TC7660S_15 Datasheet, PDF (1/24 Pages) Microchip Technology – SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER

TC7660S
Super Charge Pump DC-to-DC Voltage Converter
Features
• Oscillator boost from 10 kHz to 45 kHz
• Converts +5V Logic Supply to ±5V System
• Wide Input Voltage Range: +1.5V to +12V
• Efficient Voltage Conversion (99.9%, typical)
• Excellent Power Efficiency (98%, typical)
• Low PowerConsumption:80 µA(typical)@V_IN=5V
• Low Cost and Easy to Use
- Only Two External Capacitors Required
• Available in 8-Pin Small Outline (SOIC) and 8-Pin
PDIP Packages
• Improved ESD Protection (10 kV HBM)
• No External Diode Required for High-Voltage
Operation
Applications
• RS-232 Negative Power Supply
• Simple Conversion of +5V to ±5V Supplies
• Voltage Multiplication V_OUT = ± n V⁺
• Negative Supplies for Data Acquisition Systems
and Instrumentation
Package Types
PDIP/SOIC
BOOST 1
CAP⁺ 2
GND 3
CAP^- 4
TC7660S
8 V⁺
7 OSC
6
LOW
VOLTAGE (LV)
5 V_OUT
General Description
The TC7660S device is a pin-compatible replacement
for the industry standard 7660 charge pump voltage
converter. It converts a +1.5V to +12V input to a corre-
sponding -1.5V to -12V output using only two low-cost
capacitors, eliminating inductors and their associated
cost, size and electromagnetic interference (EMI).
Added features include an extended supply range to
12V, and a frequency boost pin for higher operating fre-
quency, allowing the use of smaller external capacitors.
The on-board oscillator operates at a nominal fre-
quency of 10 kHz. Frequency is increased to 45 kHz
when pin 1 is connected to V⁺. Operation below 10 kHz
(for lower supply current applications) is possible by
connecting an external capacitor from OSC to ground
(with pin 1 open).
The TC7660S is available in 8-Pin PDIP and 8-Pin
Small Outline (SOIC) packages in commercial and
extended temperature ranges.
 2001-2015 Microchip Technology Inc.
DS20001467C-page 1