Overview
The CS5308GDWR28 from onsemi is a DC/DC controller designed for dual-output step-down applications. This component is part of the power controllers category and is specifically tailored for high-performance power management solutions. Introduced on May 13, 2002, it has been updated to comply with the latest industry standards, including EU RoHS regulations (2011/65/EU, 2015/863). The CS5308GDWR28 is packaged in a 28-pin SOIC (Small Outline Integrated Circuit) with a tape and reel configuration, making it suitable for high-volume manufacturing and automated assembly processes. This controller is known for its enhanced V2 control method, which combines traditional PWM (Pulse Width Modulation) with an internal PWM ramp and fast-feedback directly from the VCORE to the internal PWM comparator. This approach enhances design flexibility, reduces output voltage jitter, and minimizes filter size and inductor values.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 14 | V |
| Output Voltage Range | - | - | - | V (Adjustable via DAC) |
| Switching Frequency Range | 200 kHz | - | 800 kHz | Hz |
| Maximum Output Current | - | - | 28 A | A |
| Operating Temperature Range | 0°C | - | 70°C | °C |
| Storage Temperature Range | -40°C | - | 150°C | °C |
| Package Type | - | - | 28-Pin SOIC | - |
| Power Good Output Delay | 25 | 50 | 100 | μs |
Key Features
- Enhanced V2 Control Method: Combines traditional PWM with an internal PWM ramp and fast-feedback directly from VCORE to the internal PWM comparator, enhancing design flexibility and reducing output voltage jitter.
- Internal PWM Ramp and Fast-Feedback: Provides greater design flexibility and reduces output voltage jitter.
- Multi-Phase Architecture: Reduces input and output filter ripple, allowing for smaller filter components and increased output inductor current slew rate.
- Adjustable Output Voltage Positioning: Achieved through a 5-bit DAC with 1% tolerance.
- Current Sensing: Current is sensed through sense resistors or output inductors, with adjustable hiccup mode current limit.
- Overvoltage Protection: Implemented through synchronous MOSFETs.
- Individual Current Limits for Each Phase: Ensures balanced current distribution across phases.
- On-Board Current Share Amplifiers: Facilitates current sharing among phases.
- VTT Monitoring and Timing: Includes VTT Power Good (VTTPGD) and VCORE Power Good signals).
- On/Off Control: Controlled through the COMP pin).
- Improved Noise Immunity: Enhanced to ensure reliable operation in noisy environments).
Applications
The CS5308GDWR28 is designed for high-performance power management in various applications, including:
- Processor Power Management: Suitable for powering processors in high-end computing systems, such as those used in servers and workstations.
- Multi-Output Power Supplies: Ideal for DC to DC multi-output power supplies where multiple voltage rails are required).
- High-Current DC/DC Conversion: Used in applications requiring high current output, such as in data centers and telecommunications equipment).
- Embedded Systems: Can be integrated into embedded systems that require efficient and reliable power management).
Q & A
- What is the primary function of the CS5308GDWR28?
The CS5308GDWR28 is a DC/DC controller designed for dual-output step-down applications, optimizing power management in high-performance systems.
- What is the Enhanced V2 control method used in the CS5308GDWR28?
The Enhanced V2 control method combines traditional PWM with an internal PWM ramp and fast-feedback directly from VCORE to the internal PWM comparator, enhancing design flexibility and reducing output voltage jitter.
- What are the key benefits of the multi-phase architecture in the CS5308GDWR28?
The multi-phase architecture reduces input and output filter ripple, allowing for smaller filter components and increased output inductor current slew rate, which in turn reduces overall solution size and cost.
- How is the output voltage adjusted in the CS5308GDWR28?
The output voltage is adjusted through a 5-bit DAC with 1% tolerance, allowing for precise voltage positioning.
- What protection features are included in the CS5308GDWR28?
The CS5308GDWR28 includes overvoltage protection through synchronous MOSFETs and adjustable hiccup mode current limit.
- How does the CS5308GDWR28 ensure current sharing among phases?
The CS5308GDWR28 uses on-board current share amplifiers to facilitate current sharing among phases, ensuring balanced current distribution.
- What are the VTT monitoring and timing features in the CS5308GDWR28?
The CS5308GDWR28 includes VTT Power Good (VTTPGD) and VCORE Power Good signals for monitoring and timing.
- How is the on/off control implemented in the CS5308GDWR28?
The on/off control is implemented through the COMP pin.
- What is the operating temperature range of the CS5308GDWR28?
The operating temperature range of the CS5308GDWR28 is from 0°C to 70°C.
- What is the storage temperature range of the CS5308GDWR28?
The storage temperature range of the CS5308GDWR28 is from -40°C to 150°C.
