0.5-5V 25A Single Output 300-1500KHz Int. LDO Integrated PoL Solution IR3447 (Transient Analysis)

Open online SPICE simulator circuit link: IR3447_digital_12Vin_0.5-5Vo_300-1500KHz_25A_singleOut_intLDO_integrated_POL_TR_V1.tsc


Over Current Protection
0: FLOAT 26 A
1: VCC 32.5 A
2: LGND 19.5 A

IR3447 Synchronous Buck Regulator
12V Single Supply

The IR3447 SupIRBuck® is an easy-to-use, fully integrated and highly efficient DC/DC
regulator. The onboard PWM controller and MOSFETs make IR3447 a space-efficient
solution, providing accurate power delivery for low output voltage and high current
applications.

IR3447 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 300 kHz 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 := 25;
{ Target Switching Frequency }
F_sw := 600k;
{ Number of output capacitors with value C_out }
C_out_Nr := 10;
{ Derated (DC & AC) value for a single output capacitor }
C_out := 47u;
{ Target Vout ripple }
Vout_ripple := 12m;
{ Compensation capacitor. Default is 2.2nF }
C8_Cc := 2.2n;
{ I_ripple vs Iout percentage }
L_ripple_percentage := 30;
{ Load step current }
I_step := 7.5;

Transient Analysis - accurate
Transient Analysis - fast
Technical Assistance
Product info: IR3447M


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