My Inquiry
My Account
Microchip Technology TC1303A-ZP0EUN
- Part No.:
- TC1303A-ZP0EUN
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1303A-ZP0EUN.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,768
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TC1303A-ZP0EUN 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 the buck output only. It delivers 90% typical efficiency at 2.0 MHz switching frequency, features 65 µA total quiescent current, and supports fixed 1.2V/2.5V outputs in a 10-pin 3×3 mm DFN package. It is used in portable computing and USB-powered devices requiring tightly regulated dual-rail supplies.
For engineers reviewing the TC1303A-ZP0EUN datasheet, TC1303A-ZP0EUN pinout, TC1303A-ZP0EUN application, or TC1303A-ZP0EUN equivalent, key selection criteria include buck/LDO output voltage pairing, PG monitoring scope (buck-only), independent shutdown control, thermal performance in DFN-10, and compatibility with ceramic output capacitors (4.7 µF for buck, 1 µF for LDO).
Technical Context
The TC1303A-ZP0EUN implements a fixed-frequency 2.0 MHz PWM buck stage with automatic transition to PFM mode under light load to maintain ultra-low quiescent current. Its internal compensation eliminates external loop components, and the buck output is sensed via VFB1/VOUT1 pin for adjustable or fixed configurations.
The integrated 300 mA LDO operates with 137 mV typical dropout at 200 mA and is independently enabled via SHDN2. Power-good (PG) is an open-drain output tied exclusively to buck regulation status with 300 ms delay-distinct from TC1303B (LDO-monitored) and TC1303C/TC1304 (dual-monitored or sequenced).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA max - supports core logic rails (e.g., 1.2V CPU core) without external current boosting |
| LDO Output Current | 300 mA max - powers auxiliary I/O or memory bias rails (e.g., 2.5V interface) with minimal board area |
| Quiescent Current | 65 µA typical - enables >10-year battery life in always-on portable applications |
| Switching Frequency | 2.0 MHz fixed - allows use of small 4.7 µH inductors and compact 4.7 µF ceramic output capacitors |
| Power-Good Monitoring | Buck output only (TC1303A variant) - asserts PG after 300 ms once VOUT1 reaches 94% of target, enabling processor reset sequencing |
| Dropout Voltage (LDO) | 137 mV @ 200 mA - sustains regulation down to VIN2 = VOUT2 + 0.137V, critical for single-cell Li-ion systems |
| Operating Junction Temp | –40°C to +125°C - qualified for industrial and extended-temperature embedded designs |
Pinout & Package
TC1303A-ZP0EUN is housed in a thermally enhanced 10-pin 3×3 mm DFN package with exposed pad (EP) connected to AGND. The package supports high-power-density layouts and provides θJA = 41°C/W on a 4-layer PCB with internal ground plane and thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control input | Active-high logic input (>45% VIN); enables/disables LDO independently of buck stage |
| 2 (VIN2) | LDO input supply | Accepts 2.7–5.5V input; must be routed adjacent to VIN1 with minimal trace length to reduce noise coupling |
| 3 (VOUT2) | LDO regulated output | Delivers fixed 2.5V (per ZP0EUN suffix); requires ≥1 µF ceramic capacitor to AGND for stability |
| 4 (PG) | Power-good indicator | Open-drain output asserting low when VOUT1 is within 94–96% of regulation; requires external pull-up for system reset logic |
| 5 (AGND) | Analog ground reference | Must be tied to clean analog ground plane; separates noise-sensitive feedback paths from power grounds |
| 6 (PGND) | Power ground return | High-current return path for buck switch node; requires low-inductance connection to AGND at single point |
| 7 (LX) | Buck switch node | Connects to external inductor; carries high di/dt switching current - routing must minimize loop area |
| 8 (VIN1) | Buck input supply | Accepts 2.7–5.5V; shared input with VIN2 in most implementations to simplify power tree |
| 9 (SHDN1) | Buck shutdown control input | Active-high logic input (>45% VIN); enables/disables buck regulator independently of LDO |
