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Texas Instruments UCC383TDKTTT-5
- Part No.:
- UCC383TDKTTT-5
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
UCC383TDKTTT-5.pdf
- Description:
- IC REG LIN 5V 3A DDPAK/TO263-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,278
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Product details
Overview
UCC383TDKTTT-5 from Texas Instruments is a fixed 5-V, 3-A positive linear series pass LDO regulator in TO-263-3 (DDPAK) package, featuring 0.45 V typical dropout at 3 A, <650 µA quiescent current irrespective of load, and integrated thermal shutdown and short-circuit protection with 3% duty-cycle pulsed fault limiting. It serves as a primary voltage rail regulator in industrial power supplies requiring stable low-noise 5-V output under high-current transient loads.
For engineers reviewing the UCC383TDKTTT-5 datasheet, UCC383TDKTTT-5 pinout, UCC383TDKTTT-5 application, or UCC383TDKTTT-5 equivalent, key selection criteria include dropout performance at 3 A, thermal behavior over 0°C to 70°C, reverse leakage (<75 µA), UVLO threshold (2.5–3 V), and compatibility with standard TO-263-3 PCB footprints and thermal pads.
Technical Context
The UCC383TDKTTT-5 implements a BiCMOS N-channel MOSFET series pass element driven by an internal charge pump (VPUMP) to achieve low RDS(on), enabling 0.45 V dropout at 3 A. Its error amplifier references a 1.25-V internal bandgap and regulates output without requiring minimum output capacitance due to internal compensation.
Short-circuit protection operates via fixed 750 µs tON followed by tOFF = 32 × tON, enforcing 3% average duty cycle during sustained overload; thermal shutdown activates at 165°C junction temperature with 20°C hysteresis. The device is specified for 0°C to 70°C ambient operation and supports logic-level shutdown only in adjustable variants-not applicable to this fixed 5-V version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% at room temperature; ensures stable logic supply for microcontrollers and FPGAs without external feedback. |
| Dropout Voltage | 0.45 V typical at 3 A load; enables operation from 5.45 V input, minimizing wasted headroom in battery- or DC-DC-derived rails. |
| Quiescent Current | <650 µA across full load range; maintains efficiency in always-on subsystems without compromising regulation. |
| Short-Circuit Duty Cycle | 3% fixed average; limits average power dissipation during fault to ~1/33 of peak, reducing heatsink requirements. |
| Operating Temperature | 0°C to 70°C ambient; suitable for commercial/industrial equipment enclosures without forced cooling. |
| Reverse Leakage | <75 µA when VIN < VOUT; prevents backfeed in multi-rail systems during power sequencing or standby. |
| UVLO Threshold | 2.5–3.0 V; blocks regulation until input stabilizes above valid operating range, avoiding brownout instability. |
Pinout & Package
UCC383TDKTTT-5 uses the TO-263-3 (DDPAK) thermally enhanced surface-mount package with exposed metal pad for PCB heat sinking. Pin 1 = VOUT, Pin 2 = GND, Pin 3 = VIN. The package complies with JEDEC MO-178, Level-2-260°C-1-year moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output terminal | Delivers fixed 5-V output; connects directly to load and local bypass capacitor; electrically tied to exposed thermal pad. |
| GND | Reference ground node | Common return for internal bias, error amplifier, and protection circuitry; must be low-impedance connection to PCB ground plane. |
| VIN | Unregulated input supply | Accepts 5.45–9 V input; requires ≥1 µF low-ESL/ESR ceramic capacitor to GND close to pin for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Low-dropout architecture | 0.45 V dropout at full 3-A load enables use with minimal input headroom, reducing upstream converter overhead. |
| Thermal shutdown with hysteresis | 165°C trip / 145°C recovery prevents latch-up during intermittent overloads and allows safe auto-recovery. |
| Fixed-frequency short-circuit pulsing | 750 µs on-time + 24 ms off-time yields consistent 3% duty cycle, enabling predictable fault-power budgeting. |
| No minimum output capacitance | Internally compensated design eliminates need for ≥10 µF output cap, simplifying layout and supporting ceramic-only solutions. |
| Reverse voltage sensing | Blocks conduction when VIN < VOUT, preventing backfeed in hot-swap or redundant supply configurations. |
Applications
| Industrial PLC I/O Module Power | Embedded Controller Core Rail |
|---|---|
Use Scenario: Supplies 5-V logic and interface circuitry in programmable logic controller modules operating in uncontrolled ambient environments. IC Role / Device Role / Timing Role: Primary 5-V LDO regulator delivering clean, stable voltage to FPGA configuration banks, RS-485 transceivers, and ADC reference circuits. Use Value: 0.45 V dropout preserves margin when powered from 5.5-V intermediate bus; thermal shutdown protects against field wiring faults without system-level intervention. |
Use Scenario: Powers core logic and memory interfaces of ARM-based industrial controllers requiring low-noise, high-current 5-V rail. IC Role / Device Role / Timing Role: Main system regulator feeding processor VCC_IO and peripheral voltage domains with tight line/load regulation (≤20 mV). Use Value: <650 µA quiescent current minimizes standby power; reverse leakage <75 µA prevents backfeed during partial system sleep states. |
| Test Equipment Signal Chain Supply | Medical Diagnostic Sensor Interface |
