My Inquiry
My Account
Microchip Technology TC1313-ZA0EUNTR
- Part No.:
- TC1313-ZA0EUNTR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC1313-ZA0EUNTR.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,061
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TC1313-ZA0EUNTR 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 @ 500 mA (buck) and 3.3 V @ 300 mA (LDO), with 2.0 MHz fixed-frequency PWM operation, 57 µA total quiescent current, and -40°C to +125°C junction temperature range - optimized for battery-powered portable computing and USB devices.
For engineers reviewing the TC1313-ZA0EUNTR datasheet, TC1313-ZA0EUNTR pinout, TC1313-ZA0EUNTR application, or TC1313-ZA0EUNTR equivalent, key selection criteria include independent shutdown control per rail, automatic PWM-to-PFM mode transition under light load, 137 mV LDO dropout at 200 mA, internal compensation eliminating external loop components, and thermal/UVLO/short-circuit protection across both outputs.
Technical Context
The TC1313-ZA0EUNTR implements a current-mode synchronous buck regulator with integrated P- 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 to maintain ultra-low IQ. Its LDO uses a PMOS pass device with 137 mV typical dropout at 200 mA and supports only fixed-output voltages (1.5 V, 1.8 V, 2.5 V, 3.3 V).
Both regulators feature independent logic-level shutdown inputs (SHDN1/SHDN2), undervoltage lockout (2.55 V nominal, 200 mV hysteresis), and share AGND/PGND separation for noise isolation. The buck output is adjustable via external resistor divider (0.8–4.5 V) or factory-fixed; the LDO output is fixed at 3.3 V for this variant (ZA0EUNTR), confirmed by Microchip's standard part numbering convention where "ZA0" denotes 3.3 V LDO output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 500 mA max - supports processor core rails requiring high current at low voltage (e.g., 1.8 V). |
| LDO Output Current | 300 mA max - powers auxiliary circuits like I/O interfaces or sensors with minimal external capacitance (1 µF). |
| Total Quiescent Current | 57 µA typical - enables multi-day battery life in standby mode for portable medical instruments. |
| Buck Switching Frequency | 2.0 MHz fixed (1.6–2.4 MHz range) - allows use of small 4.7 µH inductors and reduces EMI filtering burden. |
| LDO Dropout Voltage | 137 mV typical @ 200 mA - permits operation with <100 mV headroom above output, minimizing power loss in low-VIN applications. |
| Operating Junction Temp | -40°C to +125°C - qualified for automotive cabin and industrial embedded environments without derating. |
| Protection Features | UVLO, overtemperature shutdown (165°C), short-circuit current limiting - eliminates need for external fault management circuitry. |
Pinout & Package
TC1313-ZA0EUNTR is packaged in a 3×3 mm, 10-pin DFN 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 |
|---|---|---|
| 1 SHDN2 | LDO shutdown control input | Active-high logic (>45% VIN); enables/disables 3.3 V LDO output independently of buck rail. |
| 2 VIN2 | LDO input supply | Accepts 2.7–5.5 V; must be tied directly to VIN1 with minimal trace length to reduce noise coupling. |
| 3 VOUT2 | LDO regulated output | Fixed 3.3 V output; requires ≥1 µF ceramic capacitor to AGND for stability and transient response. |
| 4 NC | No-connect terminal | Not internally bonded; must remain unconnected and un-routed on PCB. |
| 5 AGND | Analog reference ground | Reference node for feedback pins (VFB/VOUT1); must connect to quiet analog ground plane, separate from PGND. |
| 6 VFB/VOUT1 | Buck feedback or output sense | Configured as VOUT1 for fixed-output variants (e.g., ZA0EUNTR); connects directly to buck output node. |
| 7 SHDN1 | Buck shutdown control input | Active-high logic (>45% VIN); enables/disables 1.8 V buck output independently of LDO rail. |
| 8 VIN1 | Buck input supply | Accepts 2.7–5.5 V; shared with VIN2; requires local 4.7 µF ceramic input capacitor to PGND. |
