Datasheet LTC3834 (Analog Devices) - 24
| Manufacturer | Analog Devices |
| Description | 30μA IQ Synchronous Step-Down Controller |
| Pages / Page | 30 / 24 — APPLICATIONS INFORMATION. Figure 9. LTC3834 Recommended Printed Circuit … |
| File Format / Size | PDF / 793 Kb |
| Document Language | English |
APPLICATIONS INFORMATION. Figure 9. LTC3834 Recommended Printed Circuit Layout Diagram. Figure 10. Branch Current Waveforms
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Text Version of Document
LTC3834
APPLICATIONS INFORMATION
high current output loading at lower input voltages, look when the current sensing leads are hooked up backwards. for inductive coupling between CIN, Schottky and the top The output voltage under this improper hookup will still MOSFET components to the sensitive current and voltage be maintained but the advantages of current mode control sensing traces. In addition, investigate common ground will not be realized. Compensation of the voltage loop will path voltage pickup between these components and the be much more sensitive to component selection. This SGND pin of the IC. behavior can be investigated by temporarily shorting out An embarrassing problem, which can be missed in an the current sensing resistor—don’t worry, the regulator otherwise properly working switching regulator, results will still maintain control of the output voltage. V C1 C IN B 1nF CIN M1 L1 VOUT + – M2 D1 COUT TG RUN SW V IN OPTIONAL PGOOD BOOST PHASMD SENSE SENSE PLLIN/MODE DB LTC3834EFE CC CC CLKOUT PLLLPF I TH TRACK/SS V FB SGND PGND BG INTV EXTV 3834 F09
Figure 9. LTC3834 Recommended Printed Circuit Layout Diagram
L1 V SW RSENSE IN VOUT RIN CIN D1 COUT RL1 3834 F10 BOLD LINES INDICATE HIGH SWITCHING CURRENT. KEEP LINES TO A MINIMUM LENGTH.
Figure 10. Branch Current Waveforms
3834fc 24 For more information www.linear.com/LTC3834 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Package Description Typical Application Related Parts
APPLICATIONS INFORMATION
high current output loading at lower input voltages, look when the current sensing leads are hooked up backwards. for inductive coupling between CIN, Schottky and the top The output voltage under this improper hookup will still MOSFET components to the sensitive current and voltage be maintained but the advantages of current mode control sensing traces. In addition, investigate common ground will not be realized. Compensation of the voltage loop will path voltage pickup between these components and the be much more sensitive to component selection. This SGND pin of the IC. behavior can be investigated by temporarily shorting out An embarrassing problem, which can be missed in an the current sensing resistor—don’t worry, the regulator otherwise properly working switching regulator, results will still maintain control of the output voltage. V C1 C IN B 1nF CIN M1 L1 VOUT + – M2 D1 COUT TG RUN SW V IN OPTIONAL PGOOD BOOST PHASMD SENSE SENSE PLLIN/MODE DB LTC3834EFE CC CC CLKOUT PLLLPF I TH TRACK/SS V FB SGND PGND BG INTV EXTV 3834 F09
Figure 9. LTC3834 Recommended Printed Circuit Layout Diagram
L1 V SW RSENSE IN VOUT RIN CIN D1 COUT RL1 3834 F10 BOLD LINES INDICATE HIGH SWITCHING CURRENT. KEEP LINES TO A MINIMUM LENGTH.
Figure 10. Branch Current Waveforms
3834fc 24 For more information www.linear.com/LTC3834 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Package Description Typical Application Related Parts
