0.6-5V 35A Single Output 300-1500KHz Int. LDO Integrated PoL Solution IR3846 (AC Analysis)

Open online SPICE simulator circuit link: IR3846_digital_12Vin_0.6-5Vo_300-1500KHz_35A_singleOut_intLDO_integrated_POL_AC_V1.tsc


Over Current Protection
0: FLOAT 35 A
1: VCC 44.4 A
2: PGND 26.88 A

IR3846 Synchronous Buck Regulator
12V Single Supply

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

The IR3846 SupIRBuck® is an easy-to-use, fully integrated and highly efficient DC/DC regulator.
The onboard PWM controller and MOSFETs make IR3846 a space-efficient solution,
providing accurate power delivery for low output voltage and high current applications.

IR3846 is a versatile regulator which offers programmability of switching frequency and current
limit while operating in wide input and output voltage range.

The switching frequency is programmable from 300kHz to 1.5MHz for an optimum solution.

It also features important protection functions, such as Over Voltage Protection (OVP),
Pre-Bias startup, hiccup current limit and thermal shutdown to give required system level
security in the event of fault conditions.

{ Please double click here to enter design criteria }

{ Input voltage }
V_in := 12;
{ Target output voltage }
V_out := 1.2;
{ Maximum output current }
I_out := 35;
{ Target Switching Frequency }
F_sw := 600k;
{ Number of output capacitors with value C_out }
C_out_Nr := 6;
{ Derated (DC & AC) value for a single output capacitor }
C_out := 100u;
{ Target Vout ripple }
Vout_ripple := 12m;
{ Compensation capacitor. Default is 2.2nF }
C13_Cc := 2.2n;
{ I_ripple vs Iout percentage }
L_ripple_percentage := 35;
{ Load step current }
I_step := 10.5;

AC Transfer Characteristic
Other circuits

Product info: IR3846M
Evaluation board: IRDC3846
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