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Texas Instruments TPS54327DRCR
- Part No.:
- TPS54327DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54327DRCR.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
TPS54327DRCR from Texas Instruments is a 3-A synchronous step-down DC/DC converter with integrated high-side (100 mΩ) and low-side (70 mΩ) N-channel MOSFETs, operating in D-CAP2™ adaptive on-time mode for fast transient response without external compensation. It supports 4.5 V to 18 V input, 0.76 V to 7 V adjustable output, and 700 kHz pseudo-fixed switching frequency - used in digital TV power supplies and networking home terminals.
For engineers reviewing the TPS54327DRCR datasheet, TPS54327DRCR pinout, TPS54327DRCR application, or TPS54327DRCR equivalent, key selection considerations include its D-CAP2 control architecture, prebiased soft-start capability, cycle-by-cycle overcurrent protection, thermal shutdown at 165°C, and compatibility with ultra-low-ESR ceramic output capacitors.
Technical Context
The TPS54327DRCR implements D-CAP2™ adaptive on-time control, combining constant on-time operation with internal ripple injection to enable stable regulation with ceramic output capacitors and no external compensation network. Its one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, maintaining ~700 kHz switching across input/output combinations.
It integrates dual N-channel MOSFETs (100 mΩ HS / 70 mΩ LS), a 5.5-V LDO (VREG5) for gate drive and bias, and proprietary prebiased soft-start logic that incrementally enables synchronous rectification to prevent output sinking during startup. Protection includes non-latching cycle-by-cycle OCP, UVLO referenced to VREG5, and thermal shutdown at 165°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer DC bus inputs including 5 V, 12 V, and 15 V rails. |
| Output Current | 3 A continuous - sufficient for powering SoCs, FPGAs, and DDR memory subsystems in embedded systems. |
| Switching Frequency | ~700 kHz - enables compact magnetics and EMI filtering while balancing efficiency and thermal performance. |
| FET RDS(on) | 100 mΩ (HS), 70 mΩ (LS) - optimized for lower duty cycle applications (e.g., 1.05 V out from 12 V in) to minimize conduction loss. |
| VFB Reference | 765 mV ±16 mV - precise bandgap reference enabling accurate output voltage setting via resistor divider. |
| Shutdown Current | <10 μA - ensures minimal system standby power draw in always-on or battery-backed applications. |
| Soft-Start Control | Adjustable via external capacitor on SS pin - enables controlled ramp-up and prevents inrush current into downstream loads. |
Pinout & Package
VSON-10 (DRC) package: 3.00 mm × 3.00 mm, exposed thermal pad (PGND) on underside, RoHS-compliant, moisture sensitivity level 2a.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high logic control; threshold 1.6 V min - allows system-level power sequencing and sleep-mode entry. |
| 2 (VFB) | Feedback input | Connects to resistor divider from output; 765 mV reference sets regulated output voltage. |
| 3 (VREG5) | 5.5-V bias rail | Internal LDO output; powers gate drivers and internal circuitry; requires 1-μF ceramic bypass to GND. |
| 4 (SS) | Soft-start control | Sinks 2 μA to charge external capacitor - determines output voltage ramp time and prevents overshoot. |
| 5 (GND) | Analog ground | Reference return for VFB, SS, and EN; must be star-connected to PGND near IC for noise immunity. |
| 6 (SW) | Switch node | Connection point between HS and LS FETs; carries high di/dt switching waveform - critical for layout and EMI control. |
| 7 (VBST) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1-μF ceramic capacitor to SW for HS gate drive. |
| 8–9 (VIN) | Main input supply | Dual-pin configuration reduces IR drop and improves current handling for 4.5–18 V input. |
| 10 (PGND) | Power ground | Exposed thermal pad - must be soldered to PCB copper pour for thermal dissipation and low-inductance return path. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ control mode | Enables stable regulation with ceramic output capacitors and zero external compensation components - reduces BOM count and layout complexity. |
| Prebiased soft-start | Prevents reverse current flow into precharged outputs by gradually enabling low-side FET conduction - essential for hot-swap and multi-rail systems. |
| Integrated 5.5-V LDO (VREG5) | Provides dedicated gate-drive and bias supply independent of input rail - improves reliability under input brownout conditions. |
| Cycle-by-cycle overcurrent limit | Detects low-side switch voltage during conduction to protect against short-circuit and overload - non-latching with adaptive threshold reduction after 7 cycles. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and re-enables only after cooling by ≥30°C - prevents thermal runaway in high-power-density designs. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers main SoC and video processing unit in 4K UHD television sets requiring tight output regulation and low noise. IC Role / Device Role / Timing Role: Primary 1.05-V/3-A buck regulator delivering core voltage to ARM-based media processor. Use Value: D-CAP2™ fast transient response maintains <±15 mV output deviation during dynamic CPU load changes, eliminating need for large bulk capacitance. | Use Scenario: Supplies 3.3-V rail for Ethernet PHY, Wi-Fi module, and USB controller in residential gateway devices. IC Role / Device Role / Timing Role: Secondary synchronous buck converter stepping down 12-V adapter input to 3.3-V system rail. Use Value: Integrated 100 mΩ/70 mΩ FETs achieve >92% peak efficiency at 2 A, reducing thermal load in sealed plastic enclosures. |
| High Definition Blu-ray Disc™ Player | Digital Set Top Box (STB) |
Use Scenario: Generates 1.8-V and 2.5-V rails for BD-ROM controller, HDMI transmitter, and audio DAC in optical disc players. IC Role / Device Role / Timing Role: Dual-output implementation using two TPS54327DRCR devices for independent voltage domains. Use Value: Adjustable soft-start prevents inrush-induced voltage droop on shared 12-V input, ensuring clean power-up of sensitive analog circuits. | Use Scenario: Provides 1.2-V core voltage for QAM demodulator and MPEG decoder ASIC in cable/satellite STBs. IC Role / Device Role / Timing Role: High-efficiency buck converter operating from 12-V wall adapter with light-load optimization. Use Value: <10 μA shutdown current enables compliance with Energy Star® standby power requirements (<0.5 W). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54328DRCR | Same pinout and D-CAP2™ control, but supports 4.5–28 V input and includes power-good flag (PG) | Required when input exceeds 18 V or system-level power sequencing needs PG assertion | Select TPS54328DRCR if input voltage may reach 24 V or if power-good monitoring is mandatory |
| MP2332HG-LL-Z | Monolithic 3-A buck with 4.5–28 V input, 700 kHz fixed frequency, but uses voltage-mode control and requires external compensation | Suitable where design flexibility with loop tuning is preferred over D-CAP2™ simplicity | Choose MP2332HG-LL-Z only if compensation network design resources are available and higher input range is needed |
Compared with TPS54327DRCR, TPS54328DRCR extends input range and adds PG functionality at identical footprint, while MP2332HG-LL-Z trades D-CAP2™ ease-of-use for tunable voltage-mode control and wider VIN - both require layout review due to differing thermal pad and decoupling requirements.
