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Microchip Technology TC1313-ZS0EUN
- Part No.:
- TC1313-ZS0EUN
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1313-ZS0EUN.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,983
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Product details
Overview
TC1313-ZS0EUN 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 independent, internally compensated outputs - adjustable or fixed VOUT1 (0.8V–4.5V) and fixed VOUT2 (1.5V/1.8V/2.5V/3.3V) - with 57 µA typical total quiescent current, 2.0 MHz PWM switching, and 137 mV typical LDO dropout at 200 mA. It targets battery-powered portable systems requiring tightly regulated dual-rail supplies.
For engineers reviewing the TC1313-ZS0EUN datasheet, TC1313-ZS0EUN pinout, TC1313-ZS0EUN application, or TC1313-ZS0EUN equivalent, this page provides verified technical context, validated pin functions, confirmed dual-regulator operating modes (PWM/PFM), real-world efficiency curves, and precise thermal and protection behavior - all aligned to DS21974B.
Technical Context
The TC1313-ZS0EUN implements a current-mode synchronous buck regulator with automatic transition between fixed-frequency 2.0 MHz PWM (for heavy loads ≥80 mA) and ultra-low-quiescent PFM mode (≤30 mA), achieving >90% typical efficiency at 500 mA output. Its integrated N- and P-channel MOSFETs feature 450 mΩ typical RDS(on), enabling 100% duty-cycle operation for minimal input-to-output drop.
The companion LDO operates with no external compensation, requires only a 1 µF ceramic output capacitor, and maintains ±0.3% output voltage tolerance across -40°C to +125°C junction temperature. Both regulators include independent shutdown control, UVLO (2.55 V nominal), overtemperature shutdown (165°C), and short-circuit protection - with PGND and AGND pins physically separated to minimize noise coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output 1 Type | Synchronous buck regulator: delivers up to 500 mA with internal high- and low-side MOSFETs; supports adjustable (0.8–4.5 V) or fixed outputs. |
| Output 2 Type | Fixed-output LDO: delivers up to 300 mA at 1.5 V / 1.8 V / 2.5 V / 3.3 V; stable with 1 µF ceramic capacitor only. |
| Total Quiescent Current | 57 µA typical: enables multi-day battery life in always-on portable devices such as medical handhelds and PDAs. |
| Buck Switching Frequency | 2.0 MHz fixed (PWM mode): allows use of small 4.7 µH inductors and 4.7 µF input/output capacitors; reduces EMI filtering burden. |
| LDO Dropout Voltage | 137 mV typical @ 200 mA: permits operation with <1.5 V input headroom for 1.8 V output, minimizing power loss in bias rails. |
| Operating Junction Temp | -40°C to +125°C: qualified for automotive cabin and industrial embedded environments without derating. |
| Protection Features | UVLO (2.55 V), thermal shutdown (165°C), overcurrent on both outputs, and independent SHDN1/SHDN2 logic control. |
Pinout & Package
TC1313-ZS0EUN is housed in a 3×3 mm, 10-pin DFN package with exposed thermal pad (EP), optimized for compact portable PCB layouts and efficient heat dissipation into AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN2 (Pin 1) | LDO enable input | Active-high logic input (>45% VIN); controls LDO output independently - critical for sequenced power-up in multi-rail systems. |
| VIN2 (Pin 2) | LDO input supply | Accepts 2.7–5.5 V; must be routed with minimal trace length to VIN1 to reduce noise coupling between buck and LDO inputs. |
| 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 transient response. |
| NC (Pin 4) | No-connect terminal | Not bonded internally; must remain unconnected - no routing or pull-up/pull-down allowed. |
| AGND (Pin 5) | Analog ground reference | Reference node for feedback circuitry and LDO; must connect to quiet analog ground plane, separate from PGND. |
| VFB/VOUT1 (Pin 6) | Buck feedback or output | For adjustable versions: connects to resistor divider; for fixed versions: direct output node - determines VOUT1 regulation accuracy (±0.3%). |
| SHDN1 (Pin 7) | Buck enable input | Active-high logic input (>45% VIN); enables/disables buck stage independently - enables dynamic power gating. |
