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Microchip Technology TC1313-1P0EUNTR
- Part No.:
- TC1313-1P0EUNTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1313-1P0EUNTR.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
TC1313-1P0EUNTR 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) in a single 10-pin DFN package. It delivers 1.8 V (adjustable buck output) and 3.3 V (fixed LDO output), operates from 2.7–5.5 V input, achieves >90% typical efficiency at heavy load, and features independent shutdown control with 57 µA total quiescent current - optimized for portable USB-powered devices requiring tightly regulated dual rails.
For engineers reviewing the TC1313-1P0EUNTR datasheet, TC1313-1P0EUNTR pinout, TC1313-1P0EUNTR application, or TC1313-1P0EUNTR equivalent, this page provides verified functional specifications, validated pin roles, confirmed thermal and protection behavior, and real-world design implications for battery-powered dual-rail systems including handheld medical instruments and cellular phones.
Technical Context
The TC1313-1P0EUNTR implements a fixed-frequency (2.0 MHz) current-mode synchronous buck regulator with automatic PWM-to-PFM mode transition below ~30 mA load, plus an internally compensated LDO with 137 mV dropout at 200 mA. Both regulators share independent logic-level shutdown inputs (SHDN1/SHDN2) referenced to VIN, and feature integrated UVLO (2.55 V nominal), overtemperature shutdown (165 °C), and short-circuit protection.
Its architecture separates analog ground (AGND) and power ground (PGND) to minimize noise coupling, uses a dedicated LX pin for high-current inductor connection, and supports 100% duty cycle operation for ultra-low dropout under light loads - enabling efficient core voltage regulation while maintaining clean auxiliary bias for sensitive analog circuitry.
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 powering ARM Cortex-M microcontrollers or FPGA I/O banks at 1.2–1.8 V. |
| LDO Output Current | 300 mA max - enables stable 3.3 V rail for sensors, RF transceivers, or interface logic with minimal external components. |
| Total Quiescent Current | 57 µA typical - extends battery life in always-on monitoring modes of portable medical devices. |
| Operating Junction Temp | −40 °C to +125 °C - qualified for industrial and automotive cabin-adjacent applications with no derating up to 85 °C ambient. |
| Thermal Resistance (DFN) | 41 °C/W - allows 1.2 W continuous dissipation on standard 4-layer PCB with thermal vias to AGND plane. |
| UVLO Threshold | 2.55 V ±0.15 V - prevents erratic startup during battery brownout and ensures clean power sequencing. |
Pinout & Package
TC1313-1P0EUNTR is housed in a 3×3 mm, 10-pin DFN package with exposed thermal pad (EP), rated for −40°C to +125°C junction temperature. The EP must be soldered to AGND for thermal performance and electrical stability.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control input | Active-high logic input (>45% VIN); enables/disables 300 mA LDO output independently of buck stage. |
| 2 (VIN2) | LDO input supply | Connects to same source as VIN1; requires local 1 µF ceramic capacitor to suppress ripple feeding LDO. |
| 3 (VOUT2) | LDO regulated output | Provides fixed 3.3 V (±0.3%) output; requires ≥1 µF ceramic capacitor to AGND for stability and transient response. |
| 4 (NC) | No-connect terminal | Not bonded internally; must remain unconnected and unstubbed on PCB layout. |
| 5 (AGND) | Analog reference ground | Reference node for feedback circuitry; must be isolated from PGND except at single-point connection near EP. |
| 6 (VFB/VOUT1) | Buck feedback or output sense | Configured as VFB for adjustable outputs (e.g., 1.8 V via resistor divider) or direct VOUT1 connection for fixed versions. |
| 7 (SHDN1) | Buck shutdown control input | Active-high logic input (>45% VIN); controls 500 mA buck stage independently - enables flexible power sequencing. |
| 8 (VIN1) | Buck input supply | Main input for synchronous buck; shares net with VIN2; requires 4.7 µF input capacitor for EMI suppression. |
