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Microchip Technology TC1303C-PI0EMF
- Part No.:
- TC1303C-PI0EMF
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303C-PI0EMF.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,126
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Product details
Overview
TC1303C-PI0EMF 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 both outputs. It delivers 94% regulation accuracy, 2.0 MHz fixed-frequency PWM operation, and 65 µA typical quiescent current. Designed for portable battery-powered systems requiring independent voltage rails - such as processor core (1.2–3.3 V) and I/O bias (1.5–3.3 V) - it supports seamless PWM-to-PFM transition under light load.
For engineers reviewing the TC1303C-PI0EMF datasheet, TC1303C-PI0EMF pinout, TC1303C-PI0EMF application, or TC1303C-PI0EMF equivalent, key selection criteria include dual-rail sequencing capability, simultaneous buck+LDO monitoring via open-drain PG, thermal shutdown at 165°C, and compatibility with 1 µF ceramic output capacitors on the LDO rail.
Technical Context
The TC1303C-PI0EMF implements an integrated synchronous buck stage with P-channel and N-channel MOSFETs (RDS(on) = 450 mΩ each), operating at 2.0 MHz ±20% across input voltage (2.7–5.5 V) and temperature (-40°C to +125°C). Its LDO stage features 137 mV typical dropout at 200 mA and internal compensation requiring only a single 1 µF output capacitor.
Power-good logic monitors both VOUT1 and VOUT2 simultaneously with 94% high-threshold and 89% low-threshold hysteresis, 300 ms active timeout, and open-drain output configuration - distinct from TC1303B's push-pull PG and TC1304's sequenced startup/shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA max - supports mid-power processor cores without external current boosting |
| LDO Output Current | 300 mA max - powers peripheral I/O, USB PHY, or sensors with minimal board area |
| Quiescent Current | 65 µA typical - enables >1-year battery life in always-on sensor nodes |
| PG Monitoring Scope | Both VOUT1 and VOUT2 - ensures system reset only after stable dual-rail power-up |
| Operating Temp Range | -40°C to +125°C junction - qualified for automotive cabin and industrial edge environments |
| Dropout Voltage (LDO) | 137 mV @ 200 mA - maintains regulation down to VIN = VOUT + 0.137 V |
| Oscillator Frequency | 2.0 MHz fixed - allows use of compact 4.7 µH inductors and reduces EMI filtering burden |
Pinout & Package
TC1303C-PI0EMF is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), optimized for high-density portable designs. Pin 1 is SHDN2 (active-high LDO enable), Pin 4 is open-drain PG, Pin 5 is PGND, Pin 6 is LX (buck switch node), Pin 7 is VIN1 (buck input), Pin 8 is SHDN1 (active-high buck enable), Pin 9 is VFB1/VOUT1 (buck feedback/output), and Pin 10 is AGND. The EP must be connected to AGND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 (Pin 1) | LDO enable control | Logic-high (>45% VIN) activates 300 mA LDO; independent of buck control |
| VIN2 (Pin 2) | LDO input supply | Accepts 2.7–5.5 V; must be short-traced to VIN1 to minimize noise coupling |
| VOUT2 (Pin 3) | LDO regulated output | Delivers fixed or adjustable 1.5/1.8/2.5/3.3 V; requires ≥1 µF ceramic capacitor to AGND |
| PG (Pin 4) | Power-good indicator | Open-drain output asserting when both VOUT1 and VOUT2 are within ±6% of target |
| PGND (Pin 5) | Power ground return | Separate ground path for buck switching current; must be routed to AGND at single point |
| LX (Pin 6) | Buck switch node | Connects to external 4.7 µH inductor and catch diode; high dv/dt node requiring tight layout |
| VIN1 (Pin 7) | Buck input supply | Primary input for 500 mA buck stage; shares voltage source with VIN2 |
| SHDN1 (Pin 8) | Buck enable control | Independent logic-high enable for buck regulator; allows asymmetric rail control |
| VFB1/VOUT1 (Pin 9) | Buck feedback/output | Configurable as adjustable (0.8–4.5 V) via resistor divider or fixed-output connection |
| AGND (Pin 10) | Analog reference ground | Reference for all internal references and error amplifiers; connects to EP for thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown controls | SHDN1 and SHDN2 allow staggered power-up/down of buck and LDO rails without external logic |
| Internally compensated LDO | Eliminates need for external compensation network - reduces BOM count and layout sensitivity |
| Automatic PWM-to-PFM mode transition | Maintains >85% efficiency at loads <10 mA without manual mode selection or control pin intervention |
| Open-drain PG with dual-rail monitoring | Single PG signal asserts only when both regulators meet 94% regulation - prevents premature processor release |
| Thermal and overcurrent protection | 165°C shutdown with 10°C hysteresis and cycle-by-cycle current limiting on both outputs ensure robust field operation |
Applications
| Portable Medical Sensors | USB-C Powered Peripherals |
|---|---|
Use Scenario: Wearable ECG monitor powered by single-cell Li-ion (3.0–4.2 V) requiring 1.8 V analog front-end and 3.3 V digital MCU. IC Role / Device Role / Timing Role: Dual-rail PMIC delivering isolated, low-noise supplies with coordinated power-good assertion before MCU boot. Use Value: 137 mV LDO dropout extends usable battery range by 120 mV; 65 µA IQ enables multi-week standby without recharge. | Use Scenario: USB-C dock providing 5 V input to generate 1.2 V SoC core and 1.8 V memory interface. IC Role / Device Role / Timing Role: Primary voltage translator enabling direct USB-C PD sourcing without intermediate DC-DC stages. Use Value: 2.0 MHz buck frequency permits <2 mm² inductor footprint; dual PG monitoring prevents data corruption during rail ramp-up. |
| Industrial Handheld Terminals | Low-Power IoT Edge Nodes |