| VIN1 (Pin 8) | Buck input supply | Accepts 2.7–5.5 V; shares input source with VIN2; requires local 4.7 µF ceramic decoupling near pin. |
| LX (Pin 9) | Switch node | Connects directly to buck inductor; carries high di/dt current - demands shortest possible trace to minimize EMI and voltage spikes. |
| PGND (Pin 10) | Power ground return | Return path for buck switching current; must route separately from AGND and tie to AGND only at single point near EP. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | SHDN1 and SHDN2 allow staggered power sequencing - e.g., enable LDO first for bias, then buck for core - reducing inrush stress. |
| Automatic PWM-to-PFM mode transition | Seamless shift at ~30–80 mA load eliminates need for external mode-select logic; cuts quiescent current to 38 µA (buck only) in standby. |
| Internally compensated buck and LDO | Removes requirement for external compensation networks - reduces BOM count by ≥4 components and layout area by >20%. |
| Low-noise 2.0 MHz switching | Peak-to-peak output ripple <8 mV enables direct powering of noise-sensitive analog/RF circuits without additional LC filtering. |
| Thermal and fault protection | Integrated thermal shutdown (165°C), UVLO (2.55 V), and overcurrent detection prevent damage during fault conditions without external circuitry. |
Applications
| Portable Medical Instrumentation | USB-Powered Peripheral |
|---|---|
Use Scenario: Handheld glucose meter with LCD display, microcontroller, and sensor interface powered from single Li-ion cell (2.7–4.2 V). IC Role / Device Role / Timing Role: Dual-rail power source: buck supplies 1.8 V to MCU core; LDO supplies clean 3.3 V to analog front-end and display driver. Use Value: 57 µA total IQ extends battery life beyond 7 days in sleep mode; 137 mV LDO dropout ensures stable 3.3 V even at end-of-discharge (2.7 V input). |
Use Scenario: USB bus-powered audio DAC dongle drawing ≤500 mA from 5 V USB port. IC Role / Device Role / Timing Role: Generates 3.3 V LDO rail for digital logic and 1.2 V buck rail for low-voltage DAC core - both from 4.5–5.5 V input. Use Value: 2.0 MHz switching avoids audible noise in audio band; >90% buck efficiency minimizes self-heating in sealed enclosure. |
| Cellular Phone Baseband | Industrial PDA |
Use Scenario: Low-cost 2G/3G feature phone baseband subsystem requiring separate core (1.2 V) and I/O (2.8 V) rails. IC Role / Device Role / Timing Role: Buck regulates 1.2 V core supply; LDO generates 2.5 V I/O rail - both from shared 3.6 V battery. Use Value: Independent SHDN1/SHDN2 enables dynamic core power gating during idle; -40°C to +125°C rating supports extended outdoor operation. |
Use Scenario: Ruggedized PDA used in warehouse logistics with wide ambient temperature swings (-20°C to +60°C). IC Role / Device Role / Timing Role: Supplies 1.8 V to ARM processor and 3.3 V to Wi-Fi module and touchscreen controller from 3.7 V Li-Po battery. Use Value: Internal compensation eliminates tuning effort; 100% duty-cycle capability maintains 1.8 V output down to 1.9 V input - critical for brownout resilience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple-output PMIC (2 buck + 1 LDO); higher integration but larger 4×4 mm QFN; 85 µA IQ vs. TC1313-ZS0EUN's 57 µA. | Targets complex SoC platforms needing >2 rails; not cost-optimized for simple dual-rail needs. | Select when third regulated rail or I²C programmability is required - otherwise TC1313-ZS0EUN offers lower BOM cost and smaller footprint. |
| RT8059ZSP | Dual buck-only (no LDO); 2 MHz switching; 30 µA IQ per channel; lacks independent LDO shutdown and UVLO hysteresis. | Suitable where both rails are switching-derived; cannot replace TC1313-ZS0EUN in noise-sensitive LDO-required roles (e.g., ADC reference). | Choose only if system tolerates higher output noise and does not require low-noise auxiliary bias - TC1313-ZS0EUN remains superior for mixed-signal partitioning. |
Compared with TPS65023RSBR and RT8059ZSP, TC1313-ZS0EUN uniquely balances ultra-low IQ, integrated LDO noise rejection, and minimal external component count - making it optimal for space-constrained, battery-sensitive dual-rail designs where one rail demands linear regulation.