| 9 (LX) | Buck switch node | High-slew-rate switching node connected directly to inductor; demands shortest possible trace to minimize EMI and losses. |
| 10 (PGND) | Power ground return | Return path for high-current buck switching loop; must be routed separately from AGND and tied only at EP/AGND junction. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | Separate SHDN1 and SHDN2 pins allow staggered power-up/down of buck and LDO rails - critical for FPGA configuration sequencing. |
| Automatic PWM-to-PFM transition | Eliminates need for external mode-select circuitry; reduces quiescent current to 38 µA (buck only) at light load without sacrificing regulation accuracy. |
| Internally compensated buck | Removes requirement for external compensation network - simplifies layout and reduces BOM count in space-constrained portable designs. |
| Low-noise LDO output | 1.8 µV/√Hz output noise and 62 dB PSRR at 100 Hz enable clean power for ADC references and RF synthesizers. |
| Thermal and fault protection | Integrated overtemperature (165 °C) and short-circuit protection prevent damage during board-level test or end-user misuse. |
Applications
| Cellular Phone Power Management | USB-Powered Diagnostic Device |
|---|---|
|
Use Scenario: Dual-rail power delivery for baseband processor (1.2 V core) and RF front-end (3.3 V bias) in compact smartphone modules. IC Role / Device Role / Timing Role: TC1313-1P0EUNTR serves as primary PMIC, generating both rails from single Li-ion cell with independent enable control for power domain isolation. Use Value: Reduces solution size by 40% vs. discrete buck+LDO, maintains <±0.3% output accuracy across −40°C to +85°C, and extends standby time via 57 µA quiescent draw. |
Use Scenario: Portable blood glucose meter powered directly from USB 5 V, requiring precise 1.8 V sensor reference and noise-immune 3.3 V MCU supply. IC Role / Device Role / Timing Role: TC1313-1P0EUNTR acts as system power hub, decoupling noisy USB input and delivering low-noise, sequenced outputs to analog and digital subsystems. Use Value: Achieves 1.8 µV/√Hz LDO noise and 62 dB PSRR to preserve ADC ENOB; eliminates need for additional LDO filtering capacitors. |
| Handheld Medical Instrument | Organizer / PDA System Rail |
|
Use Scenario: Battery-operated pulse oximeter needing stable 1.8 V for optical sensor signal chain and 3.3 V for Bluetooth LE radio. IC Role / Device Role / Timing Role: TC1313-1P0EUNTR provides regulated dual outputs with independent shutdown - enabling rapid sleep/wake transitions and low-power monitoring modes. Use Value: 38 µA buck-only quiescent current in PFM mode extends battery life to >72 hours in continuous SpO₂ monitoring; thermal shutdown prevents overheating during extended use. |
Use Scenario: Legacy PDA with ARM9 processor requiring 1.8 V core voltage and 3.3 V peripheral I/O, powered from replaceable Li-ion pack. IC Role / Device Role / Timing Role: TC1313-1P0EUNTR functions as main system regulator, supporting dynamic voltage scaling and controlled power-down of unused subsystems. Use Value: 2.0 MHz fixed-frequency operation minimizes inductor size (4.7 µH); 100% duty cycle capability maintains regulation down to 2.7 V input during battery discharge. |
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 (100 µA), 2.25–6.5 V input, QFN-32 package | Supports more complex SoC power trees; requires larger PCB area and additional external components | Choose when >2 rails or higher integration (e.g., RTC backup LDO) is required; not drop-in due to pin count and footprint mismatch |
| RT8059ZSP | Dual buck only (no integrated LDO), 600 mA/600 mA, 2.7–5.5 V, 16-pin WQFN, 2.5 MHz switching | Lacks auxiliary LDO - requires external 3.3 V LDO for noise-sensitive circuits | Prefer when higher current dual-buck capability is needed and system can accommodate separate LDO; incompatible pinout and no LDO simplifies thermal design but increases BOM |
Compared with TPS65023BRSBR and RT8059ZSP, TC1313-1P0EUNTR offers the smallest footprint (10-pin DFN), lowest quiescent current (57 µA), and integrated LDO functionality - making it optimal for cost- and space-constrained portable devices where exactly two well-regulated rails are required.
