MAX8649EWE+T Maxim Integrated Products, MAX8649EWE+T Datasheet - Page 29

• Manufacturer Part Number: MAX8649EWE+T
• Description: IC REG STEP-DOWN 1.8A 16-WLP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX8649EWE+T

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.75 ~ 1.38 V
• Current - Output: 1.8A
• Frequency - Switching: 3.25MHz
• Voltage - Input: 2.5 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-WLP
• Power - Output: 1.04W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Calculate the inductor value (L
ing formula:
This sets the peak-to-peak inductor current ripple to 1/4
the maximum output current. The oscillator frequency,
f
Table 12. Recommended Inductors
OSC
MANUFACTURER
Hitachi Metals
Taiyo Yuden
, is 3.25MHz, and the duty cycle, D, is:
Coilcraft
TOKO
FDK
TDK
1.8A Step-Down Regulator with Differential
L
IDEAL
Applications Information
______________________________________________________________________________________
=
D
4
KSLI-2520AG
KLSI-2016AG
I
MIPSA2520D
OUT MAX
=
×
VLS3015T
Multilayer
Multilayer
CKP3216
Multilayer
DE2812C
LPS3008
LPS3010
SERIES
NR3015
V
V
IN
OUT
V
(
IN
×
IDEAL
Inductor Selection
D
Remote Sense in 2mm x 2mm WLP
)
×
×
(
f
1-
OSC
) using the follow-
D
)
INDUCTANCE
(µH)
0.75
0.56
0.56
0.80
0.68
1.0
1.5
2.2
1.0
1.5
0.5
1.3
1.6
2.0
1.0
1.5
2.2
1.0
1.5
1.0
2.2
1.2
1.5
2.0
1.0
1.5
2.2
1.0
1.5
1.8
2.2
Given L
0.25 x I
I
inductor exceeds the peak inductor current, and the
rated maximum DC inductor current exceeds the maxi-
mum output current I
er than L
however, if much smaller values are used, peak inductor
current rises and a larger output capacitance may be
required to suppress output ripple. Larger inductance
values than L
current, but typically require a physically larger inductor
size. See Table 12 for recommended inductors.
DC RESISTANCE
OUT(MAX)
(Ω typ)
0.075
0.075
0.115
0.048
0.070
0.032
0.044
0.050
0.067
0.072
0.092
0.125
0.134
0.070
0.080
0.085
0.120
0.150
0.09
0.09
0.13
0.11
0.10
0.09
0.06
0.11
0.13
0.14
0.03
0.04
IDEAL
OUT(MAX)
IDEAL
. Make sure that the saturation current of the
, the peak-to-peak inductor ripple current is
IDEAL
can be used to reduce inductor size;
. The peak inductor current is 1.125 x
CURRENT RATING
can be used to obtain higher output
OUT(MAX)
(mA)
1800
1800
1400
1500
1500
1100
2000
2000
2000
2000
1100
1000
2100
1800
2000
1400
2300
1800
1500
1400
1800
1600
1400
1150
2300
1800
1600
1300
1200
900
. Inductance values small-
L x W x H (mm)
DIMENSIONS
2.5 x 2.0 x 1.0
2.0 x 1.6 x 1.0
2.5 x 2.0 x 0.5
3.2 x 1.6 x 0.9
3.0 x 3.0 x 1.5
3.0 x 3.0 x 1.5
3.2 x 3.0 x 1.2
3.0 x 3.0 x 0.8
3.0 x 3.0 x 1.0
29