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Microchip Technology TC1303C-ZS0EMFTR
- Part No.:
- TC1303C-ZS0EMFTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303C-ZS0EMFTR.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,983
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Product details
Overview
TC1303C-ZS0EMFTR 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 1.8V/500 mA and 3.3V/300 mA outputs, features 2.0 MHz fixed-frequency PWM operation, 65 µA typical quiescent current, and operates across –40°C to +125°C for portable medical instruments and USB-powered devices.
For engineers reviewing the TC1303C-ZS0EMFTR datasheet, TC1303C-ZS0EMFTR pinout, TC1303C-ZS0EMFTR application, or TC1303C-ZS0EMFTR equivalent, key selection criteria include dual-output sequencing capability, independent shutdown control, 137 mV LDO dropout at 200 mA, open-drain PG output with 300 ms delay, and compatibility with 3×3 mm DFN-10 packaging.
Technical Context
The TC1303C-ZS0EMFTR implements a synchronous buck stage with PFM/PWM auto-transition and an internally compensated LDO-both outputs are independently controllable via SHDN1 and SHDN2. Its power-good circuit monitors regulation status of both VOUT1 and VOUT2 simultaneously, asserting PG after a fixed 300 ms delay upon valid output conditions.
It integrates undervoltage lockout (2.55 V nominal), overtemperature protection (165°C trip), and short-circuit protection on both regulators. The buck stage uses integrated 450 mΩ P- and N-channel MOSFETs, while the LDO requires only a single 1 µF ceramic output capacitor for stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA maximum - supports core voltage rails for low-power processors and FPGAs |
| LDO Output Current | 300 mA maximum - powers I/O, sensors, or communication interfaces requiring low-noise bias |
| Quiescent Current | 65 µA typical - enables multi-day battery life in always-on portable applications |
| Switching Frequency | 2.0 MHz ±0.4 MHz - allows use of compact 4.7 µH inductors and reduces EMI filtering burden |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - maintains regulation down to VIN2 = VOUT2 + 0.137 V |
| Power-Good Delay | 300 ms fixed - provides reliable processor reset timing without external RC networks |
| Operating Temperature | –40°C to +125°C junction - qualified for industrial and automotive under-hood environments |
Pinout & Package
TC1303C-ZS0EMFTR is housed in a 3×3 mm, 10-pin DFN package with exposed thermal pad (EP) connected to AGND. Pin assignments are validated per DS21949C-page 3 and page 5 functional diagrams and pin table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN2 | LDO shutdown control input | Active-high logic (>45% VIN); enables/disables VOUT2 independently of buck stage |
| 2: VIN2 | LDO input supply | Accepts 2.7–5.5 V; must be routed adjacent to VIN1 with minimal trace length |
| 3: VOUT2 | LDO regulated output | Delivers fixed 3.3 V (per ZS0 suffix); requires ≥1 µF ceramic capacitor to AGND |
| 4: PG | Power-good status output | Open-drain, active-low; asserts after 300 ms when both VOUT1 and VOUT2 are within ±6% of target |
| 5: AGND | Analog ground reference | Must connect to dedicated analog ground plane; separate from PGND for noise isolation |
| 6: PGND | Power ground return | High-current return path for buck switch node; ties to AGND only at single point near EP |
| 7: LX | Buck switch node | Connects to external inductor; requires low-inductance layout to minimize ringing and EMI |
| 8: VIN1 | Buck input supply | Accepts 2.7–5.5 V; shares input source with VIN2 per datasheet Note 8 |
| 9: SHDN1 | Buck shutdown control input | Active-high logic (>45% VIN); enables/disables VOUT1 independently of LDO stage |
| 10: VFB1/VOUT1 | Buck feedback or output | Configured as VOUT1 (fixed 1.8 V per ZS0 suffix); no external divider required |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow staggered power-up/down of processor core (VOUT1) and I/O rail (VOUT2) |
| Internally compensated regulators | Eliminates need for external compensation components - reduces BOM count and layout area |
| Automatic PWM-to-PFM mode transition | Maintains >85% efficiency at light loads (<10 mA) without control-loop reconfiguration |
| Low-noise LDO output | 1.8 µV/√Hz output noise at 1 kHz enables clean power for ADCs and RF front-ends |
| Robust protection suite | Includes UVLO (2.55 V), thermal shutdown (165°C), and short-circuit current limiting on both outputs |
Applications
| Portable Medical Instrumentation | USB-Powered Test Equipment |
|---|---|
Use Scenario: Powering handheld glucose meters and pulse oximeters with dual-rail requirements (1.8 V MCU core + 3.3 V sensor interface). IC Role / Device Role / Timing Role: Dual-output PMIC providing sequenced, low-noise, battery-efficient power with integrated PG for system reset coordination. Use Value: Enables single-cell Li-ion operation (2.7–4.2 V input) with <65 µA quiescent draw and guaranteed 300 ms reset hold time. | Use Scenario: Supplying benchtop USB-C powered oscilloscope modules requiring stable 1.8 V digital core and 3.3 V analog front-end rails. IC Role / Device Role / Timing Role: Compact dual-regulator delivering regulated outputs directly from 5 V USB bus with PG confirmation before firmware initialization. Use Value: Eliminates discrete LDO/buck combinations; 3×3 mm DFN footprint saves >40% board area versus discrete solutions. |
| Industrial Handheld Terminals | Low-Power IoT Edge Nodes |
