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Texas Instruments TPS5430MDDAREPG4
- Part No.:
- TPS5430MDDAREPG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS5430MDDAREPG4.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,695
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Product details
Overview
TPS5430MDDAREPG4 from Texas Instruments is a 3-A, wide-input-range (5.5 V to 36 V), fixed 500-kHz synchronous step-down DC/DC converter with integrated 110-mΩ high-side N-channel MOSFET, internal compensation, and 1.22 V reference (±1.5% initial accuracy). It delivers regulated 5-V output at up to 3 A continuous current in industrial power supplies and battery-charged LED systems.
For engineers reviewing the TPS5430MDDAREPG4 datasheet, TPS5430MDDAREPG4 pinout, TPS5430MDDAREPG4 application, or TPS5430MDDAREPG4 equivalent, key selection criteria include input voltage range (5.5–36 V), thermal performance in SOIC-8 PowerPAD™, cycle-by-cycle overcurrent protection, UVLO threshold (5.3 V), and junction temperature rating (–55°C to 125°C).
Technical Context
The TPS5430MDDAREPG4 uses voltage-mode PWM control with an internally trimmed 1.221-V bandgap reference and type-3 internal compensation, enabling stable operation without external loop components. Its feed-forward gain of 25 maintains constant power-stage gain across input voltage variations, improving transient response.
It integrates undervoltage lockout (330-mV hysteresis), thermal shutdown (135°C trip, 14°C hysteresis), hiccup-mode overcurrent limiting (16-ms hiccup time), and active-high enable with 1.3-V turn-on threshold. The BOOT–PH node drives the high-side MOSFET gate via a 0.01-µF ceramic capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5 V to 36 V - supports 12-V/24-V distributed systems and automotive battery inputs without pre-regulation. |
| Output Current | 3 A continuous (4 A peak) - sustains full load under worst-case thermal conditions on 4-layer PCBs (θJA = 26°C/W). |
| Switching Frequency | 500 kHz (±100 kHz) - enables compact 15-µH inductors and low-profile filter design per TI application note. |
| Reference Accuracy | ±1.5% initial (±1.9% over –55°C to 125°C) - ensures tight output regulation for precision 5-V or adjustable rails. |
| rDS(on) | 110 mΩ (TJ = 25°C) - minimizes conduction loss; rises to 230 mΩ at 125°C, requiring thermal derating above 85°C ambient. |
| Quiescent Current | 4.4 mA (active), 18 µA (shutdown) - enables low-power standby modes in battery-backed systems. |
| UVLO Threshold | 5.3 V start / 5.0 V stop (330-mV hysteresis) - prevents erratic startup during brownout or cold-cranking events. |
Pinout & Package
TPS5430MDDAREPG4 is housed in an 8-pin thermally enhanced SOIC PowerPAD™ (DDA) package with exposed thermal pad (PowerPAD™) requiring solder connection to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ENA | Enable control input | Active-high logic input; ≥1.3 V enables regulation, ≤0.5 V disables with 18-µA shutdown current. |
| GND | Power and signal ground | Must be connected to exposed thermal pad and system ground plane via multiple vias for thermal dissipation and noise immunity. |
| VIN | Main input supply | Accepts 5.5–36 V; requires local 10-µF X5R/X7R ceramic bypass capacitor placed adjacent to pin. |
| PH | High-side MOSFET source | Switching node connecting to inductor and catch diode; layout must minimize loop area to reduce EMI. |
| VSENSE | Feedback input | Senses resistor-divider output voltage; regulates to 1.221 V reference; no external compensation required. |
| NC | No connect | Pins 2 and 3 are unconnected internally; must remain unpopulated or floating - no routing or stitching. |
| BOOT | Bootstrap supply | Connects via 0.01-µF low-ESR ceramic capacitor to PH to generate gate drive voltage for high-side FET. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 110-mΩ MOSFET | Eliminates external high-side switch, reducing BOM count and PCB footprint while maintaining >95% efficiency at 12-V input/5-V output. |
