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Microchip Technology TC1303B-PI0EMFTR
- Part No.:
- TC1303B-PI0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-PI0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
TC1303B-PI0EMFTR 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 94% regulation threshold detection, 137 mV typical dropout at 200 mA for VOUT2, and operates across –40°C to +125°C junction temperature. It targets portable battery-powered systems requiring tightly regulated dual-rail supplies such as USB-powered devices and handheld medical instruments.
For engineers reviewing the TC1303B-PI0EMFTR datasheet, TC1303B-PI0EMFTR pinout, TC1303B-PI0EMFTR application, or TC1303B-PI0EMFTR equivalent, key selection criteria include LDO-monitored PG behavior, independent SHDN2 control, 2.0 MHz fixed-frequency PWM operation with automatic PFM transition, 65 µA typical quiescent current, and compatibility with 1 µF ceramic output capacitors on VOUT2.
Technical Context
The TC1303B-PI0EMFTR implements a synchronous buck stage with integrated P-channel and N-channel MOSFETs (RDS(on) = 450 mΩ each), operating at a fixed 2.0 MHz switching frequency under heavy load and transitioning automatically to pulse-frequency modulation (PFM) at light loads to maintain ultra-low quiescent current. Its LDO stage features internal compensation and supports standard fixed outputs (1.5V/1.8V/2.5V/3.3V).
Unlike TC1303A (buck-monitored PG) or TC1303C/TC1304 (dual-monitored PG), the TC1303B variant exclusively monitors VOUT2 for power-good assertion, and provides a push-pull PG output - confirmed in DS21949C-page 7 and page 9 - enabling direct interface with processor reset inputs without external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output 1 Type | 500 mA synchronous buck regulator with internal MOSFETs and 2.0 MHz fixed-frequency PWM |
| Output 2 Type | 300 mA low-dropout linear regulator (LDO) with 137 mV typical dropout @ 200 mA |
| Power-Good Monitoring | Push-pull PG output triggered only by LDO (VOUT2) regulation status, with 94% threshold and 300 ms delay |
| Quiescent Current | 65 µA typical total device IQ with both outputs active - enables >100-hour standby in coin-cell–powered devices |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single Li-ion, Li-polymer, or USB 5 V supply rails |
| Operating Temperature | –40°C to +125°C junction range - qualified for industrial and extended-temperature portable applications |
| Protection Features | Undervoltage lockout (2.55 V nominal), overtemperature shutdown (165°C), and short-circuit protection on both outputs |
Pinout & Package
TC1303B-PI0EMFTR is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), pin-compatible with the MSOP variant. The package supports high thermal performance (θJA = 41°C/W on 4-layer board) and requires EP connection to AGND per DS21949C-page 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 | LDO enable input | Active-high logic input (>45% VIN); controls LDO output independently of buck stage |
| VIN2 | LDO input supply | Accepts same input as VIN1 (2.7–5.5 V); must be routed with minimal trace length to VIN1 |
| VOUT2 | LDO regulated output | Delivers fixed 1.5V/1.8V/2.5V/3.3V; requires ≥1 µF ceramic capacitor to AGND |
| PG | Power-good indicator | Push-pull output asserting high when VOUT2 reaches 94% of target; no external pull-up needed |
| AGND | Analog ground reference | Separate ground return for feedback and regulation circuitry; must tie to low-noise analog ground plane |
| VFB1/VOUT1 | Buck feedback or output | Configured as VOUT1 for fixed-output variants; used as feedback node for adjustable versions |
| LX | Buck switch node | Connects to external 4.7 µH inductor; carries high di/dt switching current - requires tight layout |
| VIN1 | Buck input supply | Main input for buck stage; shares source with VIN2 - must be low-impedance path |
| PGND | Power ground | High-current return path for buck stage; separate from AGND but connected at single point |
| SHDN1 | Buck enable input | Active-high logic input (>45% VIN); enables/disables buck regulator independently of LDO |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow sequenced power-up/down of buck and LDO outputs - critical for FPGA or multi-rail SoC biasing |
| Internally compensated LDO | Eliminates need for external compensation network; enables stable operation with only 1 µF ceramic output capacitor |
| Automatic PWM-to-PFM mode transition | Maintains high efficiency (>85%) down to 1 mA load without manual mode selection or control pin intervention |
| Low-noise buck architecture | 2.0 MHz fixed frequency minimizes EMI filter size; typical output noise <1.8 µV/√Hz below 1 kHz |
| LDO-monitored push-pull PG | Directly drives processor RESET line without pull-up resistor - reduces BOM count and improves noise immunity |
Applications
| USB-Powered Portable Instrument | Handheld Medical Sensor Node |
|---|---|
Use Scenario: Battery-powered glucose meter with microcontroller, analog front-end, and LCD display. IC Role / Device Role / Timing Role: Dual-rail power source delivering 1.8 V for MCU core and 3.3 V for sensor interface/LCD driver. Use Value: 65 µA quiescent current extends battery life; LDO-monitored PG ensures reliable MCU reset upon sensor rail stabilization. | Use Scenario: Wireless ECG patch using single-cell Li-ion battery and low-power BLE SoC. IC Role / Device Role / Timing Role: Generates 1.2 V for digital core and 2.5 V for analog signal chain from 3.0–4.2 V battery input. Use Value: Independent SHDN2 allows sleep-mode LDO disable while keeping buck active for RTC; 137 mV dropout preserves runtime at end-of-discharge. |
| Industrial Handheld Terminal | Portable Diagnostic Ultrasound Probe |
Use Scenario: Ruggedized barcode scanner with ARM Cortex-M7 MCU and imager module. IC Role / Device Role / Timing Role: Supplies 3.3 V for I/O and 1.5 V for CPU core; PG asserts only after LDO reaches regulation to prevent premature boot. Use Value: Push-pull PG eliminates external pull-up, reducing layout area and improving ESD robustness in field-deployed units. | Use Scenario: Battery-operated ultrasound probe requiring clean analog supply for transducer drivers and ADCs. IC Role / Device Role / Timing Role: Provides low-noise 2.5 V LDO rail and efficient 1.8 V digital rail from shared 3.7 V battery. Use Value: Internally compensated LDO with 1 µF capacitor meets ripple requirements (<10 mVpp) without added ferrite beads or LC filters. |
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-PI0EMFTR | PG monitors buck output (VOUT1), not LDO; PG is open-drain, requiring external pull-up | Suitable where system reset depends on main processor rail stability, not auxiliary bias rail | Select when primary regulation monitoring is required on the higher-current buck output |
| TPS65023RSBR | Triple-output (2 buck + 1 LDO), I²C programmable, 2.25 MHz switching, but 125 µA IQ and QFN-24 package | Supports dynamic voltage scaling and more complex sequencing; larger footprint and higher cost | Choose when design requires >2 rails or software-configurable output voltages and margins |
Compared with TC1303A-PI0EMFTR and TPS65023RSBR, the TC1303B-PI0EMFTR uniquely balances minimal external components (no PG pull-up, 1 µF LDO cap), ultra-low IQ, and LDO-specific power-good assertion - making it optimal for space-constrained, battery-sensitive dual-rail systems where auxiliary rail integrity dictates system readiness.
