LM2853-1.8EVAL National Semiconductor, LM2853-1.8EVAL Datasheet
LM2853-1.8EVAL
Specifications of LM2853-1.8EVAL
Related parts for LM2853-1.8EVAL
LM2853-1.8EVAL Summary of contents
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... The LM2853 synchronous SIMPLE SWITCHER lator is a 550 kHz step-down switching voltage regulator capable of driving load with excellent line and load regulation. The LM2853 accepts an input voltage between 3.0V and 5.5V and delivers a customizable output voltage that is factory programmable from 0.8V to 3.3V in 100mV increments ...
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... Note: Contact factory for other voltage options. Pin Descriptions Pin # 6,7 8,9 10,11 12,13 14 Exposed Pad www.national.com Package Marking Package Type LM2853-0.8 LM2853-1.0 LM2853-1.2 LM2853-1.5 TSSOP-14 exposed pad LM2853-1.8 LM2853-2.5 LM2853-3.0 LM2853-3.3 Name AVIN Input Voltage for Control Circuitry. EN Enable. SGND Low noise ground. SS Soft-Start Pin ...
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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. AVIN, PVIN, EN, SNS, SW, SS ESD Susceptibility (Note 2) Power Dissipation Storage Temperature Range Maximum Junction Temp. Electrical Characteristics type apply over the full Junction Temperature Range (−40˚C to 125˚C). Minimum and Maximum limits are guaranteed through test, design or statistical correlation ...
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... Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. Test Method is per JESD22-AI14. Note 3: V measured in a non-switching, closed-loop configuration at the SNS pin. OUT Note 4: The enable pin is internally pulled up, so the LM2853 is automatically enabled unless an external enable voltage is applied. www.national.com Specifications with standard typeface are for T Conditions ...
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Typical Performance Characteristics = AVIN = PVIN = 5V 25˚C. J Efficiency vs. I LOAD V = 1.8V OUT Efficiency vs. I LOAD V = 2.5V OUT Efficiency vs. I LOAD V = 3.3V OUT Unless otherwise specified, ...
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Typical Performance Characteristics = AVIN = PVIN = 5V 25˚C. (Continued vs. V and Temperature Q IN www.national.com Unless otherwise specified, the following conditions apply vs 20201510 6 IN and Temperature IN ...
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... Block Diagram Applications Information The LM2853 is a DC-DC buck regulator belonging to Na- tional Semiconductor’s synchronous SIMPLE SWITCHER family. Integration of the PWM controller, power switches and compensation network greatly reduces the component count required to implement a switching power supply. A typical application requires only four components: an input capacitor, a soft-start capacitor, an output filter capacitor and an output filter inductor ...
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... Applications Information Since it is undesirable for the power supply to start up in current limit, a soft-start capacitor must be chosen to force the LM2853 to start more controlled fashion based on the charging of the soft-start capacitance. In this example, suppose start time is desired. Three time constants are required for charging the soft-start capacitor to 95% of the final reference voltage this case ms. The DAC resistor 450 kΩ ...
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... The I an inductor used in an application should be greater than the maximum expected inductor current to avoid saturation. Be- low is a table of inductors that are suitable in LM2853 applications. TABLE 2. Recommended Inductors Part Number ...
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... Under certain fault conditions, switching is disabled in order to protect the switching de- vices. One side effect of the protection circuitry may be observed when power to the LM2853 is applied with no or light load on the output. The output will regulate to the rated voltage, but no switching may be observed. As soon as the output is loaded, the LM2853 will begin normal switching operation ...
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... LM2853 Example Circuit Schematic ID Part Number U LM2853MH-3 GRM31CR60J476ME19 IN C GRM21BR71C105KA01 BYP C VJ0805Y222KXXA SS L DO3316P-682 O C 594D127X06R3C2T O ID Part Number U LM2853MH-1 GRM31CR60J476ME19 IN C GRM21BR71C105KA01 BYP CSS VJ0805Y222KXXA L DO3316P-472 O C NOSD157M006R0070 O (Continued) Bill of Materials for 5V to 3.3V Conversion Type Size 3A Buck ETSSOP-14 Capacitor ...
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