| Internal type-3 compensation | Removes need for external RC network, simplifying design validation and ensuring stability across 10–100 µH inductors and 22–220 µF output capacitors. |
| Input voltage feed-forward | Provides 25× feed-forward gain to stabilize modulator gain vs. VIN, enabling fast line-transient response (<50 µs recovery for 2-V step). |
| Hiccup-mode overcurrent protection | Enters 16-ms shutdown/restart cycle upon sustained overload, preventing thermal runaway while allowing automatic recovery after fault clears. |
| Thermal shutdown with hysteresis | Shuts down at 135°C junction temperature and re-enables only after cooling to 121°C, avoiding oscillatory behavior near thermal limit. |
Applications
| Industrial Power Supply | Battery Charger Interface |
|---|---|
Use Scenario: Regulating 24-V bus to 5-V/3-A for PLC I/O modules operating in –40°C to 85°C enclosures. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 5-V rail with internal compensation and thermal protection. Use Value: Eliminates need for external compensation components and reduces thermal margining effort via validated SOIC-8 PowerPAD™ thermal model (θJA = 26°C/W on 4-layer board). | Use Scenario: Charging circuit for 3S Li-ion battery pack where input is variable 9–18 V from solar panel or AC adapter. IC Role / Device Role / Timing Role: Adjustable-output buck controller (set to 12.6 V) with precise 1.221-V reference and UVLO hysteresis for reliable cold-start. Use Value: ±1.5% reference accuracy and 5.3-V UVLO ensure consistent charge voltage setpoint and prevent premature enable during low-light solar conditions. |
| LED Driver Power Stage | Automotive Infotainment Rail |
Use Scenario: Driving high-brightness LED arrays in vehicle interior lighting, powered from 12-V battery with load dump tolerance. IC Role / Device Role / Timing Role: Constant-voltage buck stage supplying 5-V logic rail to LED driver IC, handling 36-V transients via 40-V absolute max VIN rating. Use Value: 40-V absolute maximum VIN rating and internal OVP protect downstream circuitry during ISO 7637-2 pulse 5a load-dump events. | Use Scenario: Powering audio DSP and display controller in head unit with strict 125°C junction limit and EMI constraints. IC Role / Device Role / Timing Role: Fixed 500-kHz buck converter minimizing conducted EMI through controlled slew rate and optimized layout guidance. Use Value: 500-kHz switching frequency allows use of small 15-µH shielded inductors and reduces filter size by 40% vs. 250-kHz alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678SD-5.0/NOPB | 5-A rated, 260-mΩ MOSFET, 260-kHz switching, no feed-forward, external compensation required. | Higher current but lower efficiency at light loads; lacks input feed-forward for line transients. | Choose when >3-A peak current needed and layout space allows larger inductor; avoid for fast-line-transient-sensitive designs. |
| TPS5450DDAR | 5-A rated, same SOIC-8 PowerPAD™ package, identical 500-kHz frequency and feed-forward architecture, but wider 4.5–36-V input range. | Direct upgrade path for higher current; shares pinout, layout, and compensation strategy with TPS5430MDDAREPG4. | Select when future-proofing for 5-A capability or tighter 4.5-V UVLO is required; compatible PCB reuse possible. |
Compared with LM2678SD-5.0/NOPB, TPS5430MDDAREPG4 offers superior line transient response and simpler design due to internal compensation and feed-forward; versus TPS5450DDAR, it trades 2-A current headroom for tighter thermal management in the same footprint and lower quiescent current at light loads.
Availability
TPS5430MDDAREPG4 is available at Aetrix Electronics and suitable for industrial power supplies, battery charger interfaces, and LED driver power stages requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for TPS5430MDDAREPG4 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with broad industrial and automotive reach.