| 10 (VFB1/VOUT1) | Buck feedback/sense | Configured as VOUT1 for fixed-output variants (ZP0EUN = 1.2V); connects directly to buck output node |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow staggered enable/disable of buck and LDO outputs - essential for power sequencing in multi-rail SoC systems |
| Internally compensated buck | Eliminates need for external compensation network - reduces BOM count and layout sensitivity while maintaining stability across 100 mA–500 mA loads |
| Low-noise PFM/PWM transition | Automatic shift from 2.0 MHz PWM to pulse-frequency modulation below ~50 mA load - preserves efficiency without audible switching noise or output ripple spikes |
| Thermal and short-circuit protection | Integrated overtemperature shutdown (165°C) and current limiting protect against sustained overload - no external fault-handling circuitry required |
| UVLO with hysteresis | 2.55V turn-on threshold with 200 mV hysteresis prevents oscillation during brown-out conditions - ensures clean startup from weak or decaying batteries |
Applications
| USB-Powered Portable Instrument | Industrial Handheld Terminal |
|---|---|
Use Scenario: Battery-backed handheld medical sensor with USB charging and dual-voltage MCU (1.2V core, 2.5V I/O). IC Role / Device Role / Timing Role: Primary dual-rail power source; buck supplies 1.2V core, LDO supplies 2.5V analog front-end and USB PHY; PG triggers MCU reset on undervoltage. Use Value: 65 µA quiescent current extends battery runtime; 2.0 MHz switching enables compact 3×3 mm layout; fixed 1.2V/2.5V outputs eliminate resistor networks. | Use Scenario: Ruggedized barcode scanner operating from 3.7V Li-ion with -40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Single-chip power solution delivering 1.2V processor rail and 2.5V imager interface rail; PG monitors buck output to hold reset until stable core voltage is achieved. Use Value: 125°C junction rating ensures reliability in sealed enclosures; 137 mV LDO dropout maintains 2.5V output down to 2.637V battery voltage; DFN-10 package withstands mechanical shock. |
| Embedded Cellular Modem Module | Low-Power IoT Edge Node |
Use Scenario: LTE-M module powered by single-cell Li-ion, requiring isolated 1.2V modem core and 2.5V RF transceiver supply. IC Role / Device Role / Timing Role: Dual-output regulator with independent shutdown - buck powers modem baseband, LDO powers RF section; SHDN2 disables LDO during sleep to cut leakage. Use Value: Independent shutdown reduces system standby current to sub-µA levels; PG signal synchronizes modem boot sequence with stable 1.2V rail. | Use Scenario: Wireless sensor node harvesting energy from solar cell, needing ultra-low IQ and fast wake-up from deep sleep. IC Role / Device Role / Timing Role: Primary power conditioner converting variable 3–5V harvest voltage to stable 1.2V/2.5V rails; buck handles bulk conversion, LDO cleans residual ripple for ADC reference. Use Value: 65 µA total IQ minimizes quiescent loss in energy-constrained operation; 31 µs LDO wake-up time enables rapid sensor sampling bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16311-H/MS | Single-output 600 mA buck only; no integrated LDO or PG; requires external LDO for second rail | Suitable only when LDO rail is omitted or implemented separately; lacks power sequencing capability | Select when cost sensitivity outweighs integration benefit and system can tolerate discrete LDO design |
| TPS65023BRSBR | Triple-output (2 buck + 1 LDO); 2.25 MHz switching; higher IQ (120 µA); QFN-32 package | Supports more complex SoC power trees (e.g., ARM Cortex-A8 with DDR, core, I/O); larger footprint and higher BOM cost | Select when additional rails or higher current (up to 1 A buck) are required beyond TC1303A-ZP0EUN's 500/300 mA capability |
Compared with MCP16311-H/MS and TPS65023BRSBR, TC1303A-ZP0EUN offers optimal integration for dual-rail, space-constrained, ultra-low-IQ applications - delivering both regulators, PG, and independent control in a 3×3 mm DFN without compromising thermal performance or startup reliability.
