MAX1533AETJ+ Maxim Integrated Products, MAX1533AETJ+ Datasheet - Page 30

• Manufacturer Part Number: MAX1533AETJ+
• Description: IC POWER SUPPLY CONTROLER 32TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1533AETJ+

• Applications: Power Supply Controller
• Voltage - Input: 4.5 ~ 26 V
• Current - Supply: 15µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
9a. This configuration constantly monitors the inductor
current, allowing accurate current-limit protection.
Alternatively, high-power applications that do not
require highly accurate current-limit protection may
reduce the overall power dissipation by connecting a
series RC circuit across the inductor (Figure 9b) with an
equivalent time constant:
Figure 9. Current-Sense Configurations
30
______________________________________________________________________________________
R
L
L
=
C
EQ
a) OUTPUT SERIES RESISTOR SENSING
b) LOSSLESS INDUCTOR SENSING
×
MAX1533A
MAX1537A
MAX1533A
MAX1537A
R
EQ
CSH_
CSH_
CSL_
CSL_
GND
DH_
DH_
GND
DL_
LX_
DL_
LX_
N
N
N
N
H
H
L
L
where R
configuration, the current-sense resistance equals the
inductor’s DC resistance (R
case inductance and R
tor manufacturer, adding some margin for the
inductance drop over temperature and load.
The output filter capacitor must have low enough equiv-
alent series resistance (ESR) to meet output ripple and
load-transient requirements, yet have high enough ESR
to satisfy stability requirements. The output capaci-
tance must be high enough to absorb the inductor
D
C
C
D
IN
L
IN
L
INPUT (V
INPUT (V
L
IN
)
IN
is the inductor’s series DC resistance. In this
L
)
R
EQ
INDUCTOR
Output Capacitor Selection
C
R
EQ
SENSE
L
values provided by the induc-
SENSE
= R
C
OUT
L
). Use the worst-
C
OUT