PAM2401 EVB User Guide CONFIDENTIAL INFORMATION PAM2401 EV Board User Guide AE Department 1. Revision Information Date Revision Description 2014/05 V1.0 Initial release Comment DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M Pow er Analog Microelectronics, Inc. Rev. V1.0 May.2014 1 PAM2401 EVB User Guide CONFIDENTIAL INFORMATION 2. PAM2401 General Description The PAM2401 is a high efficiency, current mode, fixed frequency, step-up DC/DC converter with true output disconnect and inrush current limiting. The device includes one 0.10Ω N-channel MOSFET switch and one 0.15Ω P-channel synchronous rectifier. This product has the ability to simply program the output voltage from 2.5V to 5.0V.The switching frequency is 1.0MHz programmable current limit set by an external resistor from 1.0A to 3.0A with internal soft-start. When loading became light, the converter will automatically enter into PSM to improve the efficiency. Quiescent current is only 150uA during Pulse Skip Mode operation, maximizing battery life in portable applications. Other features include:<1uA shutdown, anti-ringing control, Hiccup mode at short protection, over voltage protection and over temperature protection. The P AM2401 is available in MSOP-8 and U-DFN3030-12 packages 3． Key Features z z z z z z z z z Up to 95% Efficiency True Output Disconnect Inrush Current Limiting When Power On Output Current up to 1000mA at Vin=3V and Vout=5.0V Fixed Frequency Operation Up to 1MHz 0.9V to 4.75V Input Range 2.5V to 5.0V Adjustable Output Voltage Guaranteed 1.0V Start-Up Programmable Current Limit z z z z z z z z z Internal Soft-Start Internal Compensation Pulse Sipping Mode at Light Load Operation Hiccup Mode Short Protection Over Voltage Protection Over Temperature Protection <1uA Shutdown Current Power Good Indicator MSOP-8 and U-DFN3030-12 packages DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M Pow er Analog Microelectronics, Inc. Rev. V1.0 May.2014 2 PAM2401 EVB User Guide CONFIDENTIAL INFORMATION 4． EV Board Schematic - OPT 5． EVB PAM2401 Description PAM2401 EB33AA and EB33AB are both suitable evaluation board for the PAM2401, a DC/DC converter. The board is targeted to be used in providing a simple and convenient evaluation environment for the PAM2401. Requires parts, power supply connectors etc. on the board, which makes it easy to be evaluated. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M Pow er Analog Microelectronics, Inc. Rev. V2.0 April. 2014 3 PAM2401 EVB User Guide CONFIDENTIAL INFORMATION 6. EV Board View EB33AA EB33AB 7. Resistor select for output voltage setting Vout = (1+R1/R2)×Vref ( For EB33AA) (Vref=0.6V) Vout = (1+R2/R3)×Vref ( For EB33AB) Vo R1(R2) R2(R3) L1 3.3V 680k 150k 1.5uH 3.6V 750k 150k 1.5uH 4.2V 620k 100k 1.5uH 5V 825k 110k 2.2uH DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M Pow er Analog Microelectronics, Inc. Rev. V2.0 April. 2014 4 PAM2401 EVB User Guide CONFIDENTIAL INFORMATION 8. External Components Selection Input & output Capacitors (C1/2/5, C3/4) (1) For lower output ripple, low ESR is required. (2) Low leakage current needed, X5R/X7R ceramic recommend, multiple capacitor parallel connection. (3) For output lower than 4.2V application, the minimum value of output capacitor should more than 32uF at least. Output Voltage programmer resistors (R1/2, R2/3) (1) For programmer output voltage (2) For accurate output voltage, 1% tolerance is required. Inductor (L1) (1) Low DCR for good efficiency (2) Inductance saturate current must higher than the output current Current Limit Set resistor (R3/4) (1) Rset floating or Rset >200K, Ilimit=3A (2) Rset=100K, Ilimit=1.5A (3) Rset=66K, Ilimit=1A 9. Evaluation board BOM list for EB33AA: Item Value C1,C2,C5 10uF C3,C4 22uF L1 2.2uH R1 825K 0805 1% R2 110K 0805 1% R3 Floating IC1 PCB Type X5R/X7R, Ceramic/0805 X5R/X7R, Rating Description 10V Input coupling CAP 10V Ceramic/0805 >3A TAIYO YUDEN EMK212ABJ106KD-T Output coupling TAIYO YUDEN CAP EMK212ABJ106KD-T Inductor CDMC6D28NP-2R2M Voltage set RES* Current Limit Res PAM2401 Description Ilimit=3A MSOP-8 PAM2401 EB33AA *Note: The present value of R1/R2 are based on Vout=5V DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M Pow er Analog Microelectronics, Inc. Rev. V2.0 April. 2014 5 PAM2401 EVB User Guide CONFIDENTIAL INFORMATION 10. Evaluation board BOM list for EB33AB: Item Value C1,C2,C5 10uF C3,C4 22uF L1 2.2uH R1 0Ω R2 825K 0805 1% R3 110K 0805 1% R4 Floating IC1 PCB Type Rating X5R/X7R, 10V Ceramic/0805 X5R/X7R, 10V Ceramic/0805 >3A Description Description Input coupling TAIYO YUDEN CAP EMK212ABJ106KD-T Output coupling TAIYO YUDEN CAP EMK212ABJ106KD-T Inductor CDMC6D28NP-2R2M X5R/X7R, Ceramic/0805 Voltage set RES* Current Limit Res PAM2401 Ilimit=3A DFN3030-12 PAM2401 EB33AB *Note: The present value of R1/R2 are based on Vout=5V DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M Pow er Analog Microelectronics, Inc. Rev. V2.0 April. 2014 6