull output asserting high when VOUT2 ≥94% of nominal - directly drives reset inputs without pull-up |
| AGND (Pin 5) | Analog ground reference | Must be tied to quiet analog ground plane; separates noise-sensitive feedback paths from power return currents |
| PGND (Pin 6) | Power ground return | Carries high-frequency buck switch current; must be routed separately from AGND and joined at single point |
| LX (Pin 7) | Buck switch node | Connects to external inductor; carries high di/dt; requires short, wide trace and tight loop with PGND |
| VIN1 (Pin 8) | Buck input supply | Primary input for buck stage; shares source with VIN2 but requires dedicated 4.7 µF input capacitor |
| SHDN1 (Pin 9) | Buck shutdown control input | Active-high logic enabling/disabling buck independently - supports dynamic power gating of core rail |
| VFB1/VOUT1 (Pin 10) | Buck feedback or output | In ZS0 variant: fixed 1.8 V output; connects directly to VOUT1 trace - no external divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow separate enable/disable of buck and LDO - essential for multi-rail power sequencing in portable SoC systems |
| Internally compensated regulators | No external compensation components required for either buck or LDO - reduces BOM count and layout complexity |
| Ultra-low quiescent current | 65 µA total device IQ - extends battery runtime in standby mode without sacrificing startup speed or regulation accuracy |
| Thermal and short-circuit protection | Integrated overtemperature shutdown (165°C) and output short-circuit limiting - ensures robustness in unattended medical or industrial deployments |
| Low-noise LDO output | 1.8 µV/√Hz output noise and 62 dB PSRR at ≤100 Hz - suitable for powering ADC references and RF bias circuits |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Battery-operated glucose monitor with Bluetooth LE connectivity and precision analog front-end. IC Role / Device Role / Timing Role: Dual-rail power source delivering 1.8 V to MCU core and 3.3 V to BLE radio and op-amp signal chain. Use Value: 137 mV LDO dropout maximizes usable battery range; 65 µA quiescent current enables multi-week standby between measurements. | Use Scenario: Handheld oscilloscope module powered via USB 5 V, requiring clean analog supplies and fast wake-up. IC Role / Device Role / Timing Role: Primary power manager generating 1.8 V for FPGA configuration and 3.3 V for ADC drivers and interface logic. Use Value: Push-pull PG output directly resets FPGA on LDO regulation loss; 2.0 MHz switching minimizes inductor size for portable form factor. |
| Industrial Handheld Terminals | Wearable Health Monitors |
Use Scenario: Ruggedized barcode scanner with LCD backlight, imager, and wireless comms operating across -20°C to +70°C ambient. IC Role / Device Role / Timing Role: Dual-output PMIC supplying 1.8 V to ARM Cortex-M4 and 3.3 V to display driver and Wi-Fi transceiver. Use Value: -40°C to +125°C junction rating ensures reliability in cold storage or hot factory environments; independent shutdown enables selective subsystem power-down. | Use Scenario: Continuous ECG patch with 7-day battery life, motion sensing, and BLE telemetry. IC Role / Device Role / Timing Role: Power source for ultra-low-power MCU (1.8 V), analog sensor front-end (3.3 V), and RF transceiver (3.3 V). Use Value: Automatic buck PFM mode at light load cuts IQ below 10 µA during sleep cycles; 1 µF LDO output cap saves board area in thin-profile flex PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16311-H/MS | Single 600 mA buck only; no integrated LDO or PG monitoring - requires external LDO and supervisor IC | Lacks LDO-monitored power-good function and independent shutdown - unsuitable where LDO regulation integrity is critical for system reset | Select only if buck-only supply suffices and board area allows discrete LDO + supervisor solution |
| TPS65023RSBR | Triple-output (2 buck + 1 LDO); 2.25 MHz switching; PG monitors all rails; 100 µA IQ - higher integration but larger 24-pin QFN package | Supports more complex SoC power trees; PG behavior differs (monitors all outputs simultaneously) - may require firmware adaptation | Choose when scaling to multi-core processors needing three regulated rails and tighter system-level fault coverage |
Compared with MCP16311-H/MS and TPS65023RSBR, TC1303B-ZS0EMFTR uniquely combines LDO-specific PG assertion, ultra-low IQ, and minimal 10-pin DFN footprint - making it optimal for cost- and space-sensitive dual-rail portable designs where LDO-supplied logic must be reliably reset.
Availability
TC1303B-ZS0EMFTR is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TC1303B-ZS0EMFTR 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The TC1303 family was designed specifically for space-constrained, battery-powered applications requiring dual independent regulated supplies with intelligent power supervision - emphasizing low IQ, small footprint, and robust thermal performance.
FAQ
What output voltages does the TC1303B-ZS0EMFTR provide?
The TC1303B-ZS0EMFTR is a fixed-output variant delivering 1.8 V from its synchronous buck regulator (VOUT1) and 3.3 V from its low-dropout linear regulator (VOUT2). These values are laser-trimmed at wafer test and specified with ±0.3% tolerance over temperature and line/load conditions - eliminating need for external feedback resistors.
How does the power-good (PG) function work on the TC1303B-ZS0EMFTR?
The TC1303B-ZS0EMFTR's PG pin is a push-pull output that asserts high when VOUT2 reaches and maintains ≥94% of its nominal 3.3 V value, with 300 ms timeout after regulation is lost. Unlike TC1303A (buck-monitored) or TC1303C (dual-monitored), TC1303B-ZS0EMFTR exclusively monitors the LDO output - ensuring reliable reset signaling for peripherals powered by VOUT2.
Can the TC1303B-ZS0EMFTR operate from a single-cell Li-ion battery?
Yes, TC1303B-ZS0EMFTR supports input voltages from 2.7 V to 5.5 V, fully covering the discharge curve of a single-cell Li-ion battery (typically 4.2 V fully charged down to ~2.8 V). Its 137 mV LDO dropout at 200 mA allows sustained 3.3 V output until battery voltage drops below 3.437 V - maximizing usable energy.
What is the thermal performance of the TC1303B-ZS0EMFTR in its DFN package?
The TC1303B-ZS0EMFTR in the 10-lead 3×3 mm DFN 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 vias under the exposed pad. This enables continuous 500 mA buck + 300 mA LDO operation at ambient temperatures up to +85°C without derating - verified per Microchip DS21949C.
Does the TC1303B-ZS0EMFTR require external compensation components?
No, TC1303B-ZS0EMFTR features internally compensated control loops for both the buck regulator and LDO - eliminating external compensation networks. This reduces bill-of-materials cost, simplifies layout, and guarantees stability across all qualified output capacitor types (including 1 µF ceramic for the LDO and 4.7 µF for the buck output).
TC1303B-ZS0EMFTR 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:
- Adj, 500mA
- Voltage/Current - Output 2:
- 1.5V, 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-ZS0EMFTR FAQ
1.How can I place an order for TC1303B-ZS0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-ZS0EMFTR 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-ZS0EMFTR reliable?
The price and inventory of TC1303B-ZS0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-ZS0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303B-ZS0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-ZS0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-ZS0EMFTR?
TC1303B-ZS0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-ZS0EMFTR 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-ZS0EMFTR?
For technical support, including TC1303B-ZS0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-ZS0EMFTR requirements.
6.How does Aetrix verify that TC1303B-ZS0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303B-ZS0EMFTR 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-ZS0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303B-ZS0EMFTR?
All TC1303B-ZS0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-ZS0EMFTR, 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-ZS0EMFTR part is unused and in its original packaging.
Return procedure for TC1303B-ZS0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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