The TPS5430MDDAREPG4 belongs to TI's SWIFT™ family of integrated DC/DC converters, designed specifically for high-current, wide-input industrial and defense-grade power conversion where reliability, thermal robustness, and minimal external component count are critical.
FAQ
What is the absolute maximum input voltage rating for the TPS5430MDDAREPG4?
The TPS5430MDDAREPG4 has an absolute maximum VIN rating of 40 V, as specified in the Absolute Maximum Ratings table. Operation above 36 V - its recommended maximum - risks permanent damage even if duration is brief. This 40-V limit accommodates transient spikes such as automotive load dump, but sustained operation must remain within 5.5–36 V per recommended conditions. Always verify input filtering and clamping in systems subject to ISO 7637-2 pulses.
Does the TPS5430MDDAREPG4 require external compensation components?
No, the TPS5430MDDAREPG4 features fully internal type-3 compensation, eliminating the need for external resistors or capacitors in the feedback loop. This is confirmed in the datasheet's "Internal Compensation" section and functional block diagram. Designers can directly connect the VSENSE pin to an output voltage divider; the internal network ensures stability across standard 10–100 µH inductors and 22–220 µF output capacitors without tuning.
What is the thermal resistance (θJA) of the TPS5430MDDAREPG4 in its SOIC-8 PowerPAD™ package?
The TPS5430MDDAREPG4 exhibits θJA = 33°C/W on a 2-layer PCB and 26°C/W on a 4-layer PCB - both measured with six thermal vias under the exposed PowerPAD™ and 2-oz copper planes. These values are documented in the "Dissipation Ratings" section and define the maximum power dissipation before reaching the 125°C junction limit. Layout adherence to TI's recommended land pattern (Figure 10) is mandatory to achieve these ratings.
Can the TPS5430MDDAREPG4 operate with an input voltage below 5.5 V?
No - the TPS5430MDDAREPG4 incorporates an undervoltage lockout (UVLO) circuit that prevents startup until VIN reaches 5.3 V (typical), with 330-mV hysteresis. Below this threshold, the device remains disabled and draws only 18 µA in shutdown. Attempting to operate below 5.5 V violates recommended conditions and results in no regulation; for sub-5.5-V inputs, consider the TPS54202 or similar low-VIN buck regulators.
What is the purpose of the BOOT pin on the TPS5430MDDAREPG4, and what capacitor value is required?
The BOOT pin supplies gate drive voltage to the high-side N-channel MOSFET via a bootstrap capacitor connected between BOOT and PH. A 0.01-µF X5R or X7R ceramic capacitor is required - low ESR and stable over temperature - as specified in the "Boost Capacitor (BOOT)" section. Incorrect placement (e.g., long traces) or wrong dielectric causes gate drive failure, leading to excessive rDS(on), overheating, or no output. This capacitor is mandatory for operation and must be placed adjacent to the IC.
TPS5430MDDAREPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 5.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1.221V
- Voltage - Output (Max):
- 32.04V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS5430MDDAREPG4 FAQ
1.How can I place an order for TPS5430MDDAREPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5430MDDAREPG4 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 TPS5430MDDAREPG4 reliable?
The price and inventory of TPS5430MDDAREPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5430MDDAREPG4 is usually 5 days.
3.What payment methods are accepted for TPS5430MDDAREPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5430MDDAREPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5430MDDAREPG4?
TPS5430MDDAREPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5430MDDAREPG4 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 TPS5430MDDAREPG4?
For technical support, including TPS5430MDDAREPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5430MDDAREPG4 requirements.
6.How does Aetrix verify that TPS5430MDDAREPG4 is sourced from the original manufacturer or authorized distributors?
All TPS5430MDDAREPG4 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 TPS5430MDDAREPG4 meets industry standards.
7.What is the process for return or replacement of TPS5430MDDAREPG4?
All TPS5430MDDAREPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS5430MDDAREPG4, 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 TPS5430MDDAREPG4 part is unused and in its original packaging.
Return procedure for TPS5430MDDAREPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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