ISPPAC-POWR1220AT8 Datasheet, PDF (1/54 Pages) Lattice Semiconductor – In-System Programmable Power Supply Monitoring, Sequencing and Margining Controller

ispPAC-^® POWR1220AT8
In-System Programmable Power Supply
Monitoring, Sequencing and Margining Controller
June 2008
Data Sheet DS1015
Features
■ Monitor, Control, and Margin Multiple
Power Supplies
• Simultaneously monitors up to 12 power
supplies
• Provides up to 20 output control signals
• Provides up to eight analog outputs for
margining/trimming power supply voltages
• Programmable digital and analog circuitry
■ Power Supply Margin and Trim Functions
• Trim and margin up to eight power supplies
• Dynamic voltage control through I²C
• Four hardware selectable voltage profiles
• Independent Digital Closed-Loop Trim function
for each output
■ Embedded PLD for Sequence Control
• 48-macrocell CPLD implements both state
machines and combinatorial logic functions
■ Embedded Programmable Timers
• Four independent timers
• 32µs to 2 second intervals for timing sequences
■ Analog Input Monitoring
• 12 independent analog monitor inputs
• Differential inputs for remote ground sense
• Two programmable threshold comparators per
analog input
• Hardware window comparison
• 10-bit ADC for I²C monitoring
■ High-Voltage FET Drivers
• Power supply ramp up/down control
• Programmable current and voltage output
• Independently configurable for FET control or
digital output
■ 2-Wire (I²C/SMBus™ Compatible) Interface
• Comparator status monitor
• ADC readout
• Direct control of inputs and outputs
• Power sequence control
• Dynamic trimming/margining control
■ 3.3V Operation, Wide Supply Range 2.8V to
3.96V
• In-system programmable through JTAG
• Industrial temperature range: -40°C to +85°C
• 100-pin TQFP package, lead-free option
Application Block Diagram
Primary
Supply
3.3V
Primary
Supply
Primary
Supply
2.5V
1.8V
Primary
Supply
POL#1
Primary
Supply
POL#N
8 Analog
Trim
Outputs
Power Supply
Margin/Trim
Control Block
ADC
4 Timers
ispPAC-POWR1220AT8
Other Control/Supervisory
Signals
16 Digital
Outputs
4 MOSFET
Drivers
CPLD
48 Macrocells
83 Inputs
6 Digital
Inputs
I²C
Interface
I²C
Bus
CPU
Description
Lattice’s Power Manager II ispPAC-POWR1220AT8 is a
general-purpose power-supply monitor, sequence and
margin controller, incorporating both in-system pro-
grammable logic and in-system programmable analog
functions implemented in non-volatile E²CMOS^® tech-
nology. The ispPAC-POWR1220AT8 device provides 12
independent analog input channels to monitor up to 12
power supply test points. Each of these input channels
offers a differential input to support remote ground
sensing, and has two independently programmable
comparators to support both high/low and in-bounds/
out-of-bounds (window-compare) monitor functions. Six
general-purpose digital inputs are also provided for mis-
cellaneous control functions.
The ispPAC-POWR1220AT8 provides 20 open-drain
digital outputs that can be used for controlling DC-DC
converters, low-drop-out regulators (LDOs) and opto-
couplers, as well as for supervisory and general-pur-
pose logic interface functions. Four of these outputs
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notice.
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