EL7585ILZ-T13 Intersil, EL7585ILZ-T13 Datasheet

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EL7585ILZ-T13

Manufacturer Part Number
EL7585ILZ-T13
Description
IC POWER SUPPLY TFT-LCD 20-QFN
Manufacturer
Intersil
Datasheet

Specifications of EL7585ILZ-T13

Applications
Converter, TFT, LCD
Voltage - Input
3 ~ 5 V
Number Of Outputs
4
Voltage - Output
5.5 ~ 20 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
TFT-LCD Power Supply
The EL7585 represents a multiple output regulators for use
in all large panel, TFT-LCD applications. It features a single
boost converter with integrated 3.5A FET, two positive LDOs
for V
for V
programmed to operate in either P-mode or PI-mode for
improved load regulation.
The EL7585 also integrates fault protection for all four
channels. Once a fault is detected, the device is latched off
until the input supply or EN is cycled. This device also
features an integrated start-up sequence for V
then V
latter requires a single external transistor. The timing of the
start-up sequence is set using an external capacitor.
The EL7585 is specified for operation over the -40°C to
+85°C temperature range.
Ordering Information
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
EL7585ILZ
(Note)
EL7585ILZ-T7
(Note)
EL7585ILZ-T13
(Note)
NUMBER
ON
OFF
PART
ON
and V
generation. The boost converter can be
or for V
LOGIC
7585ILZ
7585ILZ
7585ILZ
MARKING
OFF
PART
generation, and a single negative LDO
, V
BOOST
20 Ld 4x4 QFN
(Pb-free)
20 Ld 4x4 QFN
(Pb-free)
20 Ld 4x4 QFN
(Pb-free)
®
PACKAGE
1
, and V
Data Sheet
ON
sequencing. The
TAPE &
REEL
13”
BOOST,
7”
-
MDP0046
MDP0046
MDP0046
DWG. #
V
PKG.
1-888-INTERSIL or 1-888-468-3774
OFF
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
,
Features
• 3.5A current limit FET options
• 3V to 5V input
• Up to 20V boost out
• 1% regulation on all outputs
• V
• Programmable sequence delay
• Fully fault protected
• Thermal shutdown
• Internal soft-start
• 20 Ld QFN packages
• Pb-Free plus anneal available (RoHS Compliant)
Applications
• LCD monitors (15”+)
• LCD-TV (up to 40”+)
• Notebook displays (up to 16”)
• Industrial/medical LCD displays
Pinout
V
BOOST
ON
sequence control
All other trademarks mentioned are the property of their respective owners.
March 9, 2006
|
/V
DRVP
DELB
CDLY
Intersil (and design) is a registered trademark of Intersil Americas Inc.
LX1
LX2
LOGIC
Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved
1
2
3
4
5
-V
OFF
(20 LD QFN)
TOP VIEW
-V
THERMAL
EL7585
ON
PAD
or V
LOGIC
15
14
13
12
11 FBN
-V
CINT
VREF
PGND
PGND
OFF
EL7585
FN7345.2
-V
BOOST
-

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EL7585ILZ-T13 Summary of contents

Page 1

... EL7585ILZ-T7 7585ILZ 20 Ld 4x4 QFN (Note) (Pb-free) EL7585ILZ-T13 7585ILZ 20 Ld 4x4 QFN (Note) (Pb-free) NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Absolute Maximum Ratings ( ...

Page 3

Electrical Specifications -40°C to 85°C, unless otherwise specified. (Continued) PARAMETER DESCRIPTION V LDO ON V FBP Regulation Voltage FBP V FBP Fault Trip Point F_FBP I FBP Input Bias Current FBP GMP FBP Effective Transconductance ...

Page 4

Electrical Specifications -40°C to 85°C, unless otherwise specified. (Continued) PARAMETER DESCRIPTION OT Over-temperature Threshold I PG Pull-down Current PG LOGIC ENABLE V Logic High Threshold HI V Logic Low Threshold LO I Logic Low bias ...

Page 5

Typical Performance Curves 100 =15V 0.1 0.2 0.3 I (A) OUT FIGURE 1. V EFFICIENCY AT V BOOST 100 =15V ...

Page 6

Typical Performance Curves =15V =12V 0.2 0.4 I (A) OUT FIGURE 7. V LOAD REGULATION AT V BOOST 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 0 ...

Page 7

Typical Performance Curves V CDLY V REF V BOOST V LOGIC TIME (10ms/DIV) FIGURE 13. START-UP SEQUENCE V BOOST-DELAY V LOGIC V OFF V ON TIME (10ms/DIV) FIGURE 15. START-UP SEQUENCE 7 EL7585 (Continued =220nF DLY C =220nF ...

Page 8

REFERENCE V REF GENERATOR SGND FBB GM AMPLIFIER C INT UVLO COMPARATOR THERMAL SHUTDOWN CDLY DRVN BUFFER FBN 0.4V Applications Information The EL7585 is a highly integrated multiple output power solution for TFT-LCD applications. The system consists ...

Page 9

Boost Converter The main boost converter is a current mode PWM converter at a fixed frequency of 1MHz which enables the use of low profile inductors and multilayer ceramic capacitors. This results in a compact, low cost power system for ...

Page 10

The following table gives typical values (margins are considered 10%, 3%, 20%, 10%, and 15 and I : OMAX TABLE 2. V (V) V (V) L (µH) (MHz 3.3 9 6.8 3.3 12 6.8 3.3 15 ...

Page 11

Operation of the DELB Output Function An open drain DELB output is provided to allow the boost output voltage, developed at C (see application diagram delayed via an external switch (Q4 time after the V ...

Page 12

The base-emitter saturation voltage is: Vbe_max = 1.25V (note this is normally a Vbe ~ 0.7V, however, for the Q5 transistor an internal Darlington arrangement is used to increase it's current gain, giving a 'base-emitter' voltage ...

Page 13

The LDO_OFF regulator uses an external NPN transistor as the pass element. The onboard LDO controller ...

Page 14

Discontinuous/Continuous Boost Operation and its Effect on the Charge Pumps The EL7585 V and V architecture uses LX switching ON OFF edges to drive diode charge pumps from which LDO regulators generate the V and V ON OFF appreciated that ...

Page 15

Typical fault thresholds for FBP, FBL, FBN and FBB are included in the tables. PG and DELB fault thresholds are typically 0.6V. C has an internal current-limited clamp to keep the INT voltage within its normal range INT ...

Page 16

EL7585 V CDLY EN V REF V BOOST LOGIC V OFF t DEL1 DELAYED V BOOST V ON START-UP SEQUENCE TIMED BY C FIGURE 26. START-UP SEQUENCE DEL2 DLY FN7345.2 March 9, 2006 ...

Page 17

Over-Temperature Protection An internal temperature sensor continuously monitors the die temperature. In the event that the die temperature exceeds the thermal trip point of 140°C, the device will shut down. Layout Recommendation The device's performance including efficiency, output noise, transient ...

Page 18

Typical Application Diagram Q NODE 1nF 10µ 0.22µF 4.7µF R 10Ω 4.7µ 10kΩ 0.1µF REF 41 NODE ...

Page 19

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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