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Microchip Technology TC1313-1H0EUNTR
- Part No.:
- TC1313-1H0EUNTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1313-1H0EUNTR.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,640
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Product details
Overview
TC1313-1H0EUNTR 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 supports -40°C to +125°C junction temperature - deployed in portable medical instruments and USB-powered devices.
For engineers reviewing the TC1313-1H0EUNTR datasheet, TC1313-1H0EUNTR pinout, TC1313-1H0EUNTR application, or TC1313-1H0EUNTR equivalent, key selection criteria include independent shutdown control per rail, 2.0 MHz fixed-frequency PWM with automatic PFM transition, 137 mV typical LDO dropout at 200 mA, internal compensation, and UVLO/overtemperature/short-circuit protection.
Technical Context
The TC1313-1H0EUNTR implements a current-mode synchronous buck regulator with integrated P-channel and N-channel MOSFETs (RDS(on) = 450 mΩ each), operating at 2.0 MHz (±0.4 MHz) under heavy load and transitioning automatically to PFM mode below ~30 mA load to maintain 38 µA typical quiescent current. Its feedback reference is 0.8 V (±20 mV), enabling precise adjustable outputs from 0.8 V to 4.5 V.
The companion LDO features fixed 3.3 V output (±0.3%), 25 ppm/°C temperature coefficient, 62 dB PSRR at 100 Hz, and stable operation with only a 1 µF ceramic output capacitor. Both regulators share independent logic-level shutdown inputs (VIH ≥ 45% VIN, VIL ≤ 15% VIN) and are protected by undervoltage lockout (2.55 V nominal), thermal shutdown (165°C), and overcurrent limiting.
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 rails without external pre-regulation. |
| Buck Output Current | 500 mA continuous - sufficient for low-power microcontrollers or FPGA core supplies. |
| LDO Output Current | 300 mA continuous - powers I/O peripherals, sensors, or RF sections requiring low-noise bias. |
| Quiescent Current | 57 µA typical total - enables multi-week battery life in always-on portable instrumentation. |
| Switching Frequency | 2.0 MHz fixed (PWM mode) - allows use of small 4.7 µH inductors and compact 4.7 µF input/output capacitors. |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - minimizes power loss when VIN2 is only marginally above 3.3 V (e.g., 3.45 V). |
| Operating Junction Temp | -40°C to +125°C - qualified for industrial and automotive cabin-adjacent applications. |
Pinout & Package
TC1313-1H0EUNTR is housed in a 3×3 mm, 10-pin DFN package with exposed thermal pad (EP), optimized for high thermal conductivity and space-constrained PCB layouts. The EP must be soldered to AGND for thermal performance and electrical stability.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN2) | LDO shutdown control | Active-high logic input; enables/disables 3.3 V LDO independently - supports dynamic power sequencing. |
| 2 (VIN2) | LDO input supply | Accepts same input as VIN1; must be routed with minimal trace length to reduce noise coupling into analog ground. |
| 3 (VOUT2) | LDO regulated output | Delivers fixed 3.3 V; requires ≥1 µF ceramic capacitor to AGND for stability and transient response. |
| 4 (NC) | No connect | Unbonded pin; must remain unconnected and unpopulated on PCB. |
| 5 (AGND) | Analog ground reference | Separate ground return for feedback and reference circuits; must be tied to quiet analog ground plane, not PGND. |
| 6 (VFB/VOUT1) | Buck feedback or output | Configured as VFB for adjustable outputs (e.g., 1.8 V via resistor divider) or direct VOUT1 for fixed versions. |
| 7 (SHDN1) | Buck shutdown control | Independent active-high enable for buck regulator - allows selective core-rail power-down. |
| 8 (VIN1) | Buck input supply | Main power input for switching regulator; shares net with VIN2 but requires low-impedance path to bulk capacitance. |
| 9 (LX) | Switch node | High-slew-rate connection to external inductor; demands shortest possible trace and no vias to minimize EMI. |
| 10 (PGND) | Power ground return | High-current return path for buck switch; must be solidly connected to input/output capacitor grounds and isolated from AGND. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown per rail | Enables flexible power sequencing - e.g., keep LDO active for real-time clock while shutting down buck for CPU sleep. |
| Internal compensation | Eliminates need for external compensation components, reducing BOM count and layout complexity for both buck and LDO loops. |
| Automatic PWM-to-PFM transition | Maintains regulation across 0–500 mA load range without manual mode control or external circuitry. |
| Low-noise LDO output | 1.8 µV/√Hz output noise and 62 dB PSRR at 100 Hz ensure clean bias for ADCs, PLLs, and RF receivers. |
| Integrated protection suite | UVLO prevents startup below 2.55 V; thermal shutdown at 165°C and short-circuit current limiting protect against fault conditions. |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
|
Use Scenario: Battery-operated glucose meter with LCD display, Bluetooth LE radio, and precision analog front-end. IC Role / Device Role / Timing Role: TC1313-1H0EUNTR supplies 1.8 V to MCU core and 3.3 V to BLE transceiver and sensor interface - dual-rail generation from single Li-ion cell. Use Value: 57 µA total IQ extends battery life beyond 6 months; LDO's 1.8 µV/√Hz noise preserves ADC SNR; 137 mV dropout enables full 3.3 V output even at end-of-discharge (3.45 V). |
Use Scenario: Handheld oscilloscope probe powered exclusively via USB 5 V bus. IC Role / Device Role / Timing Role: TC1313-1H0EUNTR generates 1.8 V for FPGA configuration logic and 3.3 V for analog signal conditioning and USB PHY interface. Use Value: 2.0 MHz switching frequency permits ultra-compact 3×3 mm layout; internal compensation removes tuning risk; independent SHDN pins allow FPGA-controlled power gating of unused subsystems. |
| Industrial Handheld Terminals | Wearable Health Monitors |
|
