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Microchip Technology TC1303B-PG0EMF
- Part No.:
- TC1303B-PG0EMF
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-PG0EMF.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,878
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Product details
Overview
TC1303B-PG0EMF 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 for VOUT2, and operates across –40°C to +125°C junction temperature. It is used in portable medical instruments requiring stable dual-rail biasing under battery-constrained conditions.
For engineers reviewing the TC1303B-PG0EMF datasheet, TC1303B-PG0EMF pinout, TC1303B-PG0EMF application, or TC1303B-PG0EMF equivalent, key selection criteria include LDO-monitored PG behavior, independent SHDN2 control, 2.0 MHz fixed-frequency PWM operation with automatic PFM transition, and DFN/MSOP package compatibility for space-constrained handheld designs.
Technical Context
The TC1303B-PG0EMF implements a synchronous buck stage with integrated P-channel and N-channel MOSFETs (RDS(on) = 450 mΩ each), switching at 2.0 MHz (±20%) under heavy load and transitioning automatically to PFM mode at light loads to maintain 65 µA typical quiescent current. Its LDO stage uses internal compensation and requires only a single 1 µF ceramic output capacitor.
Power-good logic is dedicated to VOUT2 regulation with push-pull output (unlike open-drain variants), 94% high-threshold and 92% low-threshold hysteresis, 300 ms active timeout, and ±30 ppm/°C tempco. UVLO triggers at 2.55 V (typ) with 200 mV hysteresis, and thermal shutdown activates at 165°C with 10°C hysteresis.
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 supply without external pre-regulation |
| Buck Output Current | 500 mA max - sufficient for processor core rails or FPGA I/O banks in portable systems |
| LDO Output Current | 300 mA max - powers analog sensors, RF front-ends, or low-noise peripherals |
| LDO Dropout Voltage | 137 mV typ @ 200 mA - enables high-efficiency operation even at low input margins (e.g., 2.8 V → 2.5 V) |
| Quiescent Current | 65 µA typ - extends battery life in always-on monitoring modes of handheld medical devices |
| PG Monitoring Target | VOUT2 only - ensures system reset is asserted only when auxiliary rail is valid, critical for mixed-signal sequencing |
| Operating Temperature | –40°C to +125°C junction - qualified for industrial and extended-temperature portable medical applications |
Pinout & Package
TC1303B-PG0EMF is packaged in a 10-pin 3×3 mm DFN with exposed pad (EP), thermally connected to AGND. Pin 1 is SHDN2; pin 10 is PG. The exposed pad must be soldered to AGND for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 (Pin 1) | LDO enable control | Active-high logic input (>45% VIN); allows independent LDO shutdown without affecting buck stage |
| VIN2 (Pin 2) | LDO input supply | Accepts same input as VIN1; must be routed with minimal trace length to reduce noise coupling into LDO path |
| VOUT2 (Pin 3) | LDO regulated output | Delivers fixed or adjustable voltage; requires ≥1 µF ceramic capacitor to AGND for stability |
| PG (Pin 4) | Power-good status | Push-pull output indicating VOUT2 is within 94–92% of nominal; drives processor RESET directly |
| AGND (Pin 5) | Analog ground reference | Separate ground return for feedback and sensing; must be tied to quiet analog ground plane |
| PGND (Pin 6) | Power ground return | High-current return path for buck switch node; requires low-inductance connection to input capacitor |
| LX (Pin 7) | Buck switch node | Connects to external 4.7 µH inductor; carries high di/dt; requires tight layout and Kelvin routing |
| VIN1 (Pin 8) | Buck input supply | Main input for switching regulator; shares source with VIN2 but routed separately for optimal EMI control |
| SHDN1 (Pin 9) | Buck enable control | Independent active-high enable; permits staggered startup/shutdown with SHDN2 |
| VFB1/VOUT1 (Pin 10) | Buck feedback or output | Configurable: connect to divider midpoint for adjustable VOUT1 (0.8–4.5 V), or directly to VOUT1 for fixed outputs |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown controls | SHDN1 and SHDN2 allow separate sequencing of buck and LDO outputs-enabling safe power-up of digital core before analog peripherals |
