NCP5211 ON Semiconductor, NCP5211 Datasheet
NCP5211
Available stocks
Related parts for NCP5211
NCP5211 Summary of contents
Page 1
... N−Channel MOSFETs. High current internal gate drivers are capable of driving high gate capacitance of low R better efficiency. The NCP5211 14−pin package to allow the designer added flexibility. The NCP5211 provides overcurrent protection, undervoltage lockout, Soft− ...
Page 2
... Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability second maximum above 183 C. NCP5211 0.1 mF BST GATE(H) ...
Page 3
... V Power supply input for the low side driver GATE(L) Low Side Synchronous FET driver pin. Capable of delivering peak currents of 1 PGND High Current ground for the GATE(H) and GATE(L) pins. NCP5211 Pin Symbol V V MAX MIN −0 ...
Page 4
... OSC Switching Frequency OSC Switching Frequency R = 115 kW OSC R Voltage OSC 2. Guaranteed by design. Not tested in production. NCP5211 (−40 C < T < −40 C < T < 125 C; 4.5 V < 0.1 mF, unless otherwise specified.) (Note 2) COMP Test Conditions − − − − , Measure V ...
Page 5
... FB 1.0 V SGND 100 % DC Comparator 0.8 V UVLO Comparator V START IS+ Comparator 60 mV IS− 5.0 mA LGND NCP5211 < −40 C < T < 125 C; 4.5 V < 0.1 mF, unless otherwise specified.) (Note 3) COMP Test Conditions Reset Dominant PWM Comparator R OSC ART Ramp R OSC S PWM FF Fault Set Dominant ...
Page 6
... If there are no fault conditions and the fault latch is reset, the error amplifier will start charging the COMP pin 2 capacitor after the NCP5211 is powered up. The output of the error amplifier (COMP voltage) will ramp up linearly. The COMP capacitance and the source current of the error amplifier determine the slew rate of COMP voltage ...
Page 7
... Remote Voltage Sensing The NCP5211 has the capability to sense the voltage when the load is located far away from the regulator. The SGND pin is dedicated to the differential remote sensing. The negative remote sense line is connected to SGND pin directly, while the positive remote sense line is usually connected to the top of the feedback voltage divider ...
Page 8
... I OUT The power dissipation for the inductor can be determined from RMS NCP5211 APPLICATIONS INFORMATION Input Capacitor Selection and Considerations The input capacitor is used to reduce the current surges caused by conduction of current of the top pass transistor charging the PWM inductor. ...
Page 9
... Q is the post gate threshold portion of the switch gate−to−source charge plus the gate−to−drain charge. This may be specified in the data sheet or approximated from the gate−charge curve as shown in the Figure 5. Q switch + Q gs2 ) Q gd NCP5211 V GS_TH GS1 ...
Page 10
... FFB The negative remote sense connection is provided by connecting the SGND of the NCP5211 to the negative of the load return. Again, a low value resistor should be connected between SGND and LGND at the regulator to provide feedback in the instance when the remote sense point is not connected ...
Page 11
... Low ESR at the regulator output results in low output voltage ripple. This situation could result in increase noise sensitivity and a potential for loop instability. In applications where the output ripple is not sufficient, the performance of the NCP5211 can be improved by adding a fixed amount external ramp compensation to the V FFB 7, the amount of ramp at the V ...
Page 12
... Figure 9. Additional Application Diagram 5.0 V/8.0 A Converter with Differential Remote Sense 5 GATE( GATE(L) COMP R OSC 0.1 mF NCP5211 51 k 0.1 mF SGND LGND 10 Figure 10. Additional Application Diagram 5.0 V Bias to 3.3 V/8.0 A Converter with NCP5211 0.1 mF BST GATE(H) GATE(L) PGND IS+ IS− V FFB 4. 1 ...
Page 13
... J C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 5.80 6.20 0.228 0.244 R 0.25 0.50 0.010 0.019 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. NCP5211/D _ ...