TJ7660

Charge Pump Voltage Converters FEATURES Simple Conversion of +5V Logic Supply to ±5V Supplies Simple Voltage Multiplication (VOUT = (-) nVIN) Typical Open Circuit Voltage Conversion Efficiency 99.9% Typical Power Efficiency 98% Wide Operating Voltage Range- TJ7660 1.5V to 10.0V Easy to Use - Requires Only 2 External Non-Critical Passive Components No External Diode Over Full Temp. and Voltage Range TJ7660 SOP-8 PKG DIP-8 PKG APPLICATION On Board Negative Supply for Dynamic RAMs Localized µProcessor (8080 Type) Negative Supplies Inexpensive Negative Supplies Data Acquisition Systems < Pin Configuration ORDERING INFORMATION Device www.DataSheet4U.com Package SOP-8 D I P-8 TJ7660D TJ7660N DESCRIPTION The HTC TJ7660 is a monolithic CMOS power supply circuit which offers unique performance advantages over previously available devices. The TJ7660 performs supply voltage conversions from positive to negative for an input range of +1.5V to +10.0V resulting in complementary output voltages of -1.5V to -10.0V. Only 2 noncritical external capacitors are needed for the charge pump and charge reservoir functions. The TJ7660 can also be connected to function as voltage doublers and will generate output voltages up to +18.6V with a +10V input. Contained on the chip are a series DC supply regulator, RC oscillator, voltage level translator, and four output power MOS switches. A unique logic element senses the most negative voltage in the device and ensures that ...