tc7660eoag Microchip Technology Inc., tc7660eoag Datasheet

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tc7660eoag

Manufacturer Part Number
tc7660eoag
Description
Charge Pump Dc-to-dc Voltage Converter
Manufacturer
Microchip Technology Inc.
Datasheet
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
• Low Cost and Easy to Use
• Available in 8-Pin Small Outline (SOIC), 8-Pin
• Improved ESD Protection (3 kV HBM)
• No External Diode Required for High-Voltage
Applications
• RS-232 Negative Power Supply
• Simple Conversion of +5V to ±5V Supplies
• Voltage Multiplication V
• Negative Supplies for Data Acquisition Systems
Functional Block Diagram
M
- Only Two External Capacitors Required
PDIP and 8-Pin CERDIP Packages
Operation
and Instrumentation
2002 Microchip Technology Inc.
OSC
LV
Charge Pump DC-to-DC Voltage Converter
7
6
TC7660
Oscillator
OUT
RC
= ± n V
Regulator
Regulator
Internal
Internal
Voltage
Voltage
+
2
IN
= 5V
Translator
Voltage
Level
GND
3
Package Types
General Description
The TC7660 is a pin-compatible replacement for the
industry
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.
8
V
+
PDIP/CERDIP/SOIC
CAP
2
+
CAP
CAP
standard
GND
NC
+
-
1
2
3
4
TC7660
7660
TC7660
Network
Logic
charge
8
7
6
5
4
5
V
OSC
LOW
VOLTAGE (LV)
V
+
OUT
DS21465B-page 1
pump
CAP-
V
OUT
voltage

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tc7660eoag Summary of contents

Page 1

... RC OSC Oscillator 6 LV Internal Internal Voltage Voltage Regulator Regulator TC7660 2002 Microchip Technology Inc. Package Types PDIP/CERDIP/SOIC = 5V IN CAP GND CAP General Description The TC7660 is a pin-compatible replacement for the industry standard converter. It converts a +1.5V to +10V input to a corresponding -1.5V to -10V output using only two low ...

Page 2

... LV Open Max GND A L =20 mA +25°C A =20 mA, T +70°C (C Device) A =20 mA, T +85°C (E and I Device) A =20 mA, T +125°C (M Device mA GND OUT T +70° mA GND OUT T +125°C (M Device) A 2002 Microchip Technology Inc. ...

Page 3

... SUPPLY VOLTAGE (V) FIGURE 2-2: Output Source Resistance vs. Supply Voltage. 10k +5V 1k 100 100 1000 OSCILLATOR CAPACITANCE (pF) FIGURE 2-3: Frequency of Oscillation vs. Oscillator Capacitance. 2002 Microchip Technology Inc µF, ESR = ESR = 100 FIGURE 2-4: Efficiency vs. Oscillator Frequency. ...

Page 4

... FIGURE 2-11: Conversion Efficiency vs. Load Current 25°C. See Figure 1- +5V SLOPE LOAD CURRENT (mA) Output Voltage vs. Load 100 + LOAD CURRENT (mA) Supply Current and Power 2002 Microchip Technology Inc. ...

Page 5

... During the second half of the switching cycle, charge is restored to the charge pump output capacitor recommended that a low ESR (equivalent series resistance) capacitor be used. Additionally, larger values will lower the output ripple. 2002 Microchip Technology Inc. Description + ) 3.5 Low Voltage Pin (LV) The low voltage pin ensures proper operation of the internal oscillator for input voltages below 3 ...

Page 6

... equivalent series resistance when a voltage difference between the LOAD OUT ESR ESR Non-Ideal Switched OUT DD 2002 Microchip Technology Inc. ...

Page 7

... for 1.5V OUT FIGURE 5-3: Increased Output Voltage By Cascading Devices. 2002 Microchip Technology Inc. 5.2 Paralleling Devices To reduce the value of R converters can be connected in parallel (Figure 5-2). The output resistance will be reduced by approximately a factor of n, where n is the number of devices connected in parallel. ...

Page 8

... producing an output voltage – OUT Positive Voltage Multiplier. , plus the two diodes, perform the posi- and C are 1 2 and C are 3 4 2002 Microchip Technology Inc ...

Page 9

... Figure 5-8 can be used to "force" the internal regulator on OUT TC7660 µ input FIGURE 5-8: Positive Voltage Conversion. 2002 Microchip Technology Inc. V OUT + = - OUT + ( forwards µF TC7660 ...

Page 10

... Standard marking consists of Microchip part number, year code, week code, traceability code (facility code, mask rev#, and assembly code). For marking beyond this, certain price adders apply. Please check with your Microchip Sales Office. DS21465B-page 10 Example: TC7660 CPA061 0221 Example: TC7660 MJA061 0221 Example: TC7660 COA0221 061 2002 Microchip Technology Inc. ...

Page 11

... Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MS-001 Drawing No. C04-018 2002 Microchip Technology Inc ...

Page 12

... TC7660 8-Lead Ceramic Dual In-line – 300 mil (CERDIP) Packaging diagram not available at this time. DS21465B-page 12 2002 Microchip Technology Inc. ...

Page 13

... Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MS-012 Drawing No. C04-057 2002 Microchip Technology Inc ...

Page 14

... TC7660 NOTES: DS21465B-page 14 2002 Microchip Technology Inc. ...

Page 15

... The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2002 Microchip Technology Inc. TC7660 Examples: a) TC7660COA: Commercial Temp ...

Page 16

... TC7660 NOTES: DS21465B-page 16 2002 Microchip Technology Inc. ...

Page 17

... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, K MPLAB, PIC, PICmicro, PICSTART and PRO MATE are registered trademarks of Microchip Technology Incorporated in the U ...

Page 18

... Centro Direzionale Colleoni Palazzo Taurus Colleoni 1 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Microchip Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 11/15/02 2002 Microchip Technology Inc. ...

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