ispPAC-POWR1220AT8-01TN100I Lattice, ispPAC-POWR1220AT8-01TN100I Datasheet - Page 26

• Manufacturer Part Number: ispPAC-POWR1220AT8-01TN100I
• Description: Supervisory Circuits Prec. Power Supply Seq. Monitor Marg.
• Manufacturer: Lattice
• Type: E2CMOSr
• Series: ispPAC®r

Specifications of ispPAC-POWR1220AT8-01TN100I

• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3.3 V
• Number Of Voltages Monitored: 12
• Monitored Voltage: Adj
• Undervoltage Threshold: Adj
• Overvoltage Threshold: Adj
• Manual Reset: No
• Watchdog: No
• Supply Voltage (max): 3.96 V
• Supply Voltage (min): 2.8 V
• Supply Current (typ): 40000 uA
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: 85 C
• Package / Case: TQFP-100
• Applications: General Purpose
• Voltage - Input: -0.3 V ~ 5.9 V
• Voltage - Supply: 2.8 V ~ 3.96 V
• Current - Supply: 40mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lattice Semiconductor
Figure 1-16. TrimCell Driving a Typical DC-DC Converter
Figure 1-16 shows the resistor network between the TrimCell #N in the ispPAC-POWR1220AT8 and the DC-DC
converter. The values of these resistors depend on the type of DC-DC converter used and its operating voltage
range. The method to calculate the values of the resistors R1, R2, and R3 are described in a separate application
note.
Voltage Profile Control
The Margin / Trim Block of ispPAC-POWR1220AT8 consists of eight TrimCells. Because all eight TrimCells in the
Margin / Trim Block are controlled by two common voltage profile control signals, they all operate at the same volt-
age profile. These common voltage profile control signals are derived from a Control Multiplexer. One set of voltage
profile control inputs to the control multiplexer is from a pair of device pins: VPS0, VPS1. The second set of voltage
profile control inputs is from the PLD: PLD_VPS0, PLD_VPS1. The selection between the two sets of voltage pro-
file control signals is programmable and is stored in the E
TrimCell
#N
DAC
R
3
R
1-26
1
2
CMOS memory.
R
2
V
Trim
ispPAC-POWR1220AT8 Data Sheet
OUT
V
Converter
OUT
DC-DC
V
IN