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5 Channel DC/DC Converter + VON Slice + Power-Good
ISL98603
Features
The ISL98603 represents a high power, integrated LCD supply IC
targeted at large panel LCD displays. The ISL98603 integrates a
high power boost converter for AVDD generation, VON and VOFF
charge pump drivers, one synchronous buck regulator, and one
synchronous buck controller for 2 logic voltages. The VON slicing
circuitry and power-good function are also included.
• 9.5V to 15.0V Input Supply
• 1.3MHz Switching Frequency
• 5.0A Integrated Boost for Up to 19V AVDD
• VON Charge Pump, Up to 36V and 120mA
• VOFF Charge Pump, Down to -10V and 120mA
Operating at 1.3MHz, the AVDD boost converter features a 5.0A
boost FET. Feedback is taken from the far side of the delay FET for
improving regulation. The OVP circuit protects output side
components.
• Synchronous Buck1 for 3.3V/2.5V with 2.0A Peak FET
The logic synchronous buck converter features two 2.3A FETs
operating at 1.3MHz internal clock. The output voltage is set by
the IC internally or feedback resistor. The soft-start circuitry are
also integrated with the buck.
• VON Slice Function Integrated
• Synchronous Buck2 Controller Output from 0.9V to 2.0V
• AVDD Delay Switch Capable of Soft-starting into a Highly
Capacitive, Heavy Load
• Power-Good Function for TCON Enable
• Automatic Start-Up Sequencing
• UVLO, UVP, OVP, OCP, and OTP Protection
The second logic voltage is generated from synchronous buck
converter with MOSFET controllers. The overcurrent protection is
also integrated with the buck.
• 40 Ld 6x6 QFN
• Specified for Ambient Operation Over the -40°C to +85°C
Temperature Range
The charge pump of VON and VOFF use the full switching
frequency and integrates the driver for high current capability.
VON is further processed through an integrated VON Slice circuit in
order to reduce flicker.
• Pb- Free (RoHS Compliant)
Applications
• LCD TV
Alternative fixed voltages at the boost, Buck1, Buck2, VON charge
pump, and VOFF charge pump are available in ISL98603.
Pin Configuration
January 12, 2012
FN7899.1
1
SW2
SW1
NC
PGND4
38
37
36
35
34
PVIN2
SWIN
39
PGND3
SWOUT
40
FBB
AVDD
ISL98603
40 LD 6x6 QFN
TOP VIEW
33
32
31
FBN
1
30
PVIN1
AGND
2
29
NC
REF
3
28
PHASE1
COMP
4
27
EN
SUPN
5
26
PGND2
DRVN
6
25
COMPB1
PGND1
7
24
VDC
DRVP
8
23
LGATE
SUPP
9
22
NC
FBP
10
21
UGATE
11
12
13
14
15
16
17
18
19
20
GHON
GHC
GHD
YV1C
COMPB2
FBB2
CPG
BOOT
NC
PHASE2
THERMAL
PAD
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011, 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners
ISL98603
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
2
FN7899.1
January 12, 2012