LMZ14203TZX-ADJ National Semiconductor Corporation, LMZ14203TZX-ADJ Datasheet
LMZ14203TZX-ADJ
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LMZ14203TZX-ADJ Summary of contents
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... Point of load conversions from 12V and 24V input rail ■ Time critical projects ■ Space constrained / high thermal requirement applications ■ Negative output voltage applications (See AN-2027) © 2010 National Semiconductor Corporation LMZ14203 Performance Benefits ■ Operates at high ambient temperature with no thermal derating ■ ...
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... Simplified Application Schematic Connection Diagram Ordering Information Order Number LMZ14203TZ-ADJ LMZ14203TZX-ADJ LMZ14203TZE-ADJ Pin Descriptions Pin Name Description 1 VIN Supply input — Nominal operating range 42V . A small amount of internal capacitance is contained within the package assembly. Additional external input capacitance is required between this pin and exposed pad. ...
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Pin Name Description 7 VOUT Output Voltage — Output from the internal inductor. Connect the output capacitor between this pin and exposed pad Exposed Pad — Internally connected to pin 4. Used to dissipate heat from the package ...
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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN, RON to GND EN, FB GND Junction Temperature Storage Temperature Range Electrical Characteristics junction temperature (T ...
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Symbol Parameter η Efficiency η Efficiency Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For guaranteed specifications and ...
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Efficiency 24V Input @ 25°C Efficiency 36V Input @ 25°C Efficiency 6V Input @ 85°C www.national.com Dissipation 24V Input @ 25°C 30107026 Dissipation 36V Input @ 25°C 30107029 Dissipation 6V input @ 85°C 30107033 6 30107027 30107030 30107034 ...
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Efficiency 8V input 85°C 30107040 Efficiency 12V input@ 85°C 30107042 Efficiency 24V input @ 85°C 30107044 Dissipation 8V input 85°C Dissipation 12V input @ 85°C Dissipation 24V input @ 85°C 7 30107041 30107043 30107045 www.national.com ...
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Efficiency 36V input @ 85°C Line and Load Regulation @ 25°C Transient Response 24V 3.3V 0. Step IN O www.national.com Dissipation 36V input @ 85°C 30107046 24V IN 30107048 Thermal Derating V 30107006 8 30107047 Output Ripple 3.3V ...
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Application Block Diagram COT Control Circuit Overview Constant On Time control is based on a comparator and an on-time one shot, with the output voltage feedback compared with an internal 0.8V reference. If the feedback voltage is be- low the ...
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For V = 0.8V the FB pin can be connected to the output di- O rectly so long as an output preload resistor remains that draws more than 20uA. Converter operation requires this minimum load to create a small inductor ...
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Additionally note, the minimum off-time of 260 ns limits the maximum duty ratio. Larger R (lower F ON lected in any application requiring large duty ratio. Discontinuous Conduction and Continuous Conduction Modes At light load the regulator will operate in ...
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Good layout can be imple- mented by following a few simple design rules. 1. Minimize area of switched current loops. From an EMI reduction standpoint imperative to minimize the high di/dt paths during ...
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PRE-BIASED STARTUP The LMZ14203 will properly start up into a pre-biased output. This startup situation is common in multiple rail logic applica- tions where current paths may exist between different power rails during the startup sequence. The following scope cap- ...
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Evaluation Board Schematic Diagram Ref Des Description U1 SIMPLE SWITCHER ® µF, 50V, X7R in1 C 10 µF, 50V, X7R in2 C 1 µF, 50V, X7R O1 C 100 µF, 6.3V, X7R O2 R 3.32 kΩ FBT R ...
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15 30107016 30107017 www.national.com ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 7-Lead TZA Package NS Package Number TZA07A 16 ...
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Notes 17 www.national.com ...
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