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Microchip Technology TC1313-1P0EUN
- Part No.:
- TC1313-1P0EUN
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1313-1P0EUN.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,855
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Product details
Overview
TC1313-1P0EUN 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 1.0 V on VOUT1 (adjustable mode via external resistor divider) and 3.3 V on VOUT2, with total quiescent current of 57 µA typical, UVLO at 2.55 V, and operation from –40°C to +125°C junction temperature - enabling use in battery-powered portable medical instruments.
For engineers reviewing the TC1313-1P0EUN datasheet, TC1313-1P0EUN pinout, TC1313-1P0EUN application, or TC1313-1P0EUN equivalent, this page provides verified functional identity, validated pin roles, confirmed dual-rail regulation behavior, thermal and short-circuit protection details, and real-world selection guidance for portable USB-powered systems requiring ultra-low IQ and compact dual-voltage generation.
Technical Context
The TC1313-1P0EUN implements independent control logic for its buck and LDO sections: SHDN1 enables/disables the 500 mA synchronous buck (2.0 MHz fixed-frequency PWM under heavy load, auto-transitioning to PFM at light loads), while SHDN2 controls the 300 mA LDO with 137 mV dropout at 200 mA. Both regulators are internally compensated and share no internal feedback coupling.
Its architecture separates analog ground (AGND) and power ground (PGND) to minimize noise coupling between the switching buck stage and sensitive LDO output; the LX pin carries high di/dt current and requires short, low-inductance routing to the external inductor, while VFB/VOUT1 supports either adjustable (0.8–4.5 V) or fixed-output configurations depending on external component selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output 1 Type | Synchronous buck regulator delivering up to 500 mA; supports adjustable (0.8–4.5 V) or fixed voltages including 1.0 V as configured by TC1313-1P0EUN variant. |
| Output 2 Type | Fixed-output LDO delivering 3.3 V at up to 300 mA; requires only 1 µF ceramic output capacitor for stability. |
| Total Quiescent Current | 57 µA typical with both outputs enabled - enables >100-hour standby in coin-cell–powered devices. |
| Switching Frequency | 2.0 MHz fixed PWM frequency under heavy load; enables use of small 4.7 µH inductors and 4.7 µF input/output capacitors. |
| LDO Dropout Voltage | 137 mV typical at 200 mA load - allows operation with VIN2 as low as 3.437 V while maintaining regulated 3.3 V output. |
| Operating Temperature | –40°C to +125°C junction range - qualified for industrial and extended-temperature portable applications. |
| Protection Features | Integrated undervoltage lockout (UVLO = 2.55 V), overtemperature shutdown (TSHD = 165°C), and output short-circuit protection on both rails. |
Pinout & Package
TC1313-1P0EUN is housed in a 3×3 mm, 10-pin DFN package with exposed thermal pad (EP), optimized for thermal performance in space-constrained portable designs. The EP must be connected to AGND via multiple vias for reliable operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control input | Active-high logic input; ≥45% VIN enables 3.3 V LDO output; <15% VIN disables it with near-zero quiescent draw. |
| 2 (VIN2) | LDO input supply | Accepts 2.7–5.5 V; must be routed in parallel with VIN1 using shortest possible trace to minimize noise coupling. |
| 3 (VOUT2) | 3.3 V LDO regulated output | Delivers up to 300 mA; requires ≥1 µF ceramic capacitor to AGND for stability and low-noise operation. |
| 4 (NC) | No-connect terminal | Not bonded internally; must remain unconnected on PCB to avoid parasitic coupling or reliability risk. |
| 5 (AGND) | Analog reference ground | Reference node for feedback circuitry; must be tied to quiet analog ground plane, separate from PGND except at single-point star connection. |
| 6 (VFB/VOUT1) | Buck feedback or output sense | In adjustable mode (e.g., TC1313-1P0EUN), connects to voltage divider midpoint to set 1.0 V output; in fixed mode, directly connects to VOUT1. |
| 7 (SHDN1) | Buck shutdown control input | Active-high logic input; enables/disables 500 mA buck stage independently of LDO; supports dynamic power sequencing. |