Availability
TC1303A-ZP0EUN is available at Aetrix Electronics and suitable for USB-powered portable instruments, industrial handheld terminals, and embedded cellular modem modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TC1303A-ZP0EUN 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 semiconductor products.
The TC1303 family is designed specifically for space- and power-constrained portable electronics, integrating buck, LDO, and power-good functions into a single chip to replace discrete DC-DC + LDO solutions in battery-operated devices.
FAQ
What output voltages does the TC1303A-ZP0EUN provide?
The TC1303A-ZP0EUN provides fixed 1.2V on VOUT1 (buck output) and fixed 2.5V on VOUT2 (LDO output), as indicated by the "ZP0EUN" part number suffix per Microchip's ordering guide. These values are factory-trimmed and do not require external resistive dividers. Both outputs maintain ±0.3% tolerance over temperature and load, supporting precision voltage requirements in portable computing and instrumentation applications.
How does the power-good (PG) function operate on the TC1303A-ZP0EUN?
The TC1303A-ZP0EUN features an open-drain PG output that monitors only the buck regulator (VOUT1). It asserts low when VOUT1 falls below 92% of nominal and releases high after a 300 ms delay once VOUT1 rises above 94% of nominal. This behavior is specific to the TC1303A variant - unlike TC1303B (LDO-monitored) or TC1303C/TC1304 (dual-monitored). An external pull-up resistor is required for proper reset signaling.
Can the TC1303A-ZP0EUN be used with a single input source for both VIN1 and VIN2?
Yes, the TC1303A-ZP0EUN is designed for shared-input operation: VIN1 and VIN2 are intended to be connected together with short, low-inductance traces. The datasheet specifies that both inputs accept 2.7–5.5V and recommends tying them to the same source (e.g., a 3.7V Li-ion battery or 5V USB supply) to simplify power routing and ensure coordinated UVLO behavior.
What is the thermal performance of the TC1303A-ZP0EUN in its DFN package?
The TC1303A-ZP0EUN in the 10-pin 3×3 mm DFN package achieves θJA = 41°C/W on a standard 4-layer PCB with internal ground plane and two thermal vias under the exposed pad. This enables full 500 mA buck and 300 mA LDO operation up to +85°C ambient without derating, and supports continuous operation at 125°C junction temperature - verified by Microchip's thermal characterization in DS21949C.
Does the TC1303A-ZP0EUN require external compensation components?
No, the TC1303A-ZP0EUN uses internally compensated control loops for both the buck regulator and LDO, eliminating the need for external compensation capacitors or resistors. This simplifies design, reduces BOM count, and improves robustness across manufacturing variance and temperature - confirmed in the "Both Outputs Internally Compensated" feature list and functional block diagram of DS21949C.
TC1303A-ZP0EUN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-MSOP
TC1303A-ZP0EUN FAQ
1.How can I place an order for TC1303A-ZP0EUN through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1303A-ZP0EUN 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 TC1303A-ZP0EUN reliable?
The price and inventory of TC1303A-ZP0EUN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1303A-ZP0EUN is usually 5 days.
3.What payment methods are accepted for TC1303A-ZP0EUN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1303A-ZP0EUN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1303A-ZP0EUN?
TC1303A-ZP0EUN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1303A-ZP0EUN 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 TC1303A-ZP0EUN?
For technical support, including TC1303A-ZP0EUN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1303A-ZP0EUN requirements.
6.How does Aetrix verify that TC1303A-ZP0EUN is sourced from the original manufacturer or authorized distributors?
All TC1303A-ZP0EUN 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 TC1303A-ZP0EUN meets industry standards.
7.What is the process for return or replacement of TC1303A-ZP0EUN?
All TC1303A-ZP0EUN units undergo pre-shipment inspection (PSI). If there is an issue with TC1303A-ZP0EUN, 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 TC1303A-ZP0EUN part is unused and in its original packaging.
Return procedure for TC1303A-ZP0EUN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TC1303A-ZP0EUN Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
