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Texas Instruments TPS65252RHDR
- Part No.:
- TPS65252RHDR
- Manufacturer:
- Texas Instruments
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
TPS65252RHDR.pdf
- Description:
- IC REG BUCK ADJ 3A/2A DL 28VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,087
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Product details
Overview
TPS65252RHDR from Texas Instruments is a dual-channel synchronous step-down DC/DC power management IC with integrated high-side and low-side MOSFETs, supporting 4.5 V–16 V input, 3.5-A/2.5-A peak output current per channel, adjustable 300 kHz–2.2 MHz switching frequency via ROSC pin, and an integrated 1-A USB switch with overcurrent protection. It powers core logic and I/O rails in set-top boxes and home gateways.
For engineers reviewing the TPS65252RHDR datasheet, TPS65252RHDR pinout, TPS65252RHDR application, or TPS65252RHDR equivalent, key selection considerations include independent enable/soft-start pins for sequencing, adjustable current limit (RLIM1/RLIM2), out-of-phase operation to reduce input ripple, and low-power mode activation via LOW_P pin.
Technical Context
The TPS65252RHDR implements peak current-mode control for both buck regulators, enabling stable loop compensation with simple Type II RC networks on COMP1/COMP2 pins. Each channel features independent feedback (FB1/FB2), soft-start (SS1/SS2), enable (EN1/EN2), and cycle-by-cycle current limiting (RLIM1/RLIM2) with external resistor programming.
It integrates two LDOs (V3V = 3.3 V, V7V = 6.25 V), a 1-A USB switch with programmable current limit (rUSB), thermal shutdown (160 °C trip), and a 256-ms PGOOD assertion timer monitoring both outputs. Buck1 and Buck2 operate 180° out-of-phase to minimize input capacitor RMS current and EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 16 V - supports 5 V, 9 V, and 12 V systems without external pre-regulation |
| Buck1 Output Current | 3.5-A peak / 3-A continuous - enables high-current core rail generation (e.g., 1.2 V @ 3 A) |
| Buck2 Output Current | 2.5-A peak / 2-A continuous - suitable for I/O or memory rails (e.g., 1.8 V or 3.3 V @ 2 A) |
| Switching Frequency | 300 kHz to 2.2 MHz - set by external ROSC resistor; allows trade-off between efficiency, size, and EMI |
| USB Switch Current Limit | 0.42–1.36 A - adjustable via rUSB resistor (76.8 kΩ or 154 kΩ to GND) |
| Power Good Delay | 256 ms - fixed reset timer ensures system stability before host processor release |
| Low-Power Mode | Enabled by HIGH signal on LOW_P pin - reduces quiescent current to 0.5 mA during standby |
Pinout & Package
TPS65252RHDR is housed in a thermally enhanced 28-pin QFN package (RHD), 5 mm × 5 mm, with exposed power pad soldered to PCB ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ROSC | Oscillator frequency setting input | Resistor-to-ground sets switching frequency (300 kHz–2.2 MHz); critical for EMI and inductor sizing |
| FB1, FB2 | Feedback inputs | 0.8 V reference; connect resistor dividers to set output voltage from 0.8 V to VIN − 1 V |
| EN1, EN2 | Enable inputs | Active-high logic; internal 1-MΩ pull-up; add capacitor for delayed start-up sequencing |
| SS1, SS2 | Soft-start inputs | 5 µA internal current source charges external capacitor; sets ramp time (e.g., 4.7 nF = 0.8 ms) |
| RLIM1, RLIM2 | Current limit programming inputs | Resistor-to-ground sets peak inductor current (Buck1: 1.1–5.2 A; Buck2: 0.9–4.5 A) |
| LX1, LX2 | Switching node outputs | Connect to external inductors; require low-ESR ceramic capacitors and careful layout for EMI control |
| BST1, BST2 | Bootstrap supply inputs | Connect 47-nF X7R/X5R ceramic capacitor to respective LX pin for high-side FET gate drive |
| rUSB | USB current limit setting | Resistor-to-ground programs USB switch current limit (0.42–1.36 A); enables compliance with USB 2.0 specs |
| PGOOD | Open-drain power-good output | Asserts high only when both buck outputs are ≥90% of target; deasserts at ≤85%; requires external pull-up |
| LOW_P | Low-power mode enable | Logic-high activates pulse-skipping mode, reducing no-load IQ to 0.5 mA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual synchronous buck converters | Eliminates need for 4 external MOSFETs; reduces BOM count and layout area vs discrete solutions |
| 180° out-of-phase operation | Halves input ripple current magnitude, allowing smaller input capacitance and lower EMI filter cost |
| Programmable current limit per channel | Enables optimized inductor selection-smaller, lower-cost parts possible without sacrificing safety margin |
| Dedicated USB switch with overcurrent protection | Provides regulated 5 V USB port with fault reporting (USB_nILIM) and thermal shutdown-no external switch needed |
| Independent soft-start and enable pins | Supports precise power sequencing across multiple rails (e.g., core before I/O) without external controllers |
| V3V and V7V internal LDOs | Supply bias for external circuitry (e.g., microcontroller, level shifters) while buck converters are disabled in low-power mode |
Applications
| DTV Set-Top Box | Cable Modem |
|---|---|
Use Scenario: Powering SoC core (1.2 V), DDR memory (1.5 V or 1.35 V), and USB peripheral interface from 12 V wall adapter. IC Role / Device Role / Timing Role: Dual-buck PMIC delivers tightly regulated, sequenced, and monitored rails; USB switch supplies downstream peripherals. Use Value: Reduces component count by integrating two high-current bucks + USB switch + supervisor in one 5 mm × 5 mm package. |
Use Scenario: Generating 3.3 V for PHY and 1.2 V for baseband processor in compact cable modem design. IC Role / Device Role / Timing Role: Primary power controller with independent EN/SS pins enabling staggered startup to avoid inrush current overload. Use Value: Out-of-phase operation cuts input capacitor RMS current by ~30%, enabling smaller 10-µF X7R ceramics instead of larger tantalums. |
