MAX15041ETE+ Maxim Integrated Products, MAX15041ETE+ Datasheet - Page 16

• Manufacturer Part Number: MAX15041ETE+
• Description: IC DCDC CONV STP-DN SYNC 16TQFN
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX15041ETE+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 25.2 V
• Current - Output: 3A
• Frequency - Switching: 350kHz
• Voltage - Input: 4.5 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Power - Output: 1.67W
• Output Voltage: 5.1 V
• Supply Current: 2.1 mA
• Switching Frequency: 350 KHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
2) Place capacitors on V
3) Keep the high-current paths as short and wide as
Figure 3. Typical Operating Circuit (4.5V to 28V Input Buck Converter)
Table 1. Typical Component Values for Common Output-Voltage Settings
16
possible to the IC and the corresponding pin using
direct traces. Keep the power ground plane (con-
nected to PGND) and signal ground plane (connect-
ed to SGND) separate. PGND and SGND connect at
only one common point near the input bypass
capacitor return terminal.
possible. Keep the path of switching current short
and minimize the loop area formed by LX, the output
capacitors, and the input capacitors.
4.5V TO 28V
______________________________________________________________________________________
V
INPUT
OUT
PGOOD
5.0
3.3
2.5
1.8
1.2
C
47 F
IN
(V)
10k
R
PU
L (µH)
DD
4.7
4.7
3.3
2.2
2.2
C
1 F
, IN, and SS as close as
VDD
C
0.01 F
SS
IN
EN
V
PGOOD
SS
DD
C
I.C.
C
MAX15041
12
22
33
47
8
(nF)
D
SGND
COMP
PGND
BST
LX
FB
100pF
4) Connect IN, LX, and PGND separately to a large
5) Ensure all feedback connections are short and
6) Route high-speed switching nodes (such as LX and
C
CC
R
47
copper area to help cool the IC to further improve
efficiency.
direct. Place the feedback resistors and compensa-
tion components as close as possible to the IC.
BST) away from sensitive analog areas (such as FB
and COMP).
BST
R
10nF
C
C
2.70
1.80
1.50
1.00
0.68
BST
(k )
R
1.8k
C
12nF
C
C
4.7 H
Calculate R
L
Setting the Output Voltage section.
22 F
C
OUT
Select R
5k
1
using the equation in the
R
1
and R
R
2
2
so that:
R
45.3k
1%
R
10.0k
1%
50k
1
2
2
OUTPUT = 3.3V