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Microchip Technology TC1303B-ZP0EMF
- Part No.:
- TC1303B-ZP0EMF
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TC1303B-ZP0EMF.pdf
- Description:
- IC REG DL BUCK/LINEAR SYNC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,051
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Product details
Overview
TC1303B-ZP0EMF 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 the power-good (PG) output monitoring only the LDO output (VOUT2). It delivers 94% regulation threshold on VOUT2, 137 mV typical dropout at 200 mA, and operates across -40°C to +125°C junction temperature. It targets portable battery-powered systems requiring tightly regulated core and I/O rails.
For engineers reviewing the TC1303B-ZP0EMF datasheet, TC1303B-ZP0EMF pinout, TC1303B-ZP0EMF application, or TC1303B-ZP0EMF equivalent, key selection criteria include its LDO-monitored PG function, independent SHDN2 control for the LDO, 2.0 MHz fixed-frequency PWM operation under heavy load, PFM mode transition at light load, and compatibility with 1 µF ceramic output capacitors on VOUT2.
Technical Context
The TC1303B-ZP0EMF implements a synchronous buck topology with integrated high- and low-side MOSFETs (RDS(on) = 450 mΩ each), operating at a fixed 2.0 MHz switching frequency under heavy load and automatically transitioning to pulse-frequency modulation (PFM) mode below ~10 mA to minimize quiescent current. Its LDO stage features internal compensation and supports standard fixed outputs (1.5V, 1.8V, 2.5V, 3.3V).
Power-good logic is dedicated solely to VOUT2 regulation, asserting a push-pull PG signal when VOUT2 reaches ≥94% of nominal and deasserting at ≤92%, with 300 ms delay used for processor reset timing. UVLO activates below 2.4 V (typical), and thermal shutdown triggers at 165°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA maximum - supports processor core or SoC VDD rail without external boost |
| LDO Output Current | 300 mA maximum - powers I/O peripherals, sensors, or RF sections with low noise |
| PG Monitoring Target | VOUT2 only - enables precise LDO health monitoring for system reset sequencing |
| Quiescent Current | 65 µA typical total - extends battery life in always-on or low-power standby modes |
| Switching Frequency | 2.0 MHz fixed (heavy load) - allows use of compact 4.7 µH inductors and reduces EMI filtering burden |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - enables operation from single-cell Li-ion (2.7–4.2 V) down to 1.8 V output |
| Operating Temperature | -40°C to +125°C junction - qualified for automotive cabin, industrial handheld, and medical device environments |
Pinout & Package
TC1303B-ZP0EMF is housed in a 10-pin 3×3 mm DFN package with exposed thermal pad (EP), optimized for space-constrained portable designs. Pin 11 (EP) must be soldered to AGND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown input | Active-high logic control (≥45% VIN) - enables independent LDO enable/disable without affecting buck stage |
| 2 (VIN2) | LDO input supply | Accepts 2.7–5.5 V input; must be tied closely to VIN1 to minimize noise coupling into LDO path |
| 3 (VOUT2) | LDO regulated output | Delivers fixed 3.3 V (per ZP0EMF suffix); requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 (PG) | Power-good output | Push-pull active-high signal indicating VOUT2 ≥94% of nominal - directly drives processor RESET without pull-up |
| 5 (AGND) | Analog ground reference | Separate ground return for feedback and regulation circuitry - must connect to quiet analog ground plane |
| 6 (PGND) | Power ground | High-current return path for buck switch node - requires low-inductance connection to AGND via multiple vias |
| 7 (LX) | Buck switch node | Connects to external inductor; carries high di/dt - routing must avoid sensitive analog traces |
| 8 (VIN1) | Buck input supply | Accepts 2.7–5.5 V; shares input source with VIN2 but routed separately to reduce LDO input ripple |
