POWR6AT6 Datasheet, PDF (1/34 Pages) Lattice Semiconductor – In-System Programmable Power Supply Monitoring and Margining Controller

ispPAC-^® POWR6AT6
In-System Programmable Power Supply
Monitoring and Margining Controller
April 2006
Preliminary Data Sheet
Features
Application Block Diagram
■ Power Supply Margin and Trim Functions
• Trim and margin up to six power supplies
• Dynamic voltage control through I²C
• Four hardware selectable voltage profiles
• Independent Digital Closed-Loop Trim function
for each output
■ Analog Input Monitoring
• Six analog monitor inputs
• Differential input architecture for accurate
remote ground sensing
• 10-bit ADC for direct voltage measurements
■ 2-Wire (I²C/SMBus™ Compatible) Interface
• Readout of the ADC
• Dynamic trimming/margining control
■ Other Features
• Programmable analog circuitry
• Wide supply range, 2.8V to 3.96V
• In-system programmable through JTAG
• Industrial temperature range: -40°C to +85°C
• 32-pin QFN package, only 5mm x 5mm, lead-
free option
Description
Vout
3.3V
Trim
Vout
2.5V
Trim
Vout
1.8V
Trim
Vout
POL#1
Trim
Vout
POL#2
Trim
Vout
POL#3
Trim
6 Analog
Trim Outputs
Power Supply
Margin/Trim
Control
6 Analog
Monitor Inputs
ADC
I² C
Interface
CPU
I²C
Bus
Lattice’s Power Manager II ispPAC-POWR6AT6 is a
general-purpose power-supply monitoring and margin-
ing 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 chan-
nels offers a differential input to support remote ground
sensing.
The ispPAC-POWR6AT6 incorporates six DACs for gen-
erating 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.
ispPAC-POWR6AT6
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 maintain-
ing the output voltage of all power supplies controlled by
the monitoring and trimming section of the ispPAC-
POWR6AT6 device.
The I²C bus/SMBus interface allows an external micro-
controller 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 DC-
DC converters.
© 2006 Lattice Semiconductor Corp. All Lattice trademarks, registered trademarks, patents, and disclaimers are as listed at www.latticesemi.com/legal. All other
brand or product names are trademarks or registered trademarks of their respective holders. The specifications and information herein are subject to change without
notice.
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