CAT37_05 Datasheet, PDF (11/12 Pages) Catalyst Semiconductor – CMOS White LED Driver Boost Converter

CAT37
REVISION HISTORY
Date
9/25/2003
Rev.
H
9/25/2003
I
11/6/2003
J
12/8/2003
K
12/10/2003 L
12/18/2003 M
12/22/2003 N
6/9/2004
O
6/15/2004
P
9/22/2004
Q
11/1/2004
R
07/07/2005 S
Reason
Updated Ordering Information - part numers
Changed L1 for each figure from 22 µH to 6.8 µH
Changed VIN for Typical Application from 2.7V to 4.2 Vto 3V to 5V
Changed C1 for each typical application circuit from 4.7 µF to 1 µF
Changed C2 for each typical application circuit from 2.2 µF to 1 µF
Changed VIN for each for each typical application circuit from
1.8 V to 3 V to 3 V to 4.2 V
Updated Ordering Information - part numbers
Updated Features
Changed R1 for Typical Application figure and Typical Application
Circuit figures from 6.34Ω to 6.8Ω
Updated Description (2V to 2.5V input supply voltage)
Updated Ordering Information (added package marking code)
Updated Electrical Specifications
Updated Table 4 (R1 Resistor Value) with new values
Updated LED dimming with logic signal (0.095V to 0.105V)
Updated Typical Application figures
Updated Electrical Specifications
Updated Operation text
Updated LED current programming text
Updated Table 4 (R1 Resistor Value) with new values
Updated LED dimming equations
Updated Typical Application Circuit figures
Updated FB Pin Leakage Current in Electrical Specifications
Added Typical Characteristics graphs (pages 4-6)
Added Efficiency graphs to Typical Application Circuits
Changed package drawing for 5-lead SOT-23
Updated Absolute Maximum Ratings
Deleted temp range from Electrical Specifications
Added Recommended Operating Conditions
Updated Block Diagram
Updated Electrical Specifications (changed VRSET to VFB in IQ
Reoved Preliminary data sheet designation
Added Green Packages in all areas
Eliminated TDFN (3x4.9mm) package
Updated Ordering Information
Update Features
Update Description
Update Ordering Information
Update Pin Configuration
Update Pin Description
Update Block Diagram
Update Package Outlines
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc No. 5005, Rev. S