LT3513EUHFTRPBF

Product Summary

The LT3513EUHFTRPBF 5-output is an adjustable switching regulator provides power for large TFT-LCD panels. The 38-pin5mm×7mm QFN device can generate a 3.3V or 5V logicsupply along with the triple output supply required for theTFT-LCD panel. A lower voltage secondary logic supplymay also be generated with the addition of an external NPN driven by the internal linear regulator. A step-down regulator provides a low voltage output, VLOGIC, with upto 1.2A of current while capable of operating from a wide input range of 4.5V to 30V. A high power step-up con-verter, a lower power step-up converter and an invertingconverter provide the three independent output voltages:AVDD, VON and VOFF required by the LCD panel. A high-side PNP of the LT3513EUHFTRPBF provides delayed turn-on of the VON signal and canhandle up to 30mA. Protection circuitry ensures that VON is disabled if any of the four outputs are more than 10%below the programmed voltage. Applications include Automotive TFT-LCD Displays, Large TFT-LCD Desktop Monitors and Flat Panel Televisions.

Parametrics

LT3513EUHFTRPBF absolute maximum ratings: (1)LDOPWR Voltage: 32V; (2)UVLO Voltage: 32V; (3)SW2, SW3, SW4 Voltage: 40V; (4)E3 Pin Voltage: 40V; (5)VON, VONSINK Voltage: 40V; (6)PGOOD Voltage: 40V; (7)D4 Voltage: 1V, –40V; (8)BOOST Voltage: 37V; (9)BOOST Over SW1: 8V; (10)SENSE+, SENSE–Voltage: 10V; (11)VON_CLK Voltage: 10V; (12)BIAS, BD Voltage: 10V; (13)CT Pin Voltage: 5V; (14)RUN-SS1, RUN-SS2, RUN-SS3/4 Voltage: 5V; (15)FB1, FB2, FB3, FB5 Voltage: 5V; (16)NFB4 Voltage: 5V, –5V; (17)VC1, VC2, VC3, VC4 Voltage: 5V; (18)Junction Temperature: 125℃; (19)Operating Temperature Range (Note 2): –40℃ to 125℃; (20)Storage Temperature Range:–65℃ to 125℃.

Features

LT3513EUHFTRPBF features: (1)4.5V to 30V Input Voltage Rangen; (2)Four Integrated Switches: 2.2A Buck, 1.5A Boost, 0.25A Boost, 0.25A Inverter (Guaranteed MinimumCurrent Limit); (3)External NPN LDO Driver; (4)Fixed Frequency, Low Noise Outputs; (5)Inductor Current Sense for Buck; (6)Soft-Start for All Outputs; (7)Externally Programmable VON Delay; (8)Three Integrated Schottky Diodes; (9)PGOOD Pin for AVDD Output Disconnect; (10)PanelProtectTM Circuitry Disables VON Upon Fault; (11)Thermally Enhanced 38-Lead 5mm× 7mm QFN Package.

Diagrams