Datasheet

MAX16952
Maxim Integrated | 18www.maximintegrated.com
36V, 2.2MHz Step-Down Controller
with Low Operating Current
and:
where R
CSHL
is the required current-sense resistor and
R
DCR
is the inductor’s series DC resistance. Use the
typical inductance and R
DCR
values provided by the
inductor manufacturer.
Carefully observe the PCB layout guidelines to ensure
the noise and DC errors do not corrupt the differential
current-sense signals seen by CS and OUT. Place the
sense resistor close to the IC with short, direct traces,
making a Kelvin-sense connection to the current-sense
resistor.
R
L
CRR
DCR
EQ
=+
⎛
⎝
⎜
⎞
⎠
⎟
1
1
1
2
Figure 4. Current-Sense Configurations
MAX16952
DH
DL
L
NH
NL
LX
CS
OUT
DL
GND
R
SENSE
C
OUT
C
IN
INPUT (V
IN
)
a) OUTPUT SERIES RESISTOR SENSING
MAX16952
DH
DL
L
NH
NL
LX
CS
OUT
DL
GND
R
DCR
R
CSHL
=
( )
R
DCR
R2
R1 + R2
R1 R2
C
EQ
INDUCTOR
C
OUT
C
IN
INPUT (V
IN
)
b) LOSSLESS INDUCTOR SENSING
R
DCR
=
[
+
]
L
C
EQ
1
R1
1
R2