Datasheet
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Discussion and Component Selection
Table 1. Components List
Designator Part Type Manufacturer and Model No Footprint Description
U1 LM2661 Texas Instruments VSSOP-8 Charge-pump voltage converter
D1 Diode Motorola (MBR0520LT1) SOD123 20 V, 0.5A Start-up diode
C1 22µF Taiyo-Yuden 1206 Low ESR charge-pump capacitor,
(EMK432BJ226MM) MLCC
C2 22µF Taiyo-Yuden 1206 Low ESR charge-pump capacitor,
(EMK432BJ226MM) MLCC
U2 LM2663 Texas Instruments SO-8 Charge-pump voltage converter
C3 10µF Taiyo-Yuden 1206 Low ESR charge-pump capacitor,
(JMK316BJ106ML-T) MLCC
C4 10µF Taiyo-Yuden 1206 Low ESR charge-pump capacitor,
(JMK316BJ106ML-T) MLCC
U3 LM2664 Texas Instruments SOT23-6 Charge-pump voltage converter
C5 3.3µF Taiyo Yuden 1206 Low ESR charge-pump capacitor,
(LMK316BJ335ML-T) MLCC
C6 3.3µF Taiyo Yuden 1206 Low ESR charge-pump capacitor,
(LMK316BJ335ML-T) MLCC
VIN1, VIN2, Headers (36 posts Amphenol (842-800-272-015) 0.1" spacing Connectors for input voltage, output
VIN3, J1, J2, per strip) Newark stock # 87F6830 voltage, and ON/OFF jumpers (2/3
J3, J4 strip used, 22 posts used, 19 actual
pins used per board)
J1, J2, J3 Shunts Circuit Assembly Corp. (CA-02SJC-B) Shunts for ON/OFF jumpers, shorts 2
Newark stock # 90F9279 pins, 3 shunts used per board
Table 2. Contact Information
Texas Instruments www.ti.com 1-800-272-9959
Motorola www.mot.com 1-800-521-6274
Taiyo Yuden www.T-Yuden.com 1-800-348-2496
Newark www.Newark.com 1-800-298-3133
Table 3. Switched Capacitor Family
R
O
I
OUT
V
IN
Shut Freq. Freq.
Product Function (Ω) (mA) Range f
OSC
kHz I
Q
(µA) down Control Sync Package
LM2660 −V
IN
or 2 V
IN
6.5 100 1.5 to 5.5 10/80 120/400 No Yes Yes VSSOP-8,
SOIC-8
LM2661 −V
IN
or 2 V
IN
6.5 100 1.5 to 5.5 80 1000 Yes No Yes VSSOP-8,
SOIC-8
LM2662 −V
IN
or 2 V
IN
3.5 200 1.5 to 5.5 20/150 300/1300 No Yes Yes SOIC-8
LM2663 −V
IN
or 2 V
IN
3.5 200 1.5 to 5.5 150 1300 Yes No Yes SOIC-8
LM2664 −V
IN
12 40 1.8 to 5.5 160 220 Yes No No SOT23-6
LM2665 2 V
IN
12 40 1.8 to 5.5 160 550 Yes No No SOT23-6
LM3350 3/2 V
IN
or 2/3 V
IN
4.2/1.8 50 1.5 to 5.5 1600 3750 Yes No No VSSOP-8
LM3351 3/2 V
IN
or 2/3 V
IN
4.2/1.8 50 1.5 to 5.5 400 1110 Yes No No VSSOP-8
5
SNVA014C–November 1999–Revised April 2013 AN-1142 LM2661/3/4 Evaluation Board
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