Intersil ISL98608 High efficiency power supply for small size display Datasheet

DATASHEET
To request the full datasheet, please visit www.intersil.com/products/ISL98608
High Efficiency Power Supply for Small Size Displays
ISL98608
Features
The ISL98608 is a high efficiency power supply for small size
displays, such as smart phones and tablets requiring ±supply
rails. It integrates a boost regulator, LDO and inverting charge
pump that are used to generate two output rails: +5.5V
(default) and -5.5V (default). The ±5.5V output voltages can be
adjusted from ±4.5V up to ±7V with 50mV steps using the I2C
interface.
• Two outputs:
- VP = +5.5V (default)
- VN = -5.5V (default)
The device integrates synchronous rectification MOSFETs for
the boost regulator and inverting charge pump, which
maximizes conversion efficiency.
• 18mm2 solution PCB area
• 2.5V to 5V input voltage range
• ±4.5 to ±7V wide output range
• >89% efficiency with 12mA load between VP and VN
• Fully integrated FETs for synchronous rectification
ISL98608 integrates all compensation and feedback
components, which minimizes BOM count and reduces the
solution PCB size to 18mm2.
• Integrated compensation and feedback circuits
The input voltage range, high efficiency operation and also
very low shutdown current make the device ideal for use in
single cell Li-ion battery operated applications.
• 1µA shutdown supply current
• I2C adjustable output voltages and settings
• Integrated VP/VN discharge resistors
• Programmable turn on and turn off sequencing
• 1.744mm x1.744mm, 4x4 array WLCSP with 0.4mm pitch
The ISL98608 is offered in a 1.744mm x1.744mm WLCSP
package, and the device is specified for operation across the
-40°C to +85°C ambient temperature range.
Applications
• TFT-LCD smart phone displays
• Small size/handheld displays
VIN
2.5V TO 5V
L1
VIN
CIN
LXP
SCL
VBSTCP
VBST
CVBST
CCP
CVN
-5.5V
LCD PANEL
CP
SDA
ENP
PROCESSOR
ENN
ISL98608
CN
VN
NEGATIVE SUPPLY
POSITIVE SUPPLY
+5.5V
VSUB
VP
AGND
PGND
CVP
FIGURE 1. TYPICAL APPLICATION CIRCUIT: TFT-LCD SMART PHONE DISPLAY
December 23, 2014
FN8711.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL98608
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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.
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