5.0V 35A Single Output 1400-1500KHz Int. LDO Integrated PoL Solution IR38064 (AC Analysis)

Open online SPICE simulator circuit link: IR38064_digital_12Vin_5.0Vo_1454KHz_35A_singleOut_intLDO_integrated_POL_AC_V3.TSC


Bode Plot Requirements:
1. Phase Margin (PM) > 50 degrees
2. Crossover Frequency < Switching Frequency / 5 (F_sw/5)
3. Gain Margin (GM) > 10 dB

IR38064 Synchronous Buck Regulator with PMBus Interface
12V Single supply in Digital Mode

The IR38064 PMBus SupIRBuck™ is an easy-to-use, fully integrated and highly efficient
DC/DC regulator with I2C/PMBus interface. The onboard PWM controller and MOSFETs
make IR38064 a space-efficient solution, providing accurate power delivery for low
output voltage and high current applications.

The IR38064 can be comprehensively configured via PMBus and the configuration
stored in internal memory. In addition, PMBus commands allow run-time control, fault
status and telemetry.

The IR38064 can also operate as a standard analog regulator without any programming
and can provide current and temperature telemetry in an analog format.

{ Please double click here to enter design criteria }

{ Input voltage }
V_in := 12;
{ Target output voltage - fixed due to Config file }
V_out := 5;
{ Maximum output current }
I_out := 35;
{ Target Switching Frequency - fixed due to Config file }
F_sw := 1.45M;
{ Derated (DC & AC) value for a single output capacitor }
C_out := 22.91u;
{ Number of output capacitors with value C_out }
C_out_Nr := 7;
{ Target Vout ripple }
Vout_ripple := 50m;
{ Compensation capacitor. Default is 2.2nF }
C8_Cc := 2.2n;
{ I_ripple vs Iout percentage }
L_ripple_percentage := 35;
{ Load step current }
I_step := 10.5;

The registers of the IR38063 are preloaded according to the config text file.
The config text file file was loaded to the Data file property of the IR38063 model.
The values of the registers can be changed or displayed by using the Edit | Edit Properties
(double-click on the component) and click on the Data file property.


Evaluation board: IR38064
Technical Assistance
Other circuits
Product info: IR38064MTRPBF
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AC Transfer Characteristic