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TC7660 Fiches technique(PDF) 1 Page - Microchip Technology

No de pièce TC7660
Description  Charge Pump DC-to-DC Voltage Converter
Download  18 Pages
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC7660 Fiches technique(HTML) 1 Page - Microchip Technology

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 2002 Microchip Technology Inc.
DS21465B-page 1
M
TC7660
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) @ VIN = 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 VOUT = ± n V+
• Negative Supplies for Data Acquisition Systems
and Instrumentation
Package Types
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.
Functional Block Diagram
1
2
3
4
8
7
6
5
TC7660
NC
CAP+
GND
CAP-
VOUT
LOW
VOLTAGE (LV)
OSC
PDIP/CERDIP/SOIC
V+
TC7660
GND
Internal
Voltage
Regulator
RC
Oscillator
Voltage
Level
Translator
V+ CAP+
82
7
6
OSC
LV
3
Logic
Network
VOUT
5
CAP-
4
÷ 2
Internal
Voltage
Regulator
Charge Pump DC-to-DC Voltage Converter


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