ispPAC-POWR6AT6

Lattice's Power Manager II ispPAC-POWR6AT6 is a general-purpose power-supply monitoring and margining controller, incorporating in-system programmable analog functions implemented in non-volatile E²CMOS ^®technology. The ispPAC-POWR6AT6 device provides six independent analog input channels to monitor up to six power supply test points. Each of these input channels offers a differential input to support remote ground sensing.

The ispPAC-POWR6AT6 incorporates six DACs for generating a trimming voltage to control the output voltage of a power supply. The trimming voltage can be set to four hardware selectable preset values (voltage profiles) or can be dynamically loaded in to the DAC through the I²C bus. Additionally, each power supply output voltage can be maintained typically within 0.5% tolerance across various load conditions using the Digital Closed Loop Control mode. The operating voltage profile can be selected using external hardware pins.

 Application Block Diagram Power Supply Margin/Trim  Control 6 Analog Monitor Inputs I²C  Interface 6 Analog Trim Outputs ADC ispPAC-POWR6AT6 3.3V 2.5V 1.8V POL#1 POL#2 POL#3 Other Board Circuitry Trim Vout Trim Vout Trim Vout Trim Vout Trim Vout Trim Vout CPU I²C Bus The on-chip 10-bit A/D converter can both be used to monitor the V MON voltage through the I²C bus as well as for implementing digital closed loop mode for maintaining the output voltage of all power supplies controlled by the monitoring and trimming section of the ispPACPOWR6AT6 device.

The I²C bus/SMBus interface allows an external microcontroller to measure the voltages connected to the V MON analog monitor inputs and load the DACs for the generation of the trimming voltages of the external DCDC converters.