ZHCSKV1A February 2020 – July 2020 LM76005
PRODUCTION DATA
The LM76005 only requires a few external components to convert from a wide range of supply voltages to output voltage, as shown in Figure 8-1:
Figure 8-1 LM76005 Basic SchematicThe LM76005 also integrates a full list of features to aid system design requirements, such as the following:
Each system can select the features needed in a specific application. A comprehensive schematic with all features utilized is shown in Figure 8-2:
Figure 8-2 LM76005 Comprehensive SchematicThe external components must fulfill the requirements of the application, but also the stability criteria of the device control loop. The LM76005 is optimized to work within a range of external components. Inductance and capacitance of the LC output filter each create poles that have to be considered in the control of the converter. For VOUT = 1 V, 3.3 V, 5V, the recommended output capacitors have been generated assuming typical derating for 16-V, X7R, automotive grade capacitors. For VOUT = 12 V, the recommended output capacitors have been generated assuming typical derating for 25-V, X7R, automotive grade capacitors, and for VOUT = 24 V, the recommended output capacitors have been generated assuming typical derating for 50-V, X7R, automotive grade capacitors. If lower voltage, nonautomotive grade, or lower temperature rated capacitors are used, more capacitors than listed are likely to be needed.Table 8-1 can be used to simplify the output filter component selection.
| fSW (kHz) | VOUT (V) | L (μH) | COUT (μF) | RFBT (k?) | RFBB (k?) |
|---|---|---|---|---|---|
| 200 | 1 | 2.5 | 720 | 100 | OPEN |
| 400 | 1 | 1.2 | 600 | 100 | OPEN |
| 500 | 1 | 1 | 470 | 100 | OPEN |
| 200 | 3.3 | 10 | 300 | 100 | 43.5 |
| 400 | 3.3 | 4.7 | 220 | 100 | 43.5 |
| 500 | 3.3 | 4.7 | 200 | 100 | 43.5 |
| 200 | 5 | 15 | 250 | 100 | 25 |
| 400 | 5 | 6.8 | 180 | 100 | 25 |
| 500 | 5 | 5.2 | 150 | 100 | 25 |
| 200 | 12 | 22 | 200 | 100 | 9.09 |
| 400 | 12 | 10 | 150 | 100 | 9.09 |
| 500 | 12 | 7.2 | 120 | 100 | 9.09 |
| 200 | 24 | 44 | 150 | 100 | 4.37 |
| 400 | 24 | 22 | 100 | 100 | 4.37 |
| 500 | 24 | 15 | 88 | 100 | 4.37 |