MFG:Linear Technology Category:Integrated Circuits (ICs) Package Cooled:05+PB D/C:09+
LT1942EUF-TRPBF, LT1943, LT1943EFE Datasheet download
Category: Integrated Circuits (ICs)
MFG: Linear Technology
Package Cooled: 05+PB
D/C: 09+
Description: IC REG SW QUAD TFT LCD 28-TSSOP
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Datasheet: LT10.7MS2
File Size: 121594 KB
Manufacturer: ETC [ETC]
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PDF/DataSheet Download
Datasheet: LT1943
File Size: 274309 KB
Manufacturer: Linear
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PDF/DataSheet Download
Datasheet: LT1943EFE
File Size: 286335 KB
Manufacturer: LINER [Linear Technology]
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The LT®1943 quad output adjustable switching regulator provides power for large TFT LCD panels. The device, housed in a low profile 28 pin thermally enhanced TSSOP package, can generate a 3.3V or 5V logic supply along with the triple output supply required for the TFT LCD panel. Operating from an input range of 4.5V to 22V, a step-down regulator provides a low voltage output VLOGIC with up to 2A current. A high-power step-up converter, a lowerpower step-up converter and an inverting converter provide the three independent output voltages AVDD, VON and VOFF required by the LCD panel. A high-side PNP provides delayed turn-on of the VON signal and can handle up to 30mA. Protection circuitry ensures VON is disabled if any of the four outputs are more than 10% below normal voltage.
All switchers are synchronized to the internal 1.2MHz clock, allowing the use of low profile inductors and ceramic capacitors throughout. A current mode architecture provides excellent transient response. For best flexibility, all outputs are adjustable. Soft-start is included in all four channels. A PGOOD pin can drive an optional PMOS pass device to provide output disconnect for the AVDD output.
VIN Voltage .............................................................. 25V
BOOST Voltage ........................................................ 36V
BOOST Voltage Above SW1 ..................................... 25V
BIAS Pin Voltage ..................................................... 18V
SW2, SW4 Pin Voltages .......................................... 40V
SW3 Voltage ............................................................ 36V
FB1, FB2, FB3, FB4 Voltages ...................................... 4V
NFB4 Voltage ............................................... +6V, 0.6V
VC1, VC2, VC3, VC4 Pin Voltages .............................. 6V
RUN-SS, SS-234 Pin Voltages ................................... 6V
PGOOD Pin Voltage ................................................. 36V
E3 Pin Voltage ......................................................... 36V
VON Voltage ............................................................. 36V
CT Pin Voltage ........................................................... 6V
Junction Temperature ........................................ 125°C
Operating Temperature Range (Note 2)40°C to 85°C
Storage Temperature Range ..............65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
| Technical/Catalog Information | LT1943EFE |
| Vendor | Linear Technology |
| Category | Integrated Circuits (ICs) |
| Package / Case | 28-TSSOP |
| Packaging | Tube |
| Type | TFT-LCD Voltage Regulator |
| Voltage - Input | 4.5 ~ 22 V |
| Voltage - Output | 1.25 ~ 40 V |
| Number of Outputs | 4 |
| Applications | Converter, TFT/LCD |
| Operating Temperature | -40°C ~ 85°C |
| Drawing Number | 161; 05-08-1663 var EB; FE; 28 |
| Lead Free Status | Contains Lead |
| RoHS Status | RoHS Non-Compliant |
| Other Names | LT1943EFE LT1943EFE |
The LT1943EFE is designed as one kind of high current quad output regulator for TFT LCD panels,it provides power for large TFT LCD panels.The device, housed in a low profile 28 pin thermally enhanced TSSOP package, can generate a 3.3V or 5V logic supply along with the triple output supply required for the TFT LCD panel.Operating from an input range of 4.5V to 22V, a step-down regulator provides a low voltage output VLOGIC with up to 2A current. A high-power step-up converter, a lowerpower step-up converter and an inverting converter provide the three independent output voltages AVDD, VON and VOFF required by the LCD panel. A high-side PNP provides delayed turn-on of the VON signal and can handle up to 30mA. Protection circuitry ensures that VON is disabled if any of the four outputs are more than 10% below the programmed voltage.
Features of the LT1943EFE are:(1)fixed frequency,low noise outputs;(2)soft-start for all outputs;(3)externally programmable VON delay;(4)integrated schottky diode for VON output;(5)4.5V to 22V input voltage range;(6)available in thermally enhanced 28-Lead TSSOP;(7)4 integrated switches: 2.4A buck,2.6A boost,0.35A boost,0.35A inverter (guaranteed minimum current limit).It can be used in large TFT-LCD desktop monitors and flat panel televisions.
The absolute maximum ratings of the LT1943EFE can be summarized as:(1)VIN voltage:25V;(2)bOOST voltage:36V;(3)boost voltage above SW1:25V;(4)BIAS pin voltage:18V;(5)SW2,SW4 pin voltages:40V;(6)SW3 voltage:40V;(7)lead temperature (soldering,10 sec):300°C;(8)storage temperature range:65°C to 150°C;(9)operating temperature range:40°C to 85°C;(10)junction temperature:125°C;(11)E3 pin voltage:38V.If you want to know more information about this part,please download the datasheet in www.seekic.com and www.chinaicmart.com .
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