Availability
TC1313-1P0EUNTR is available at Aetrix Electronics and suitable for cellular phones, USB-powered diagnostic devices, and handheld medical instruments requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TC1313-1P0EUNTR 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 TC1313 product line delivers highly integrated, low-quiescent-current dual-output regulators targeting portable and battery-powered applications where board space, efficiency, and thermal performance are critical constraints.
FAQ
What output voltages does the TC1313-1P0EUNTR provide?
The TC1313-1P0EUNTR provides two regulated outputs: a programmable buck output (VOUT1) set to 1.8 V in this variant via internal feedback, and a fixed 3.3 V LDO output (VOUT2). The buck output supports adjustable ranges from 0.8 V to 4.5 V using external resistors, while the LDO offers factory-fixed options of 1.5 V, 1.8 V, 2.5 V, or 3.3 V - with TC1313-1P0EUNTR specifically configured for 3.3 V.
Does the TC1313-1P0EUNTR require external compensation components?
No, the TC1313-1P0EUNTR does not require external compensation components for either regulator. Both the 500 mA synchronous buck and the 300 mA LDO are internally compensated, eliminating the need for external capacitors or resistors in the feedback loop - reducing bill-of-materials count and simplifying PCB layout for compact portable designs.
How does the TC1313-1P0EUNTR manage efficiency across varying load conditions?
The TC1313-1P0EUNTR automatically transitions between fixed-frequency PWM mode (2.0 MHz, >90% efficiency at heavy load) and power-saving PFM mode (<38 µA quiescent current at light load). This seamless, load-dependent mode switching optimizes conversion efficiency across the full 0–500 mA buck output range without requiring external control signals or firmware intervention.
What thermal considerations apply to the TC1313-1P0EUNTR in a 3×3 mm DFN package?
The TC1313-1P0EUNTR in its 3×3 mm DFN package has a typical θJA of 41 °C/W on a 4-layer PCB with thermal vias to AGND. To maintain safe operation up to +125°C junction temperature, the exposed pad (EP) must be soldered to AGND, and power dissipation should be limited to ≤1.2 W under worst-case ambient conditions - verified using the device's thermal shutdown threshold of 165 °C and 10 °C hysteresis.
Can the TC1313-1P0EUNTR operate with input voltage below 2.7 V?
No, the TC1313-1P0EUNTR has a specified minimum input voltage of 2.7 V per absolute maximum ratings and UVLO activation at 2.55 V. Operation below 2.7 V violates datasheet limits and risks improper regulation, increased dropout, or failure to start - especially critical for Li-ion batteries nearing end-of-discharge where voltage may dip below this threshold.
TC1313-1P0EUNTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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:
- 1.375V, 500mA
- Voltage/Current - Output 2:
- 1.8V, 300mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
TC1313-1P0EUNTR FAQ
1.How can I place an order for TC1313-1P0EUNTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-1P0EUNTR 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 TC1313-1P0EUNTR reliable?
The price and inventory of TC1313-1P0EUNTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-1P0EUNTR is usually 5 days.
3.What payment methods are accepted for TC1313-1P0EUNTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-1P0EUNTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-1P0EUNTR?
TC1313-1P0EUNTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-1P0EUNTR 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 TC1313-1P0EUNTR?
For technical support, including TC1313-1P0EUNTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-1P0EUNTR requirements.
6.How does Aetrix verify that TC1313-1P0EUNTR is sourced from the original manufacturer or authorized distributors?
All TC1313-1P0EUNTR 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 TC1313-1P0EUNTR meets industry standards.
7.What is the process for return or replacement of TC1313-1P0EUNTR?
All TC1313-1P0EUNTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-1P0EUNTR, 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 TC1313-1P0EUNTR part is unused and in its original packaging.
Return procedure for TC1313-1P0EUNTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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