IR3513ZMTRPBF International Rectifier, IR3513ZMTRPBF Datasheet - Page 19

• Manufacturer Part Number: IR3513ZMTRPBF
• Description: IC CTRL XPHASE3 POL 32-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3513ZMTRPBF

• Applications: Processor
• Current - Supply: 3mA
• Voltage - Supply: 8 V ~ 16 V
• Operating Temperature: 0°C ~ 125°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

Linear Regulator Output (VCCL)
The IR3513 has a built-in linear regulator controller, and only an external NPN transistor is needed to create a linear
regulator. The output voltage can be programmed between 4.75V and 7V by the resistor divider at VCCLFB pin.
The regulator output powers the gate drivers of the phase ICs and circuits in the control IC, and the voltage is
usually programmed to optimize the converter efficiency. The linear regulator can be compensated by a 4.7uF
capacitor at the VCCL pin. As with any linear regulator, due to stability reasons, there is an upper limit to the
maximum capacitor value that can be used at this pin and it is a function of the number of phases used in the
multiphase architecture and their switching frequency. Figure 10 shows the stability plots for the linear regulator with
5 phases switching at 750 kHz.
VRRDY
ENABLE
SS/DEL
IOUT
VOUT
EA
Page 19
OCP THRESHOLD
3.12V
3.08V
3.2V
1.4V
Figure 9 - Constant over-current control waveforms during and after soft start
Figure 10 - VCCL regulator stability with 5 phases and PHSOUT equals 750 kHz
START-UP WITH
OUTPUT SHORTED
REPLACEMENT PRODUCT – IR3513ZMTRPBF
NOT RECOMMENDED FOR NEW DESIGNS
HICCUP OVER-CURRENT
PROTECTION (OUTPUT
SHORTED)
NORMAL
START-UP
NORMAL
OPERATION
(OUTPUT
SHORTED)
OCP
DELAY
OVER-CURRENT
PROTECTION
(OUTPUT SHORTED)
NORMAL
START-UP
May 11, 2008
NORMAL
OPERATION
IR3513
POWER-DOWN