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Texas Instruments TPS54327DRCT
- Part No.:
- TPS54327DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54327DRCT.pdf
- Description:
- IC REG BUCK ADJ 3A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,404
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Product details
Overview
TPS54327DRCT 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, D-CAP2™ adaptive on-time control, 700-kHz switching frequency, and 0.76–7-V adjustable output voltage. It delivers fast transient response for digital TV, Blu-ray players, and STB power rails.
For engineers reviewing the TPS54327DRCT datasheet, TPS54327DRCT pinout, TPS54327DRCT application, or TPS54327DRCT equivalent, key selection considerations include its VSON-10 package thermal performance (RθJB = 18.9°C/W), prebiased soft-start capability, cycle-by-cycle overcurrent protection, and compatibility with ultra-low-ESR ceramic output capacitors.
Technical Context
The TPS54327DRCT implements D-CAP2™ mode control-a proprietary adaptive on-time PWM architecture that eliminates external compensation while maintaining stability with ceramic output capacitors. Its internal one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, enabling pseudo-fixed 700-kHz operation across input and load variations.
It integrates dual N-FETs with verified RDS(on) values (100 mΩ HS / 70 mΩ LS), supports forced continuous conduction mode (CCM), and features temperature-compensated valley-current sensing for cycle-by-cycle OCP. UVLO monitors VREG5 (3.45–4.05 V threshold), and thermal shutdown activates at 165°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5 V to 18 V - supports wide-input industrial and consumer power buses including 5 V, 12 V, and 15 V rails. |
| IOUT Max | 3 A continuous - sufficient for core logic, SoC I/O, and FPGA auxiliary rails in digital video equipment. |
| VOUT Range | 0.76 V to 7 V - programmable via resistor divider; 0.765 V reference enables precise 1.05 V, 1.2 V, 1.8 V, 2.5 V, 3.3 V outputs. |
| fSW | 700 kHz nominal - balances EMI, efficiency, and component size; frequency varies <±5% with VIN and IOUT per datasheet curves. |
| RDS(on) HS/LS | 100 mΩ / 70 mΩ - optimized for lower duty cycle applications; reduces conduction loss at typical 1.05–3.3 V outputs. |
| Shutdown IQ | <10 μA - enables ultra-low-power standby in always-on consumer devices like set-top boxes. |
| Soft-Start | Adjustable via external capacitor - prevents inrush current; supports prebiased start-up without sinking output voltage. |
Pinout & Package
TPS54327DRCT uses a 10-pin VSON (DRC) package, 3.00 mm × 3.00 mm, with exposed thermal pad (PGND) on underside for enhanced thermal dissipation (RθJB = 18.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high logic control; 1.6 V threshold ensures robust noise immunity in noisy board environments. |
| 2 (VFB) | Feedback input | Connects to resistor divider; 0.765 V reference enables accurate output regulation with ±1.5 mV tolerance. |
| 3 (VREG5) | 5-V LDO output | Powers external circuitry; supplies up to 10 mA; requires 1-μF ceramic bypass to GND for stability. |
| 4 (SS) | Soft-start control | Sinks 2 μA to charge external capacitor; determines ramp time and prevents overshoot during startup. |
| 5 (GND) | Signal ground | Reference return for VFB and SS; must be star-connected to PGND to avoid noise coupling. |
| 6–7 (SW) | Switch node | Connection point between HS and LS FETs; carries high di/dt; requires tight layout and Kelvin routing. |
| 8 (VBST) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1-μF ceramic capacitor to SW for gate drive integrity. |
| 9–10 (VIN) | Power input | Dual pins reduce IR drop and improve thermal spreading; accepts 4.5–18 V with 20 V absolute max rating. |
| Exposed Pad (PGND) | Power ground | Low-inductance return path for LS FET and thermal conduction; must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control | Zero external compensation required; stable with ceramic capacitors; achieves <10-μs load transient recovery at 3-A step. |
| Integrated FETs | 100-mΩ HS + 70-mΩ LS N-FETs co-optimized for 1.05–3.3 V outputs; eliminates discrete driver and layout complexity. |
| Prebiased Soft-Start | Prevents reverse current flow during startup when output is precharged; avoids system brownout or rail collapse. |
| Cycle-by-Cycle OCP | Valley-current sensing on LS FET; non-latching protection with 7-cycle fault detection and dual-threshold current limiting. |
| VSON-10 Thermal Design | Exposed PGND pad and low RθJB (18.9°C/W) enable 3-A operation at 85°C ambient without heatsink in compact layouts. |
Applications
| Digital TV Power Supply | High Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Supplies 1.2 V core and 3.3 V I/O rails to main SoC and HDMI interface in flat-panel TV designs. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated DC power; operates at 700 kHz to minimize filter size near sensitive video circuitry. Use Value: D-CAP2™ fast transient response maintains <±15 mV output deviation during dynamic video processing loads. | Use Scenario: Powers laser diode driver, servo controller, and MPEG decoder in Blu-ray disc players. IC Role / Device Role / Timing Role: Synchronous step-down converter generating 1.05 V, 1.8 V, and 2.5 V rails from 12 V input. Use Value: Prebiased soft-start prevents voltage droop on shared 3.3 V bus when optical pickup subsystem powers up. