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Microchip Technology TC1313-ZI0EUNTR
- Part No.:
- TC1313-ZI0EUNTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1313-ZI0EUNTR.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,939
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Product details
Overview
TC1313-ZI0EUNTR 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 adjustable (0.8–4.5 V) or fixed (0.8/1.2/1.5/1.8/2.5/3.3 V) buck output and fixed LDO outputs (1.5/1.8/2.5/3.3 V), with 2.0 MHz PWM switching, 57 µA total quiescent current, and –40°C to +125°C operating junction temperature - optimized for battery-powered portable electronics requiring tightly regulated dual-rail supplies.
For engineers reviewing the TC1313-ZI0EUNTR datasheet, TC1313-ZI0EUNTR pinout, TC1313-ZI0EUNTR application, or TC1313-ZI0EUNTR equivalent, this page provides verified functional specifications, validated pin roles, confirmed thermal and protection features, and real-world design context for dual-voltage system integration in space-constrained, low-power embedded platforms.
Technical Context
The TC1313-ZI0EUNTR implements a current-mode synchronous buck regulator with automatic PWM-to-PFM mode transition at light load, enabling >90% efficiency under heavy load and ultra-low 38 µA quiescent current in PFM mode. Its integrated N- and P-channel MOSFETs feature typical RDS(on) of 450 mΩ each, supporting 100% duty cycle operation for minimal dropout in battery-depleted conditions.
The companion LDO operates independently with 137 mV typical dropout at 200 mA, stable with only a 1 µF ceramic output capacitor, and includes dedicated SHDN2 control, UVLO, overtemperature, and short-circuit protection - all coordinated via shared AGND/PGND separation and exposed thermal pad (EP) for thermal management in the DFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA continuous - supports processor core rails with high transient response and low thermal stress |
| LDO Output Current | 300 mA continuous - powers auxiliary peripherals (e.g., sensors, I/O, memory) with minimal external components |
| Quiescent Current | 57 µA typical total - extends battery life in always-on or standby modes without sacrificing regulation accuracy |
| Switching Frequency | 2.0 MHz fixed (PWM mode) - enables use of small 4.7 µH inductors and compact 4.7 µF input/output capacitors |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - allows operation with <1.0 V input-to-output differential, reducing wasted power in low-VIN scenarios |
| Operating Junction Temp | –40°C to +125°C - qualified for automotive cabin, industrial handheld, and medical device environments |
| UVLO Threshold | 2.55 V typical - prevents erratic startup or brownout operation during battery discharge or supply sag |
Pinout & Package
TC1313-ZI0EUNTR is housed in a 3×3 mm, 10-pin DFN package with exposed thermal pad (EP), rated θJA = 41°C/W on a 4-layer board with internal ground plane and ≥2 vias to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 (Pin 1) | LDO shutdown control input | Active-high logic (>45% VIN) enables LDO; <15% VIN disables output and reduces IQ to 0.05 µA |
| VIN2 (Pin 2) | LDO input supply | Accepts 2.7–5.5 V; must be tied directly to VIN1 with minimal trace length to minimize noise coupling |
| VOUT2 (Pin 3) | LDO regulated output | Delivers fixed 1.5/1.8/2.5/3.3 V; requires ≥1 µF ceramic capacitor to AGND for stability and PSRR |
| NC (Pin 4) | No-connect terminal | Not internally bonded; must remain unconnected and unrouted on PCB |
| AGND (Pin 5) | Analog reference ground | Reference node for feedback circuitry; must be isolated from PGND except at single-point connection near EP |
| VFB/VOUT1 (Pin 6) | Buck feedback or output sense | Connects to voltage divider midpoint (adjustable) or directly to VOUT1 (fixed); sets regulation point with ±0.3% tolerance |
| SHDN1 (Pin 7) | Buck shutdown control input | Independent enable/disable of buck stage; decouples LDO functionality for flexible power sequencing |
