DC-DC Controller
Multiple Phase Buck Controller
uP9509S
3/2/1-Phase Synchronous-Rectified Buck Controller for Mobile GPU Power
Datasheets PDF
General Description
The uP9509S is a 3/2/1-phase synchronous-rectified buck controller specifically designed to work with 3V ~ 26V input voltage and deliver high quality output voltage for highperformance graphic processor power.The uP9509S adopts proprietary RCOTTM technology, providing flexible selection of output LC filter and excellent transient response to load and line change.
The uP9509S supports NVIDIA Open Voltage Regulator2+ with PWMVID feature. The PWMVID input is buffered and filtered to generate accurate reference voltage, and the output voltage is precisely regulated to the reference input.The uP9509S integrates two bootstrapped MOSFET gate drivers and one PWM output achieving optimal balance between cost and flexibility. The uP9509S uses MOSFET RDS(ON) current sensing for channel current balance.
Other features include accurate and reliable over current limit protection, adjustable on-time setting, power saving control input, and power good output. This part is available in a VQFN4x4 – 24L package.
Pin Configuration & Typical Application Circuit
1-Phase Mode
2-Phase Mode
3-Phase Mode
Feature
- Support NVIDIA’s Open VReg Type-2+ PWMVID Technology
- Wide Input Voltage Range 3V ~ 26V
- Robust Constant On-Time Control
- 3/2/1 Phase Operation
- Two Integrated MOSFET Drivers with ShootThrough Protection and Internal Bootstrap Schottky Diode
- Adjustable Current Balancing by RDS(ON) Current Sensing
- Adjustable Operation Frequency
- External Compensation
- Dynamic Output Voltage Adjustment
- Adjustable Per-Phase Over Current Limit
- Adjustable Soft-Start Time
- Power Good Indication
- Over Voltage Protection
- Under Voltage Protection
- Over Temperature Protection
- RoHS Compliant and Halogen Free
Application
- Middle-High End GPU Core Power
- High End Notebook PC Memory Core Power
- Low Output Voltage, High Power Density DC-DC Converters
- Voltage Regulator Modules