IR3503MTRPBF International Rectifier, IR3503MTRPBF Datasheet - Page 24

• Manufacturer Part Number: IR3503MTRPBF
• Description: IC CTRL XPHASE VR11.0/1 32-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3503MTRPBF

• Applications: Processor
• Current - Supply: 8mA
• Voltage - Supply: 4.75 V ~ 7.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: *
• Package: 32-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 250kHz to 1.5MHz
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: IR3503MTRPBFTR

During dynamic VID down, OVP may be triggered when output voltage can not follow VDAC voltage change at light
load with large output capacitance. Therefore, over-voltage threshold is raised to 1.73V from VDAC+130mV
whenever dynamic VID is detected and the difference between output voltage and VDAC is more than 50mV, as
shown in Figure 16. The over-voltage threshold is changed back to VDAC+130mV if the difference is smaller than
50mV.
(PHASE IC)
(PHASE IC)
Page 24 of 39
OUTPUT
VOLTAGE
IIN
(ISHARE)
FAULT
LATCH
ERROR
AMPLIFIER
OUTPUT
(EAOUT)
GATEH
GATEL
(VO)
VCCL-800 mV
VDAC
OVP
THRESHOLD
Figure 15: Over voltage protection during normal operation
NORMAL OPERATION
130mV
OVP CONDITION
February 12, 2010
IR3503
AFTER
OVP