Datasheet

0.0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
I
OUT
(A)
70
95
EFFICIENCY (%)
75
80
85
90
V
IN
= 3.3V
V
IN
= 5.0V
www.ti.com Bill of Materials
6 Bill of Materials
Table 2. LM2854 Bill of Materials (V
IN
= 2.95V to 5.5V, V
OUT
= 1.2V, I
OUT (MAX)
= 4A)
Ref. Function Description Case Size Manufacturer Manufacturer P/N
Des.
U1 Buck Regulator Synchronous Buck HTSSOP-16 Texas Instruments LM2854
Regulator
Cin Input Filter 100 µF, 6.3V B2, 3.5 x 2.8 x Sanyo 6TPE100MAPB
1.9mm
Cin2 Input Filter Not Assembled 1210 - -
Co Output Filter 47 µF, X5R, 6.3V 1206 TDK C3216X5R0J476M
Co2 Output Filter Not Assembled 1210 - -
Lf Output Filter 0.82 µH, 14 mΩ 6.9 x 6.5 x 1.8 mm Vishay Dale IHLP2525AHERR82M01
Rfb1 Upper FB Resistor 150 kΩ 0603 Vishay Dale CRCW06032493F-e3
Rfb2 Lower FB Resistor 301 kΩ 0603 Vishay Dale CRCW06034993F-e3
Rc Compensation 2.0 kΩ 0603 Vishay Dale CRCW06031001F-e3
Resistor
Rf AVIN Filter Resistor 1.0Ω 0603 Vishay Dale CRCW06031R0F-e3
Ren Enable Resistor 100 kΩ 0603 Vishay Dale CRCW06031003F-e3
Cc Compensation 33 pF, ±5%, C0G, 50V 0603 TDK C1608C0G1H330J
Capacitor
Css Soft-start Capacitor 10 nF, ±10%, X7R, 0603 TDK C1608X7R1H103K
50V
Cf AVIN Filter Capacitor 1.0 µF, ±10%, X7R, 0603 TDK C1608X7R1C105K
16V
7 Performance Characteristics
Figure 4. LM2854 Demo Board Efficiency Figure 5. LM2854 Transient Response
V
OUT
= 1.2V I
OUT
= 0.4A - 4.0A - 0.4A
7
SNVA358B–August 2008–Revised May 2013 AN-1880 LM2854 1MHz Buck Regulator Demo Board
Submit Documentation Feedback
Copyright © 2008–2013, Texas Instruments Incorporated