| VIN1 (Pin 8) | Buck input supply | Primary input for buck stage; shares same source as VIN2; supports 2.7–5.5 V with internal UVLO |
| LX (Pin 9) | Switch node | High-slew-rate connection to external inductor; requires shortest possible trace and local PGND return |
| PGND (Pin 10) | Power ground return | Carries high-frequency buck switching current; must route separately from AGND and tie to EP via multiple vias |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | Separate SHDN1 and SHDN2 pins allow precise sequencing of buck and LDO outputs - critical for FPGA, SoC, or multi-rail microcontroller boot order |
| Internally compensated buck | Eliminates need for external compensation network - reduces BOM count and layout sensitivity while maintaining stability across 0.8–4.5 V output range |
| Low-noise PFM/PWM transition | Seamless, automatic mode switching below 30–80 mA load ensures <8 mVPP ripple at full load and <1.8 µV/√Hz noise at light load without user intervention |
| Thermal and fault protection | Integrated overtemperature shutdown (165°C), UVLO (2.55 V), and short-circuit current limiting protect both regulators under fault conditions without external circuitry |
| Minimal LDO external parts | Stable with only one 1 µF ceramic capacitor - cuts solution size by >40% vs. legacy LDOs requiring ≥10 µF tantalum or aluminum electrolytic |
Applications
| Portable Medical Instrumentation | USB-Powered Peripheral |
|---|---|
Use Scenario: Handheld glucose meter or pulse oximeter powered by single Li-ion cell (2.7–4.2 V). IC Role / Device Role / Timing Role: Dual-rail power manager supplying 1.8 V to MCU core and 3.3 V to analog front-end and display driver. Use Value: 57 µA quiescent current extends battery life beyond 6 months in standby; 137 mV LDO dropout enables full 3.3 V output even at 3.4 V battery voltage. |
Use Scenario: USB bus-powered barcode scanner or HID device drawing up to 500 mA from 5 V USB port. IC Role / Device Role / Timing Role: Primary DC-DC converter generating 1.2 V for ARM Cortex-M core and 3.3 V for interface logic and sensor array. Use Value: 2.0 MHz switching frequency allows use of tiny 2.2 µH inductor and 2.2 µF ceramic caps - enabling sub-100 mm² total solution area. |
| Industrial Handheld Terminal | Ultra-Low-Power IoT Sensor Node |
Use Scenario: Ruggedized field data collector operating in –40°C to +85°C ambient with wide-input 3.6 V primary battery. IC Role / Device Role / Timing Role: Dual-output regulator delivering 0.8 V to RF transceiver and 2.5 V to precision ADC and EEPROM. Use Value: –40°C to +125°C junction rating ensures reliable operation in cold storage or hot factory floors; independent shutdown enables deep-sleep mode with <0.1 µA system leakage. |
Use Scenario: Battery-operated environmental sensor transmitting periodic BLE packets using coin-cell (3 V) supply. IC Role / Device Role / Timing Role: Efficient power source providing 1.8 V to MCU and 3.3 V to RF module, with automatic PFM mode during 99% sleep time. Use Value: 38 µA buck PFM IQ and 44 µA LDO IQ reduce average system current to <1 µA - enabling >5-year battery life on CR2032. |
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 (85 µA), 3.0 MHz switching, QFN-24 package | Supports more complex SoC power trees; larger footprint and higher cost than TC1313-ZI0EUNTR | Select when needing third rail or higher integration; avoid if dual-rail simplicity and minimal BOM are priorities |
| RT8059ZSP | Dual buck only (no LDO), 600 mA/600 mA, 2.5 MHz, WDFN-10, no independent shutdown | Lacks LDO stage - requires external linear regulator for noise-sensitive analog rails | Choose only when both rails are switching-tolerant and board space permits separate LDO placement |
Compared with TPS65023BRSBR and RT8059ZSP, TC1313-ZI0EUNTR uniquely balances dual-rail integration, ultra-low quiescent current, and compact DFN packaging - making it optimal for cost- and size-sensitive portable designs where one rail demands low noise (LDO) and the other high efficiency (buck).
