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Product Detailed Parameters
- Description：IC REG BUCK ADJ 4A 28HTSSOP
- Series：-
- Mfr：Renesas Electronics Corporation
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：6V
- Current - Output：4A
- Frequency - Switching：200kHz ~ 1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-HTSSOP
- Grade：-
- Qualification：-
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Overview
The EL7554IREZ is a monolithic synchronous step-down DC/DC switching regulator manufactured by Renesas Electronics Corporation. It delivers a continuous output current of 4A with an adjustable output voltage range from 0.8V to 6V. The device operates within an input voltage window of 3V to 6V and supports a programmable switching frequency between 200kHz and 1MHz. It features integrated synchronous rectification for high efficiency and is housed in a 28-HTSSOP package with an exposed pad, designed for surface-mount installation.
Feature Summary
- Integrated synchronous rectification topology for improved power conversion efficiency
- Adjustable output voltage capability via external resistor network
- Programmable switching frequency allows optimization for size or performance
- Built-in thermal protection mechanisms for operational reliability
Applications
- Portable computing devices requiring efficient power management
- Industrial control systems utilizing low-voltage logic supplies
- Communication infrastructure equipment needing stable DC rails
- Battery-powered consumer electronics demanding extended runtime
Procurement Notes
Verify component status as the EL7554IREZ is listed as obsolete by the manufacturer. Confirm availability through authorized distributors or secondary markets. Ensure compatibility with RoHS3 standards if required. Check moisture sensitivity level (MSL 3) handling requirements during storage and assembly to prevent damage. Validate that the 28-HTSSOP footprint matches the design PCB layout.
Selection Notes
Select this component when a compact, high-efficiency buck converter is needed for inputs up to 6V. The 4A output current rating suits moderate load applications. Consider the 28-pin HTSSOP package constraints for board space. Evaluate the need for external compensation components based on the desired crossover frequency and stability margins. Compare against newer Renesas alternatives if long-term supply assurance is critical.
Part Context
The EL7554 belongs to the EL7554 series of LDFree synchronous step-down regulators. It shares architectural similarities with other members like the EL7554IREZ-T7 and EL7554IREZ-T13, differing primarily in packaging quantities and reel specifications. The series targets applications requiring small solution sizes and high efficiency in low-voltage environments.
Replacement Considerations
Direct substitutes include EL7554IREZ-T7 and EL7554IREZ-T13, which share identical electrical characteristics and pinouts but differ in tape-and-reel packaging. Verify that any replacement maintains the 28-HTSSOP package and 4A current rating.