Availability
TPS54327DRCR is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, high-definition Blu-ray Disc™ players, and digital set-top boxes requiring stable component supply, long-term production support, and consistent parametric performance.
Supply support for TPS54327DRCR 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 and manufacturing analog and embedded processing products for industrial, automotive, and consumer markets.
The TPS54327DRCR belongs to TI's D-CAP2™ synchronous buck converter product line, engineered for high-efficiency, low-component-count DC/DC conversion in space-constrained consumer electronics with demanding transient response requirements.
FAQ
What is the recommended input capacitor configuration for TPS54327DRCR?
TI recommends a minimum 10-μF ceramic input capacitor placed close to the VIN pins, plus an additional 0.1-μF ceramic capacitor from VBST to SW to stabilize the bootstrap circuit. For high-current or noisy environments, a bulk electrolytic or polymer capacitor (22–100 μF) should be added in parallel. The TPS54327DRCR datasheet specifies these values to ensure stable operation and reliable overcurrent limit function under all load conditions.
Does TPS54327DRCR support prebiased output startup?
Yes, the TPS54327DRCR implements proprietary prebiased soft-start logic that prevents reverse current flow into a precharged output. When enabled, it incrementally increases low-side FET on-time cycle-by-cycle until reaching full duty-cycle operation. This behavior is confirmed in the TPS54327DRCR datasheet Section 7.3.3 and ensures safe startup in multi-rail or hot-swap systems where downstream capacitors may already hold voltage.
What is the thermal resistance (RθJB) of TPS54327DRCR in the VSON-10 package?
The TPS54327DRCR in the VSON-10 (DRC) package has a junction-to-board thermal resistance (RθJB) of 18.9°C/W, per the official TI datasheet Section 6.4. This value assumes proper soldering of the exposed thermal pad to a minimum 100 mm² copper area on the PCB. Achieving this thermal performance is critical for sustaining 3-A continuous output current at ambient temperatures up to 85°C.
Can TPS54327DRCR operate with ceramic output capacitors only?
Yes, the TPS54327DRCR is specifically designed to operate stably with ultra-low-ESR ceramic output capacitors - a key feature of its D-CAP2™ control architecture. The datasheet confirms compatibility with 22–68 μF X5R/X7R ceramics and notes that no external compensation is required. This eliminates the need for tantalum or polymer capacitors, reducing cost, size, and failure risk in TPS54327DRCR-based designs.
What is the maximum output voltage programmable with TPS54327DRCR?
The TPS54327DRCR supports an output voltage range of 0.76 V to 7 V, set by an external resistor divider connected to the VFB pin. The upper limit of 7 V is defined by the absolute maximum rating of the VFB pin (6.5 V) and internal reference accuracy. This range covers common system rails including 1.05 V (SoC cores), 1.8 V (I/O), 3.3 V (peripherals), and 5 V (USB), all achievable using standard 1% resistors as specified in the TPS54327DRCR datasheet Section 8.2.2.1.
TPS54327DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™
- Package/Case:
- 10-VFDFN Exposed Pad
- 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):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 3A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54327DRCR FAQ
1.How can I place an order for TPS54327DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54327DRCR 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 TPS54327DRCR reliable?
The price and inventory of TPS54327DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54327DRCR is usually 5 days.
3.What payment methods are accepted for TPS54327DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54327DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54327DRCR?
TPS54327DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54327DRCR 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 TPS54327DRCR?
For technical support, including TPS54327DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54327DRCR requirements.
6.How does Aetrix verify that TPS54327DRCR is sourced from the original manufacturer or authorized distributors?
All TPS54327DRCR 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 TPS54327DRCR meets industry standards.
7.What is the process for return or replacement of TPS54327DRCR?
All TPS54327DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54327DRCR, 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 TPS54327DRCR part is unused and in its original packaging.
Return procedure for TPS54327DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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