| 9 LX | Switch node | Connects to inductor; carries high di/dt current - requires shortest possible trace to minimize EMI and voltage spikes. |
| 10 PGND | Power ground return | Return path for buck switching current; must tie to high-current ground plane with low-inductance connection. |
| EP | Exposed thermal pad | Electrically connected to AGND; must be soldered to AGND plane via ≥4 thermal vias for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown per regulator | Enables dynamic power sequencing - e.g., keep LDO active for real-time clock while shutting down buck during sleep. |
| Automatic PWM-to-PFM mode transition | Eliminates manual mode control; maintains regulation at <38 µA buck IQ under light loads without sacrificing transient response. |
| Internally compensated buck loop | Removes need for external compensation network - reduces BOM count and layout sensitivity for fixed-output variants. |
| Low-noise LDO with 62 dB PSRR @ 100 Hz | Suppresses switching ripple from buck stage, enabling clean analog/RF supply rails without additional LC filtering. |
| 100% duty-cycle capability | Permits buck operation with VIN only slightly above VOUT (e.g., 3.6 V → 3.3 V), extending battery runtime in single-cell Li-ion systems. |
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: TC1313-ZA0EUNTR provides 1.8 V for MCU core and 3.3 V for display driver and analog front-end, with independent shutdown enabling low-power sleep states. Use Value: 57 µA total IQ extends battery life beyond 100 hours in standby; 137 mV LDO dropout ensures stable 3.3 V output even at end-of-discharge (2.7 V input). | Use Scenario: USB bus-powered docking station supplying 1.8 V to FPGA configuration logic and 3.3 V to USB transceiver and level-shifting I/O. IC Role / Device Role / Timing Role: TC1313-ZA0EUNTR serves as primary dual-rail power source, accepting 4.5–5.5 V USB input and delivering tightly regulated, low-noise outputs. Use Value: 2.0 MHz switching frequency minimizes inductor size (<2 mm height); internal compensation reduces design cycle time versus discrete regulator solutions. |
| Industrial Handheld Terminal | Ultra-Thin Laptop Subsystem |
Use Scenario: Ruggedized barcode scanner with ARM Cortex-M7 MCU, imager sensor, and Bluetooth radio operating across -25°C to +70°C ambient. IC Role / Device Role / Timing Role: TC1313-ZA0EUNTR supplies 1.8 V core voltage and 3.3 V I/O voltage, with thermal shutdown (165°C) protecting against enclosure overheating. Use Value: -40°C to +125°C junction rating ensures reliability in sealed enclosures; UVLO prevents brownout-induced MCU resets during cold-start. | Use Scenario: Fanless ultrabook subsystem requiring compact, low-thermal-profile power solution for SoC and peripheral ICs. IC Role / Device Role / Timing Role: TC1313-ZA0EUNTR replaces two discrete regulators, delivering 1.8 V (core) and 3.3 V (I/O) from shared 3.3 V or 5 V rail in space-constrained 3×3 mm footprint. Use Value: DFN package with EP achieves 41°C/W θJA, enabling full 500 mA/300 mA load without heatsink; 1 µF LDO output cap saves board area versus typical 10 µF requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBT | Triple-output (2 buck + 1 LDO), higher IQ (100 µA), 2.25 MHz switching, QFN-32 package | Supports more complex power trees (e.g., DDR memory termination); larger footprint and higher cost | Choose when needing third rail or tighter output tolerance (±1% vs ±2.5%) |
| RT8059ZSP | Dual buck-only (no LDO), 600 mA/600 mA, 3 MHz, WDFN-10 package, no independent shutdown | Higher efficiency at medium loads but lacks LDO's low-noise, fast-transient capability for analog rails | Choose when both rails demand switching efficiency and noise sensitivity is low |
Compared with TPS65023BRSBT and RT8059ZSP, TC1313-ZA0EUNTR uniquely balances ultra-low IQ, integrated LDO noise suppression, and minimal 10-pin DFN footprint - making it optimal for space- and battery-life-constrained dual-rail systems where one rail requires clean, low-dropout regulation.
