IS31PW3500 Datasheet, PDF (1/8 Pages) Integrated Silicon Solution, Inc – 1.1MHZ BOOST CONVERTER WITH 30V INTERNAL FET SWITCH

IS31PW3500
1.1MHZ BOOST CONVERTER WITH 30V INTERNAL FET SWITCH
February 2012
GENERAL DESCRIPTION
The IS31PW3500 is a constant current step-up
converter. The step-up converter topology allows
series connection of the white LEDs so the LED
currents are identical for uniform brightness as well as
constant output voltage to drive other devices. The
IS31PW3500 switches at 1.1MHz, allowing the use of
tiny external components. The input and output
capacitor can be as small as 1μF, saving space and
cost versus alternative solutions. A low 0.25V
feedback voltage minimizes power loss in the current
setting resistor for better efficiency. The IS31PW3500
is available in small DFN-8, 2mm × 2mm package.
FEATURES
 2.4V to 5.5V input range
 26V output with over voltage protection
 High efficiency :85 % typical
 PWM dimming control
 Internal high power 30V MOSFET switch
 Fast 1.1MHz switching frequency
 Small, low-profile inductors and capacitors
 DFN-8, 2mm × 2mm package
 RoHS compliant and 100% lead (Pb)-free
APPLICATIONS
 Mobile phone
 Digital still camera
 PDAs, handheld computers
 MP3 players
 GPS receivers
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circiut
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev.A, 12/30/2011