Use Scenario: Ruggedized barcode scanner operating from 3.6 V primary battery with 1.5 V display driver and 2.5 V RF transceiver supply. IC Role / Device Role / Timing Role: Compact dual-output regulator supporting mixed-voltage peripherals with fault-tolerant power sequencing. Use Value: -40°C to +125°C rating ensures operation in warehouse freezer aisles; undervoltage lockout prevents brownout resets below 2.55 V. | Use Scenario: Battery-operated environmental sensor node using BLE SoC (1.8 V) and MEMS sensor (2.5 V) with 10-year deployment target. IC Role / Device Role / Timing Role: Ultra-low-IQ power manager enabling deep-sleep current <1 µA while maintaining fast wake-up (<100 µs) on LDO rail. Use Value: 300 mA LDO supports burst transmit without voltage sag; 1 µF output cap minimizes PCB area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1303B-PI0EMF | PG output is push-pull instead of open-drain; monitors LDO output only (not buck) | Suitable where single-rail monitoring suffices and pull-up resistor on PG is undesirable | Select when system requires active-high PG signal and does not need buck rail supervision |
| TPS65023RSBR | Triple-output (2 buck + 1 LDO); higher IQ (120 µA); no dual-rail PG monitoring | Used in OMAP-based handhelds needing three independent rails | Choose when third rail is required and open-drain PG is not mandatory |
Compared with TC1303B-PI0EMF and TPS65023RSBR, TC1303C-PI0EMF uniquely provides open-drain PG with simultaneous buck+LDO monitoring in a 3×3 mm DFN - critical for fail-safe boot sequencing in safety-aware portable devices.
Availability
TC1303C-PI0EMF is available at Aetrix Electronics and suitable for portable medical instruments, USB-C powered peripherals, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TC1303C-PI0EMF 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, analog, and FPGA solutions, emphasizing reliability, longevity, and design-in support for industrial and automotive markets.
The TC1303 family was engineered specifically for space-constrained, battery-powered applications demanding dual independent voltage rails with coordinated power-good signaling and ultra-low quiescent current.
FAQ
What is the power-good (PG) behavior of TC1303C-PI0EMF?
The TC1303C-PI0EMF features an open-drain PG output that asserts low only when both VOUT1 (buck) and VOUT2 (LDO) are within 94% of their nominal voltages. It includes a 300 ms active timeout period and 2% hysteresis to prevent chatter during marginal conditions. This dual-rail monitoring distinguishes TC1303C-PI0EMF from TC1303A (buck-only PG) and TC1303B (LDO-only push-pull PG).
Can TC1303C-PI0EMF support adjustable buck output voltage?
Yes, TC1303C-PI0EMF supports adjustable buck output from 0.8 V to 4.5 V via external resistor divider connected to the VFB1/VOUT1 pin (Pin 9). The internal reference is 0.8 V ±2.5%, and feedback bias current is only -1.5 nA - enabling high-impedance dividers that minimize quiescent current impact.
What thermal performance can be expected from TC1303C-PI0EMF in a 4-layer PCB?
In a typical 4-layer board with internal ground plane and two vias under the exposed pad, TC1303C-PI0EMF (10L-DFN) achieves θJA = 41°C/W. At 500 mA buck load and 300 mA LDO load with 3.6 V input, junction temperature rise remains below 45°C above ambient - well within the 125°C max rating and enabling full-load operation without forced air.
How does TC1303C-PI0EMF handle light-load efficiency?
TC1303C-PI0EMF automatically transitions from 2.0 MHz PWM mode to pulse-frequency modulation (PFM) under light load (<10 mA), reducing quiescent current to 65 µA typical. This preserves >85% efficiency at 100 µA load - critical for battery longevity in always-on IoT endpoints where the TC1303C-PI0EMF operates continuously in PFM.
What are the minimum external components required for TC1303C-PI0EMF?
TC1303C-PI0EMF requires only five external components for basic operation: one 4.7 µH inductor (LX to VOUT1), one 4.7 µF input capacitor (VIN1 to PGND), one 4.7 µF buck output capacitor (VOUT1 to PGND), one 1 µF LDO output capacitor (VOUT2 to AGND), and one 0.1 µF bypass capacitor on VIN2. No compensation networks or external PG pull-ups are needed due to internal integration.
TC1303C-PI0EMF 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:
- 2.5V, 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)
TC1303C-PI0EMF FAQ
1.How can I place an order for TC1303C-PI0EMF through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303C-PI0EMF 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 TC1303C-PI0EMF reliable?
The price and inventory of TC1303C-PI0EMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303C-PI0EMF is usually 5 days.
3.What payment methods are accepted for TC1303C-PI0EMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303C-PI0EMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303C-PI0EMF?
TC1303C-PI0EMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303C-PI0EMF 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 TC1303C-PI0EMF?
For technical support, including TC1303C-PI0EMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303C-PI0EMF requirements.
6.How does Aetrix verify that TC1303C-PI0EMF is sourced from the original manufacturer or authorized distributors?
All TC1303C-PI0EMF 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 TC1303C-PI0EMF meets industry standards.
7.What is the process for return or replacement of TC1303C-PI0EMF?
All TC1303C-PI0EMF units undergo pre-shipment inspection (PSI). If there is an issue with TC1303C-PI0EMF, 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 TC1303C-PI0EMF part is unused and in its original packaging.
Return procedure for TC1303C-PI0EMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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