LM2650EVAL/NOPB National Semiconductor, LM2650EVAL/NOPB Datasheet - Page 3

• 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

Sleep Resistors RSIA and
RSOA
Input Filter Capacitors C1, C2,
and C6
Bootstrap Capacitor CB
Soft-start Capacitor CSS
VDD Bypass Capacitor CVDD
Input Bulk Capacitors CIN1
and CIN2
Inductor L1
Output Capacitors COUT1,
COUT2, and COUT3
Feedback Resistors R1 and
R2
Compensation Components
RC, CC, R3, and C10
Sleep Resistors RSIA and
RSOA
Frequency Adjusting Resistor
RFA
Applicable Cell Stacks
15 µH
20 µH
33 µH
40 µH
Input Voltage
Output
TABLE 2. Components for Two Typical 90 kHz Application Circuits (Continued)
Core #
T50(B)
T38
T38
T50
TABLE 3. Toroidal Inductors Using Cores from MICROMETALS, INC.
TABLE 4. Components for Two Typical 200 kHz Application Circuits
RSIA = 33 kΩ, RSOA = 200 kΩ
0.1 µF ceramic chip capacitor
0.1 µF ceramic chip capacitor
0.01 µF ceramic chip capacitor
0.2 µF ceramic chip capacitor
22 µF, 35V AVX TPS Series or Sprague 593D
Series tantalum chip capacitor
20 µH (See Table 3.)
220 µF, 10V AVX TPS Series or Sprague 593D
Series tantalum chip capacitor
R1 = 75 kΩ, 1%, R2 = 24.9 kΩ, 1%
RC = 53.6 kΩ, CC = 2.7 nF, R3= 4.02 kΩ, C10
= 4.7 nF
RSIA = 47 kΩ, RSOA = 200 kΩ
RFA = 24.9 kΩ
8- to 12-Cell NiCd or NiMH, 3- to 4-Cell Li Ion, 8- to 11-Cell Alkaline, 6-Cell Lead Acid
Core Material
−52
−52
−52
−18
5V, 3A Out
3
Wire Gauge
AWG #23
AWG #23
AWG #21
AWG #21
7 to 18V IN
RSIA = 39 kΩ, RSOA = 130 kΩ
0.1 µF ceramic chip capacitor
0.1 µF ceramic chip capacitor
0.01 µF ceramic chip capacitor
0.2 µF ceramic chip capacitor
22 µF, 35V AVX TPS Series or Sprague 593D
Series tantalum chip capacitor
15 µH (See Table 3.)
220 µF, 10V AVX TPS Series or Sprague 593D
Series tantalum chip capacitor
R1 = 41.2 kΩ, 1%, R2 = 24.9 kΩ, 1%
RC = 33.2 kΩ, CC= 3.9 nF, R3 = 3.01 kΩ, C10
= 6.8 nF
RSIA = 47 kΩ, RSOA = 91 kΩ
RFA = 24.9 kΩ
# of Strands
3.3V, 3A Out
1
1
1
1
# of Turns
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21
25
41
41