![]() |
Electronic Components Datasheet Search |
|
SP6641BEK-L-5-0 Datasheet(PDF) 9 Page - Sipex Corporation |
|
|
SP6641BEK-L-5-0 Datasheet(HTML) 9 Page - Sipex Corporation |
9 / 13 page ![]() 9 Rev. 5/26/05, *Patent Pending SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23 © Copyright 2002 Sipex Corporation APPLICATION INFORMATION: continued TABLE 1. COMPONENT SELECTION INDUCTORS - SURFACE MOUNT Inductor Specification Sipex Inductance Manufacturer/ Series R Isat Size LxWxH Inductor Manufacturer Part Number (µH) Part Number (Ω) (A) (mm) Type Website SP6641A Ipk = .33A 22 Sumida CDRH5D28-220 0.095 0.90 5.7x5.5x3 Shielded Ferrite Core www.sumida.com SP6641A Ipk = .33A 22 Coilcraft DO1608C-223 0.370 0.70 6.6x4.5x2.9 Unshielded Ferrite Core www.coilcraft.com SP6641A Ipk = .33A 22 TDK NLC453232T-220 0.900 0.37 4.4x3.2x3.2 Unshielded Ferrite Core www.tdk.com SP6641A Ipk = .33A 22 Murata LQH43C220K04 0.600 0.42 4.5x3.2x2.6 Unshielded Ferrite Core www.murata.com SP6641B Ipk = 1A 10 Sumida CDRH5D28-100 0.065 1.30 5.7x5.5x3 Shielded Ferrite Core www.sumida.com SP6641B Ipk = 1A 10 Coilcraft DO1608C-103 0.160 1.10 6.6x4.5x2.9 Unshielded Ferrite Core www.coilcraft.com SP6641B Ipk = 1A 10 Murata LQH55DN100M01 0.077 1.70 5x5x4.7 Unshielded Ferrite Core www.murata.com SP6641B Ipk = 1A 22 Sumida CDRH6D28-220 0.128 1.20 6.7x6.5x3 Shielded Ferrite Core www.sumida.com SP6641B Ipk = 1A 22 Murata LQH55DN220M01 0.160 1.20 5x5x4.7 Unshielded Ferrite Core www.murata.com CAPACITORS - SURFACE MOUNT & THRU-HOLE Capacitor Specification ESR Ripple Size Sipex Capacitance Manufacturer/ (max) Current LxWxH Voltage Capacitor Manufacturer Part Number (µF) Part Number (Ω)@ 45°C (A) (mm) (V) Type Website SP6641A Ipk = .33A 22 TDK C3225X5R0J226M 0.010 4.00 1210 6.3 SMT X5R Cer. www.tdk.com SP6641B Ipk = 1A 100 SANYO 10TPA100M 0.080 1.20 7343 6.3 SMT POSCAP Tant. www.sanyovideo.com SP6641B Ipk = 1A 100 SANYO 16SA100M 0.030 2.70 8Dx10L 16.0 Thru-hole OS-CON www.sanyovideo.com SCHOTTKY DIODE - SURFACE MOUNT Diode Specification Sipex Manufacturer/ VF @ IF IF(AV) Size LxWxH Reverse V Package Manufacturer Part Number Part Number (V) (A) (mm) (V) Type Website SP6641A Ipk = .33A STMicro STPS0520Z 0.39 0.50 3.9x1.7x1.3 20 SOD-123 www.st.com SP6641B Ipk = 1A Zetex ZCHS2000 0.42 2.00 3x3x1.4 40 SOT23-6 www.zetex.com Note: Components highlighted in bold are those used on the SP6641A or SP6641B Evaluation Board. Maximum Startup Current It should be noted that for low input voltages the SP6641 startup circuit can not support large load currents at startup. In startup the SP6641 needs to boost the output from zero volts using a charge pump which has a limited current capacity. Once the output is greater than 1.7 to 1.9V the operate circuit takes over and the SP6641 can supply much more current. Curves of maximum resistive load current in startup for the SP6641A and SP6641B are shown in Fig- ures 13 & 14 and can be compared with Figure 2, maximum load current in operation. Also, Table 2 provides SP6641A 3.3V resistive load current in startup for some low cost 1812 size chip inductors. From the curves in Figures 13 and 14, you can see that for low input voltages, the 22 µH induc- tor has more current capacity at startup than the 10 µH inductor, due to more energy per charge cycle in the relationship 1/2LI2. Thus for 1 cell applications, 22 µH is recommended for more startup current than 10 µH. For 1-cell battery applications, it is recommended to apply any large load current after the SP6641 has started up, typically in a few millisecs. This is typically not a problem in many applications where the load is a processor whose load current is low until the processor voltage comes up. |
Similar Part No. - SP6641BEK-L-5-0 |
|
Similar Description - SP6641BEK-L-5-0 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |