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Product Detailed Parameters
- Description：IC REG QD BCK/LNR 2MHZ 28VQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Topology：Step-Down (Buck) (2), Linear (LDO) (2)
- Number of Outputs：4
- Frequency - Switching：2MHz
- Voltage/Current - Output 1：0.7V ~ 3.36V, 3A
- Voltage/Current - Output 2：0.7V ~ 3.36V, 3A
- Voltage/Current - Output 3：0.8V ~ 3.3V, 300mA
- w/LED Driver：No
- w/Supervisor：No
- w/Sequencer：No
- Voltage - Supply：2.5V ~ 5.5V
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：28-VFQFN Exposed Pad
- Supplier Device Package：28-VQFN (5x5)
- Grade：-
- Qualification：-
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Overview
The LP873347RHDR is a specialized power management IC from Texas Instruments, housed in a VQFN-28 package. It integrates dual high-current buck converters and dual linear regulators. The input voltage range spans 2.8 V to 5.5 V. Buck converter outputs are adjustable from 700 mV to 3.36 V with a maximum current of 3 A. Linear regulator outputs range from 800 mV to 3.3 V. Operating temperatures extend from -40°C to +125°C.
Feature Summary
- Integrates dual high-current synchronous buck converters for efficient voltage step-down.
- Includes dual low-noise linear regulators suitable for sensitive analog loads.
- Features a compact VQFN-28 footprint to minimize board space requirements.
Applications
- Industrial appliances
- Test and measurement equipment
Procurement Notes
Verify the specific suffix RHDR corresponds to the required reel packaging configuration. Confirm moisture sensitivity handling procedures are followed during assembly. Ensure the design supports the specified thermal dissipation for the VQFN-28 package under maximum load conditions. Cross-reference the exact output voltage ranges against system requirements before finalizing the component selection.
Selection Notes
Select this component when both high-current digital rails and low-noise analog supplies are required from a single source. The integrated topology reduces external component count compared to discrete solutions. Evaluate the thermal performance within the enclosure to ensure operation remains within the -40°C to +125°C range. Consider the 2.8 V to 5.5 V input window compatibility with the primary power bus.
Part Context
This device belongs to the LP8733 series of multi-channel PMICs designed for space-constrained applications. It combines switching regulation efficiency with linear regulator precision. The family targets systems requiring multiple distinct voltage levels from a common input source without excessive PCB area usage.
Replacement Considerations
LP87334FRHDR offers similar functionality but may differ in specific linear regulator configurations or pinout details. LP873364RHDR provides comparable buck capabilities within the same package family. Verify electrical parameters and pin assignments before substituting.
