MAX1531 Maxim Integrated Products, MAX1531 Datasheet
MAX1531
Manufacturer Part Number
MAX1531
Description
(MAX1530 / MAX1531) Multiple-Output Power-Supply Controllers for LCD Monitors
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX1531.pdf
(33 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX1531E
Manufacturer:
MAXIM/美信
Quantity:
20 000
www.DataSheet4U.com
DataSheet U .com
The MAX1530/MAX1531 multiple-output power-supply
controllers generate all the supply rails for thin-film tran-
sistor (TFT) liquid-crystal display (LCD) monitors. Both
devices include a high-efficiency, fixed-frequency,
step-down regulator. The low-cost, all N-channel, syn-
chronous topology enables operation with efficiency as
high as 93%. High-frequency operation allows the use
of small inductors and capacitors, resulting in a com-
pact solution. The MAX1530 includes three linear regu-
lator controllers and the MAX1531 includes five linear
regulator controllers for supplying logic and LCD bias
voltages. A programmable startup sequence enables
easy control of the regulators.
The MAX1530/MAX1531 include soft-start functions to
limit inrush current during startup. An internal step-
down converter current-limit function and a versatile
overcurrent shutdown protect the power supplies against
fault conditions. The MAX1530/MAX1531 use a current-
mode control architecture, providing fast load transient
response and easy compensation. An internal linear
regulator provides MOSFET gate drive and can be
used to power small external loads.
The MAX1530/MAX1531 can operate from inputs as
high as 28V and are well suited for LCD monitor and TV
applications running directly from AC/DC wall adapters.
Both devices are available in a small (5mm x 5mm),
ultra-thin (0.8mm), 32-pin QFN package and operate
over the -40°C to +85°C temperature range.
4
19-2866; Rev 0; 5/03
Pin Configuration appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX1530ETJ
MAX1531ETJ
PART
LCD Monitors and TVs
Automotive LCDs
Multiple-Output Power-Supply Controllers for
________________________________________________________________ Maxim Integrated Products
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
General Description
Applications
PIN-PACKAGE
32 Thin QFN
32 Thin QFN
o 4.5V to 28V Input Voltage Range
o 250kHz/500kHz Current-Mode Step-Down Converter
o Three Positive Linear Regulator Controllers
o Timed Reset Output
o Uncommitted Overcurrent Protection (MAX1531)
o Soft-Start for All Regulators
o Programmable Input Undervoltage Comparator
o Programmable Startup Sequencing
V
3.3V/1.5A
OUT
V
IN
Small Inductor/Capacitors
No Sense Resistor
One Positive and One Negative Additional
Controller (MAX1531)
Small Input and Output Capacitors
= 12V
V
V
N
P
2.5V/500mA
V
LOGIC
V
V
OUT
GON
25V
V
V
P
L
Minimal Operating Circuit
V
L
LCD Monitors
V
IN
SEQ
BST
DH
LX
DL
PGND
FB
COMP
RESET
RSTIN
DRV1
FBL1
DRV3
FBL3
IN
MAX1530
AGND
DRV4
DRV2
ONL2
ONL3
ONL4
ONL5
DRV5
FREQ
FBL4
FBL2
FBL5
CSH
ILIM
CSL
EN
VL
Features
VL
V
L
V
IN
V
10V/500mA
SOURCE
V
V
9.7V
V
V
-9V
IN
GAMMA
N
GOFF
1
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