MAX15034BEVKIT+ Maxim Integrated Products, MAX15034BEVKIT+ Datasheet - Page 21

• Manufacturer Part Number: MAX15034BEVKIT+
• Description: KIT EVALUATION FOR MAX15034
• Manufacturer: Maxim Integrated Products

Specifications of MAX15034BEVKIT+

• Main Purpose: DC/DC, Step Down
• Voltage - Input: 5 ~ 28V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: MAX15034
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Output: -
• Power - Output: -
• Frequency - Switching: -
• Outputs And Type: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Set the RC time constant to be 1.1 to 1.2 times the
inductor time constant (L/DCR). Select C1 to be in the
0.1μF to 0.47μF range, and then calculate R1 from:
In some applications, it may be useful to add a resistor
(R2 in Figure 9) in series with the CSN_ connection to
minimize input offset error. Set R2 equal to R1. It may
also prove useful to add capacitor C3 (Figure 9) in
Figure 8. Noninductive Resistive Sense
Figure 9. Lossless Inductor Sense
Table 3. Current-Sense Configurations
Output Current-Sense Resistor
Equivalent Inductor DC Resistance
Configurable, Single-/Dual-Output, Synchronous
Buck Controller for High-Current Applications
METHOD
R k
1
[
______________________________________________________________________________________
Ω
]
=
MAX15034
MAX15034
DCR m
1 2
[
.
Ω
×
CSN_
CSN_
L H
]
CSP_
CSP_
×
LX_
LX_
[
μ
C
1
]
[
μ
F
CURRENT-SENSE
]
ACCURACY
High
Low
C2*
parallel with R2 to aid in short-circuit recovery. Set C3
equal to C1. Finally, it may be helpful to add a 100pF
(C2) capacitor immediately across the CSP_ and CSN_
inputs to minimize high-frequency noise pick-up at the
IC in some applications.
For current-sense resistors that have a noticeable
inductance component, use lossless inductor sense
implementation (and design procedure). See Figure 10.
Table 3 highlights the tradeoffs of each current-sense
method.
L
OUT
Allowed (highest accuracy)
INDUCTOR-SATURATION
PROTECTION
R1
Allowed
L
INDUCTOR
R
SENSE
DCR
C1
CURRENT-SENSE POWER
R2*
LOSS (EFFICIENCY)
No additional loss
*OPTIONAL.
R
V
SENSE
OUT
C3*
V
OUT
x I
OUT 2
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