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Microchip Technology TC1303B-PG0EMFTR
- Part No.:
- TC1303B-PG0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-PG0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,117
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Product details
Overview
TC1303B-PG0EMFTR 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 of the LDO output (VOUT2). It delivers 94% regulation threshold accuracy, 137 mV typical dropout at 200 mA, and operates across -40°C to +125°C junction temperature. Used in portable medical instruments and USB-powered devices requiring tightly regulated dual-rail supplies.
For engineers reviewing the TC1303B-PG0EMFTR datasheet, TC1303B-PG0EMFTR pinout, TC1303B-PG0EMFTR application, or TC1303B-PG0EMFTR equivalent, key selection criteria include LDO-monitored PG behavior, independent shutdown control (SHDN1/SHDN2), 2.0 MHz fixed-frequency PWM operation, 65 µA typical quiescent current, and DFN-10 package compatibility with thermal pad grounding.
Technical Context
The TC1303B-PG0EMFTR implements a synchronous buck stage with PFM/PWM auto-transition for light-load efficiency, paired with an internally compensated LDO requiring only a 1 µF ceramic output capacitor. Its power-good circuit monitors VOUT2 exclusively and asserts a push-pull PG signal after 300 ms delay when VOUT2 reaches ≥94% of nominal value.
Shutdown logic is fully independent: SHDN1 controls the buck regulator only, while SHDN2 controls the LDO only. The device features undervoltage lockout (2.55 V typical), overtemperature protection (165°C trip), and short-circuit protection on both outputs - all without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA maximum - supports processor core rails with minimal external components |
| LDO Output Current | 300 mA maximum - powers I/O, memory, or analog peripherals with low noise |
| PG Monitoring Target | VOUT2 only - enables reliable reset sequencing for systems where LDO rail integrity is critical |
| Quiescent Current | 65 µA typical - extends battery life in always-on portable applications |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - allows operation from low-input sources like single-cell Li-ion (2.7–5.5 V) |
| Switching Frequency | 2.0 MHz fixed - permits use of small 4.7 µH inductors and compact 3×3 mm DFN layout |
| Operating Junction Temp | -40°C to +125°C - qualified for industrial and automotive-adjacent embedded environments |
Pinout & Package
TC1303B-PG0EMFTR is housed in a thermally enhanced 10-pin 3×3 mm DFN package with exposed thermal pad (EP) connected to AGND. Pin 1 is marked by a dot; the EP must be soldered to a dedicated AGND copper area for thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown input | Active-high logic input (>45% VIN); enables/disables VOUT2 independently of buck stage |
| 2 (VIN2) | LDO input supply | Accepts same 2.7–5.5 V input as VIN1; requires low-ESR decoupling near pin |
| 3 (VOUT2) | LDO regulated output | Delivers fixed 3.3 V (per PG0E suffix); requires ≥1 µF ceramic capacitor to AGND |
| 4 (PG) | Power-good output | Push-pull active-high signal indicating VOUT2 ≥94% of nominal; no external pull-up needed |
| 5 (AGND) | Analog ground reference | Must connect to quiet analog ground plane; separate from PGND except at single point |
| 6 (PGND) | Power ground return | High-current return path for buck switch node; routed separately from AGND to minimize noise |
| 7 (LX) | Buck switch node | Connects to inductor; carries high di/dt switching current - keep trace short and wide |
| 8 (VIN1) | Buck input supply | Primary input for synchronous buck stage; tied to VIN2 on PCB per datasheet recommendation |
| 9 (SHDN1) | Buck shutdown input | Active-high logic input (>45% VIN); enables/disables VOUT1 independently of LDO |
| 10 (VFB1/VOUT1) | Buck feedback/output | Configured as VOUT1 (fixed 1.8 V per PG0E suffix); not adjustable in this variant |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual shutdown | SHDN1 and SHDN2 allow staggered power-up/down of buck and LDO rails without external logic |
| LDO-monitored power-good | PG asserts only when VOUT2 is stable - critical for systems where bias rail integrity precedes core activation |
| Internally compensated LDO | Eliminates need for external compensation network; reduces BOM count and layout sensitivity |
| 2.0 MHz PWM + PFM transition | Maintains >90% efficiency at heavy load and ultra-low IQ (<65 µA) at light load - ideal for burst-mode systems |
| Thermal & fault protection | Integrated overtemperature (165°C), UVLO (2.55 V), and short-circuit protection - no external sensing required |
Applications
| USB-Powered Portable Instrument | Handheld Medical Device |
|---|---|
Use Scenario: Battery-powered glucose meter with microcontroller, LCD, and sensor interface. IC Role / Device Role / Timing Role: Dual-rail power source: 1.8 V for MCU core, 3.3 V for display driver and analog front-end. Use Value: Independent SHDN2 enables software-controlled shutdown of display rail only, preserving MCU state during idle. |
Use Scenario: Portable ECG monitor operating from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary PMIC delivering regulated 1.8 V (core) and 3.3 V (ADC, op-amps, comms) with precise reset timing. Use Value: PG assertion after 300 ms delay ensures ADC reference and analog circuitry stabilize before data acquisition begins. |