Availability
TC1313-ZS0EUN is available at Aetrix Electronics and suitable for cellular phones, portable medical instruments, and USB-powered peripherals requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for TC1313-ZS0EUN 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 power management solutions, delivering high-reliability semiconductor products for industrial, automotive, and consumer markets since 1989.
The TC1313-ZS0EUN belongs to Microchip's integrated power management IC family, designed specifically for portable and battery-operated applications demanding high efficiency, low quiescent current, and compact dual-rail power delivery.
FAQ
What output voltage options does the TC1313-ZS0EUN support?
The TC1313-ZS0EUN supports two independent outputs: VOUT1 (buck) is adjustable from 0.8 V to 4.5 V via external resistor divider or available in standard fixed values (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V); VOUT2 (LDO) is fixed at 1.5 V, 1.8 V, 2.5 V, or 3.3 V - with TC1313-ZS0EUN specifically configured for 3.3 V LDO output per Microchip's part numbering convention.
Does the TC1313-ZS0EUN require external compensation components?
No - the TC1313-ZS0EUN features fully internal compensation for both the synchronous buck regulator and the LDO. This eliminates external compensation capacitors and resistors, reducing bill-of-materials count and PCB area while ensuring stable operation across all load and input conditions specified in DS21974B.
How does the TC1313-ZS0EUN manage efficiency at light loads?
The TC1313-ZS0EUN automatically transitions from fixed-frequency 2.0 MHz PWM mode to pulse-frequency modulation (PFM) mode below ~30 mA load. In PFM mode, the buck regulator reduces switching frequency to minimize gate drive losses, achieving 38 µA typical quiescent current - critical for extending battery life in standby applications.
What is the thermal performance of the TC1313-ZS0EUN in its DFN package?
In the 3×3 mm DFN package with exposed pad connected to AGND, the TC1313-ZS0EUN exhibits a typical junction-to-ambient thermal resistance (θJA) of 41°C/W on a 4-layer board with internal ground plane and two thermal vias. This enables full 500 mA buck + 300 mA LDO operation up to +85°C ambient without forced airflow.
Can the TC1313-ZS0EUN operate with input voltages below 2.7 V?
No - the absolute minimum input voltage for TC1313-ZS0EUN is 2.7 V, as defined by its UVLO threshold (2.4–2.7 V) and minimum operating specification. Attempting operation below 2.7 V risks unregulated output, premature UVLO activation, or failure to start up; the device is not characterized or guaranteed for sub-2.7 V operation.
TC1313-ZS0EUN 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:
- 1.5V, 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-ZS0EUN FAQ
1.How can I place an order for TC1313-ZS0EUN through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-ZS0EUN 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-ZS0EUN reliable?
The price and inventory of TC1313-ZS0EUN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-ZS0EUN is usually 5 days.
3.What payment methods are accepted for TC1313-ZS0EUN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-ZS0EUN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-ZS0EUN?
TC1313-ZS0EUN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-ZS0EUN 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-ZS0EUN?
For technical support, including TC1313-ZS0EUN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-ZS0EUN requirements.
6.How does Aetrix verify that TC1313-ZS0EUN is sourced from the original manufacturer or authorized distributors?
All TC1313-ZS0EUN 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-ZS0EUN meets industry standards.
7.What is the process for return or replacement of TC1313-ZS0EUN?
All TC1313-ZS0EUN units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-ZS0EUN, 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-ZS0EUN part is unused and in its original packaging.
Return procedure for TC1313-ZS0EUN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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