TD1509 Techcode Semiconductor, TD1509 Datasheet
TD1509
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TD1509 Summary of contents
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... PWM Buck DC/DC Converter General Description The TD1509 easy to use adjustable step-down (buck) switch-mode voltage regulator. The device is available in an adjustable output version capable of driving a 2A load with excellent line and load regulation. Requiring a minimum components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator ...
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... P: SOP8 D: DIP8 December, 20, 2005. Pin Descriptions Pin 1 2 5~8 Gnd TD1509 X 2 Datasheet TD1509 Name Description Vin Input supply voltage Output Switching output Ground Feedback Output voltage feedback ON/OFF ON/OFF shutdown Active is “Low” or floating Output Versions R: Adjustable Output 3: Fixed Output 3.3V ...
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... PWM Buck DC/DC Converter Functional Block Diagram Figure 2. Functional Block Diagram of TD1509 Typical Application www.DataSheet4U.com December, 20, 2005. Techcode Semiconductor Limited 3 Datasheet TD1509 ...
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... PWM Buck DC/DC Converter www.DataSheet4U.com December, 20, 2005. Figure 3. Typical Application of TD1509 Note:In PCB layout. Reserved an area for CFF 4 Datasheet TD1509 Techcode Semiconductor Limited ...
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... Conditions V =1. =12V force driver off FB ON/OFF=5V, V =36V IN 127 I =2A OUT Peak Current (V =0V) FB Output=0V (V =12V) FB Output=-1V (V =32V Datasheet TD1509 Unit ºC ºC ºC V º º Uni Min. Typ. Max 50/100 100 ...
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... IN OUT LOAD ≤45V, 0.2A≤I 4.75V≤V IN LOAD 3.168/3 .135 ≤2A V =12V, I =2A IN LOAD 7V ≤ V ≤ 45V, 0.2A ≤ I ≤ IN LOAD 4.800/4 .750 2A V =12V, I =2A IN LOAD Datasheet TD1509 1.3 0 1.267/ 1.23 V 1.280 89 % 3.432/ 3.3 V 3.465 76 % 5.200/ 5 ...
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... PWM Buck DC/DC Converter Typical Performance Characteristics Figure 4. Output Voltage vs. Temperature www.DataSheet4U.com Figure 6. Output Saturation Characteristics December, 20, 2005. Figure 5. Switching Frequency vs. Temperature Figure 7. Quiescent Current vs. Temperature Techcode Semiconductor Limited 7 Datasheet TD1509 ...
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... PWM Buck DC/DC Converter Figure 8. ON/OFF Pin Voltage www.DataSheet4U.com Figure 10. Output Saturation Characteristics December, 20, 2005. Figure 9. ON/OFF Pin Sink Current Techcode Semiconductor Limited 8 Datasheet TD1509 ...
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... Table 1. TD1509 Series Buck Regulator Design Procedure For 3.3V www.DataSheet4U.com Input Voltage Inductor (L1 18V 8V ~ 45V Table 2. TD1509 Series Buck Regulator Design Procedure For 5V December, 20, 2005. (Adjustable Output Voltage Version) Through Hole Electrolytic 47uh 470uf/25V 68uh 560uf/25V Through Hole Electrolytic ...
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... PWM Buck DC/DC Converter Figure 12. Typical Application of TD1509 For ADJ Vout 3. 12V Table 3. Vout VS. R1, R2, Cf Select Table www.DataSheet4U.com Output Voltage Voltage 3. 18V 6V ~36V 18V 8V ~36V 9V 12V ~18V 12V ~36V 12V 15V ~ 18V 15V ~36V Table 4. Typical Application Buck Regulator Design Procedure December, 20, 2005 ...
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... ON condition. Thermal Considerations The TD1509 is available in SOP8/DIP8 package. The SOP8/DIP8 package needs a heat sink under most conditions. The size of the heat sink depends on the input voltage, the output voltage, the load current and the ambient temperature ...
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... If using this technique recommended that the larger capacitor be a tantalum or electrolytic type. All ceramic capacitors should be places close to the TD1509. Output Capacitor The output capacitor is required to maintain the DC output voltage. Low ESR capacitors are preferred to keep the output voltage ripple December, 20, 2005 ...
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... Current flows in the first loop when the high side switch is on. The second loop starts from the inductor, to the output capacitors and load, to the GND pin of the TD1509, and to the VOUT pins of the TD1509. Current flows in the second loop when the low side diode is on. ...
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... PWM Buck DC/DC Converter Package Information SOP8 Package Outline Dimensions www.DataSheet4U.com December, 20, 2005. Techcode Semiconductor Limited 14 Datasheet TD1509 ...
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... PWM Buck DC/DC Converter Package Information DIP8 Package Outline Dimensions www.DataSheet4U.com December, 20, 2005. Techcode Semiconductor Limited 15 Datasheet TD1509 ...
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... PWM Buck DC/DC Converter www.DataSheet4U.com December, 20, 2005. Design Notes 16 Datasheet TD1509 Techcode Semiconductor Limited ...