Availability
TC1303B-PI0EMFTR is available at Aetrix Electronics and suitable for USB-powered devices, handheld medical instruments, and portable industrial terminals requiring stable component supply, long battery life, and compact dual-rail power delivery.
Supply support for TC1303B-PI0EMFTR 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 a strong focus on embedded control and power management solutions.
The TC1303 family was designed specifically for portable, battery-operated applications needing highly integrated, low-quiescent-current dual-output regulators - emphasizing simplicity, reliability, and minimal external component count.
FAQ
What is the power-good (PG) behavior of the TC1303B-PI0EMFTR?
The TC1303B-PI0EMFTR features a push-pull PG output that asserts high only when the LDO output (VOUT2) reaches and maintains ≥94% of its nominal voltage. It includes a 300 ms delay before assertion and a 262 ms timeout if regulation is lost. This behavior is explicitly defined for TC1303B in DS21949C-page 7 and page 9, distinguishing it from TC1303A (buck-monitored, open-drain PG) and TC1303C/TC1304 (dual-monitored PG). The TC1303B-PI0EMFTR does not monitor the buck output for PG.
Can the TC1303B-PI0EMFTR support adjustable buck output voltage?
Yes, the TC1303B-PI0EMFTR supports adjustable buck output from 0.8 V to 4.5 V via external resistor divider connected to the VFB1/VOUT1 pin. Its feedback reference voltage is tightly specified at 0.8 V ±2.5%, with ±0.3% output tolerance over temperature and line/load conditions. Fixed-output versions (e.g., 1.2 V, 1.8 V, 3.3 V) are also available; the TC1303B-PI0EMFTR is a fixed-output variant - its VOUT1 is factory-set and does not require external resistors.
What is the minimum output capacitor required for the LDO (VOUT2) of the TC1303B-PI0EMFTR?
The TC1303B-PI0EMFTR requires a minimum 1 µF ceramic capacitor on VOUT2 to ensure stability and transient response, as confirmed in DS21949C-page 5 (typical application circuits) and page 8 (DC characteristics). This value applies across all standard fixed-output voltages (1.5 V, 1.8 V, 2.5 V, 3.3 V). Larger values (e.g., 4.7 µF) improve load-step response but are not mandatory. The LDO is internally compensated - no additional ESR or series resistance is needed.
How does shutdown work on the TC1303B-PI0EMFTR?
The TC1303B-PI0EMFTR provides independent shutdown control: SHDN1 disables the buck regulator, and SHDN2 disables the LDO. Both are active-high inputs requiring >45% of VIN to enable; logic-low (<15% VIN) forces the respective output into high-impedance state. When both are low, total device quiescent current drops to 0.05 µA typical. This separation enables flexible power sequencing - for example, keeping the buck active for real-time clock while disabling the LDO during deep sleep - a capability verified in DS21949C-page 7 and page 19.
Is the TC1303B-PI0EMFTR RoHS-compliant and halogen-free?
Yes, the TC1303B-PI0EMFTR is RoHS-compliant and halogen-free, consistent with Microchip's standard environmental compliance for surface-mount packages introduced post-2006. This is confirmed by Microchip's official product change notices (PCNs) and material declarations for the TC1303 family, which specify lead-free matte tin plating and halogen-free molding compounds for DFN packages like PI0EMFTR. No exemptions apply.
TC1303B-PI0EMFTR 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:
- 2.5V, 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-PI0EMFTR FAQ
1.How can I place an order for TC1303B-PI0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-PI0EMFTR 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-PI0EMFTR reliable?
The price and inventory of TC1303B-PI0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-PI0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303B-PI0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-PI0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-PI0EMFTR?
TC1303B-PI0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-PI0EMFTR 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-PI0EMFTR?
For technical support, including TC1303B-PI0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-PI0EMFTR requirements.
6.How does Aetrix verify that TC1303B-PI0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303B-PI0EMFTR 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-PI0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303B-PI0EMFTR?
All TC1303B-PI0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-PI0EMFTR, 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-PI0EMFTR part is unused and in its original packaging.
Return procedure for TC1303B-PI0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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