LM2650EVAL/NOPB National Semiconductor, LM2650EVAL/NOPB Datasheet - Page 9

• Manufacturer Part Number: LM2650EVAL/NOPB
• Description: EVALUATION BOARD FOR LM2650X
• Manufacturer: National Semiconductor

Specifications of LM2650EVAL/NOPB

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.5 ~ 16V
• Current - Output: 3A
• Voltage - Input: 4.5 ~ 18V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: LM2650
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -
• Other names: *LM2650EVAL; *LM2650EVAL/NOPB; LM2650EVAL

MICROMETALS
5615 E. La Palma Ave. Anaheim, CA 92807 USA [phone]
Application Circuits
15µH
20µH
33µH
40µH
Components R
Components R
Feedback Resistors R1
Feedback Resistors R1
Output Capacitor C
Output Capacitor C
Applicable Cell Stacks
Applicable Cell Stacks
Sleep Resistors R
Sleep Resistors R
Frequency Adjusting
Input Capacitor C
Input Capacitor C
Input Voltage
Compensation
Input Voltage
Compensation
Resistor R
Inductor L1
Inductor L1
and R
and R
and C
and C
Output
and R2
Output
and R2
SOA
SOA
10
10
C
C
, C
, C
FA
Number
C
C
T50 (B)
SIA
SIA
OUT
OUT
IN
, R
IN
, R
Core
T38
T38
T50
TABLE 2. Toroidal Inductors Using Cores from MICROMETALS, INC.
3
3
,
,
TABLE 1. Components for the Typical 90 kHz Application Circuit
TABLE 3. Components for Typical 200 kHz Applications
(Continued)
Series or Sprague 593D Series
Series or Sprague 593D Series
Series or Sprague 593D Series
Series or Sprague 593D Series
Material
8 to 12 Cell NiCd or NiMh, 3 to 4 Cell Li Ion, 8 to 11 Cell Alkaline, 6 Cell
8 to 12 Cell NiCd or NiMh, 3 to 4 Cell Li Ion, 8 to 11 Cell Alkaline, 6 Cell
Core
2 x 22 µF, 35V AVX TPS
2 x 22 µF, 35V AVX TPS
3x220 µF, 10V AVX TPS
3x220 µF, 10V AVX TPS
−52
−52
−52
−18
40µH (See Table 2 )
20µH (See Table 2 )
R2 = 24.9k , 1%,
R2 = 24.9k , 1%,
R1 = 75k , 1%,
R1 = 75k , 1%,
R
R
R
R
R
R
R
R
R
C
C
C
C
SOA
SOA
5V, 3A Out
5V, 3A Out
FA
C
C
3
SIA
3
SIA
C
10
C
10
= 3.57 k ,
= 4.02 k ,
= 37.4 k ,
= 53.6 k ,
= 4.7 nF,
= 2.7 nF,
= 24.9 k
= 5.6 nF
= 4.7 nF
= 33 k ,
= 33 k ,
= 200 k
= 200 k
9
AWG # 23
AWG # 23
AWG # 21
AWG # 21
Gauge
Wire
7V to 18V IN
7V to 18V IN
Lead Acid
Lead Acid
Number of
Series or Sprague 593D Series
Series or Sprague 593D Series
Series or Sprague 593D Series
Series or Sprague 593D Series
Strands
2 x 22 µF, 35V AVX TPS
2 x 22 µF, 35V AVX TPS
3x220 µF, 10V AVX TPS
3x220 µF, 10V AVX TPS
1
1
1
1
33µH (See Table 2 )
15µH (See Table 2 )
R1 = 41.2k , 1%,
R2 = 24.9k , 1%,
R1 = 41.2k , 1%,
R2 = 24.9k , 1%,
R
R
R
R
R
R
R
R
3.3V, 3A out
C
R
3.3V, 3A out
C
C
C
SOA
FA
C
C
SOA
SIA
3
SIA
C
C
10
3
10
= 3.01 k ,
= 23.2 k ,
= 33.2 k ,
= 2.0 k ,
= 8.2 nF,
= 3.9 nF,
= 24.9 k
= 6.8 nF
= 10 nF
= 39 k ,
= 47 k ,
= 130 k
= 91 k
Number of
www.national.com
Turns
21
25
41
41