ZHCSIJ1E June 1999 – July 2018 LM2574 , LM2574HV
PRODUCTION DATA.
Select the correct Inductor value selection guide from Figure 23, Figure 24, Figure 25, or Figure 26 (output voltages of 3.3 V, 5 V, 12 V, or 15 V respectively).
From the inductor value selection guide, identify the inductance region intersected by VIN(Max) and ILOAD(Max). The inductance area intersected by the 15-V line and 0.4-A line is 330.
Select an appropriate inductor from Table 3. Part numbers are listed for three inductor manufacturers. The inductor chosen must be rated for operation at the LM2574 switching frequency (52 kHz) and for a current rating of 1.5 × ILOAD. For additional inductor information, see Inductor Selection. The required inductor value is 330 μH. From Table 3, choose Pulse Engineering PE-52627, Renco RL-1284-330, or NPI NP5920/5921.
| INDUCTOR VALUE | PULSE ENG. | RENCO | NPI |
|---|---|---|---|
| 68 μH | * | RL-1284-68-43 | NP5915 |
| 100 μH | * | RL-1284-100-43 | NP5916 |
| 150 μH | 52625 | RL-1284-150-43 | NP5917 |
| 220 μH | 52626 | RL-1284-220-43 | NP5918/5919 |
| 330 μH | 52627 | RL-1284-330-43 | NP5920/5921 |
| 470 μH | 52628 | RL-1284-470-43 | NP5922 |
| 680 μH | 52629 | RL-1283-680-43 | NP5923 |
| 1000 μH | 52631 | RL-1283-1000-43 | * |
| 1500 μH | * | RL-1283-1500-43 | * |
| 2200 μH | * | RL-1283-2200-43 | * |