TPS65251RHAR Switching Voltage Regulators PMU with 3 DC/DC Converters

Short Description:

Manufacturers: Texas Instruments
Product Category: PMIC – Voltage Regulators – DC DC Switching Regulators
Data Sheet: TPS65251RHAR
Description: IC REG BCK ADJ 3A/2A TRPL 40VQFN
RoHS status: RoHS Compliant


Product Detail

Features

Applications

Product Tags

♠ Product Description

Product Attribute Attribute Value
Manufacturer: Texas Instruments
Product Category: Switching Voltage Regulators
RoHS:  Details
Mounting Style: SMD/SMT
Package / Case: VQFN-40
Topology: Buck
Output Voltage: 800 mV to 17 V
Output Current: 3 A
Number of Outputs: 3 Output
Input Voltage, Min: 4.5 V
Input Voltage, Max: 18 V
Quiescent Current: 1 mA
Switching Frequency: 300 kHz to 2.2 MHz
Minimum Operating Temperature: - 40 C
Maximum Operating Temperature: + 125 C
Series: TPS65251
Packaging: Reel
Packaging: Cut Tape
Packaging: MouseReel
Brand: Texas Instruments
Development Kit: TPS65251EVM
Input Voltage: 4.5 V to 18 V
Moisture Sensitive: Yes
Operating Supply Current: 20 mA
Product Type: Switching Voltage Regulators
Factory Pack Quantity: 2500
Subcategory: PMIC - Power Management ICs
Unit Weight: 0.003527 oz

♠ TPS65251 4.5-V to 18-V Input, High-Current, Synchronous Step-Down Three Buck Switcher With Integrated FET

The TPS65251 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 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 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 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.


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  • • Wide Input Supply Voltage Range (4.5 to 18 V)

    • 0.8 V, 1% Accuracy Reference

    • Continuous Loading: 3 A (Buck 1), 2 A (Buck 2 and 3)

    • Maximum Current: 3.5 A (Buck 1), 2.5 A (Buck 2 and 3)

    • Adjustable Switching Frequency 300 kHz to 2.2 MHz Set by External Resistor

    • Dedicated Enable for Each Buck

    • External Synchronization Pin for Oscillator

    • External Enable/Sequencing and Soft-Start Pins

    • Adjustable Current Limit Set By External Resistor

    • Soft-Start Pins

    • Current-Mode Control With Simple Compensation Circuit

    • Powergood

    • Optional Low-Power Mode Operation for Light Loads

    • VQFN Package, 40-Pin 6 mm × 6 mm RHA

    • Set Top Boxes

    • Blu-ray DVD

    • DVR • DTV

    • Car Audio/Video

    • Security Camera

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