MAX20796
Dual-Phase Scalable Integrated Voltage Regulator with PMBus Interface
Smallest, High Efficiency, 60A Fully Integrated Two-Phase Switching Voltage Regulator
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The MAX20796 offers a fully integrated, highly efficient, two-phase switching regulator for applications operating from 4.5V to 16V and requiring up to 60A maximum load or 90A with an optional third-phase external power stage. The output voltage range can be configured from 0.5V to 5.5V with some restrictions on duty cycle. The switching regulator uses a fixed-frequency control scheme providing an extremely compact, fast, and accurate power delivery solution for server and telecom applications. Integrated linear regulators allow single-supply operation. To further improve system efficiency and thermal performance, an external 3.3V supply or FET can be used to generate the core supply.
Key system parameters are configured by external resistors, including the selection of soft-start timing, output voltage, switching frequency, PMBus address, overcurrent trip point, and loop control parameters. The device operates with either coupled or discrete inductors. Coupled inductor technology offers high performance with a minimum number of input and output capacitors for best-in-class solution cost.
The MAX20796 includes fault protection and reporting capabilities. Inherent positive and negative overcurrent and overtemperature protection ensure a rugged design. Input undervoltage lockout shuts down the device when the input voltage is out of specification. Regulation is halted if the output voltage is outside of a programmable range. A PGOOD pin provides an output signal to show that the output voltage is within range and the system is regulating.
The MAX20796 is offered in a 35-pin, 4 × 10.5mm FC2QFN package, ideal for use in networking and communication end equipment.
The device is also available as MAX20796A, which is preconfigured for a 1V, 800kHz application with LEAD_LAG enabled.
关键特性
- Peak Efficiency 92%; Full-Load Efficiency 90% at VIN = 12V, VOUT = 1V
- Operating Input Voltage Range 4.5V to 16V
- Output Voltage Range is 0.5V to 5.5V
- Output Boot Voltage Pin-Strapped Range 0.5V to 5.0V with Direct Feedback
- Integrated Loop Compensation
- Supports Coupled and Discrete Inductors
- PMBus Revision 1.3 Compliant Interface
- Supports External Power Stage to Increase Power Capacity
- Internal Linear Regulators Allow Operation from One Supply Voltage
- Optional External LDO FET for Enhanced Thermal Performance
- Pin-Strapped Configurable Operating Parameters:
- 32 PMBus Addresses
- Output Voltage
- Switching Frequency
- Overcurrent Protection (OCP) Threshold
- Soft-Start Time
- Loop Compensation
- Continuous Conduction Mode Operation Only
- Integrated Accurate Current and Temperature Sensing
- Monotonic Startup and Shutdown, Supports Prebias Startup (Two-Phase)
- Fast Peak and Average Overcurrent Protection
- Active-Low RESTORE Input Pin Resets Output Voltage
- Operating Junction Temperature Range: -40°C to 125°C
- Package: 35-pin, 4 ×10.5mm, 0.5mm pitch, FC2QFN
应用
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- 存储器VDDQ
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- 负载点稳压器