| Internally compensated LDO | Eliminates need for external compensation components; reduces BOM count and board area while ensuring stability with 1 µF ceramic output cap |
| 2.0 MHz fixed-frequency PWM | Enables use of small 4.7 µH inductors and 4.7 µF input/output capacitors-critical for miniaturized portable medical enclosures |
| Automatic PWM-to-PFM transition | Maintains high efficiency (<75%) down to 1 mA load without manual mode control-ideal for intermittent sensor sampling in battery-powered devices |
| Push-pull PG output (TC1303B) | Drives RESET lines directly without pull-up resistor; eliminates external component and improves noise immunity vs. open-drain alternatives |
| Overtemperature & short-circuit protection | Thermal shutdown at 165°C with 10°C hysteresis and cycle-by-cycle current limiting on both outputs-prevents field failures in sealed medical housings |
Applications
| Portable Medical Instrumentation | USB-Powered Diagnostic Devices |
|---|---|
|
Use Scenario: Handheld ECG monitor powered by single-cell Li-ion battery with real-time analog front-end and BLE radio. IC Role / Device Role / Timing Role: TC1303B-PG0EMF supplies 1.8 V (buck) to MCU core and 3.3 V (LDO) to analog signal chain and RF transceiver, with PG asserting RESET until LDO stabilizes. Use Value: Independent SHDN2 control allows analog section to remain powered during MCU sleep, reducing wake latency; 137 mV LDO dropout preserves runtime at end-of-discharge. |
Use Scenario: Plug-and-play blood glucose meter drawing power exclusively from USB 5 V port. IC Role / Device Role / Timing Role: TC1303B-PG0EMF generates 3.3 V (buck) for microcontroller and 2.5 V (LDO) for precision ADC reference, with PG tied to host enumeration logic. Use Value: 2.7–5.5 V input range accepts full USB tolerance; push-pull PG provides clean, resistorless reset signaling to host controller during hot-plug events. |
| Industrial Handheld Terminals | Wearable Health Sensors |
|
Use Scenario: Ruggedized barcode scanner operating in warehouses with wide ambient temperature swings (–20°C to +60°C). IC Role / Device Role / Timing Role: TC1303B-PG0EMF delivers 1.2 V (buck) to ARM Cortex-M core and 3.3 V (LDO) to imager interface, with PG monitoring LDO to prevent boot failure during cold start. Use Value: –40°C to +125°C junction rating ensures reliable startup at –20°C ambient; 94% PG threshold prevents premature release of RESET under marginal LDO regulation. |
Use Scenario: Continuous glucose monitor worn on skin, powered by coin-cell battery with multi-year target lifetime. IC Role / Device Role / Timing Role: TC1303B-PG0EMF supplies 1.8 V (buck) to ultra-low-power SoC and 2.5 V (LDO) to biosensor amplifier, with PG enabling periodic self-test only when rails are valid. Use Value: 65 µA typical IQ minimizes quiescent drain; automatic PFM mode sustains >85% efficiency at 10 µA load-extending usable battery life by >30% vs. fixed-frequency-only regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1303C-PG0EMF | Monitors both buck and LDO outputs for PG assertion; open-drain PG output; identical pinout and electrical specs otherwise | Suitable where system-level reset must wait for both rails to stabilize-e.g., FPGA configurations requiring simultaneous VCCINT and VCCAUX | Select TC1303C-PG0EMF if coordinated dual-rail validation is required; otherwise TC1303B-PG0EMF offers simpler LDO-only reset logic |
| TPS62231RGTR | Single-output 600 mA buck converter only; no integrated LDO or PG monitoring; 3 MHz switching; smaller 2×2 QFN | Requires external LDO (e.g., TPS799xx) and discrete PG circuitry-increasing BOM count and layout complexity | Choose TPS62231RGTR only when size is paramount and dual-rail integration is not needed; TC1303B-PG0EMF reduces total solution footprint by 35% in dual-rail designs |
Compared with TC1303C-PG0EMF, TC1303B-PG0EMF simplifies reset sequencing by tying PG exclusively to VOUT2, reducing external logic; versus TPS62231RGTR, it eliminates the need for a second regulator and discrete monitoring, lowering design risk and test overhead in Class II medical devices.
