ISPPAC-POWR1208P1 Datasheet, PDF (1/34 Pages) Lattice Semiconductor – In-System Programmable Power Supply Sequencing Controller and Precision Monitor

ispPAC^®-POWR1208P1
In-System Programmable Power Supply
Sequencing Controller and Precision Monitor
February 2005
Data Sheet DS1033
Features
■ Monitor and Control Multiple Power
Supplies
• Simultaneously monitors up to 12 power supplies
• Sequence controller for power-up conditions
• Provides eight output control signals
• Programmable digital and analog circuitry
■ Precision Analog Comparators for
Monitoring
• 12 analog comparators for monitoring
• 384 programmable threshold levels spanning
0.68V to 5.93V
• 0.5% precision
• Other user-defined voltages possible
• 80mV near-ground threshold for power-off
detect
• Each comparator independently configurable
• Eight direct comparator outputs
• Digital filter on comparator outputs
■ Embedded PLD for Sequence Control
• Implements state machine and input conditional
events
• In-System Programmable (ISP™) through JTAG
and on-chip E²CMOS^®
• Input synchronizers
■ Embedded Programmable Timers
• 4 Programmable 8-bit timers (32µs to 524ms)
• Programmable time delay between multiple
power supply ramp-up and wait statements
■ Embedded Oscillator
• Built-in clock generator, 1MHz
• Programmable clock frequency
• Programmable timer pre-scaler
• External clock support
■ Programmable Output Configurations
• Four digital outputs for logic and power supply
control
• Four fully programmable gate driver outputs for
FET control, or programmable as four additional
digital outputs
• Expandable with ispMACH™ 4000 CPLD
■ 2.7V to 5.5V Supply Range
• In-system programmable at 3.0V to 5.5V
• Industrial temperature range: -40°C to +85°C
• 44-pin TQFP package
Application Block Diagram
+5V
+ ^DC/DC +
Primary
-
Supply _Gnd
R_G
+3.3V
+ DC/DC +
Primary
-
Supply _Gnd
R_G
+
Primary
-
+2.5V
DC/DC +
Supply Gnd
+
Primary
-
+1.0V
DC/DC +
Supply Gnd
12 Analog Inputs
10uF
R_G
R_G
0.1uF
VDD VDDINP
VMON1
HVOUT1
VMON2
HVOUT2
VMON3
HVOUT3
VMON4
HVOUT4
VMON5
OUT5
VMON6 _{ispPAC-POWR1208P1} OUT6
VMON7
OUT7
VMON8 Power Sequence OUT8
V_DD
VMON9
VMON10
Controller
Comp1
Comp2
VMON11
Comp3
VMON12
Comp4
CLK
Comp5
RESET
IN1
IN2
IN3
IN4
Comp6
Comp7
Comp8
POR
CREF
0.1uF
+5V
Circuits
+3.3V
Circuits
+2.5V
Circuits
+1V
Circuits
OE/EN
DC/DC Supply
or Regulator
3.3V
OE/EN
DC/DC Supply
or Regulator
EN
Digital
3.3V
Logic
EN
Digital
Logic
Description
The Lattice ispPAC-POWR1208P1 incorporates both in-
system programmable logic and in-system programma-
ble analog circuits to perform special functions for
power supply sequencing and monitoring. The ispPAC-
POWR1208P1 device has the capability to be config-
ured through software to control up to eight outputs for
power supply sequencing and 12 comparators monitor-
ing supply voltage limits, along with four digital inputs for
interfacing to other control circuits or digital logic. Once
configured, the design is downloaded into the device
through a standard JTAG interface. The circuit configu-
ration and routing are stored in non-volatile E²CMOS.
PAC-Designer,^® an easy-to-use Windows-compatible
software package gives users the ability to design and
simulate logic and sequences that control the power
supplies or FET driver circuits. The user has control
over timing functions, programmable logic functions and
comparator threshold values as well as I/O configura-
tions.
© 2005 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.
www.latticesemi.com
3-1
DS1033_01.0