Availability
TC1313-ZA0EUNTR is available at Aetrix Electronics and suitable for portable medical instrumentation, USB-powered peripherals, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TC1313-ZA0EUNTR 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 global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on robust, long-lifecycle components for industrial and automotive markets.
The TC1313 product line delivers highly integrated dual-output regulators targeting portable and battery-operated systems where board space, quiescent current, and thermal performance are critical constraints.
FAQ
What output voltages does the TC1313-ZA0EUNTR provide?
The TC1313-ZA0EUNTR provides a fixed 1.8 V output from its synchronous buck regulator and a fixed 3.3 V output from its low-dropout linear regulator (LDO). The "ZA0" suffix in the part number explicitly denotes the 3.3 V LDO option, while the buck output is factory-set to 1.8 V for this variant. Both outputs are internally compensated and require no external feedback resistors.
Does the TC1313-ZA0EUNTR support independent enable control for each output?
Yes, the TC1313-ZA0EUNTR features two independent logic-level shutdown inputs: SHDN1 controls the buck regulator and SHDN2 controls the LDO. Each input activates at >45% of VIN and deactivates at <15% of VIN, allowing precise power sequencing - for example, enabling the LDO first to power bias circuitry before bringing up the buck rail.
What is the minimum input voltage required for the TC1313-ZA0EUNTR to regulate both outputs?
The TC1313-ZA0EUNTR requires a minimum input voltage of 2.7 V, but actual minimum depends on output voltage and dropout. For reliable regulation, VIN must exceed VOUT1 + 280 mV (buck dropout at 500 mA) and VOUT2 + 137 mV (LDO dropout at 200 mA). Thus, with 1.8 V and 3.3 V outputs, VIN ≥ 2.08 V and ≥ 3.437 V respectively - so 3.44 V is the practical minimum for simultaneous regulation.
Can the TC1313-ZA0EUNTR operate with ceramic output capacitors only?
Yes, the TC1313-ZA0EUNTR is fully compatible with ceramic output capacitors. The LDO requires only a single 1 µF ceramic capacitor on VOUT2, and the buck regulator is stable with standard 4.7 µF ceramic capacitors on both input and output. No tantalum or electrolytic capacitors are needed, reducing board area and improving reliability.
How does the TC1313-ZA0EUNTR manage efficiency at light load?
The TC1313-ZA0EUNTR automatically transitions its buck regulator from fixed-frequency PWM mode (2.0 MHz) to pulse-frequency modulation (PFM) mode when load drops below ~30 mA. This reduces switching losses and lowers total quiescent current to 38 µA for the buck stage alone, maintaining high efficiency without external mode-control circuitry.
TC1313-ZA0EUNTR 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:
- 3.3V, 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-ZA0EUNTR FAQ
1.How can I place an order for TC1313-ZA0EUNTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1313-ZA0EUNTR 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-ZA0EUNTR reliable?
The price and inventory of TC1313-ZA0EUNTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1313-ZA0EUNTR is usually 5 days.
3.What payment methods are accepted for TC1313-ZA0EUNTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1313-ZA0EUNTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1313-ZA0EUNTR?
TC1313-ZA0EUNTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1313-ZA0EUNTR 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-ZA0EUNTR?
For technical support, including TC1313-ZA0EUNTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1313-ZA0EUNTR requirements.
6.How does Aetrix verify that TC1313-ZA0EUNTR is sourced from the original manufacturer or authorized distributors?
All TC1313-ZA0EUNTR 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-ZA0EUNTR meets industry standards.
7.What is the process for return or replacement of TC1313-ZA0EUNTR?
All TC1313-ZA0EUNTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1313-ZA0EUNTR, 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-ZA0EUNTR part is unused and in its original packaging.
Return procedure for TC1313-ZA0EUNTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TC1313-ZA0EUNTR Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
