4 Revision History

Changes from B Revision (March 2013) to C Revision

• Added ESD Ratings table, Thermal Information table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section.Go
• Deleted Ordering Information table; see POA at the end of the data sheetGo
• Changed document title and description from "Step-Down" to "Buck Converter"Go
• Changed from "Greater Than" to "Up to"Go
• Changed Features and Applications bullets editorially Go
• Changed description to automotive applications Go
• Deleted duplicated information Go
• Added 2.25-MHz fixed frequency and a 1.2-V fixed output voltageGo
• Added PWM mode descriptionGo
• Added Free-air temperature range and reworded device package description. Go
• Changed figure for V_O = 1.2 V curves Go
• Updated pinout image to new formatGo
• Deleted table note 3 about human body model and machine modelGo
• Deleted table row for adjustable voltageGo
• Added table rows for inductance and output capacitanceGo
• Added PWM Mode Go
• Deleted in fixed output voltage versions from table noteGo
• Deleted Dissipation Ratings sectionGo
• Moved Figures 2, 6 through 9, and 11 through 13 to Application CurvesGo
• Changed Figures 6 through 9 and 11 through 13 for 1.2 VGo
• Deleted Figures 1, 3 through 5, 10, 14, and 15 Go
• Deleted Mode transition row from table and corresponding figures 14 and 15Go
• Moved Soft Start, Power Save Mode, and Short-Circuit Protection sections to Device Functional Modes sectionGo

Changes from A Revision (March 2012) to B Revision

• Changed C3B to C4B in FeaturesGo
• Changed bullet point in Features list from "Adjustable Output Voltage from 0.6 V to V_in" to "1.2 V Fixed Output Voltage"Go
• Added Output column for fixed voltage to Ordering Information table.Go
• Changed C3B to C4BGo
• Changed "T_a = 115°C" to "T_a = –40°C°C to 115°C" in all instances in the electrical characteristics tableGo
• Added "T_a = 25°C" to following parameters listed in the electrical characteristics table: "Shutdown current," "Low level input voltage," "Feedback voltage," and "Leakage current into SW pin"Go
• Added 2 V ≤ V_IN ≤ 6 V to V_IL test conditions.Go
• Added V_IN = V_GS = 3.6 V to I_LIMF test conditions.Go
• Changed min and typ values for V_REF from 0.594 to 594 and 0.606 to 606, respectively. Go
• Added PWM operation, 2 V ≤ V_IN ≤ 6 V, in fixed output voltage versions V_FB = V_OUT, See (2) to the V_FB test conditions.Go
• Added V_IN = 3.6 V, V_IN = V_OUT = V_SW, EN = GND,(3), to the I_lkg test conditions.Go
• Changed the junction temperature in the thermal shutdown detail from "TBD" to "150°C"Go
• Added missing parentheses to equation.Go