| 9 (SHDN1) | Buck shutdown input | Active-high logic control (≥45% VIN) - allows independent buck enable/disable, e.g., for deep-sleep modes |
| 10 (VFB1/VOUT1) | Buck feedback or output | Configured as VOUT1 (fixed 2.5 V per ZP0EMF suffix); no external divider needed |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown controls | SHDN1 and SHDN2 allow granular power sequencing - e.g., keep LDO active while buck sleeps |
| Internally compensated LDO | Eliminates need for external compensation network - reduces BOM count and layout sensitivity |
| Automatic PWM-to-PFM transition | Maintains >85% efficiency down to 100 µA load - critical for IoT sensor wake/sleep cycles |
| Push-pull PG output | Drives RESET directly without external pull-up resistor - simplifies reset circuit and improves noise immunity |
| Overtemperature & short-circuit protection | Thermal shutdown at 165°C and current limiting on both outputs - prevents field failure under fault conditions |
Applications
| Cellular Phone Power Management | USB-Powered Portable Instrument |
|---|---|
Use Scenario: Dual-rail power delivery for baseband processor (1.2 V core) and RF transceiver (3.3 V I/O). IC Role / Device Role / Timing Role: TC1303B-ZP0EMF provides synchronized startup of buck (VOUT1 = 2.5 V) and LDO (VOUT2 = 3.3 V), with PG asserting only after VOUT2 stabilizes. Use Value: Eliminates discrete LDO and buck controllers, reducing board area by >40% and enabling single-cell Li-ion operation. | Use Scenario: Portable medical glucose meter powered from USB 5 V, requiring clean 3.3 V for MCU and 2.5 V for ADC reference. IC Role / Device Role / Timing Role: TC1303B-ZP0EMF delivers low-noise 3.3 V (VOUT2) and stable 2.5 V (VOUT1), with PG confirming LDO readiness before ADC initialization. Use Value: PSRR >62 dB at 100 Hz on VOUT2 ensures <1 µV ripple on ADC reference, improving measurement accuracy. |
| Handheld Industrial Scanner | Ultra-Compact PDA System |
Use Scenario: Rugged barcode scanner using single Li-ion cell, needing 3.3 V for display backlight and 2.5 V for image sensor interface. IC Role / Device Role / Timing Role: TC1303B-ZP0EMF's 137 mV LDO dropout enables full 3.3 V output down to 3.43 V input - extending runtime near battery depletion. Use Value: 65 µA quiescent current minimizes self-discharge during idle scan intervals, increasing standby time by 3× vs. legacy solutions. | Use Scenario: Legacy PDA with ARM9 CPU requiring 1.8 V core and 3.3 V peripheral rail, constrained by 3×3 mm PCB real estate. IC Role / Device Role / Timing Role: TC1303B-ZP0EMF integrates both regulators in 3×3 mm DFN, with VOUT1 = 2.5 V and VOUT2 = 3.3 V matching PDA voltage map. Use Value: DFN package with EP reduces thermal resistance to 41°C/W - maintains <105°C junction at full load in sealed enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1303C-ZP0EMF | Monitors both VOUT1 and VOUT2 for PG assertion; open-drain PG output | Required where system reset depends on stability of both rails - e.g., FPGA configuration with dual-supply I/O banks | Select TC1303C-ZP0EMF only if coordinated power-good for buck+LDO is mandatory; otherwise TC1303B-ZP0EMF offers simpler reset timing. |
| TPS65023RGZR | Triple-output PMIC (2 buck + 1 LDO); I²C programmable; 2.25 MHz switching | Supports dynamic voltage scaling and complex sequencing - e.g., OMAP-based tablets with variable core voltage | Choose TPS65023RGZR when design requires >2 rails or software-controlled margins; TC1303B-ZP0EMF is optimal for cost-sensitive dual-rail fixed-voltage apps. |
Compared with TC1303C-ZP0EMF and TPS65023RGZR, TC1303B-ZP0EMF provides the lowest BOM cost and smallest footprint for applications needing LDO-only power-good confirmation and fixed 2.5 V/3.3 V outputs - ideal for volume portable electronics where simplicity and reliability outweigh programmability.
