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Product Detailed Parameters
- Description：IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR)
- Function：Step-Up
- Output Configuration：Negative
- Topology：Buck, Boost, Flyback, Forward Converter, SEPIC
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：2.7V
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：-2.45V
- Voltage - Output (Max)：-40V (Switch)
- Current - Output：1.5A (Switch)
- Frequency - Switching：280kHz
- Synchronous Rectifier：No
- Operating Temperature：0°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The CS5172GDR8G is a negative output switching regulator from onsemi, featuring an integrated 1.5 A switch and operating at a fixed frequency of 280 kHz. It supports multiple topologies including boost, buck, flyback, forward, and SEPIC configurations. The device accepts an input voltage range of 2.7 V to 30 V and provides an adjustable negative output ranging from -2.45 V to -40 V. Packaged in an 8-SOIC (3.90 mm wide) surface-mount housing, it operates within a junction temperature range of 0°C to 125°C.
Feature Summary
- Supports versatile power conversion topologies including boost, buck, flyback, forward, and SEPIC for flexible system design.
- Integrates a high-efficiency 1.5 A power switch to minimize external component count and board space.
- Utilizes current-mode control with pulse width modulation for stable regulation under varying load conditions.
Applications
- Negative voltage generation for analog circuits requiring dual power supplies
- LCD bias voltage generation in display systems
- Industrial sensor interface power conditioning
Procurement Notes
Verify the specific suffix GDR8G against official datasheets to confirm package dimensions and tape-and-reel specifications. Confirm RoHS compliance status as indicated in the manufacturer documentation. Check for obsolescence notices or product change notifications prior to finalizing procurement plans.
Selection Notes
Select this component when a negative adjustable output is required with moderate current demands up to 1.5 A. Ensure the application topology matches the device's capability for boost, buck, or isolated configurations. Verify that the input voltage range aligns with the system supply rails and that thermal management accommodates the SOIC-8 package constraints.
Part Context
This part belongs to the CS517x family of switching regulators, which includes variants like CS5171, CS5173, and CS5174. These devices share similar architectural features but differ in switching frequencies and specific electrical characteristics. The CS5172 specifically targets applications requiring a 280 kHz operation frequency for balanced efficiency and size.
Replacement Considerations
Public records indicate the CS5172GDR8G has been discontinued. Designers should consult official substitution guides for compatible alternatives such as the CS5174GDR8G, ensuring pin compatibility and electrical parameter alignment before implementation.
