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ML4770 Datasheet(PDF) 4 Page - Micro Linear Corporation |
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ML4770 Datasheet(HTML) 4 Page - Micro Linear Corporation |
4 / 8 page ML4770 4 Q1 ON Q2 OFF Q1 OFF Q2 ON IL VL2 IL(MAX) ISET VOUT 0 0 Figure 1. Application Test Circuit Figure 3. Inductor Current and Voltage Waveforms Figure 2. PFM Regulator Block Diagram VL2 5 VOUT 6 + – SHUTDOWN CONTROL 7 SHDN VIN 2 2.57V START-UP 3 GND VL1 1 SYNCHRONOUS RECTIFIER CONTROL BOOST CONTROL SHDN + – + – 8 PWR GND A1 A2 A3 Q1 Q2 Q3 VOUT 4 SENSE COUT R1 R2 IL ISET RSENSE ML4770 IOUT 100µF 100µF VIN 27µH (Sumida CD75) VL1 VIN GND SENSE PWR GND SHDN VL2 VOUT 268k Ω 259k Ω VIN |
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