5-Output Regulator. LT3513 Datasheet

LT3513 Regulator. Datasheet pdf. Equivalent

Part LT3513
Description 2MHz High Current 5-Output Regulator
Feature www.DataSheet4U.com LT3513 2MHz High Current 5-Output Regulator for TFT-LCD Panels DESCRIPTION The .
Manufacture Linear Technology
Total Page 20 Pages
Datasheet
Download LT3513 Datasheet



LT3513
www.DataSheet4U.com
LT3513
2MHz High Current
5-Output Regulator
for TFT-LCD Panels
FEATURES
n 4.5V to 30V Input Voltage Range
n Four Integrated Switches: 2.2A Buck, 1.5A Boost,
0.25A Boost, 0.25A Inverter (Guaranteed Minimum
Current Limit)
n External NPN LDO Driver
n Fixed Frequency, Low Noise Outputs
n Inductor Current Sense for Buck
n Soft-Start for All Outputs
n Externally Programmable VON Delay
n Three Integrated Schottky Diodes
n PGOOD Pin for AVDD Output Disconnect
n PanelProtectTM Circuitry Disables VON Upon Fault
n Thermally Enhanced 38-Lead 5mm × 7mm QFN
Package
APPLICATIONS
n Automotive TFT-LCD Displays
n Large TFT-LCD Desktop Monitors
n Flat Panel Televisions
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
regulator provides a low voltage output, VLOGIC, with up
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:
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.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PanelProtect is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
VIN
8V TO 16V
VOFF
–10V
20mA
2.2μF
0.47μF
10μH
69.8k
10k
VLOGIC
5V
0.5A
30.1k
22μF
10k
VLDO
3.3V
0.5A
10μF
42.2k
10k
10μF 178k
VLOGIC
5V
10μH
53.6k 100k
60.4k
UVLO LDOPWR VIN
SW4
D4
NFB4
4.7μH
0.22μF
BIAS
BOOST
SW1
SENSE+
SENSE
FB1
LT3513
BD
FB5
VC1 VC2
GND
SW2
FB2
PGOOD
RUN-SS1
RUN-SS2
RUN-SS3/4
CT
VON_CLK
VON
VONSINK
E3
SW3
FB3
VC3 VC4
10k 10μF
47nF
VON_CLK
232k
15nF
6.8μH
165k
VLOGIC
5V
10k
7.5k 4.7k 30k 13k
2.7nF
4.7nF 1.5nF
2.2nF
AVDD
8V
80mA
15nF
15nF
RUN/SS 2V/DIV
VLOGIC 5V/DIV
AVDD 10V/DIV
VOFF 10V/DIV
2.2μF
VON
22V
20mA
VE3 20V/DIV
0.47μF
VON 20V/DIV
IIN(AVG) 1A/DIV
Start-Up Waveforms
5ms/DIV
3513 TA01b
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LT3513
LT3513www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN, LDOPWR Voltage ...............................................32V
UVLO Voltage............................................................32V
SW2, SW3, SW4 Voltage ..........................................40V
E3 Pin Voltage...........................................................40V
VON, VONSINK Voltage ................................................40V
PGOOD Voltage.........................................................40V
D4 Voltage ........................................................ 1V, –40V
BOOST Voltage .........................................................37V
BOOST Over SW1 .......................................................8V
SENSE+, SENSEVoltage..........................................10V
VON_CLK Voltage........................................................10V
BIAS, BD Voltage ......................................................10V
CT Pin Voltage.............................................................5V
RUN-SS1, RUN-SS2, RUN-SS3/4 Voltage ..................5V
FB1, FB2, FB3, FB5 Voltage.........................................5V
NFB4 Voltage ...................................................... 5V, –5V
VC1, VC2, VC3, VC4 Voltage ..........................................5V
Junction Temperature ........................................... 125°C
Operating Temperature Range (Note 2).. –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
FB5 1
VC1 2
RUN-SS3/4 3
FB3 4
RUN-SS2 5
SW3 6
E3 7
VON 8
VONSINK 9
VON_CLK 10
PGOOD 11
VC3 12
38 37 36 35 34 33 32
39
13 14 15 16 17 18 19
31 SENSE+
30 SENSE
29 BIAS
28 BOOST
27 LDOPWR
26 BD
25 SW4
24 D4
23 NFB4
22 RUN-SS1
21 VC4
20 VC2
UHF PACKAGE
38-LEAD (5mm s 7mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/W, θJC = 1°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3513EUHF#PBF
LT3513EUHF#TRPBF
3513
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 125°C
LT3513IUHF#PBF
LT3513IUHF#TRPBF
3513
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, BIAS = 3V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Input Voltage
l 4.5 V
Quiescent Current
RUN-SS1, RUN-SS2, RUN-SS3/4 Pin Current
Not Switching
VRUNSS1 = 0V
RUN-SS1= RUN-SS2 = RUN-SS3
= RUN-SS4 = 0.4V
7.5 12
30 65
2
mA
μA
μA
RUN-SS1, RUN-SS2, RUN-SS3/4 Threshold
0.8 V
BIAS Pin Voltage to Begin RUN-SS2, RUN-SS3/4
l
2.25 2.7
V
BIAS Pin Current
BIAS = 3.1V, All Switches Off
16.5 20
mA
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