MAX1530ETJ ,Multiple-Output Power-Supply Controllers for LCD MonitorsApplicationsDLENLCD Monitors and TVsPGNDILIMAutomotive LCDsFREQ VLFBVLCOMPAGNDRESETOrdering Informa ..
MAX1530ETJ+T ,Multiple-Output Power-Supply Controllers for LCD Monitorsapplications running directly from AC/DC wall adapters. 3.3V/1.5A 10V/500mALXBoth devices are avail ..
MAX1531ETJ+ ,Multiple-Output Power-Supply Controllers for LCD MonitorsApplicationsVLVLCOMP● LCD Monitors and TVsAGNDRESETOrdering InformationRSTIN VINVOUTPART TEMP RANGE ..
MAX1531ETJ+ ,Multiple-Output Power-Supply Controllers for LCD MonitorsFeaturesThe MAX1530/MAX1531 multiple-output power-supply ● 4.5V to 28V Input Voltage Rangecontrolle ..
MAX1531ETJ+T ,Multiple-Output Power-Supply Controllers for LCD MonitorsElectrical Characteristics(Circuit of Figure 1, V = 12V, V = V = 5V, T = 0°C to +85°C, unless other ..
MAX1532ETL , PLASTIC ENCAPSULATED DEVICES
MAX4168EUB ,High-Output-Drive, Precision, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with ShutdownApplicationsPortable Headphone Speaker DriversPin ConfigurationsLaptop/Notebook ComputersSound Port ..
MAX4168EUB ,High-Output-Drive, Precision, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdownapplications and other low-voltage, battery-poweredReduces Supply Current to 38µA Placessystems. Th ..
MAX4168EUB+ ,High-Output-Drive, Precision, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with ShutdownMAX4165–MAX416919-1224; Rev 3; 1/07High-Output-Drive, Precision, Low-Power, Single-Supply, Rail-to- ..
MAX4169ESD ,Quad, high-output-drive, precision, low-power, single-supply +2.7V to +6.5V, Rail-to-Rail I/O op amp.ApplicationsOrdering Information continued at end of data sheet.Portable Head-Phone Speaker Drivers ..
MAX4172 ,Low-Cost, Precision, High-Side Current-Sense AmplifierApplications3V TO 32VLOW-COST 0 TO 32V2ASWITCHING● Portable PCs: Notebooks/Subnotebooks/PalmtopsV A ..
MAX4172ESA ,Low-Cost / Precision / High-Side Current-Sense AmplifierApplications__________Typical Operating CircuitPortable PCs: Notebooks/Subnotebooks/PalmtopsBattery ..
MAX1530ETJ
Multiple-Output Power-Supply Controllers for LCD Monitors
General DescriptionThe 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.
ApplicationsLCD Monitors and TVs
Automotive LCDs
Features4.5V to 28V Input Voltage Range250kHz/500kHz Current-Mode Step-Down Converter
Small Inductor/Capacitors
No Sense ResistorThree Positive Linear Regulator Controllers
One Positive and One Negative Additional
Controller (MAX1531)
Small Input and Output CapacitorsTimed Reset OutputUncommitted Overcurrent Protection (MAX1531)Soft-Start for All RegulatorsProgrammable Input Undervoltage ComparatorProgrammable Startup Sequencing
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
Ordering Information
Minimal Operating Circuit19-2866; Rev 0; 5/03
Pin Configuration appears at end of data sheet.
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, DRV1, DRV2, DRV3, DRV4, CSH,
CSL to AGND.....................................................-0.3V to +30V
DRV5 to VL.............................................................-28V to +0.3V
CSH to CSL..............................................................-0.3V to +6V
VL to AGND..............................................................-0.3V to +6V
PGND to AGND...................................................................±0.3V
LX to BST..................................................................-6V to +0.3V
BST to AGND..........................................................-0.3V to +36V
DH to LX.....................................................-0.3V to (BST + 0.3V)
DL to PGND..................................................-0.3V to (VL + 0.3V)
SEQ, ONL2, ONL3, ONL4, ONL5, COMP,
ILIM to AGND............................................-0.3V to (VL + 0.3V)
RSTIN, RESET, EN, FB, FBL1, FBL2, FBL3, FBL4, FBL5,
FREQ to AGND.....................................................-0.3V to +6V
VL Short Circuit to AGND...........................................Momentary
Continuous Power Dissipation (TA= +70°C)
32-Pin Thin QFN (derate 21.3mW/°C above +70°C)...1702mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= 12V, VEN= VSEQ= 5V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= 12V, VEN= VSEQ= 5V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
ELECTRICAL CHARACTERISTICS (continued)
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VIN= 12V, VEN= VSEQ= 5V, TA = -40°C to +85°C,unless otherwise noted.) (Note 3)
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= 12V, VEN= VSEQ= 5V, TA = -40°C to +85°C,unless otherwise noted.) (Note 3)
Note 1:Operating supply range is guaranteed by VL line regulation test for the range of 5.5V to 28V. Between 4.5V and 5.5V, the VL
regulator might be in dropout; however, the part continues to operate properly.
