TC7660_02 Datasheet, PDF (1/18 Pages) Microchip Technology – Charge Pump DC-to-DC Voltage Converter

M
TC7660
Charge Pump DC-to-DC Voltage Converter
Features
• Wide Input Voltage Range: +1.5V to +10V
• Efficient Voltage Conversion (99.9%, typ)
• Excellent Power Efficiency (98%, typ)
• Low Power Consumption: 80 µA (typ) @ V_IN = 5V
• Low Cost and Easy to Use
- Only Two External Capacitors Required
• Available in 8-Pin Small Outline (SOIC), 8-Pin
PDIP and 8-Pin CERDIP Packages
• Improved ESD Protection (3 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
Functional Block Diagram
Package Types
PDIP/CERDIP/SOIC
NC 1
CAP⁺ 2
GND 3
CAP^- 4
TC7660
8 V⁺
7 OSC
6
LOW
VOLTAGE (LV)
5 V_OUT
General Description
The TC7660 is a pin-compatible replacement for the
industry standard 7660 charge pump voltage
converter. It converts a +1.5V to +10V input to a
corresponding -1.5V to -10V output using only two low
cost capacitors, eliminating inductors and their
associated cost, size and electromagnetic interference
(EMI).
The on-board oscillator operates at a nominal
frequency of 10 kHz. Operation below 10 kHz (for
lower supply current applications) is possible by
connecting an external capacitor from OSC to ground.
The TC7660 is available in 8-Pin PDIP, 8-Pin Small
Outline (SOIC) and 8-Pin CERDIP packages in
commercial and extended temperature ranges.
V⁺ CAP⁺
82
OSC ⁷
6
LV
RC
Oscillator
÷2
Inntteerrnnaal l
VVooltltaaggee
RReegguulalatotror
TC7660
Voltage
Level
Translator
3
GND
4 _CAP-
5 _VOUT
Logic
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 2002 Microchip Technology Inc.
DS21465B-page 1