Use Scenario: Ruggedized barcode scanner with cold-temperature operation requirement (-30°C ambient). IC Role / Device Role / Timing Role: TC1313-1H0EUNTR delivers 1.8 V to ARM Cortex-M4 and 3.3 V to imager interface and Wi-Fi module across -40°C to +125°C junction range. Use Value: Guaranteed operation to -40°C ensures reliability in freezer environments; thermal shutdown (165°C) protects against enclosure overheating; UVLO prevents brownout-induced firmware corruption. |
Use Scenario: Continuous ECG patch with 7-day battery life target and sub-µA standby current budget. IC Role / Device Role / Timing Role: TC1313-1H0EUNTR powers 1.8 V ultra-low-power MCU and 3.3 V analog front-end during active sensing, then enters deep-sleep with both rails disabled. Use Value: 0.05 µA shutdown current (combined VIN1/VIN2) minimizes leakage; PFM mode sustains regulation at 10 µA load with <40 µA IQ; 1 µF LDO output cap saves board area vs. traditional 10 µF solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBT | Triple-output (2 buck + 1 LDO), higher IQ (85 µA), 2.25 MHz switching, QFN-24 package | Supports additional voltage rail; larger footprint and higher quiescent current | Choose when third regulated rail (e.g., 1.2 V DDR I/O) is required and board space permits 4×4 mm QFN. |
| RT8059ZSP | Dual buck only (no integrated LDO), 1.5 MHz, 300 mA per channel, WDFN-10 package | Lacks LDO output - requires external LDO for noise-sensitive 3.3 V rail | Prefer when both rails are switching-derived and lowest possible cost is critical; adds design complexity for LDO integration. |
Compared with TPS65023BRSBT and RT8059ZSP, TC1313-1H0EUNTR uniquely balances ultra-low IQ (57 µA), integrated LDO noise performance, and compact 3×3 mm DFN - making it optimal for space- and battery-limited dual-rail systems where one rail demands low noise and the other high efficiency.
Availability
TC1313-1H0EUNTR is available at Aetrix Electronics and suitable for portable medical instruments, USB-powered test equipment, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for TC1313-1H0EUNTR 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 industrial, automotive, consumer, and communications markets with vertically integrated silicon and software platforms.
The TC1313 product line was designed specifically for space-constrained, battery-powered applications needing dual regulated rails - combining high-efficiency switching and low-noise linear regulation in minimal footprint to reduce system BOM and simplify power architecture.
FAQ
What output voltages does the TC1313-1H0EUNTR provide?
The TC1313-1H0EUNTR provides two regulated outputs: a synchronous buck regulator delivering an adjustable voltage (configured for 1.8 V in this variant) and a fixed 3.3 V low-dropout linear regulator (LDO). The buck output is set via external resistors connected to the VFB/VOUT1 pin, while the LDO output is factory-trimmed and requires no external programming.
Does the TC1313-1H0EUNTR require external compensation components?
No, the TC1313-1H0EUNTR does not require external compensation components. Both the buck regulator and LDO are internally compensated, eliminating the need for external capacitors or resistors in the feedback loop - simplifying design, reducing bill-of-materials count, and improving layout robustness across operating conditions.
How does the TC1313-1H0EUNTR manage efficiency across varying load conditions?
The TC1313-1H0EUNTR automatically transitions between fixed-frequency PWM mode (2.0 MHz) at heavy loads and pulse-frequency modulation (PFM) mode at light loads. This maintains >90% efficiency at 500 mA while reducing quiescent current to 38 µA in PFM - ensuring optimal power conversion across the full 0–500 mA load range without user intervention.
What is the minimum input voltage required for the TC1313-1H0EUNTR to regulate both outputs?
The TC1313-1H0EUNTR requires a minimum input voltage of 2.7 V, but actual minimum depends on output settings: VIN must exceed VOUT1 + 280 mV (buck dropout) and VOUT2 + 137 mV (LDO dropout). For 1.8 V and 3.3 V outputs, VIN must be ≥ 2.08 V and ≥ 3.437 V respectively - thus 3.44 V is the practical minimum to sustain both rails simultaneously.
Can the TC1313-1H0EUNTR operate with ceramic output capacitors only?
Yes, the TC1313-1H0EUNTR is fully compatible with ceramic output capacitors. The LDO requires only a 1 µF ceramic capacitor on VOUT2, and the buck regulator is stable with standard 4.7 µF ceramic input and output capacitors - enabling compact, low-ESR, and low-noise power designs without tantalum or electrolytic components.
TC1313-1H0EUNTR 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:
- 2.6V, 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
TC1313-1H0EUNTR FAQ
1.How can I place an order for TC1313-1H0EUNTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-1H0EUNTR 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 TC1313-1H0EUNTR reliable?
The price and inventory of TC1313-1H0EUNTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-1H0EUNTR is usually 5 days.
3.What payment methods are accepted for TC1313-1H0EUNTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-1H0EUNTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-1H0EUNTR?
TC1313-1H0EUNTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-1H0EUNTR 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 TC1313-1H0EUNTR?
For technical support, including TC1313-1H0EUNTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-1H0EUNTR requirements.
6.How does Aetrix verify that TC1313-1H0EUNTR is sourced from the original manufacturer or authorized distributors?
All TC1313-1H0EUNTR 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 TC1313-1H0EUNTR meets industry standards.
7.What is the process for return or replacement of TC1313-1H0EUNTR?
All TC1313-1H0EUNTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-1H0EUNTR, 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 TC1313-1H0EUNTR part is unused and in its original packaging.
Return procedure for TC1313-1H0EUNTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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