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Microchip Technology TC1303B-PD0EMF
- Part No.:
- TC1303B-PD0EMF
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-PD0EMF.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
TC1303B-PD0EMF 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 only. It delivers 1.8 V at 500 mA (buck) and 3.3 V at 300 mA (LDO), operates from 2.7–5.5 V input, features 65 µA typical quiescent current, and uses a 2.0 MHz fixed-frequency PWM switching architecture. It is designed for portable battery-powered systems requiring tightly regulated dual-rail supplies.
For engineers reviewing the TC1303B-PD0EMF datasheet, TC1303B-PD0EMF pinout, TC1303B-PD0EMF application, or TC1303B-PD0EMF equivalent, key selection criteria include LDO-monitored PG behavior, independent shutdown control per rail, 137 mV typical dropout at 200 mA, internal compensation, and operation across –40°C to +125°C junction temperature.
Technical Context
The TC1303B-PD0EMF implements a synchronous buck converter with automatic transition between PWM (heavy load) and PFM (light load) modes to maintain high efficiency and ultra-low quiescent current. Its LDO stage is internally compensated and requires only a single 1 µF ceramic output capacitor.
Power-good logic is configured as a push-pull output monitoring only VOUT2 regulation (per TC1303B variant), with 94% VOUT2 threshold high, 89% threshold low, and 300 ms active timeout period - optimized for processor reset sequencing in portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA max - supports core voltage rails for microcontrollers and SoCs |
| LDO Output Current | 300 mA max - powers I/O peripherals, sensors, or RF sections independently |
| Quiescent Current | 65 µA typical - enables >10-year battery life in always-on standby applications |
| Switching Frequency | 2.0 MHz fixed - allows use of small 4.7 µH inductors and compact PCB layout |
| LDO Dropout Voltage | 137 mV @ 200 mA - sustains regulation down to VIN = VOUT + 0.137 V, critical for Li-ion discharge |
| PG Monitoring Target | LDO output only - ensures system reset triggers only when auxiliary rail is stable |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin and industrial edge environments |
Pinout & Package
TC1303B-PD0EMF is housed in a 10-lead 3×3 mm DFN package with exposed thermal pad (EP), pin-compatible with MSOP-10. AGND and PGND are separate ground pins for optimal noise isolation between analog and power domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN2 | LDO shutdown control | Active-high logic input (>45% VIN); enables independent LDO disable without affecting buck stage |
| 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 | Delivers fixed 3.3 V; requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 PG | Power-good indicator | Push-pull output asserting high when VOUT2 ≥ 94% of nominal; used for processor RESET |
| 5 AGND | Analog reference ground | Reference node for feedback circuitry; must connect to quiet analog ground plane |
| 6 PGND | Power ground return | High-current return path for buck switch node; ties to power ground plane under EP |
| 7 LX | Switch node | Connects to external inductor; carries high di/dt buck switching current |
| 8 VIN1 | Buck input supply | Main input (2.7–5.5 V); shared with VIN2; requires local 4.7 µF ceramic decoupling |
| 9 SHDN1 | Buck shutdown control | Active-high logic input (>45% VIN); enables independent buck disable |
| 10 VFB1/VOUT1 | Buck feedback or output | Configured as VOUT1 (fixed 1.8 V); no external divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow staged power-up/down of buck and LDO rails - essential for FPGA or multi-core SoC sequencing |
| Internally compensated LDO | Eliminates need for external compensation network; reduces BOM count and layout sensitivity |
| Push-pull PG output | Drives RESET directly without pull-up resistor - simplifies interface to processors with active-low reset inputs |
| Ultra-low IQ buck + LDO | 65 µA total quiescent current enables maintenance of real-time clock and memory retention during deep sleep |
| Thermal & short-circuit protection | 165°C thermal shutdown with 10°C hysteresis and cycle-by-cycle current limiting prevent damage during fault conditions |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Handheld blood glucose meter operating from single-cell Li-ion battery with Bluetooth LE connectivity. 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 sensor interface. Use Value: 137 mV LDO dropout extends usable battery range by ~15 minutes at end-of-discharge; PG signal synchronizes BLE wake-up with rail stability. | Use Scenario: Portable oscilloscope module powered via USB 2.0 (5 V) with analog front-end and ARM Cortex-M7 host. IC Role / Device Role / Timing Role: Primary power conditioner generating clean 1.8 V digital core and 3.3 V analog/IO supplies from noisy USB bus. Use Value: 2.0 MHz switching minimizes conducted EMI into sensitive analog signal paths; internal compensation avoids layout-dependent instability. |
| Industrial Handheld Terminals | Low-Power IoT Edge Nodes |
