CAT3661 Datasheet, PDF (1/12 Pages) ON Semiconductor – 1-Channel Low-Power LED Driver

CAT3661
1-Channel Low-Power LED
Driver
Description
The CAT3661 is a high efficiency low power fractional charge
pump that drives one LED with up to 5 mA of current. Soft−start
current limiting and short−circuit protection are optimized for use with
coin cell batteries.
Low noise input ripple and constant switching frequency allows the
use of small external ceramic capacitors. This makes the CAT3661
ideal for EMI sensitive applications. The charge pump supports a wide
range of input voltages from 2.0 V to 5.5 V.
The CAT3661 has a built−in circuitry to provide feedback to a
microcontroller of Open/Short LED and Low battery events. The Low
battery indicator trip point is internally fixed at 2.4 V. External
resistors can be added to raise or lower the trip voltage, if needed.
The device is packaged in the tiny 16−lead TQFN 3 mm x 3 mm
package with a max height of 0.8 mm.
The inclusion of a 1.33x fractional charge pump mode increases
device efficiency by up to 10% over traditional 1.5x tri−mode charge
pumps with no added external capacitors. The 1.33x charge pump with
two fly capacitors is a patented architecture exclusive to
ON Semiconductor.
Features
• Charge Pump: 1x, 1.33x, 1.5x, 2x
• Drives One LED up to 5 mA
• Optimized for Coin Cell Battery Operation
• Open/Short LED Fault Detection
• Adjustable Low Battery Detection
• Low Quiescent Current 150 mA Typical
• Power Efficiency up to 92%
• Low Noise Input Ripple in All Modes
• “Zero” Current Shutdown Mode
• Soft Start and Short Circuit Current Limiting
• Thermal Shutdown Protection
• 3 mm x 3 mm, 16−pad TQFN Package
• This Device is Pb−Free, Halogen Free/BFR Free and is RoHS
Compliant
Typical Applications
• Low Power LCD Display Backlight
• Low Power Handheld Device Backlight
http://onsemi.com
TQFN−16
HV3 SUFFIX
CASE 510AD
PIN CONNECTIONS
1
RSET
C1−
nFLTB
C1+
nFLTL
C2+
EN
C2−
(Top View)
See detailed description of the pins function on
page 8 of this data sheet.
MARKING DIAGRAM
JAAU
AXXX
YWW
JAAU = CAT3661HV3−GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digits)
ORDERING INFORMATION
See detailed ordering and shipping information on page 2 of
this data sheet.
© Semiconductor Components Industries, LLC, 2014
1
August, 2014 − Rev. 2
Publication Order Number:
CAT3661/D