| Home Gateway Router | Car DVD Player |
Use Scenario: Supplying CPU, Wi-Fi SoC, and USB host controller from automotive-grade 12 V input with transient tolerance. IC Role / Device Role / Timing Role: Dual-buck regulator with UVLO (4.1 V) and thermal shutdown (160 °C) ensures robust operation under vehicle battery fluctuations. Use Value: Integrated PGOOD with 256-ms delay guarantees clean system reset before firmware execution begins. |
Use Scenario: Delivering 5 V USB charging port and 3.3 V display controller rail from noisy 12 V automotive supply. IC Role / Device Role / Timing Role: USB switch with programmable current limit (via rUSB) and overcurrent alarm (USB_nILIM) meets USB BC 1.2 requirements. Use Value: Built-in V3V LDO powers MCU during buck shutdown in sleep mode-reducing system standby current to <1 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65261RHBR | Higher max input (20 V), fixed 1.5-MHz switching, no USB switch, adds third buck (1.5 A) | Targeted at industrial 24-V systems; lacks integrated USB functionality | Choose when higher input voltage range and triple-rail capability outweigh loss of USB integration |
| MP8765GQ-Z | Single-chip dual-buck (3 A/2 A), 4.5–18 V input, no USB switch, no integrated LDOs, no PGOOD timer | Requires external supervisor and USB switch; simpler feature set, lower cost | Choose for cost-sensitive designs where USB and LDO integration are not required |
Compared with TPS65252RHDR, TPS65261RHBR offers wider input range and extra buck channel but removes USB functionality, while MP8765GQ-Z provides basic dual-buck regulation at lower cost but demands external components for supervision and USB support.
Availability
TPS65252RHDR is available at Aetrix Electronics and suitable for DTV set-top boxes, home gateways, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS65252RHDR 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 leader specializing in analog and embedded processing technologies, with decades of expertise in power management IC design and high-volume manufacturing.
The TPS65252RHDR belongs to TI's integrated power management IC product line, engineered specifically for space-constrained consumer and networking equipment needing dual high-current rails plus USB power delivery in a single package.
FAQ
What is the maximum supported input voltage for the TPS65252RHDR?
The TPS65252RHDR supports an absolute maximum input voltage of 18 V on VIN1 and VIN2 pins, with recommended operating range from 4.5 V to 16 V. Operation above 16 V risks exceeding safe operating area limits and may trigger internal UVLO or damage the device. Always maintain input transients within ±0.3 V of rated VIN per absolute maximum ratings.
How do I configure the TPS65252RHDR for 180° out-of-phase operation?
The TPS65252RHDR performs 180° out-of-phase operation automatically-no configuration is required. This phase relationship is hardwired internally to reduce input ripple current and simplify EMI filtering. The timing is fixed and cannot be disabled or altered via pins or registers.
Can the TPS65252RHDR USB switch deliver full 5 V to downstream devices?
Yes-the TPS65252RHDR USB switch (pins USB_VIN, USB_VO, USB_EN) delivers regulated 5 V output when USB_VIN is supplied with 3.3–6 V and USB_EN is asserted high. Output voltage accuracy is maintained within ±3% across load and temperature, meeting USB 2.0 specification requirements for host ports.
What is the purpose of the LOW_P pin on the TPS65252RHDR?
The LOW_P pin on the TPS65252RHDR enables pulse-skipping mode across both buck converters when driven high (≥1.55 V). This reduces light-load quiescent current from 10 mA to 0.5 mA, significantly improving standby efficiency in always-on consumer devices like set-top boxes and gateways.
Does the TPS65252RHDR include overvoltage protection on its buck outputs?
Yes-the TPS65252RHDR includes overvoltage transient protection (OVP) that disables the high-side FET if FB voltage exceeds 109% of the 0.8 V reference (i.e., >0.872 V), preventing output overshoot. Recovery occurs when FB falls below 107% (0.856 V), restoring normal switching on the next cycle.
TPS65252RHDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 15V
- Current - Output:
- 3A, 2A
- Frequency - Switching:
- 300kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-VQFN (5x5)
TPS65252RHDR FAQ
1.How can I place an order for TPS65252RHDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65252RHDR 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 TPS65252RHDR reliable?
The price and inventory of TPS65252RHDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65252RHDR is usually 5 days.
3.What payment methods are accepted for TPS65252RHDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65252RHDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65252RHDR?
TPS65252RHDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65252RHDR 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 TPS65252RHDR?
For technical support, including TPS65252RHDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65252RHDR requirements.
6.How does Aetrix verify that TPS65252RHDR is sourced from the original manufacturer or authorized distributors?
All TPS65252RHDR 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 TPS65252RHDR meets industry standards.
7.What is the process for return or replacement of TPS65252RHDR?
All TPS65252RHDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65252RHDR, 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 TPS65252RHDR part is unused and in its original packaging.
Return procedure for TPS65252RHDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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