Use Scenario: Ruggedized barcode scanner with display, imager, and cellular modem operating across –25°C to +70°C ambient. IC Role / Device Role / Timing Role: Single-chip dual-output regulator managing power sequencing between application processor (1.8 V) and modem/LCD (3.3 V). Use Value: –40°C to +125°C junction rating ensures reliability in uncontrolled thermal environments; independent SHDN pins enable modem-only wake-up. | Use Scenario: Battery-operated environmental sensor node transmitting data hourly via LoRaWAN. IC Role / Device Role / Timing Role: Always-on power manager supplying 1.8 V to ultra-low-power MCU and 3.3 V to LoRa transceiver during transmit bursts. Use Value: 65 µA total IQ extends 2000 mAh Li-SOCl₂ battery life beyond 10 years; PG output validates LDO before enabling radio transmission. |
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 - requires external LDO and monitoring circuit | Suitable where only one regulated rail is needed or LDO requirements differ significantly | Select when design requires higher buck current (600 mA) and LDO can be implemented separately |
| TPS650350RGER | 3-channel PMIC (2 buck + 1 LDO); 2.25 MHz switching; PG monitors buck1 only; different pinout and enable logic | Targeted at OMAP/AM335x-based designs with tighter space constraints and higher integration needs | Choose when scaling to multi-rail SoC platforms and requiring additional power domain flexibility |
Compared with MCP16311-H/MS and TPS650350RGER, TC1303B-PD0EMF uniquely combines LDO-monitored PG, independent shutdown, and ultra-low IQ in a 10-pin DFN - making it optimal for cost-sensitive, battery-constrained dual-rail applications where LDO supervision is mandatory.
Availability
TC1303B-PD0EMF is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply with guaranteed long-term availability.
Supply support for TC1303B-PD0EMF 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 is engineered as a highly integrated dual-output power management solution targeting portable, battery-operated devices that require independent regulation, low quiescent current, and precise power sequencing - especially where LDO rail integrity must be verified before system wake-up.
FAQ
What output voltages does the TC1303B-PD0EMF provide?
The TC1303B-PD0EMF provides fixed 1.8 V from its synchronous buck regulator (VOUT1) and fixed 3.3 V from its low-dropout linear regulator (VOUT2). These values are factory-programmed and do not require external feedback resistors. The device datasheet confirms these outputs are standard for the TC1303B variant, with ±0.3% tolerance over temperature and load.
How does the power-good (PG) function operate on the TC1303B-PD0EMF?
The TC1303B-PD0EMF's PG pin is a push-pull output that monitors only the LDO output (VOUT2). It asserts high when VOUT2 reaches ≥94% of nominal (3.102 V for 3.3 V output) and remains active for a 300 ms timeout period. This behavior is specific to the TC1303B variant, distinguishing it from TC1303A (monitors buck) and TC1303C (monitors both).
Can the TC1303B-PD0EMF be used with a single input source for both regulators?
Yes - the TC1303B-PD0EMF is designed for shared input operation: VIN1 and VIN2 must be connected together with short, low-inductance traces. The datasheet specifies that both inputs accept 2.7–5.5 V and are intended to be supplied from the same source, such as a Li-ion battery or USB port, simplifying board-level power routing.
What thermal performance can be expected from the TC1303B-PD0EMF in a DFN package?
In the 10-lead 3×3 mm DFN package, the TC1303B-PD0EMF 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 full 500 mA buck + 300 mA LDO operation up to +85°C ambient without derating, provided the EP is soldered to AGND.
Does the TC1303B-PD0EMF require external compensation components?
No - both the buck regulator and LDO in the TC1303B-PD0EMF are internally compensated. The buck stage uses a fixed-frequency 2.0 MHz PWM controller with integrated loop compensation, and the LDO requires only a single 1 µF ceramic output capacitor on VOUT2. No external RC networks or compensation pins are needed, reducing design complexity and footprint.
TC1303B-PD0EMF 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:
- 1.8V, 500mA
- Voltage/Current - Output 2:
- 3V, 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-PD0EMF FAQ
1.How can I place an order for TC1303B-PD0EMF through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-PD0EMF 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-PD0EMF reliable?
The price and inventory of TC1303B-PD0EMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-PD0EMF is usually 5 days.
3.What payment methods are accepted for TC1303B-PD0EMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-PD0EMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-PD0EMF?
TC1303B-PD0EMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-PD0EMF 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-PD0EMF?
For technical support, including TC1303B-PD0EMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-PD0EMF requirements.
6.How does Aetrix verify that TC1303B-PD0EMF is sourced from the original manufacturer or authorized distributors?
All TC1303B-PD0EMF 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-PD0EMF meets industry standards.
7.What is the process for return or replacement of TC1303B-PD0EMF?
All TC1303B-PD0EMF units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-PD0EMF, 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-PD0EMF part is unused and in its original packaging.
Return procedure for TC1303B-PD0EMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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