| Low-Power Industrial Sensor Node | Embedded USB-C Peripheral |
Use Scenario: Wireless temperature/humidity sensor node with BLE SoC and precision analog sensors. IC Role / Device Role / Timing Role: Efficient dual-output regulator supporting 1.8 V digital domain and 3.3 V analog/RF domain. Use Value: 137 mV LDO dropout enables full 3.3 V output down to 3.43 V input - maximizes usable battery voltage range. |
Use Scenario: USB-C powered docking accessory with HDMI, USB 2.0, and PD controller. IC Role / Device Role / Timing Role: Secondary power manager deriving 1.8 V and 3.3 V from 5 V USB-C bus. Use Value: Push-pull PG output directly drives reset line of PD controller without pull-up resistor - simplifies USB-C compliance design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1303A-PG0EMFTR | PG monitors buck output (VOUT1), not LDO; open-drain PG output requires external pull-up | Suitable when system reset depends on core rail stability rather than peripheral rail | Select when primary regulation target is the buck output and board space allows pull-up resistor |
| TC1303C-PG0EMFTR | PG monitors both VOUT1 and VOUT2 simultaneously; open-drain PG output | Required when system demands joint validation of both rails before release from reset | Choose when safety-critical sequencing mandates confirmation of both power domains |
Compared with TC1303A-PG0EMFTR and TC1303C-PG0EMFTR, the TC1303B-PG0EMFTR uniquely provides LDO-only monitoring with push-pull PG - eliminating external components while enabling precise peripheral-rail-first startup sequences in resource-constrained designs.
Availability
TC1303B-PG0EMFTR is available at Aetrix Electronics and suitable for USB-powered devices, handheld medical instruments, and low-power industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TC1303B-PG0EMFTR 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 mixed-signal ICs, with deep expertise in power management and embedded control solutions.
The TC1303 series was designed to deliver highly integrated, low-quiescent-current dual-output regulation for space-constrained portable electronics - emphasizing independent control, minimal external components, and robust fault protection.
FAQ
What output voltages does the TC1303B-PG0EMFTR provide?
The TC1303B-PG0EMFTR delivers a fixed 1.8 V output from its synchronous buck regulator (VOUT1) and a fixed 3.3 V output from its LDO (VOUT2), as indicated by the "PG0E" suffix in the part number. Both outputs are factory-trimmed to ±0.3% tolerance and require no external feedback resistors.
How does the power-good (PG) function operate in the TC1303B-PG0EMFTR?
In the TC1303B-PG0EMFTR, the PG pin is a push-pull output that asserts high when VOUT2 reaches ≥94% of its nominal 3.3 V value, with a fixed 300 ms delay after regulation is achieved. This behavior is specific to the TC1303B variant and differs from TC1303A (buck-monitored) and TC1303C (dual-monitored).
Can the TC1303B-PG0EMFTR operate from a single-cell Li-ion battery?
Yes - the TC1303B-PG0EMFTR supports input voltages from 2.7 V to 5.5 V and maintains regulation across the full discharge curve of a single-cell Li-ion battery (≈3.0 V to 4.2 V). Its 137 mV LDO dropout ensures stable 3.3 V output down to 3.43 V input, maximizing usable battery capacity.
What is the thermal performance of the TC1303B-PG0EMFTR in the DFN package?
The TC1303B-PG0EMFTR in its 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 thermal vias under the exposed pad. This enables continuous 500 mA buck and 300 mA LDO operation at ambient temperatures up to +85°C without forced airflow.
Does the TC1303B-PG0EMFTR require external compensation components?
No - both the synchronous buck regulator and the LDO in the TC1303B-PG0EMFTR are internally compensated. The buck stage requires only an external 4.7 µH inductor and input/output capacitors; the LDO requires only a 1 µF ceramic output capacitor on VOUT2. No compensation resistors or capacitors are needed.
TC1303B-PG0EMFTR 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:
- 2.7V, 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-PG0EMFTR FAQ
1.How can I place an order for TC1303B-PG0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-PG0EMFTR 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-PG0EMFTR reliable?
The price and inventory of TC1303B-PG0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-PG0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303B-PG0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-PG0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-PG0EMFTR?
TC1303B-PG0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-PG0EMFTR 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-PG0EMFTR?
For technical support, including TC1303B-PG0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-PG0EMFTR requirements.
6.How does Aetrix verify that TC1303B-PG0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303B-PG0EMFTR 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-PG0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303B-PG0EMFTR?
All TC1303B-PG0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-PG0EMFTR, 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-PG0EMFTR part is unused and in its original packaging.
Return procedure for TC1303B-PG0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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