TPS51125 TPS51125RGET TPS51125RGER IC
Product Title: TPS51125RGER (Marking: TPS51125) Dual Synchronous Step-Down Controller IC for 3.3V/5V Standby Power (VQFN-24)
Product Specifications:
- Part Number: TPS51125RGER / TPS51125 / TPS51125RGET (Top Marking Code: TPS51125)
- Device Type: Dual Synchronous Step-Down (Buck) Controller IC for Main Standby Power Supplies
- Package / Case: VQFN-24 / QFN-24 4x4 (Surface Mount)
- Pin Count: 24 Pins
- Input Voltage Range: 5.5V to 28V
- Dual Primary Outputs: Adjustable 3.3V and 5V Switch-Mode Power Supplies (SMPS)
- Integrated Auxiliary Regulators: Dual Always-On Low-Dropout Regulators (5V LDO @ 100mA / 3.3V LDO @ 100mA)
- Control Architecture: D-CAP™ Mode for Fast Transient Response and Out-of-Audio™ Operation
Short Description: High-efficiency Texas Instruments TPS51125 (top marking: TPS51125) dual synchronous step-down PWM controller IC in a compact 24-pin VQFN package. Specifically designed for generating the primary 3.3V and 5V system standby power rails in laptop motherboards, notebook computers, and embedded power systems. Features integrated 100mA dual LDO linear regulators, Out-of-Audio light-load pulse-skipping mode for noise elimination, power-good monitoring, and full protection features (OVP, UVP, OCP, OTP). Essential for component-level laptop motherboard repairs, fixing missing 3.3V/5V standby power rails, resolving dead/no-power motherboard symptoms, and replacing shorted primary power ICs.
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