LM34910EVAL National Semiconductor, LM34910EVAL Datasheet - Page 2

• Manufacturer Part Number: LM34910EVAL
• Description: BOARD EVALUATION LM34910
• Manufacturer: National Semiconductor

Specifications of LM34910EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 5V
• Current - Output: 1A
• Voltage - Input: 8 ~ 36V
• Regulator Topology: Buck
• Frequency - Switching: 850kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM34910
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

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Low Ripple Output
The ripple voltage at OUT1 will range from )60 mVp-p (at
V
is desired, connect the load to OUT2. The ripple at this
output varies from )8 mVp-p to )26 mVp-p over the input
voltage range. However, the load regulation is not as good at
OUT2 as it is at OUT1 due to the presence of R4.
Bill of Materials
IN
= 8V) to )160 mVp-p (at V
C2, 3
C4, 5
R2, 3
Item
C1
C6
D1
R1
R4
R5
U1
L1
Switching Regulator
Schottky diode
Description
Capacitor
Capacitor
Capacitor
Capacitor
Inductor
Resistor
Resistor
Resistor
Resistor
IN
= 36V). If a low ripple output
TDK CRCW06033832F100
TDK CRCW06032001F100
National Semi LM34910SD
Panasonic ERJ6RQFR22V
TKD SLF6028T-100M1R3
TDK C3225X7R1H225K
TDK C1608X7R1H104K
TDK C1608X7R1H223K
TDK C3216Y5V1A226Z
FIGURE 2. Board Schematic
Zetex ZLLS2000
See data sheet
Mfg. Part No.
2
Increased Current Limit
The evaluation board current limit activates at a load current
of )1.3A. If it is desired to increase the current limit for a
particular application, R5 must be added to the board. Refer
to the data sheet to determine the appropriate value for this
resistor
6 mm x 6 mm
SOT-23-6
Package
LLP-10
1210
0603
0603
1206
0603
0603
0805
0805
0.022 µF, 16V
10 µH, 1.3A
2.2 µF, 50V
0.1 µF, 50V
0.22Ω,
22 µF, 10V
40V, 2.2A
38.3 kΩ
2.0 kΩ
Value
20131302
1
⁄
8
W