MAX1518ETJ+ Maxim Integrated Products, MAX1518ETJ+ Datasheet - Page 18

• Manufacturer Part Number: MAX1518ETJ+
• Description: IC DC/DC CONV W/OP AMP 32-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1518ETJ+

• Applications: Converter, TFT, LCD
• Voltage - Input: 2.6 ~ 5.5 V
• Number Of Outputs: 1
• Voltage - Output: 2.6 ~ 13 V
• Operating Temperature: -40°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TFT-LCD DC-DC Converters with
Operational Amplifiers
Figure 7. Switch-Control Block
During steady-state operation, if the output of the main
regulator or any of the linear-regulator outputs does not
exceed its respective fault-detection threshold, the
MAX1516/MAX1517/MAX1518 activate an internal fault
timer. If any condition or combination of conditions indi-
cates a continuous fault for the fault-timer duration
(55ms typ), the MAX1516/MAX1517/MAX1518 set the
fault latch to shut down all the outputs except the refer-
ence. Once the fault condition is removed, cycle the
input voltage (below the UVLO falling threshold) to
clear the fault latch and reactivate the device. The fault-
detection circuit is disabled during the soft-start time.
18
______________________________________________________________________________________
DEL
CTL
IN
REF
5µA
Fault Protection
Thermal-overload protection prevents excessive power
dissipation from overheating the MAX1516/MAX1517/
MAX1518. When the junction temperature exceeds T
+160°C, a thermal sensor immediately activates the
fault protection, which shuts down all outputs except
the reference, allowing the device to cool down. Once
the device cools down by approximately 15°C, cycle
the input voltage (below the UVLO falling threshold) to
clear the fault latch and reactivate the device.
The thermal-overload protection protects the controller
in the event of fault conditions. For continuous opera-
tion, do not exceed the absolute maximum junction
temperature rating of T
2.5V
FB OK
FBP OK
FBN OK
1kΩ
Q3
Thermal-Overload Protection
MAX1516
MAX1517
MAX1518
J
= +150°C.
Q1
Q2
SRC
COM
DRN
J
=