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Texas Instruments TPS54627DDA
- Part No.:
- TPS54627DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54627DDA.pdf
- Description:
- IC REG BUCK ADJ 6A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,159
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Product details
Overview
TPS54627DDA from Texas Instruments is a 6-A synchronous step-down DC/DC converter with integrated high-side and low-side N-channel MOSFETs, operating in D-CAP2™ adaptive on-time mode. It delivers regulated output voltages from 0.76 V to 5.5 V across a 4.5–18-V input range, features 36 mΩ/28 mΩ RDS(on), 650-kHz switching frequency, and supports ceramic output capacitors - used in digital TV power supplies and networking home terminals.
For engineers reviewing the TPS54627DDA datasheet, TPS54627DDA pinout, TPS54627DDA application, or TPS54627DDA equivalent, key selection considerations include its D-CAP2 control architecture for zero-external-compensation transient response, prebiased soft-start capability, cycle-by-cycle overcurrent protection, thermal shutdown at 165°C, and SO PowerPAD (8-pin) package thermal performance (RθJA = 43.5°C/W).
Technical Context
The TPS54627DDA implements adaptive on-time D-CAP2 control using an internal ramp to emulate output ripple, enabling stable operation with ultra-low-ESR ceramic capacitors without external compensation. Its feedback loop monitors VFB referenced to 765 mV and uses valley-current sensing during low-side conduction for cycle-by-cycle OCP.
Functional modes include PWM operation with pseudo-fixed 650-kHz frequency set by VIN and VO, hiccup-mode recovery after undervoltage (65% of target) or overvoltage (125%) events, and UVLO activation at VREG5 < 3.45 V. Output discharge is enabled via internal low-side FET control when EN is low, avoiding negative voltage at VOUT.
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 18 V rails. |
| Output Current | 6 A continuous - sufficient for powering multi-core SoCs, FPGAs, and ASICs in embedded systems. |
| Output Voltage Range | 0.76 V to 5.5 V - programmable via resistor divider; enables core voltage regulation for processors and memory I/O. |
| Switching Frequency | 650 kHz - fixed nominal frequency enables predictable EMI filtering and compact magnetics design. |
| RDS(on) (HS/LS) | 36 mΩ / 28 mΩ - low conduction losses improve efficiency especially at high duty cycles and light loads. |
| Control Mode | D-CAP2™ - eliminates need for external compensation components while maintaining fast load-step response. |
| Soft-Start | Adjustable via external capacitor - prevents inrush current; supports prebiased startup without sinking output. |
| Thermal Shutdown | 165°C threshold with 35°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
The TPS54627DDA is housed in an 8-pin SO PowerPAD package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to GND for enhanced thermal dissipation (RθJC(bot) = 5.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic control; internal 200–800 kΩ pull-down allows direct connection to microcontroller GPIO or system power rail. |
| VFB (Pin 2) | Feedback input | Monitors output via resistor divider; 765 mV reference enables precise regulation with ±1% typical accuracy over temperature. |
| VREG5 (Pin 3) | Internal LDO output | 5.5-V bias supply for gate drivers; requires 1 µF ceramic capacitor; inactive when EN = low. |
| SS (Pin 4) | Soft-start control | 6 µA current source charges external capacitor; start-up time = 1.1 × CSS(nF) / 6 µA - configurable for controlled ramp. |
| GND (Pin 5) | Power ground | Common return for switching path; must be connected to thermal pad and isolated from analog ground traces. |
| SW (Pin 6) | Switch node | Connection point between HS and LS FETs; drives external inductor; requires tight layout to minimize ringing and EMI. |
| VBST (Pin 7) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1 µF ceramic capacitor to SW for high-side gate drive. |
| VIN (Pin 8) | Main input supply | Accepts 4.5–18 V; must be decoupled with ≥10 µF ceramic + optional 0.1 µF high-frequency bypass near pin. |
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 during startup when output is precharged - critical for hot-swap and multi-rail sequencing applications. |
| Cycle-by-cycle overcurrent limit | Detects valley current during low-side conduction; triggers hiccup mode after 7 consecutive faults - avoids thermal runaway under short-circuit conditions. |
| Integrated 5.5-V LDO (VREG5) | Supplies gate drive for internal FETs; eliminates need for external bias supply - simplifies system power architecture. |
| Output discharge function | Activates internal discharge path when EN = low - ensures rapid VOUT decay for safety-critical or power-state transition requirements. |
| UVLO and OVP/UVP protection | Shuts down if VREG5 drops below 3.45 V or VFB exceeds 125%/falls below 65% of target - prevents malfunction during brownout or fault conditions. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers main SoC and DDR memory in 4K UHD television sets requiring clean, tightly regulated 1.05 V and 1.8 V rails. IC Role / Device Role / Timing Role: Primary buck regulator delivering up to 6 A at 1.05 V with <50 mV output ripple under dynamic load steps. Use Value: D-CAP2™ control ensures sub-10 µs transient response to video frame buffer bursts, eliminating need for large bulk capacitance. | Use Scenario: Supplies processor, PHY, and interface ICs in residential gateways and Wi-Fi 6 routers operating from 12-V wall adapters. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping 12 V down to 3.3 V and 5 V for peripheral subsystems. Use Value: 650-kHz switching and low RDS(on) enable >92% peak efficiency at 4 A, reducing thermal load in sealed enclosures. |
| High-Definition Blu-ray Disc™ Player | Digital Set-Top Box (STB) |