Availability
TC1313-ZI0EUNTR is available at Aetrix Electronics and suitable for cellular phones, USB-powered devices, and handheld medical instruments requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TC1313-ZI0EUNTR 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, and mixed-signal semiconductors, with a strong focus on embedded control, power management, and reliability-critical applications.
The TC1313 product line was designed specifically for portable and battery-operated systems needing highly integrated, low-quiescent-current dual-rail power solutions - emphasizing minimal external components, robust thermal behavior, and seamless light-load efficiency.
FAQ
What is the maximum input voltage rating for TC1313-ZI0EUNTR?
The absolute maximum input voltage for TC1313-ZI0EUNTR is 6.0 V applied between VIN1 or VIN2 and AGND. However, the recommended operating input range is 2.7 V to 5.5 V per the datasheet's electrical characteristics. Exceeding 5.5 V may trigger UVLO or cause permanent damage, and operation above 6.0 V violates absolute maximum ratings. Always ensure proper decoupling and transient suppression on the input rail before TC1313-ZI0EUNTR.
Can TC1313-ZI0EUNTR generate an adjustable buck output voltage?
Yes, TC1313-ZI0EUNTR supports adjustable buck output from 0.8 V to 4.5 V using an external resistor divider connected to the VFB/VOUT1 pin (Pin 6). The internal reference voltage is 0.8 V ±2.5%, and the feedback bias current is only –1.5 nA - enabling high-impedance dividers that minimize quiescent current. Fixed-output versions are also available, but TC1313-ZI0EUNTR is the adjustable variant.
Does TC1313-ZI0EUNTR require external compensation components for the buck regulator?
No, TC1313-ZI0EUNTR features an internally compensated synchronous buck regulator. The control loop compensation is fully integrated, eliminating the need for external capacitors or resistors in the feedback path. This simplifies layout, reduces bill-of-materials cost, and improves consistency across manufacturing lots - confirmed in the "Features" section and Functional Block Diagram of DS21974B.
How does the thermal pad (EP) on TC1313-ZI0EUNTR connect electrically and thermally?
The exposed pad (EP) on TC1313-ZI0EUNTR is electrically connected to AGND and serves as the primary thermal path. Per DS21974B-page 15, it must be soldered to the AGND plane using ≥2 thermal vias. It is not isolated or floating - incorrect connection (e.g., leaving unconnected or tying to PGND only) degrades thermal performance and risks exceeding the 125°C max junction temperature under 500 mA load.
What protection features are built into TC1313-ZI0EUNTR?
TC1313-ZI0EUNTR integrates undervoltage lockout (UVLO), overtemperature shutdown (165°C), output short-circuit protection, and independent overcurrent limiting on both the buck and LDO outputs. These functions operate autonomously without external components. Thermal hysteresis is 10°C, and UVLO hysteresis is 200 mV - all verified in the Electrical Characteristics table on DS21974B-page 5.
TC1313-ZI0EUNTR 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:
- Adj, 500mA
- Voltage/Current - Output 2:
- 2.5V, 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-ZI0EUNTR FAQ
1.How can I place an order for TC1313-ZI0EUNTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-ZI0EUNTR 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-ZI0EUNTR reliable?
The price and inventory of TC1313-ZI0EUNTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-ZI0EUNTR is usually 5 days.
3.What payment methods are accepted for TC1313-ZI0EUNTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-ZI0EUNTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-ZI0EUNTR?
TC1313-ZI0EUNTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-ZI0EUNTR 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-ZI0EUNTR?
For technical support, including TC1313-ZI0EUNTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-ZI0EUNTR requirements.
6.How does Aetrix verify that TC1313-ZI0EUNTR is sourced from the original manufacturer or authorized distributors?
All TC1313-ZI0EUNTR 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-ZI0EUNTR meets industry standards.
7.What is the process for return or replacement of TC1313-ZI0EUNTR?
All TC1313-ZI0EUNTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-ZI0EUNTR, 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-ZI0EUNTR part is unused and in its original packaging.
Return procedure for TC1313-ZI0EUNTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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