Use Scenario: Power management for ruggedized barcode scanners operating across –30°C to +70°C ambient with cold-start capability. IC Role / Device Role / Timing Role: High-reliability dual-output regulator with –40°C to +125°C junction rating and UVLO hysteresis for stable startup under varying battery conditions. Use Value: Maintains 137 mV LDO dropout at –40°C, enabling full 300 mA output even at low temperatures and aging batteries. | Use Scenario: Energy-constrained wireless sensor nodes using BLE SoCs that require precise 1.8 V core and 3.3 V radio supply with ultra-low sleep current. IC Role / Device Role / Timing Role: Low-IQ dual regulator supporting deep-sleep modes where only PG assertion wakes host MCU. Use Value: 65 µA combined operating IQ extends battery life beyond 5 years in 10-second wake/sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBR | Triple-output (2 buck + 1 LDO); higher IQ (120 µA); 4×4 mm QFN-24 package | Supports additional auxiliary rail; less suitable for space-constrained dual-rail designs | Select when third regulated output or higher current (1 A buck) is required |
| RT8070ZSP | Dual buck-only (no integrated LDO); 3.5 MHz switching; 2.5×2.5 mm WDFN-10 | Lacks low-noise linear output - unsuitable for analog/RF sections needing clean bias | Select when both rails demand switching efficiency and noise sensitivity is not critical |
Compared with TPS65023BRSBR and RT8070ZSP, TC1303C-ZS0EMFTR uniquely balances compact dual-rail integration, ultra-low quiescent current, and LDO-based noise isolation - making it optimal for battery-powered instrumentation where size, efficiency, and analog integrity are jointly constrained.
Availability
TC1303C-ZS0EMFTR is available at Aetrix Electronics and suitable for portable medical instrumentation, USB-powered test equipment, and industrial handheld terminals requiring stable component supply with long-term lifecycle assurance.
Supply support for TC1303C-ZS0EMFTR 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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
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 output voltages does the TC1303C-ZS0EMFTR provide?
The TC1303C-ZS0EMFTR provides fixed 1.8 V at up to 500 mA from its synchronous buck regulator (VOUT1) and fixed 3.3 V at up to 300 mA from its low-dropout linear regulator (VOUT2). These values are confirmed by the "ZS0" suffix in the part number and verified in DS21949C-page 5 fixed-output application schematics and electrical characteristics tables.
How does the power-good (PG) function operate in TC1303C-ZS0EMFTR?
The TC1303C-ZS0EMFTR's PG pin is an open-drain output that asserts low only after both VOUT1 and VOUT2 reach and maintain regulation within ±6% for 300 ms. This dual-monitoring behavior distinguishes it from TC1303A (buck-only monitoring) and TC1303B (LDO-only monitoring), and is explicitly defined in DS21949C-page 1 feature list and page 9 DC characteristics.
Can TC1303C-ZS0EMFTR operate from a single Li-ion cell?
Yes - TC1303C-ZS0EMFTR supports input voltages from 2.7 V to 5.5 V, covering the full discharge range of a single-cell Li-ion (2.7–4.2 V). Its 137 mV LDO dropout at 200 mA and 280 mV buck dropout at 500 mA ensure regulation is maintained even at end-of-discharge, as confirmed in DS21949C-page 8 electrical characteristics.
What package type is used for TC1303C-ZS0EMFTR?
TC1303C-ZS0EMFTR uses a 3×3 mm, 10-pin DFN package with exposed thermal pad (EP), designated in Microchip documentation as "10-Lead DFN" and validated in DS21949C-page 2 package drawings and page 5 application circuits. The EP must be soldered to AGND for thermal and electrical performance.
Does TC1303C-ZS0EMFTR support independent enable control of each regulator?
Yes - TC1303C-ZS0EMFTR provides two independent shutdown inputs: SHDN1 controls the buck regulator (VOUT1) and SHDN2 controls the LDO (VOUT2). Both are active-high logic inputs with thresholds defined at >45% VIN (high) and <15% VIN (low), as specified in DS21949C-page 7 DC characteristics and page 19 pin descriptions.
TC1303C-ZS0EMFTR 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:
- Adj, 500mA
- Voltage/Current - Output 2:
- 1.5V, 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-ZS0EMFTR FAQ
1.How can I place an order for TC1303C-ZS0EMFTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303C-ZS0EMFTR 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-ZS0EMFTR reliable?
The price and inventory of TC1303C-ZS0EMFTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303C-ZS0EMFTR is usually 5 days.
3.What payment methods are accepted for TC1303C-ZS0EMFTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303C-ZS0EMFTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303C-ZS0EMFTR?
TC1303C-ZS0EMFTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303C-ZS0EMFTR 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-ZS0EMFTR?
For technical support, including TC1303C-ZS0EMFTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303C-ZS0EMFTR requirements.
6.How does Aetrix verify that TC1303C-ZS0EMFTR is sourced from the original manufacturer or authorized distributors?
All TC1303C-ZS0EMFTR 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-ZS0EMFTR meets industry standards.
7.What is the process for return or replacement of TC1303C-ZS0EMFTR?
All TC1303C-ZS0EMFTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1303C-ZS0EMFTR, 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-ZS0EMFTR part is unused and in its original packaging.
Return procedure for TC1303C-ZS0EMFTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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