Vishay

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Page 1. Vishay Siliconix. Si2343CDS. Document Number: 65474. S09-2270-Rev . A, 02-Nov-09 www.vishay.com. 1. P-Channel 30-V (D-S) MOSFET. VOUT = 2.5V/2A. CIN. COUT. RFB1. RFB2. L1. D1. Q1. 10 F. 100 F. 10 H. 1k. 2.15k. Si2343 . LM3475. VIN. EN. GND. PGATE. FB. 1. 2. 3. 4. 5. CFF. 1 nF. RFB2. L1. D1. Q1. 10 F. 100 F. 10 H. 1k. 2.15k. Si2343 . LM3475. VIN. EN. GND. PGATE. FB. 1. 2. 3. 4. 5. CFF. 1 nF. VIN = 5V. Users Guide. SNVA115A May 2 RDS(on) additional power loss across the. FET, i.e. = ((VREF (1 + R1/R2) IOUT RDS(on)) IOUT)/(VIN IIN). In this example, the Si2343 -30-V PFET. Recommended components include FDN360P or SI2343 for Q3 and MMBT3904 for Q2. The turnon delay for Q3 is implemented by C25 and R9. R10 is used to