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Texas Instruments TPS5432DDAR
- Part No.:
- TPS5432DDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS5432DDAR.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:6,186
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Product details
Overview
TPS5432DDAR from Texas Instruments is a 2.95–6 V input, 3 A synchronous step-down DC/DC converter with integrated 70 mΩ high-side and low-side MOSFETs, fixed 700 kHz switching frequency, 0.808 V internal reference, and current-mode control-designed for point-of-load regulation in SoC/CPU/DSP power rails.
For engineers reviewing the TPS5432DDAR datasheet, TPS5432DDAR pinout, TPS5432DDAR application, or TPS5432DDAR equivalent, this page delivers verified electrical parameters, SOIC-8 PowerPAD™ package details, thermal performance data, slow-start and overvoltage protection behavior, and validated alternative parts for industrial and embedded power design.
Technical Context
The TPS5432DDAR implements peak current-mode control with slope compensation to prevent subharmonic oscillation across duty cycles up to 100%. Its error amplifier (245 µA/V transconductance) compares VSENSE against either the 0.808 V internal reference or SS pin voltage during startup.
Frequency foldback reduces switching frequency to 50% and 25% of nominal as VSENSE drops below 0.4 V and 0.2 V respectively-enabling safe current limiting during overload and startup. Overvoltage transient protection activates at 107% of nominal output, disabling the high-side FET until voltage falls to 105%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.95 V to 6 V - supports single-cell Li-ion, USB-powered, and 3.3/5 V rail inputs without external LDO pre-regulation. |
| Output Current | 3 A continuous - enables direct powering of mid-power SoCs, FPGAs, and DSPs without parallel converters. |
| Switching Frequency | 700 kHz (typical) - balances efficiency and compact filter size; allows ≤3.3 µH inductors and ceramic output capacitors. |
| Quiescent Current | 360 µA (no load, no switching) - minimizes standby power loss in always-on systems. |
| Voltage Reference | 0.808 V ±2.0% at 25°C, ±3.0% over –40°C to +125°C - ensures tight output regulation across temperature for 1.2 V, 1.8 V, and 3.3 V rails. |
| Thermal Shutdown | 170°C trip, 155°C recovery (15°C hysteresis) - protects against sustained overload or poor PCB thermal design. |
| Enable Threshold | 1.23 V rising, 1.19 V falling - provides clean, hysteresis-enabled on/off control using simple resistor dividers from VIN. |
Pinout & Package
TPS5432DDAR uses an 8-pin SOIC package with exposed thermal pad (PowerPAD™), designated DDA. The thermal pad must be soldered to a PCB ground plane via multiple vias for optimal thermal performance (θJB = 31.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to 0.1 µF X7R/X5R ceramic capacitor between BOOT and PH; UVLO disables high-side FET if BOOT–PH < 2.1 V. |
| VIN | Main power input | Supplies control circuitry and gate drivers; accepts 2.95–6 V; includes 2.8 V UVLO with 0.2 V hysteresis. |
| PH | Power switch node | Source of high-side FET and drain of low-side FET; connects directly to inductor; requires low-inductance layout. |
| GND | Power and signal ground | Must connect electrically to exposed thermal pad; forms return path for high di/dt currents and error amplifier reference. |
| VSENSE | Feedback input | Inverting input of gm error amplifier; sets output voltage via resistor divider; monitors OVTP at 107% of reference. |
| COMP | Error amplifier output | Drives PWM comparator; connects to RC compensation network; gm = 245 µA/V (normal), 70 µA/V (slow start). |
| EN | Enable control | Internal 1.2 µA pull-up; device enabled when >1.23 V; shutdown draws <5 µA; supports adjustable UVLO with external resistors. |
| SS | Slow-start timing | 2 µA internal charge current; external capacitor sets output ramp time; discharged fully before restart after fault. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFETs | 70 mΩ (HS) / 73 mΩ (LS) typical RDS(on) at 25°C - eliminates external switches and reduces conduction losses at 3 A. |
| Ceramic-capacitor stable | Compensated for low-ESR ceramic output caps - avoids need for electrolytic or tantalum, improving reliability and size. |
| Cycle-by-cycle current limit | Clamps COMP voltage to limit peak inductor current - prevents saturation and enables robust short-circuit response. |
| Reverse overcurrent protection | Detects >1.8 A reverse current through low-side FET - prevents damage during pre-biased start-up or power cycling. |
| Overvoltage transient protection | Disables high-side FET when VSENSE > 107% VREF - limits output overshoot during unload or fault recovery. |
Applications
| Consumer Set-Top Box Power | SoC Point-of-Load Regulation |
|---|---|
Use Scenario: Powering video processing SoC and memory interfaces in digital TV receivers requiring 1.2 V @ 3 A with <18 mV ripple. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated core voltage; handles 0.75–2.25 A load transients with <6% ΔVOUT. Use Value: Integrated MOSFETs and 700 kHz operation enable compact 2-layer PCB layout with 2.2 µH inductor and 22 µF ceramic output cap. | Use Scenario: Supplying 1.8 V core rail to ARM-based microprocessors in industrial HMIs with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Synchronous step-down converter with thermal shutdown (170°C) and wide input range (3–6 V) for unregulated 5 V bus operation. Use Value: 360 µA quiescent current extends battery backup time; EN pin hysteresis ensures clean power sequencing with system MCU. |
| LCD Display Backlight Driver Bias | CPE Router CPU Core Supply |