Availability
TC1303B-PG0EMF is available at Aetrix Electronics and suitable for portable medical instrumentation, USB-powered diagnostic devices, industrial handheld terminals, wearable health sensors, and battery-operated embedded systems requiring stable dual-rail supply with LDO-monitored power-good signaling.
Supply support for TC1303B-PG0EMF 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 components, and power management ICs, serving automotive, industrial, and consumer markets with high-reliability silicon solutions.
The TC1303 family was designed specifically for space- and power-constrained portable electronics requiring tightly regulated dual-voltage rails with minimal external components and robust fault protection.
FAQ
What is the power-good (PG) monitoring behavior of TC1303B-PG0EMF?
The TC1303B-PG0EMF monitors only the LDO output (VOUT2) for power-good assertion. Its PG pin is a push-pull output that goes high when VOUT2 reaches 94% of its nominal value and remains high until VOUT2 falls below 92%. This behavior is confirmed in DS21949C-page 3 functional block diagram and page 9 DC characteristics table, distinguishing it from TC1303A (buck-only monitoring) and TC1303C (dual-rail monitoring).
Does TC1303B-PG0EMF require external compensation components?
No, TC1303B-PG0EMF does not require external compensation. Both the synchronous buck regulator and the LDO are internally compensated, as explicitly stated in the Features section of DS21949C-page 1. The LDO operates stably with only a 1 µF ceramic output capacitor, and the buck stage requires no external loop compensation network.
What package type is TC1303B-PG0EMF supplied in?
TC1303B-PG0EMF is supplied in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), as specified in DS21949C-page 2 Package Types and confirmed by the "PG0EMF" suffix per Microchip's part numbering convention ('EMF' = 10L DFN). The exposed pad must be soldered to AGND for thermal and electrical performance.
Can TC1303B-PG0EMF generate adjustable buck output voltages?
Yes, TC1303B-PG0EMF supports adjustable buck output from 0.8 V to 4.5 V using an external resistor divider connected to the VFB1/VOUT1 pin (Pin 10), as defined in DS21949C-page 8 Electrical Characteristics and Figure 2-1 on page 5. Fixed-output versions (e.g., 1.2 V, 1.5 V) are also available, but TC1303B-PG0EMF's VFB pin enables flexible core voltage tuning.
What is the maximum junction temperature rating for TC1303B-PG0EMF?
The maximum junction temperature for TC1303B-PG0EMF is +125°C for continuous operation, with transient capability up to +150°C, as specified in DS21949C-page 10 Temperature Specifications. Thermal shutdown activates at +165°C (typical) with 10°C hysteresis, providing robust overtemperature protection in sealed portable enclosures.
TC1303B-PG0EMF 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:
- 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-PG0EMF FAQ
1.How can I place an order for TC1303B-PG0EMF through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-PG0EMF 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-PG0EMF reliable?
The price and inventory of TC1303B-PG0EMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-PG0EMF is usually 5 days.
3.What payment methods are accepted for TC1303B-PG0EMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-PG0EMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-PG0EMF?
TC1303B-PG0EMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-PG0EMF 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-PG0EMF?
For technical support, including TC1303B-PG0EMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-PG0EMF requirements.
6.How does Aetrix verify that TC1303B-PG0EMF is sourced from the original manufacturer or authorized distributors?
All TC1303B-PG0EMF 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-PG0EMF meets industry standards.
7.What is the process for return or replacement of TC1303B-PG0EMF?
All TC1303B-PG0EMF units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-PG0EMF, 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-PG0EMF part is unused and in its original packaging.
Return procedure for TC1303B-PG0EMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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