Overview
The L6758ATR, produced by STMicroelectronics, is a high-performance dual controller designed specifically for powering Intel VR12 processors. This integrated circuit is part of the L6758A family and is optimized for high-current VRM (Voltage Regulator Module) and VRD (Voltage Regulator Down) applications in desktops, servers, workstations, and new generation CPUs. The device features advanced technologies such as second-generation LTB (Load Transient Boost) Technology, dynamic phase management, and adaptive voltage positioning to ensure efficient and stable power delivery under various load conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Input | 10.8V ~ 13.2V | V |
| Number of Outputs | 2 | - |
| Voltage - Output | 0.25V ~ 1.52V | V |
| Package | VFQFPN48 6x6 mm | - |
| Thermal Resistance Junction-to-Ambient | 40 °C/W | °C/W |
| Maximum Junction Temperature | 150 °C | °C |
| Supply Current (VCC = 5 V ± 5%, EN = high) | 22 mA | mA |
| Main Oscillator Frequency | 180 ~ 220 kHz | kHz |
| Output Voltage Accuracy | 0.5% | % |
Key Features
- VR12 compliant with 25 MHz SVID bus rev 1.5, supporting serialVID with programmable IMAX, TMAX, VBOOT, and ADDRESS.
- Second-generation LTB Technology for fast load transient response and optimized output filter composition.
- Dual controller: two-to-four phase for core and one phase for graphics (GFX) or system agent (VSA).
- Single NTC design for thermal compensation (TM, LL, and IMON) for each section.
- VFDE and GDC for efficiency optimization.
- Dynamic phase management (DPM) and adaptive voltage positioning (AVP).
- Dual remote sense and fully-differential current sense across DCR.
- Dual independent adjustable oscillator and dual current monitor.
- Pre-biased output management and 5 V supply, 12 V monitor.
- Average and per-phase overcurrent protection, overvoltage, undervoltage, and feedback disconnection protection.
- Dual VR_RDY signals and open-drain VR_HOT alarm signal.
Applications
The L6758ATR is designed for high-current VRM and VRD applications in various systems, including:
- Desktop computers
- Servers
- Workstations
- New generation CPUs requiring VR12 compliance
Q & A
- What is the input voltage range for the L6758ATR?
The input voltage range is 10.8V to 13.2V.
- How many output phases does the L6758ATR support?
The device supports two-to-four phases for the core and one phase for graphics (GFX) or system agent (VSA).
- What is the output voltage accuracy of the L6758ATR?
The output voltage accuracy is 0.5%.
- What is the maximum junction temperature for the L6758ATR?
The maximum junction temperature is 150 °C.
- What package type is the L6758ATR available in?
The device is available in a VFQFPN48 6x6 mm package.
- Does the L6758ATR support dynamic phase management?
Yes, it supports dynamic phase management (DPM).
- What protection features does the L6758ATR have?
The device features overcurrent, overvoltage, undervoltage, and feedback disconnection protection.
- How is the switching frequency programmed in the L6758ATR?
The switching frequency is programmed using the OSC pin with a resistor connected to GND or VCC.
- What is the purpose of the VR_HOT signal in the L6758ATR?
The VR_HOT signal is an open-drain alarm signal asserted when the temperature exceeds TMAX.
- Is the L6758ATR compliant with VR12 specifications?
Yes, it is VR12 compliant with a 25 MHz SVID bus rev 1.5.