Note 2:Guaranteed by design and not production tested.
Note 3:Specifications to -40°C are guaranteed by design and not production tested.
Multiple-Output Power-Supply Controllers for
LCD Monitors
Typical Operating Characteristics(Circuit of Figure 1; including R5, R6, and D2; TA= +25°C, unless otherwise noted.)
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
LR1 NORMALIZED LOAD REGULATIONMAX1530 toc10
LOAD CURRENT (mA)
VOLTAGE ERROR (%)
LR1 NORMALIZED LINE REGULATION
MAX1530 toc11
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)43
LR1 LOAD TRANSIENT
MAX1530 toc12
40µs/div
A: LR1 OUTPUT VOLTAGE, 100mV/div, AC-COUPLED
B: LR1 LOAD CURRENT, 500mA/div
2.5V
0mA
LR2/LR3 BASE CURRENT
vs. DRV2/DRV3 VOLTAGEMAX1530 toc13
DRV2/DRV3 VOLTAGE (V)
BASE CURRENT (mA)321
LR2 NORMALIZED LOAD REGULATIONMAX1530 toc14
LOAD CURRENT (mA)
VOLTAGE ERROR (%)302010
LR2 NORMALIZED LINE REGULATION
MAX1530 toc15
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)1713
LR3 NORMALIZED LOAD REGULATION
MAX1530 toc16
LOAD CURRENT (mA)
VOLTAGE ERROR (%)1284
LR3 NORMALIZED LINE REGULATION
MAX1530 toc17
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)3228
LR4 BASE CURRENT
vs. DRV VOLTAGE
MAX1530 toc18
DRV4 VOLTAGE (V)
BASE CURRENT (mA)642
010
ypical Operating Characteristics (continued)(Circuit of Figure 1; including R5, R6, and D2; TA= +25°C, unless otherwise noted.)
Multiple-Output Power-Supply Controllers for
LCD Monitorsypical Operating Characteristics (continued)(Circuit of Figure 1; including R5, R6, and D2; TA= +25°C, unless otherwise noted.)
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitorsypical Operating Characteristics (continued)(Circuit of Figure 1; including R5, R6, and D2; TA= +25°C, unless otherwise noted.)
Pin Description
LR5 NORMALIZED LOAD REGULATIONMAX1530 toc25
LOAD CURRENT (mA)
VOLTAGE ERROR (%)302010
LR5 NORMALIZED LINE REGULATION
MAX1530 toc26
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE ERROR (%)
-25-9
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
Pin Description (continued)
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
Pin Description (continued)
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
Standard Application CircuitThe standard application circuit (Figure1) of the
MAX1531 is a complete power-supply system for TFT
LCD monitors. The circuit generates a 3.3V/1.5A main
output, a 2.5V/500mA output for the timing controller
and digital sections of source/gate drive ICs, a
10V/500mA source drive supply voltage, a 9.7V/50mA
gamma reference, a 25V/20mA gate-on voltage, and a
-10V/50mA gate-off voltage. The input voltage is 12V
±10%. Table1 lists the selected components and Table
2 lists the component suppliers. The standard applica-
tion circuit (Figure2) of the MAX1530 is similar to the
MAX1531 application circuit except that gate-on and
gate-off voltages are eliminated.
Detailed DescriptionThe MAX1530/MAX1531 power-supply controllers pro-
vide logic and bias power for LCD monitors. Figure3
shows the IC functional diagram. The main step-down
controller employs a current-mode PWM control method
to ease compensation requirements and provide excel-
lent load- and line-transient response. The use of syn-
chronous rectification yields excellent efficiency.
The MAX1530 includes three analog gain blocks to
control three auxiliary positive linear regulators, and the
MAX1531 includes five analog gain blocks to control
four positive and one negative linear regulators. Use
the positive gain blocks to generate low-voltage rails
directly from the input voltage or the main step-down
converter output, or higher voltages using charge
MAX1530/MAX1531
Multiple-Output Power-Supply Controllers for
LCD Monitors