Use Scenario: Provides regulated 5-V bias to precision op-amps, DACs, and analog front-ends in automated test equipment. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from digital switching noise; supports fast transient response to dynamic load steps. Use Value: Internal compensation and no-minimum-COUT allow use of small, low-ESR ceramic capacitors for optimal high-frequency PSRR. |
Use Scenario: Powers isolated sensor signal conditioning circuits in portable diagnostic devices with strict thermal and reliability constraints. IC Role / Device Role / Timing Role: Safety-critical 5-V rail for analog sensor amplifiers and isolation barrier drivers; must survive continuous short-circuit events. Use Value: 3% duty-cycle short-circuit limiting reduces fault energy by >95%, enabling passive heatsinking and eliminating need for fuse coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | Ultra-low-noise (4.7 µVRMS) 1-A LDO with 20-µA IQ; not rated for 3-A load or 0.45-V dropout at high current. | Suitable for noise-sensitive analog rails but cannot replace UCC383TDKTTT-5 in high-current digital power roles. | Select only if load ≤1 A and PSRR/noise dominate over current capacity and dropout. |
| MCP1703T-5002E/MB | 500-mA, 5-V fixed LDO in SOT-223; 600-mV dropout at 250 mA; no thermal or short-circuit pulsing protection. | Targeted at low-power MCU peripherals; lacks fault robustness and current capability for industrial 3-A loads. | Use only in space-constrained, low-current designs where cost and footprint outweigh fault tolerance needs. |
Compared with TPS7A4700RGWR and MCP1703T-5002E/MB, UCC383TDKTTT-5 uniquely delivers 3-A current, sub-0.5-V dropout, and active pulsed short-circuit protection in a thermally optimized TO-263 package-making it irreplaceable for high-reliability, high-current industrial LDO applications.
Availability
UCC383TDKTTT-5 is available at Aetrix Electronics and suitable for industrial PLCs, embedded controller power rails, test equipment analog supplies, and medical sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for UCC383TDKTTT-5 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability linear regulators and power solutions.
The UCC383 series was designed specifically for industrial-grade, high-current LDO applications demanding robust fault protection, low dropout, and thermal resilience-targeting power rails in programmable automation, instrumentation, and ruggedized computing.
FAQ
What is the maximum output current specification for UCC383TDKTTT-5?
UCC383TDKTTT-5 is rated for continuous 3-A output current under specified thermal conditions. Peak current limit is 4–10 A depending on test conditions, but sustained operation beyond 3 A triggers short-circuit pulsing. Derating is required above 70°C ambient or with inadequate PCB copper area for heatsinking.
Does UCC383TDKTTT-5 support logic-level shutdown functionality?
No, UCC383TDKTTT-5 does not support shutdown. Shutdown capability is exclusive to the 5-pin adjustable variants (e.g., UCC383TD-ADJ) via the CT pin. The UCC383TDKTTT-5 is a 3-pin fixed-output device with no dedicated enable or shutdown terminal.
What is the recommended input voltage range for UCC383TDKTTT-5?
UCC383TDKTTT-5 operates with input voltages from (VOUT + VDROPOUT) up to 9 V. For reliable 3-A operation, minimum input is 5.45 V (5 V + 0.45 V dropout); absolute maximum is 9 V. Exceeding 9 V risks permanent damage per absolute maximum ratings.
Can UCC383TDKTTT-5 be used with ceramic output capacitors only?
Yes, UCC383TDKTTT-5 is internally compensated and requires no minimum output capacitance. Ceramic capacitors (e.g., 10–47 µF, X7R, low-ESR) are fully compatible and recommended for optimal transient response and board space savings.
What thermal considerations apply to UCC383TDKTTT-5 in TO-263-3 package?
UCC383TDKTTT-5 has θJC = 3°C/W. To maintain TJ ≤ 150°C at 3 A with 0.45 V dropout (1.35 W dissipation), θCA must be ≤ 71°C/W. A 5-in² 1-oz copper pad achieves ~60°C/W; larger copper or external heatsink is needed for higher ambient or derated operation.
UCC383TDKTTT-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 3A
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- 650 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-3)
UCC383TDKTTT-5 FAQ
1.How can I place an order for UCC383TDKTTT-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC383TDKTTT-5 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 UCC383TDKTTT-5 reliable?
The price and inventory of UCC383TDKTTT-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC383TDKTTT-5 is usually 5 days.
3.What payment methods are accepted for UCC383TDKTTT-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC383TDKTTT-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC383TDKTTT-5?
UCC383TDKTTT-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC383TDKTTT-5 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 UCC383TDKTTT-5?
For technical support, including UCC383TDKTTT-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC383TDKTTT-5 requirements.
6.How does Aetrix verify that UCC383TDKTTT-5 is sourced from the original manufacturer or authorized distributors?
All UCC383TDKTTT-5 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 UCC383TDKTTT-5 meets industry standards.
7.What is the process for return or replacement of UCC383TDKTTT-5?
All UCC383TDKTTT-5 units undergo pre-shipment inspection (PSI). If there is an issue with UCC383TDKTTT-5, 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 UCC383TDKTTT-5 part is unused and in its original packaging.
Return procedure for UCC383TDKTTT-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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