TPS51220RHBRG4 Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
Texas Instruments TPS51220RHBRG4 is a dual-output synchronous step-down PWM controller supporting a 4.5 V to 28 V input range in a thermally efficient 32-pin VQFN package. It operates in current-mode control with pulse-width modulation for precise, stable dual-rail regulation up to high switching frequencies. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 32
- Lifecycle
- ACTIVE
- Datasheet
- TPS51220RHBRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPS51220RHBRG4?
- Dual synchronous step-down controller with current-mode PWM enabling independent regulation of two output rails from a single IC
- Wide 4.5 V to 28 V input range supporting 5 V, 12 V, and 24 V bus architectures in a single design
- 32-pin VQFN-EP package with exposed pad for enhanced thermal dissipation in high-current multi-rail power stages
What is TPS51220RHBRG4 used for?
The TPS51220RHBRG4 is engineered for multi-rail point-of-load DC-DC conversion in industrial computers, network equipment, and high-performance embedded systems powered from 12 V bus architectures. Its dual current-mode PWM control allows simultaneous tight regulation of two independent output rails such as 3.3 V and 1.8 V, meeting the dynamic load transient requirements of FPGAs and DSPs. The 28 V input ceiling also accommodates 24 V industrial supply rails, making the device versatile across both telecom and factory automation platforms.
What are the specifications of TPS51220RHBRG4?
| YTEOL | 15 |
| Analog IC - Other Type | DUAL SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 28V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PQCC-N32 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 20A |
| Output Voltage-Max | 12V |
| Output Voltage-Min | 1V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC32,.2SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 333kHz |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the TPS51220RHBRG4 datasheet?
TPS51220RHBRG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS51220RHBRG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does TPS51220RHBRG4 support, and which power bus architectures does it accommodate?
The TPS51220RHBRG4 accepts input voltages from 4.5 V to 28 V, covering the most common intermediate bus voltages including 5 V consumer, 12 V ATX, and 24 V industrial rails. A nominal 12 V input is specified, but the controller operates correctly from USB-PD at 5 V through 24 V factory automation supplies, eliminating the need for different controller variants across product families. The 28 V absolute maximum provides margin for supply transients without endangering the device.
How does the current-mode PWM control architecture in TPS51220RHBRG4 improve load transient response compared to voltage-mode control?
Current-mode control in the TPS51220RHBRG4 samples inductor current on every switching cycle, allowing the inner current loop to respond to load steps within a single switching period rather than waiting for the voltage error amplifier. This reduces peak output voltage deviation during fast load transients, often by 30 % to 50 % compared to voltage-mode designs at the same output capacitance, making the controller suitable for FPGA core rails that demand transient regulation within ±3 % of the setpoint.
Why choose TPS51220RHBRG4's 32-pin VQFN-EP package for a thermally demanding dual-rail power design?
The 32-pin VQFN with exposed pad (EP) transfers heat directly to the PCB copper pour through a solderable thermal slug, achieving a junction-to-board thermal resistance significantly lower than equivalent TSSOP or SOIC packages. In a dual-output design switching at high frequency with total gate-drive losses of several hundred milliwatts, the EP package can maintain junction temperatures at least 20 °C below the 150 °C maximum rating at 85 °C ambient, allowing continuous full-load operation without heatsinks or forced-air cooling.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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