0.6-5V 25A Single Output 300-1500KHz Int. LDO Integrated PoL Solution IR3826 (Transient Analysis)

Open online SPICE simulator circuit link: IR3826_analog_12Vin_0.6-5Vo_300-1500KHz_23A_singleOut_intLDO_integrated_POL_TR_V1.TSC

Over Current Protection
0: FLOAT 25.7A
1: VCC 29A
2: LGND 21.4A




IR3826 Synchronous Buck Regulator
12V Single Supply

The IR3826 OptiMOS™ IPOL is a 23A easy-to-use, fully integrated and highly efficient
synchronous buck regulator intended for Point-Of-Load (POL) applications.

The IR3826 features programmable switching frequency from 300kHz to 1.5MHz,
three selectable soft-start time options, and smooth synchronization to an external
clock. The IR3826 uses voltage mode control employing a proprietary PWM
modulator, allowing high control bandwidth and fast loop response with less output

The other important functions include thermally compensated over current
protection, output over voltage protection and thermal shut-down, etc. The IR3826
is offered in a small 6mm x 5mm PQFN package with excellent thermal performance.

Switching frequency limits are adjusted based on V_in in the Design Tool.
** 8V <= Vin <= 17V, switching frequency from 300kHz to 1500kHz allowed.
** Vin < 8V, switching frequency from 700kHz to 1500kHz allowed.

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 := 23;
{Min Fsw (V_in>=8V is 300kHz; Vin<8V is 700kHz). Design Tool adjusts Fsw accordingly.
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 := 38u;
{Target Vout ripple}
Vout_ripple := 12m;
{Compensation capacitor. Default is 2.2nF}
C10B_Cc := 2.2n;
{I_ripple vs Iout percentage}
L_ripple_percentage := 35;
{Load step current}
I_step := 7;

Evaluation board: EVAL_3826-23A
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Product info: IR3826M
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