CAT660EPA
100 MA CMOS Charge Pump Inverter/Doubler
Preliminary Information
CAT660
100mA CMOS Charge Pump Inverter/Doubler
FEATURES
ALOGEN FR LEA D F REETM
Replaces MAX660 and LTC 660
Converts V+ to V- or V+ to 2V+
Low output resistance, 4 typical s High power efficiency
Selectable charge pump frequency - 10kHz or 80kHz - Optimize capacitor size
Low quiescent current
Pin-compatible, high-current alternative to 7660/1044
Industrial temperature range
Available In 8-pin Soic, Dip And 0.8mm Thin 8pad Tdfn Packages - Lead-free, Halogen-free Package
option
Applications
Negative voltage generator s Voltage doubler s Voltage splitter
Low EMI power source s GaAs FET biasing s Lithium battery power supply
Instrumentation s LCD contrast bias s Cellular phones, pagers
Description
The Cat660 Is A Charge-pump Voltage Converter. It Will Invert A 1.5v To 5.5v Input To A -1.5v To
-5.5v Output. Only Two External Capacitors Are Needed. With A Guaranteed 100ma Output Current
Capability, The Cat660 Can Replace A Switching Regulator And Its Inductor. Lower Emi Is Achieved Due
to the absence of an inductor.
In Addition, The Cat660 Can Double A Voltage Supplied From A Battery Or Power Supply. Inputs From
2.5V to 5.5V will yield a doubled, 5V to 11V output voltage.
A Frequency Control Pin (boost/fc) Is Provided To Select Either A High (80khz) Or Low (10khz)
Internal Oscillator Frequency, Thus Allowing Quiescent Current Vs. Capacitor Size Trade-offs To Be
made. The 80kHz 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 Soic Packages Are Available In The Industrial Temperature Range. The Tdfn Package
has a 4x4mm footprint and
Features A 0.8mm Maximum Height. Compared To The 8-pin Soic The Tdfn Package Footprint Is Nearly 50%
less. For die availability, contact Catalyst Semiconductor marketing.
The Cat660 Replaces The Max660 And The Ltc 660. In Addition, The Cat660 Is Pin Compatible With The
7660/ 1044, offering an easy upgrade for
Applications with 100mA loads.
TYPICAL
Application
+VIN 1.5V to 5.5V
1 BOOST/FC
2 CAP+