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Provides clean 1.1 V CPU core and 1.8 V memory rails in DOCSIS 3.1 cable modems and gateways. IC Role / Device Role / Timing Role: High-efficiency buck regulator operating in forced CCM to suppress audible switching noise in quiet home environments. Use Value: <10 μA shutdown current extends battery backup runtime during AC power loss events. | Use Scenario: Delivers 1.05 V, 1.2 V, and 3.3 V outputs for QAM demodulator, conditional access module, and front-panel display. IC Role / Device Role / Timing Role: Main DC/DC converter supporting rapid channel-change power sequencing requirements. Use Value: Adjustable soft-start time (via SS capacitor) synchronizes rail ramp-up to firmware boot sequence timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54328DRCT | Same pinout and D-CAP2™ control; higher 4-A rating; 85 mΩ/55 mΩ FETs; 100-μA higher quiescent current. | Supports higher peak loads in STB tuner modules; less suitable for ultra-low-IQ standby modes. | Select when >3 A peak current or lower RDS(on) is required; verify thermal margin with same PCB layout. |
| MP2332HG-LL-Z | 3-A, 4.5–18 V, 700-kHz; current-mode control; 90 mΩ/65 mΩ FETs; no VREG5 output or prebiased soft-start. | Lacks integrated 5-V LDO and prebias capability; requires external bias for gate drivers and feedback network. | Choose for cost-sensitive designs where VREG5 and prebias are unused; validate loop stability with ceramic output caps. |
Compared with TPS54327DRCT, TPS54328DRCT offers higher current headroom but increased IQ, while MP2332HG-LL-Z reduces BOM count by eliminating VREG5 but sacrifices startup flexibility and integrated biasing.
Availability
TPS54327DRCT is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player SoC rails, and STB auxiliary power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54327DRCT 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 specializing in analog, embedded processing, and power management ICs, with leadership in high-reliability power conversion solutions.
The TPS54327DRCT belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for space-constrained, high-transient consumer electronics requiring minimal external components and ceramic-capacitor compatibility.
FAQ
What is the maximum output current capability of the TPS54327DRCT?
The TPS54327DRCT is rated for 3-A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). Its current limit threshold is specified from 3.5 A to 5.7 A across temperature, with cycle-by-cycle protection ensuring safe operation into short-circuit or overload conditions. Derating is required above 85°C ambient.
Does the TPS54327DRCT support prebiased soft-start?
Yes, the TPS54327DRCT includes proprietary prebiased soft-start circuitry. When the output voltage is already present at startup, the device gradually enables synchronous rectification using narrow low-side gate pulses, preventing reverse current flow and output voltage collapse. This behavior is confirmed in Section 7.3.3 of the SLVSAG1C datasheet.
What package type and thermal characteristics apply to the TPS54327DRCT?
The TPS54327DRCT uses the 10-pin VSON (DRC) package, 3.00 mm × 3.00 mm, with an exposed thermal pad (PGND). Its junction-to-board thermal resistance (RθJB) is 18.9°C/W, significantly lower than the 8-pin HSOP variant (31.8°C/W), enabling higher power density in compact layouts without added heatsinking.
Can the TPS54327DRCT operate with only ceramic output capacitors?
Yes, the TPS54327DRCT is explicitly designed for ultra-low-ESR ceramic output capacitors. Its D-CAP2™ control architecture includes internal ripple injection to maintain loop stability without relying on capacitor ESR, allowing use of 22–68 μF X5R/X7R ceramics as specified in Table 2 of the datasheet.
What is the function of the VREG5 pin on the TPS54327DRCT?
The VREG5 pin on the TPS54327DRCT provides a regulated 5.2–5.7 V output capable of supplying up to 10 mA. It powers the internal gate driver and can optionally supply external circuitry such as level shifters or bias networks. It is active only when EN is high and requires a 1-μF ceramic capacitor to GND for stability, as detailed in Section 5 and Figure 7 of SLVSAG1C.
TPS54327DRCT 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)
TPS54327DRCT FAQ
1.How can I place an order for TPS54327DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54327DRCT 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 TPS54327DRCT reliable?
The price and inventory of TPS54327DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54327DRCT is usually 5 days.
3.What payment methods are accepted for TPS54327DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54327DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54327DRCT?
TPS54327DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54327DRCT 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 TPS54327DRCT?
For technical support, including TPS54327DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54327DRCT requirements.
6.How does Aetrix verify that TPS54327DRCT is sourced from the original manufacturer or authorized distributors?
All TPS54327DRCT 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 TPS54327DRCT meets industry standards.
7.What is the process for return or replacement of TPS54327DRCT?
All TPS54327DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54327DRCT, 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 TPS54327DRCT part is unused and in its original packaging.
Return procedure for TPS54327DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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