Use Scenario: Generating 3.3 V bias for LED driver ICs in 10.1" industrial LCD panels powered from 5 V USB-C source. IC Role / Device Role / Timing Role: Fixed-frequency buck converter with adjustable soft-start (via SS pin) to prevent inrush into large display capacitance. Use Value: Slow-start capacitor sets controlled 5 ms ramp; frequency foldback prevents inductor saturation during cold-start into 1000 µF bulk capacitance. | Use Scenario: Delivering 1.2 V @ 3 A to MIPS-based networking SoC in carrier-grade customer premises equipment operating 24/7. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC/DC stage with PowerPAD™ package and θJB = 31.8°C/W for convection-cooled chassis. Use Value: Exposed thermal pad soldered to 4-layer internal ground plane sustains full 3 A load at 75°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54328DDAR | Same pinout, 2.95–6 V input, but 4 A rated; higher HS/LS RDS(on) (52/62 mΩ); 350 µA IQ; includes power-good flag. | Supports higher peak loads (e.g., burst-mode CPU activity); PG pin enables system monitoring not available on TPS5432DDAR. | Select when >3 A headroom or power-good signaling is required; otherwise identical layout and compensation. |
| MP2332HGRT-Z | Monolithic 3 A buck; 4.5–24 V input; 500 kHz switching; 250 µA IQ; different pinout (8-pin QFN); no SS pin or OVTP. | Suitable for wider-input industrial rails (e.g., 12 V intermediate bus); lacks slow-start adjustability and overvoltage protection. | Choose for higher input voltage systems where TPS5432DDAR's 6 V max is insufficient; requires new PCB layout and compensation. |
Compared with TPS5432DDAR, TPS54328DDAR offers higher current capability and power-good signaling in identical SOIC-8 PowerPAD™ packaging, while MP2332HGRT-Z supports wider input ranges but omits key protections and requires board redesign.
Availability
TPS5432DDAR is available at Aetrix Electronics and suitable for consumer set-top boxes, SoC point-of-load regulation, LCD display bias supplies, and CPE router CPU core supplies requiring stable component supply and long-term industrial availability.
Supply support for TPS5432DDAR 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, designing analog and embedded processing chips for industrial, automotive, and communications markets.
The TPS5432DDAR belongs to TI's SWIFT™ family of integrated DC/DC converters, engineered specifically for high-efficiency, space-constrained point-of-load applications in consumer electronics and embedded systems.
FAQ
What is the maximum continuous output current of the TPS5432DDAR?
The TPS5432DDAR delivers 3 A continuous output current under thermal-limited conditions with proper PCB layout. Its integrated 70 mΩ high-side and 73 mΩ low-side MOSFETs enable this rating at 700 kHz switching with adequate heatsinking via the exposed thermal pad. Derating applies above 75°C ambient unless θJB is improved via multi-via grounding.
Does the TPS5432DDAR support ceramic output capacitors?
Yes, the TPS5432DDAR is explicitly designed for stable operation with low-ESR ceramic output capacitors. Its internal compensation and current-mode architecture eliminate the need for high-ESR electrolytics or tantalums. Typical designs use 22 µF X5R/X7R ceramics with 0.1 µF high-frequency bypass caps near the VSENSE pin.
How does the slow-start function work on the TPS5432DDAR?
The TPS5432DDAR uses an internal 2 µA current source to charge an external capacitor on the SS pin, controlling output voltage ramp time. During faults (UVLO, thermal shutdown, or EN deactivation), the SS pin is actively discharged to 0 V before restart-ensuring repeatable, controlled power-up sequences without output overshoot.
What protection features are built into the TPS5432DDAR?
The TPS5432DDAR includes cycle-by-cycle current limiting, frequency foldback during overloads, thermal shutdown (170°C trip), overvoltage transient protection (107% threshold), reverse overcurrent detection (>1.8 A), and input UVLO (2.8 V with 0.2 V hysteresis). These operate autonomously without external components.
Can the TPS5432DDAR operate at 100% duty cycle?
The TPS5432DDAR can sustain 100% duty cycle only if the BOOT–PH voltage remains above 2.1 V-requiring sufficient boot capacitor recharge time. However, TI advises against no-load 100% operation due to potential BOOT voltage collapse; use EN pin control or light-load pulse-skipping modes instead.
TPS5432DDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.95V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.808V
- Voltage - Output (Max):
- 4.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS5432DDAR FAQ
1.How can I place an order for TPS5432DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS5432DDAR 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 TPS5432DDAR reliable?
The price and inventory of TPS5432DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS5432DDAR is usually 5 days.
3.What payment methods are accepted for TPS5432DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS5432DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS5432DDAR?
TPS5432DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS5432DDAR 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 TPS5432DDAR?
For technical support, including TPS5432DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS5432DDAR requirements.
6.How does Aetrix verify that TPS5432DDAR is sourced from the original manufacturer or authorized distributors?
All TPS5432DDAR 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 TPS5432DDAR meets industry standards.
7.What is the process for return or replacement of TPS5432DDAR?
All TPS5432DDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS5432DDAR, 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 TPS5432DDAR part is unused and in its original packaging.
Return procedure for TPS5432DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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