CAT661 Datasheet, PDF (1/16 Pages) Catalyst Semiconductor – High Frequency 100mA CMOS Charge Pump, Inverter/Doubler

CAT661
High Frequency 100 mA
CMOS Charge Pump,
Inverter/Doubler
Description
The CAT661 is a charge−pump voltage converter. It can invert a
positive input voltage to a negative output. Only two external
capacitors are needed. With a guaranteed 100 mA output current
capability, the CAT661 can replace a switching regulator and its
inductor. Lower EMI is achieved due to the absence of an inductor.
In addition, the CAT661 can double a voltage supplied from a
battery or power supply. Inputs from 2.5 V to 5.5 V will yield a
doubled, 5 V to 11 V output.
A Frequency Control pin (BOOST/FC) is provided to select either a
high (typically 135 kHz) or low (25 kHz) internal oscillator frequency,
thus allowing quiescent current vs. capacitor size trade−offs to be made.
The 135 kHz frequency is selected when the FC pin is connected to V+.
The operating frequency can also be adjusted with an external capacitor
at the OSC pin or by driving OSC with an external clock.
Both 8−pin DIP and SO packages are available. For die availability,
contact ON Semiconductor marketing.
The CAT661 can replace the MAX660 and the LTC660 in applications
where higher oscillator frequency and smaller capacitors are needed. In
addition, the CAT661 is pin compatible with the 7660/1044, offering an
easy upgrade for applications with 100 mA loads.
Features
• Converts V+ to V− or V+ to 2V+
• Low Output Resistance, 10 W Max.
• High Power Efficiency
• Selectable Charge Pump Frequency of 25 kHz or 135 kHz;
Optimize Capacitor Size
• Low Quiescent Current
• Pin−compatible to MAX660, LTC660 with Higher Frequency
Operation
• Available in 8−pin SOIC and DIP Packages
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Negative Voltage Generator
• Voltage Doubler
• Voltage Splitter
• Low EMI Power Source
• GaAs FET Biasing
• Lithium Battery Power Supply
• Instrumentation
• LCD Contrast Bias
• Cellular Phones, Pagers
© Semiconductor Components Industries, LLC, 2010
1
May, 2010 − Rev. 11
http://onsemi.com
SOIC−8
V SUFFIX
CASE 751BD
PDIP−8
L SUFFIX
CASE 646AA
PIN CONFIGURATION
1
BOOST/FC
V+
CAP+
OSC
GND
LV
CAP−
OUT
(Top View)
MARKING DIAGRAMS
661ELA
661EVA
661ELA = CAT661ELA
661EVA = CAT661EVA or
660EVA = CAT661EVA−T3
ORDERING INFORMATION
Device
Package Shipping
CAT661ELA
CAT661EVA
PDIP−8
(Pb−Free)
SOIC−8
(Pb−Free)
50 / Tube
100 / Tube
CAT661EVA−T3
SOIC−8
3,000 /
(Pb−Free) Tape & Reel
Publication Order Number:
CAT661/D