Availability
TC1303B-ZP0EMF is available at Aetrix Electronics and suitable for cellular phones, USB-powered devices, and handheld medical instruments requiring stable component supply across extended production lifecycles.
Supply support for TC1303B-ZP0EMF 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, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The TC1303 family was designed specifically for space- and power-constrained portable electronics, delivering integrated dual-rail regulation with minimal external components and robust protection features for battery-operated systems.
FAQ
What output voltages does the TC1303B-ZP0EMF provide?
The TC1303B-ZP0EMF delivers a fixed 2.5 V output on VOUT1 (buck regulator) and a fixed 3.3 V output on VOUT2 (LDO), as indicated by the "ZP0" suffix in the part number. Both outputs are factory-trimmed to ±0.3% tolerance over temperature, eliminating need for external feedback resistors or trimming circuits.
How does the power-good (PG) function work on the TC1303B-ZP0EMF?
The TC1303B-ZP0EMF's PG pin is a push-pull output that asserts high only when VOUT2 reaches ≥94% of its nominal value (3.3 V), with 300 ms delay for reliable processor reset timing. It deasserts when VOUT2 falls below 92%, and unlike TC1303A/C variants, it does not monitor the buck output - ensuring reset is tied exclusively to LDO health.
Can the TC1303B-ZP0EMF operate from a single-cell Li-ion battery?
Yes, the TC1303B-ZP0EMF supports input voltages from 2.7 V to 5.5 V, and its LDO stage achieves 137 mV dropout at 200 mA - enabling stable 3.3 V output down to an input of 3.43 V. This allows full functionality across >90% of a single-cell Li-ion discharge curve (4.2 V → 3.0 V), with UVLO preventing operation below 2.4 V.
What is the thermal performance of the TC1303B-ZP0EMF in its DFN package?
In the 10-pin 3×3 mm DFN package with exposed pad, the TC1303B-ZP0EMF achieves a typical θJA of 41°C/W on a 4-layer board with internal ground plane and two thermal vias. At full 500 mA + 300 mA load and 25°C ambient, junction temperature rise remains within safe limits (<105°C), and thermal shutdown activates only above 165°C with 10°C hysteresis.
Does the TC1303B-ZP0EMF require external compensation components?
No, the TC1303B-ZP0EMF features fully internal compensation for both the buck regulator and LDO stages. The buck uses a fixed-frequency current-mode controller with integrated loop compensation, and the LDO is unity-gain stable with only a 1 µF ceramic output capacitor required on VOUT2 - eliminating external RC networks and simplifying layout.
TC1303B-ZP0EMF 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:
- Adj, 500mA
- Voltage/Current - Output 2:
- 1.8V, 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-ZP0EMF FAQ
1.How can I place an order for TC1303B-ZP0EMF through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303B-ZP0EMF 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-ZP0EMF reliable?
The price and inventory of TC1303B-ZP0EMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303B-ZP0EMF is usually 5 days.
3.What payment methods are accepted for TC1303B-ZP0EMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303B-ZP0EMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303B-ZP0EMF?
TC1303B-ZP0EMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303B-ZP0EMF 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-ZP0EMF?
For technical support, including TC1303B-ZP0EMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303B-ZP0EMF requirements.
6.How does Aetrix verify that TC1303B-ZP0EMF is sourced from the original manufacturer or authorized distributors?
All TC1303B-ZP0EMF 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-ZP0EMF meets industry standards.
7.What is the process for return or replacement of TC1303B-ZP0EMF?
All TC1303B-ZP0EMF units undergo pre-shipment inspection (PSI). If there is an issue with TC1303B-ZP0EMF, 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-ZP0EMF part is unused and in its original packaging.
Return procedure for TC1303B-ZP0EMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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