TPS65251RHAT
Active4.5-V TO 18-V INPUT, 3A/2A/2A OUTPUT, SYNCHRONOUS TRIPLE BUCK CONVERTER
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TPS65251RHAT
Active4.5-V TO 18-V INPUT, 3A/2A/2A OUTPUT, SYNCHRONOUS TRIPLE BUCK CONVERTER
Technical Specifications
Parameters and characteristics for this part
| Specification | TPS65251RHAT |
|---|---|
| Current - Output | 2 A, 3 A |
| Frequency - Switching [Max] | 2.2 MHz |
| Frequency - Switching [Min] | 300 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 3 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 40-VFQFN Exposed Pad |
| Supplier Device Package | 40-VQFN (6x6) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 18 V |
| Voltage - Input (Min) [Min] | 4.5 V |
| Voltage - Output (Max) [Max] | 18 V |
| Voltage - Output (Min/Fixed) | 0.8 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 5.52 | |
| 10 | $ 4.96 | |||
| 25 | $ 4.69 | |||
| 100 | $ 4.06 | |||
| Digi-Reel® | 1 | $ 5.52 | ||
| 10 | $ 4.96 | |||
| 25 | $ 4.69 | |||
| 100 | $ 4.06 | |||
| Tape & Reel (TR) | 250 | $ 2.71 | ||
| 500 | $ 2.58 | |||
| Texas Instruments | SMALL T&R | 1 | $ 4.17 | |
| 100 | $ 3.65 | |||
| 250 | $ 2.56 | |||
| 1000 | $ 2.06 | |||
Description
General part information
TPS65251-2 Series
The TPS65251-x features three synchronous wide-input range, high-efficiency buck converters. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application.
The converters can operate in 5-, 9-, 12- or 15-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and close to the input supply. Each converter features an enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit (RLIMx) pin that enables the designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The current mode control allows a simple RC compensation.
The switching frequency of the converters can either be set with an external resistor connected to ROSC pin or can be synchronized to an external clock connected to the SYNC pin if needed. The switching regulators are designed to operate from 300 kHz to 2.2 MHz. 180° out-of-phase operation between Buck 1 and Buck 2, 3 (Buck 2 and 3 run in phase) minimizes the input filter requirements.
Documents
Technical documentation and resources
