Texas Instruments SLVP089 instruction

Test Results

Figure 1–6. Power Switch Turn-On and Delay from Q2 Off

VCC = 12 V

IO = 1.5 A

Q1 DRAIN

5 V/DIV

1

Q2 GATE

5 V/DIV

2

20 ns/Div

Figure 1–7. Power Switch Turn-Off and Delay to Q2 On

VCC = 12 V

IO = 1.5 A

Q1 Drain

5 V/Div

1

Q2 Gate

5 V/Div

2

20 ns/Div

1-8

Image 16

Texas Instruments SLVP089 manual Power Switch Turn-On and Delay from Q2 Off

Contents

User’s Guide 07/98 Literature Number SLVU001A July Important Notice Read This First About This Manual Trademarks Contents Figures Tables Hardware Topic Introduction Typical Synchronous Buck Converter Schematic Schematic Diagram Power Supply Input/Output Connections Board Layout Shows the SLVP089 board layout Bill of Materials Bill of Materials Test Results Load Regulation and Ripple, 3.3-V 9-V Input Power Switch Turn-On and Delay from Q2 Off Inductor and Output Ripple Page Design Procedure Introduction Operating Specifications Operating Specifications Design Procedures Duty Cycle Estimate + 3 W Controller Functions + DD V O Compensation Network Bode Plot