Datasheet > 3513

3513

更新时间： 2022-12-26 14:42:40

品牌	Logo	应用领域
凌特 - Linear		稳压器
页数	文件大小	规格书
20页	262K
描述
2MHz High Current 5-Output Regulator for TFT-LCD Panels

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3513 数据手册

LT3513

2MHz High Current

5-Output Regulator

for TFT-LCD Panels

FEATURES

DESCRIPTION

The LT^®3513 5-output adjustable switching regulator

provides power for large TFT-LCD panels. The 38-pin

5mm × 7mm QFN device can generate a 3.3V or 5V logic

supply along with the triple output supply required for the

TFT-LCD panel. A lower voltage secondary logic supply

may also be generated with the addition of an external

NPN driven by the internal linear regulator. A step-down

4.5V to 30V Input Voltage Range

Four Integrated Switches: 2.2A Buck, 1.5A Boost,

0.25A Boost, 0.25A Inverter (Guaranteed Minimum

Current Limit)

External NPN LDO Driver

Fixed Frequency, Low Noise Outputs

Inductor Current Sense for Buck

Soft-Start for All Outputs

regulator provides a low voltage output, V

, with up

LOGIC

Externally Programmable V Delay

to 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 inverting

converter provide the three independent output voltages:

Three Integrated Schottky Diodes

PGOOD Pin for AV Output Disconnect

PanelProtect^TMCircuitry Disables V Upon Fault

Thermally Enhanced 38-Lead 5mm × 7mm QFN

Package

AV , V andV requiredbytheLCDpanel. Ahigh-side

DD ON OFF

PNP provides delayed turn-on of the V signal and can

handle up to 30mA. Protection circuitry ensures that V

is disabled if any of the four outputs are more than 10%

APPLICATIONS

below the programmed voltage.

Automotive TFT-LCD Displays

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

PanelProtect is a trademark of Linear Technology Corporation.

Large TFT-LCD Desktop Monitors

All other trademarks are the property of their respective owners.

Flat Panel Televisions

TYPICAL APPLICATION

10μH

LOGIC

8V TO 16V

10μF

178k

53.6k

10k

100k

10μF

0.47μF

OFF

–10V

60.4k

20mA

UVLO LDOPWR

SW4

SW2

FB2

2.2μF

10μH

Start-Up Waveforms

80mA

69.8k

10k

PGOOD

NFB4

BIAS

RUN-SS1

RUN-SS2

RUN/SS 2V/DIV

BOOST

RUN-SS3/4

5V/DIV

LOGIC

AV 10V/DIV

0.22μF

4.7μH

OFF

47nF

15nF

SW1

LOGIC

0.5A

10V/DIV

LT3513

SENSE

FB1

–

30.1k

ON_CLK

22V

22μF

10k

232k

20mA

ONSINK

20V/DIV

1A/DIV

6.8μH

165k

10k

LOGIC

IN(AVG)

FB5

SW3

FB3

3.3V

0.5A

LDO

0.47μF

3513 TA01b

5ms/DIV

GND

42.2k

10k

2.2μF

10μF

7.5k

2.7nF

4.7k

30k

13k

2.2nF

4.7nF 1.5nF

3513fa

12 3 4 5 6 7...20

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