Electronic Components Datasheet Search |
|
ADP3310AR-33 Datasheet(PDF) 7 Page - Analog Devices |
|
ADP3310AR-33 Datasheet(HTML) 7 Page - Analog Devices |
7 / 8 page ADP3310 –7– REV. A ADP3310-3.3 IN OUT GATE MI IRF7404 + OSCON 220 F C1 1 F VIN = 5V TO 15V C2 10nF IRF7204 L* 68µH N-CH IRF7403 C3 1nF D1 10BQ040 C4 RSENSE** 0.1 R1 30.1k 1% 2N3906 Q1 R2 124k 1% RC 1k CC 22nF CT 470pF R3 274k 2N3906 Q2 C5 10 F 3.3V/1A VIN INT VCC P-DRIVE ITH CT SENSE+ SENSE– N-DRIVE FB S-GND P-GND ADP1148 SD CIN OSCON 220 F GND ** COILTRONICS CTX-68-4 ** KRL SL-1-C1-ORO5OL BAT54 IS EN Figure 15. High Current Post Regulator with SOIC PMOS Current Limit Threshold Voltage = 0.05 V Safety Factor = 1.5 IO = Output Current RS is not needed in circuits that do not require current limiting. In that case, the IS pin must be tied to the input pin. The simplest and cheapest sense resistor for high current applica- tions, (i.e., Figure 1) is a PCB trace. The temperature depen- dence of the copper trace and the thickness tolerances of the trace must be taken into account in the design. The resistivity of copper has a positive temperature coefficient of +0.39%/ °C. Copper’s Tempco in conjunction with the proportional-to- absolute temperature (PTAT) current limit voltage can provide an accurate current limit. Table II provides the resistance value for PCB copper traces. Alternately, an appropriate sense resistor such as surface mount sense resistors available from KRL can be used. PCB-Layout Issues For optimum voltage regulation, place the load as close as pos- sible to the device’s VOUT and GND pins. It is recommended to use dedicated PCB traces to connect the MOSFET’s drain to the positive terminal and GND to the negative terminal of the load to avoid voltage drops along the high current carrying PCB traces. Application Circuits Typical 3 A LDO Circuit The ADP3310 and a power MOSFET can be used to power the new generation of CPUs and microprocessors from the standard +5 V supply at a very low cost (Figure 14). This circuit provides low dropout, fast switching and high switching load current from 0 A to 3 A. Due to the high switching load current, capaci- tors with high ripple current carrying capability, such as OSCON or special tantalum capacitors from Sprague (593D), are recom- mended for the output. Table II. Printed Circuit Copper Resistance Conductor Conductor Width Resistance Thickness In m Ω/In 1/2 oz/ft2 0.025 39.3 (18 µm) 0.050 19.7 0.100 9.83 0.200 4.91 0.500 1.97 1 oz/ft2 0.025 19.7 (35 µm) 0.050 9.83 0.100 4.91 0.200 2.46 0.500 0.98 2 oz/ft 2 0.025 9.83 (70 µm) 0.050 4.91 0.100 2.46 0.200 1.23 0.500 0.49 3 oz/ft2 0.025 6.5 (106 µm) 0.050 3.25 0.100 1.63 0.200 0.81 0.500 0.325 M1 NDP6020P 10 F 4.5V TO 5.5V 10 F IS GND EN VIN VOUT ADP3310-3.3 + R2 0.011 GATE 1k 220 F OSCON + 3 220 F OSCON 3.3V Figure 14. Typical 3 A Low Dropout Regulator Circuit 50mV/div 2V/div 5 µs/div |
Similar Part No. - ADP3310AR-33 |
|
Similar Description - ADP3310AR-33 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |