XRP7665EVB Exar Corporation, XRP7665EVB Datasheet
XRP7665EVB
Specifications of XRP7665EVB
Related parts for XRP7665EVB
XRP7665EVB Summary of contents
Page 1
... The XRP7665 is a pin and function compatible device to MP1484 and a 3A pin to pin upgrade to XRP7664. The XRP7665 is offered in a RoHS compliant, “green”/halogen free 8-pin exposed pad SOIC package. TYPICAL APPLICATION DIAGRAM Exar Corporation 48720 Kato Road, Fremont CA 94538, USA ...
Page 2
... CS Oscillator Frequency F OSC1 Short Circuit Oscillator Frequency F OSC2 Maximum Duty Cycle D MAX Minimum Duty Cycle D MIN EN Threshold V ENH EN Threshold V ENL UVLO Threshold UVLO Hysteresis Soft-start Current Soft-start Time (Note 1) Thermal Shutdown (Note 1) © 2011 Exar Corporation OPERATING RATINGS Input Voltage V Ambient Operating Temperature ................ -40°C to 85°C Maximum Output Current .................................... 3A min Thermal Resistance θ ...
Page 3
... Parameter Thermal Shutdown Hysteresis (Note 1) Feedback Bias Current Note 1: Guaranteed by design. Note 2: R =(V -V )/(I -I DSON SW1 SW2 SW1 SW2 BLOCK DIAGRAM PIN ASSIGNMENT Fig. 3: XRP7665 Pin Assignment (SOIC-8 Exposed Pad) © 2011 Exar Corporation Min. Typ. Max. Units 20 °C 0.1 µ ...
Page 4
... GND COMP ORDERING INFORMATION Temperature Part Number Range XRP7665IDBTR-F -40°C≤T ≤+85°C A XRP7665 Evaluation Board XRP7665EVB “YY” = Year – “WW” = Work Week – “X” = Lot Number; when applicable. © 2011 Exar Corporation Bootstrap pin. Connect a 0.01µF or greater bootstrap capacitor between the BS pin and the SW pin. ...
Page 5
... TYPICAL PERFORMANCE CHARACTERISTICS All data taken 12V, V =3.3V OUT Information section of this datasheet. Fig. 4: Efficiency versus output current Fig versus case temperature DSONL Fig. 8: Quiescent current versus case temperature © 2011 Exar Corporation 25°C, unless otherwise specified - Schematic and BOM from Application ...
Page 6
... Fig. 10: Output voltage ripple, I Fig. 12: Enable turn on CC mode, I OUT Fig. 14: Short-circuit protection, I © 2011 Exar Corporation =3A OUT =3A =3A OUT 6/ Fig. 11: Load transient (I =1A to 2A) OUT Fig. 13: Enable turn off CC mode. I =3A OUT Fig. 15: Short-circuit recovery, I OUT =3A Rev. 1.0.0 ...
Page 7
... FB OVER CURRENT PROTECTION OCP The OCP protects against accidental increase in load current that can cause the regulator to fail. The current of internal switch M1 is monitored. If this current reaches 5.6A then M1 is turned off until next switching cycle. © 2011 Exar Corporation ...
Page 8
... When calculating capacitance, usually requirement is current load-step transient. If the unloading transient (i.e., transitions from a high to a low current) is met, then usually the loading transient (when load transitions from a low to a high current) is met as well. Therefore calculate the C © 2011 Exar Corporation ...
Page 9
... Table 3. Optional Schottky diode EXTERNAL BOOTSTRAP DIODE A low-cost diode, such recommended for higher efficiency when the input voltage the output 3.3V. Circuit configuration is shown in figures 16 and 17. The external bootstrap diode is also recommended where duty cycle (V larger than 65%. © 2011 Exar Corporation ...
Page 10
... ESR is inconsequential if ceramic C simplifies the compensation. The RC and CC, which are placed between the output of XRP7665’s Error Amplifier constitute a zero. The frequency of this compensating zero is given by TYPICAL APPLICATIONS Fig. 18: XRP7665 Typical Application Diagram - 12V to 3.3V Conversion © 2011 Exar Corporation ...
Page 11
... PACKAGE SPECIFICATION 8-P SOIC XPOSED AD Unit: mm (inch) Eject hole, oriented hole and mold mark are optional. © 2011 Exar Corporation 11/ Rev. 1.0.0 ...
Page 12
... While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...