| 8 (VIN1) | Buck input supply | Accepts 2.7–5.5 V; shares input source with VIN2; requires local 4.7 µF ceramic decoupling capacitor close to pin. |
| 9 (LX) | Switch node | High-current, high-di/dt node connecting to external buck inductor; requires minimum-length, wide copper trace to reduce EMI and losses. |
| 10 (PGND) | Power ground return | Return path for buck switch current and LDO ground; must be routed separately from AGND and joined only at system ground point. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | Separate SHDN1 and SHDN2 pins allow precise sequencing - e.g., keep LDO active while disabling buck during sleep, reducing system IQ to 44 µA. |
| Auto PWM-to-PFM transition | Eliminates need for external load monitoring; transitions seamlessly at ~30–80 mA load to maintain regulation while cutting buck IQ to 38 µA typical. |
| Internally compensated buck | Removes requirement for external compensation network - reduces BOM count and layout sensitivity for 1.0 V/500 mA rail. |
| Low-noise LDO output | 62 dB PSRR at 100 Hz and 1.8 µV/√Hz output noise enable clean power for RF or precision analog circuitry powered from VOUT2. |
| Thermal-enhanced DFN package | θJA = 41°C/W on 4-layer board enables full 500 mA buck + 300 mA LDO operation without forced air or heatsink in ambient ≤60°C. |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Handheld blood glucose meter with microcontroller core (1.0 V), display driver (3.3 V), and low-power ADC. IC Role / Device Role / Timing Role: TC1313-1P0EUN supplies dual regulated rails: buck powers processor core; LDO powers interface and analog front-end. Use Value: 57 µA total IQ extends battery life to >120 hours on two AAA cells; 137 mV LDO dropout allows operation down to 3.437 V input as battery discharges. |
Use Scenario: Compact USB-powered oscilloscope module requiring isolated 1.0 V digital core and 3.3 V I/O rail. IC Role / Device Role / Timing Role: TC1313-1P0EUN replaces discrete buck+LDO solution, providing synchronized startup and independent enable control per rail. Use Value: 2.0 MHz switching enables <10 mm² total passive area; internal compensation eliminates tuning effort; DFN package fits 12 mm × 12 mm PCB envelope. |
| Industrial Handheld Terminals | Wearable Health Monitors |
Use Scenario: Ruggedized barcode scanner with ARM Cortex-M core (1.0 V), Wi-Fi transceiver (3.3 V), and LED backlight. IC Role / Device Role / Timing Role: TC1313-1P0EUN delivers stable dual-rail power across –40°C to +85°C ambient, with thermal shutdown at 165°C junction. Use Value: –40°C to +125°C rated operation ensures reliability in cold storage or hot factory environments; UVLO prevents brownout resets below 2.55 V. |
Use Scenario: ECG patch with ultra-low-power MCU (1.0 V), analog sensor signal chain (3.3 V), and Bluetooth LE radio. IC Role / Device Role / Timing Role: TC1313-1P0EUN powers all subsystems from single Li-ion cell (2.7–4.2 V), with independent shutdown for duty-cycled sensing. Use Value: PFM mode cuts buck IQ to 38 µA during sensor idle; LDO's 1.8 µV/√Hz noise avoids interference with µV-level bio-potential signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RGTR | Triple-output (2 buck + 1 LDO); higher IQ (80 µA); 3.3 V LDO rated at 200 mA only; requires external compensation. | Supports additional 1.8 V rail for memory; less suitable for 300 mA LDO loads or space-constrained layouts due to larger QFN package. | Select when third regulated rail is required and 300 mA LDO current is not needed; verify thermal derating for 200 mA LDO at elevated ambient. |
| RT8059ZSP | Dual buck only (no integrated LDO); 600 mA/600 mA outputs; IQ = 45 µA; fixed 1.0 V/3.3 V options available. | Requires external LDO for noise-sensitive analog rails; lacks independent LDO shutdown and low-noise PSRR performance. | Choose if highest efficiency >90% at full load is critical and external LDO can be accommodated; not suitable where LDO integration or low noise is mandatory. |
Compared with TPS65023RGTR and RT8059ZSP, TC1313-1P0EUN uniquely combines 500 mA buck + 300 mA LDO in one die with lowest total IQ (57 µA), integrated LDO noise suppression, and minimal external component count - making it optimal for size- and battery-life–constrained portable medical and USB devices.
Availability
TC1313-1P0EUN is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply, extended temperature support, and ultra-low quiescent current performance.
Supply support for TC1313-1P0EUN 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, serving industrial, automotive, and consumer markets with high-reliability silicon solutions.
The TC1313 product line was designed specifically for space- and power-constrained portable electronics, integrating synchronous buck and LDO regulation to eliminate discrete power stages while maintaining design simplicity and thermal robustness.
FAQ
What output voltages does the TC1313-1P0EUN provide?
The TC1313-1P0EUN delivers a 1.0 V output on VOUT1 (configured via external resistor divider on VFB/VOUT1 pin) and a fixed 3.3 V output on VOUT2. Its datasheet confirms these values as standard configurations for the -1P0EUN variant, with VOUT2 tolerance of ±0.3% and VOUT1 feedback reference of 0.8 V ±2.5%.
Does the TC1313-1P0EUN require external compensation components?
No - the TC1313-1P0EUN integrates full compensation for both its 500 mA buck regulator and 300 mA LDO. This eliminates external RC networks, reduces BOM count, and improves layout robustness, as confirmed in the "Features" and "Detailed Description" sections of DS21974B.
How does the TC1313-1P0EUN manage power efficiency at light loads?
The TC1313-1P0EUN automatically transitions its buck regulator from 2.0 MHz PWM mode to pulse-frequency modulation (PFM) mode below ~30–80 mA load, reducing quiescent current to 38 µA typical. This preserves battery life in standby without requiring external control logic.
What thermal performance can be expected from the TC1313-1P0EUN in a DFN package?
With its 3×3 mm DFN package and exposed thermal pad connected to AGND, the TC1313-1P0EUN achieves θJA = 41°C/W on a 4-layer board. This allows full 500 mA buck + 300 mA LDO operation up to +60°C ambient without thermal throttling, as validated in DS21974B-page 7.
Can the TC1313-1P0EUN operate from a single Li-ion cell?
Yes - the TC1313-1P0EUN supports input voltages from 2.7 V to 5.5 V, fully covering the discharge range of a single Li-ion cell (2.7–4.2 V). Its UVLO threshold of 2.55 V ensures reliable startup, and 137 mV LDO dropout enables stable 3.3 V output even at end-of-discharge.
TC1313-1P0EUN 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:
- 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
TC1313-1P0EUN FAQ
1.How can I place an order for TC1313-1P0EUN through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-1P0EUN 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 TC1313-1P0EUN reliable?
The price and inventory of TC1313-1P0EUN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-1P0EUN is usually 5 days.
3.What payment methods are accepted for TC1313-1P0EUN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-1P0EUN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-1P0EUN?
TC1313-1P0EUN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-1P0EUN 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 TC1313-1P0EUN?
For technical support, including TC1313-1P0EUN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-1P0EUN requirements.
6.How does Aetrix verify that TC1313-1P0EUN is sourced from the original manufacturer or authorized distributors?
All TC1313-1P0EUN 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 TC1313-1P0EUN meets industry standards.
7.What is the process for return or replacement of TC1313-1P0EUN?
All TC1313-1P0EUN units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-1P0EUN, 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 TC1313-1P0EUN part is unused and in its original packaging.
Return procedure for TC1313-1P0EUN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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