n Ideal for CCD, LCD, LED Backlight and OLED
n Easy Generation of 15V (50mA), –8V (100mA) and
20V (20mA) from a Li-Ion Cell
n VVIN Range: 2.5V to 6V
n Wide Output Ranges: Up to 32V for the Boosts and
Up to –32V for the Inverter
n Output Disconnect for the Boost Channels
n Boost3 Allows Voltage Programming and/or Current
Programming for a ‘One Wire Current Source’
n Overload Fault Protection with Fault I/O Pin Indicator
n Combined Soft-Start and Enable Pins
n Small 20-Pin 3mm × 3mm QFN Package
n Digital Still and Video Cameras
n Scanner and Display Systems
n PDA, Cellular Phones and Handheld Computers
n LED Backlight and OLED Display Drivers
n CCD Imager Bias
n General High Voltage Supply Bias
High Voltage Monolithic
Inverter and Dual Boost
The LT®3587 provides a one chip solution for applications
requiring two positive and one negative high voltage sup-
plies. The LT3587 input voltage range of 2.5V to 6V makes
it ideal for various battery-powered systems.
A single resistor programs each of the three output voltage
levels and the output current of Boost3. The intelligent soft-
start allows for sequential soft-start of the Boost1 output
followed by the negative output with a single capacitor.
Internal sequencing circuitry also disables the inverter until
the Boost1 output has reached 87% of its ﬁnal value.
The LT3587 integrates all the power switches, soft-start,
and output-disconnect circuits into a small 3mm × 3mm
QFN package. This high level of integration combined
with small external components makes the LT3587 ideal
for space constrained applications.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Li-Ion Powered Supply for CCD Imager and Six White Backlight LEDs
2.5V TO 6V
2.5V TO 6V
20mA, UP TO 6 LEDS
90 CDD+ = 50mA
85 CDD– = 100mA
LED = 20mA
75 ALL CHANNELS
60 ALL CHANNELS