CAT660

Replaces MAX660 and LTC®660
Converts V+ to V- or V+ to 2V+
Low output resistance, 4Ω  typical
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 8-
padTDFN packages
    - Lead-free, halogen-free package option

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

V+ to GND.........................................................................6V
Input Voltage (Pins 1, 6 and 7)..-0.3V to (V+ + 0.3V)
BOOST/FC and OSC Input Voltage.........................The least
negative of (Out - 0.3V) or (V+ - 6V) to (V+ + 0.3V)
Output Short-circuit Duration to GND...........................1 sec.
(OUT may be shorted to GND for 1 sec without damage but
shorting OUT to V+ should be avoided.)
Continuous Power Dissipation (T_A = 70°C)
Plastic DIP.................................................................730mW
SOIC..........................................................................500mW
TDFN................................................................................1W

Storage Temperature.................................-65°C to 160°C
Lead Soldering Temperature (10 sec)........................300°C

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 toV+. The operating frequency can also be adjusted with an external capacitor at the OSC pin or by driving OSC with an external clock. CAT660 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 footprintis 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 with100mA loads.