Analog Devices / Maxim Integrated MAX34440 PMBus 6-Channel Power Supply Manager
Analog Devices MAX34440 6-Channel Power-Supply Manager is a PMBus™-compliant, highly integrated system monitor based upon a 16-bit MAXQM microcontroller with factory-programmed functionality to monitor up to six power supplies. MAX34440 provides power-supply closed-loop control and local/remote thermal-sensing facilities.
MAX34440 monitors the power-supply output voltage and continually checks for user-programmable overvoltage and under-voltage thresholds. This Analog Devices device is designed to margin the power-supply output voltage up or down to a user-programmable level in a closed-loop arrangement. The closed-loop arrangement allows the MAX34440 to automatically adjust a pulse-width-modulated (PWM) output and then measure the resulting output voltage. This Maxim Power-Supply Manager can also sequence the supplies in any order at both power-up and power-down. Using an external current-sense amplifier, Maxim Integrated's MAX34440 6-Channel Power-Supply Manager can also monitor currents.
Thermal monitoring is performed using up to eight temperature sensors, including an on-chip thermal sensor, four DS75LV digital thermometers, and a MAX6695 dual remote/local thermal temperature sensor. Communication with the DS75LV and MAX6695 temperature sensors is conducted through a dedicated I2C / SMBus interface.
Features
- 6 Channels of power-supply management
- Voltage measurement/monitoring
- Differential 12-Bit 1% accurate ADC
- Min/max threshold excursion detection
- Supports current monitoring with external current-sense amplifier
- Automatic closed-loop margining
- Programmable up and down sequencing
- Power-good output
- Supports up to eight temperature sensors
- Two remote diode temperature sensors
- Five local temperature sensors
- One internal temperature sensor
- Fault detection on all temp sensors
- PMBus™-Compliant command interface
- I²C/SMBus-compatible serial bus with bus timeout function
- On-board nonvolatile fault logging and default configuration setting
- No external clocking required
- +3.3V Supply voltage
Specifications
- 5ms Reset delay time
- 2.7V to 5.5V Supply voltage
- -40°C to +85°C Operating temperature
- SMD/SMT Mounting style
- TQFN-40 EP Package / case
- 2.86W Maximum power dissipation
- 2.5mA Operating supply current
- Power fail detection
- Voltage supervisory type
Applications
- Base stations
- Industrial controls
- Network switches/routers
- Servers
- Smart grid network systems
Block Diagram
