In-System Programmable Power Supply - Lattice Semiconductor
Description
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ispPAC-POWR607
In-System Programmable Power Supply Supervisor, Reset Generator and Watchdog Timer
February 2009 Data Sheet DS1011
®
Features
■ Power-Down Mode ICC < 10µA ■ Programmable Threshold Monitors
• Simultaneously monitors up to six power supplies • Programmable analog trip points (1% step size; 192 steps) • Programmable glitch filter • Power-off detection (75mV)
Application Block Diagram
Input Power Supply On/Off DC-DC #1 Manual Reset In DC-DC #2 DC-DC #n
■ Embedded Programmable Timers
• Four independent timers • 32µs to 2 second intervals for timing sequences
MOSFET Drivers (2)
Power Supply Bus
Voltage Supervisor Reset Generator
■ Embedded PLD for Logical Control
• Rugged 16-macrocell CPLD architecture • 81 product terms / 28 inputs • Implements state machines and combinatorial functions
Interrupt – Power Fail CPU_Reset_in WDT Trigger Interrupt – WDT
Watchdog Timer
■ Digital I/O
• Two dedicated digital inputs • Five programmable digital I/O pins
Power Down
ispPAC-POWR607
Power Up/Down Control
CPU / uProcessor
■ Two High-Voltage FET Drivers
• Power supply ramp up/down control • Independently configurable for FET control or digital output
■ Wide Supply Range (2.
64V to 3.
96V)
• In-system programmable through JTAG • Industrial temperature range: -40°C to +85°C • 32-pin QFNS (Quad Flat-pack, No lead, Sawsingulated) package, lead-free option1
Description
Lattice’s Power Manager II ispPAC-POWR607 is a general-purpose power-supply monitor, reset generator and watchdog timer, incorporating both in-system programmable logic and analog functions implemented in nonvolatile E2CMOS® technology.
The ispPAC-POWR607 device provides six independent analog input channels to monitor power supply voltages.
Two general-purpose digital inputs are also provided for miscellaneous control functions.
The ispPAC-POWR607 provides up to seven open-drain digital outputs that can be used for controlling DC-DC
1.
Use 32-pin QFNS package for all new desig...
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