Use Scenario: Regulates core voltage for BD-ROM controller and video decoder ASICs subject to bursty disc-read workloads. IC Role / Device Role / Timing Role: Synchronous buck converter providing 1.2 V @ 5 A with adjustable soft-start to meet HDMI handshaking timing windows. Use Value: Prebiased soft-start prevents output collapse during warm reboot, ensuring uninterrupted HDCP authentication sequence. | Use Scenario: Powers triple-tuner demodulator, MPEG decoder, and Ethernet MAC in cable/satellite STBs with strict standby current limits. IC Role / Device Role / Timing Role: Main PMIC buck stage delivering 1.1 V @ 6 A to SoC; supports deep-sleep mode with <10 µA shutdown current. Use Value: Ultra-low shutdown current extends battery backup runtime in smart-card readers and conditional-access modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYR | Same D-CAP2 architecture but dual-output (2×3 A); 16-pin QFN; higher pin count and different thermal pad layout. | Suitable for split-rail designs (e.g., 1.0 V + 3.3 V) where space permits two independent outputs. | Select when needing dual independent outputs with shared enable/control; not pin-compatible with TPS54627DDA. |
| MP2315GJ-Z | Monolithic 6-A buck with 4.5–28-V input; fixed 650-kHz frequency; no VREG5 LDO - requires external bias. | Better suited for higher-input-voltage industrial applications (>18 V), but lacks integrated gate-drive bias and prebias startup. | Choose for cost-sensitive 24-V systems where external 5-V bias is available; requires redesign of bootstrap and soft-start circuitry. |
Compared with TPS54627DDA, TPS54620RGYR offers dual-output flexibility at the expense of board area and layout complexity, while MP2315GJ-Z extends input voltage range but removes integrated bias generation and prebiased soft-start - making TPS54627DDA optimal for compact, low-noise 12-V consumer electronics with strict sequencing requirements.
Availability
TPS54627DDA 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 lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54627DDA 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, embedded processing, and silicon technologies for industrial, automotive, and consumer markets.
The TPS54627DDA belongs to TI's D-CAP2™ synchronous buck converter product line, engineered specifically for high-transient-response, low-component-count power delivery in space-constrained consumer electronics with demanding efficiency and reliability requirements.
FAQ
What is the recommended input capacitor configuration for TPS54627DDA?
TI recommends a minimum 10-µF ceramic input capacitor placed as close as possible to the VIN and GND pins of the TPS54627DDA, plus an optional 0.1-µF high-frequency ceramic capacitor (C3) directly across VIN and GND. The TPS54627DDA datasheet specifies that the input capacitor voltage rating must exceed the maximum applied VIN, and proper placement minimizes input ripple and improves EMI performance. These values ensure stable operation under full 6-A load transients.
Does TPS54627DDA support prebiased soft-start, and how does it work?
Yes, the TPS54627DDA supports prebiased soft-start. When the output is precharged before enable, the device avoids sinking current by initially pulsing only the low-side FET with narrow on-times, then incrementally increasing conduction until reaching normal regulation. This behavior is implemented in hardware and requires no external circuitry. The TPS54627DDA maintains this functionality across its full –40°C to 85°C operating temperature range, ensuring reliable startup in hot-plug and multi-rail systems.
What is the purpose of the VREG5 pin on TPS54627DDA, and what external component is required?
The VREG5 pin on the TPS54627DDA provides a regulated 5.5-V output used internally to power the high-side gate driver circuitry. A 1-µF ceramic capacitor must be connected between VREG5 and GND for stability and noise suppression. This capacitor is mandatory for proper operation; omitting it causes gate drive failure and potential FET shoot-through. The TPS54627DDA disables VREG5 output when EN is low, reducing system standby power consumption.
How does the cycle-by-cycle overcurrent protection function in TPS54627DDA?
The TPS54627DDA implements cycle-by-cycle overcurrent protection by monitoring the low-side FET's VSW-GND voltage during its conduction phase - a value proportional to inductor current. If the sensed voltage exceeds the threshold corresponding to ~7.3 A (typical), the device holds the low-side FET on until current falls below threshold, then enters hiccup mode after seven consecutive violations. This protection is temperature-compensated and non-latching, allowing automatic recovery once the fault clears - a key safety feature in the TPS54627DDA design.
Can TPS54627DDA operate with ceramic output capacitors, and why is this significant?
Yes, the TPS54627DDA is explicitly designed to operate with ceramic output capacitors due to its D-CAP2™ control architecture, which includes internal ripple emulation to maintain loop stability without relying on ESR-induced voltage ripple. This eliminates the need for higher-ESR tantalum or polymer capacitors, reducing solution size, cost, and failure risk. Using ceramic capacitors with the TPS54627DDA achieves lower output ripple (<50 mV), faster transient response, and longer lifetime - all confirmed in TI's TPS54627DDA application curves and test data.
TPS54627DDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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):
- 0.765V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS54627DDA FAQ
1.How can I place an order for TPS54627DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54627DDA 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 TPS54627DDA reliable?
The price and inventory of TPS54627DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54627DDA is usually 5 days.
3.What payment methods are accepted for TPS54627DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54627DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54627DDA?
TPS54627DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54627DDA 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 TPS54627DDA?
For technical support, including TPS54627DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54627DDA requirements.
6.How does Aetrix verify that TPS54627DDA is sourced from the original manufacturer or authorized distributors?
All TPS54627DDA 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 TPS54627DDA meets industry standards.
7.What is the process for return or replacement of TPS54627DDA?
All TPS54627DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54627DDA, 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 TPS54627DDA part is unused and in its original packaging.
Return procedure for TPS54627DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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