0.5-5V 40A Single Output 600KHz Int. LDO Integrated PoL Solution IR3846A using Constant On Time - COT (Transient, Efficiency, AC Analysis)

Open online SPICE simulator circuit link: IR3846A_analog_12Vin_0.5-5.0Vo_600KHz_40A_singleOut_intLDO_integrated_POL_FULL.TSC

0.5-5V 40A Single Output 600KHz Int. LDO Integrated PoL Solution IR3846A
using Constant On Time - COT
(Transient, Efficiency, AC Analysis)

C53_64=134.7u
NrCout=3
Cout_MLCC=44.9u
R_load1=147.06m

The IR3846A is an easy-to-use, fully integrated DC-DC Buck regulator. The onboard
PWM controller and OptiMOS™ FETs with integrated bootstrap diode make IR3846A
a small footprint solution, providing high-efficiency power delivery. Furthermore, it uses
a fast Constant On-Time (COT) control scheme, which simplifies design efforts and
provides fast control response.

The IR3846A has an internal low dropout voltage regulator, allowing operation with a
single supply. It can also operate with an external bias supply, extending the operating
input voltage (PVIN) range. The IR3846A offers a switching frequency of 600 kHz, two
selectable current limits, soft start time of 1 ms, and Forced Continuous Conduction
Mode (FCCM).

It also features important protection functions, such as pre-bias start-up, thermally
compensated current limits, over voltage and under voltage protection, and thermal
shutdown to give required system level security in the event of fault conditions.