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RT8128CGSP
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Product Detailed Parameters
- Description：IC REG PWM CONTROLLER 8SOP
- Series：-
- Mfr：Richtek USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：4.5V ~ 13.2V
- Frequency - Switching：300kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Power Good
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Supplier Device Package：8-SOP-EP
- Grade：-
- Qualification：-
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Overview
The RT8128CGSP is a high-efficiency synchronous buck PWM controller from Richtek USA Inc., designed for CPU core, chipset, and DRAM power applications. It features Mach Response technology for fast transient response. The VCC input range is 4.5V to 13.2V, with a power stage input range of 2.5V to 24V. The output voltage is adjustable from 0.6V to 5V. It operates at a fixed switching frequency of 300kHz. The shutdown current is less than 10μA. The device is housed in an 8-SOIC package with an exposed pad (EP) and supports surface mount mounting.
Feature Summary
- Utilizes Mach Response technology for enhanced transient performance
- Supports wide power stage input voltage range up to 24V
- Features low shutdown current for battery-powered efficiency
- Integrated synchronous rectification for high conversion efficiency
Applications
- CPU core voltage regulation
- Chipset power supply
- DRAM power delivery
Procurement Notes
Verify the specific suffix 'GSP' corresponds to the 8-SOIC-EP package and tape-and-reel or cut-tape availability as required by your assembly process. Confirm RoHS compliance status and lead-free designation against the latest manufacturer declaration. Ensure the operating temperature range of -40°C to 85°C meets your environmental specifications. Cross-reference the datasheet revision date to ensure all electrical characteristics match your design requirements.
Selection Notes
Select this component when a fixed 300kHz frequency is acceptable for your EMI constraints. It is suitable for designs requiring a wide input voltage range extending to 24V on the power stage. Consider the 8-SOIC-EP package if thermal dissipation through the exposed pad is necessary. Verify that the external inductor and capacitor values are compatible with the internal error amplifier and compensation network for stable loop operation.
Part Context
This part belongs to the RT8128 family of synchronous buck controllers. It shares functional similarities with the RT8120 series but may differ in specific pinouts or electrical tolerances. The RT8128C variant typically denotes specific manufacturing lot or temperature grade distinctions within the product line. It serves as a standalone controller requiring external MOSFETs for power conversion.
Replacement Considerations
Check for direct pin-to-pin replacements within the RT8128 family, such as other suffixes of RT8128. Verify compatibility with RT8120 series components only if pinout and electrical parameters are identical. Do not assume interchangeability with non-synchronous controllers without verifying gate drive requirements.
