TCM828VT MICROCHIP [Microchip Technology], TCM828VT Datasheet

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TCM828VT

Manufacturer Part Number
TCM828VT
Description
Switched Capacitor Voltage Converters
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
Features
• Charge Pump in 5-Pin SOT-23 Package
• >95% Voltage Conversion Efficiency
• Voltage Inversion and/or Doubling
• Low 50 µA (TCM828) Quiescent Current
• Operates from +1.5V to +5.5V
• Up to 25 mA Output Current
• Only Two External Capacitors Required
Applications
• LCD Panel Bias
• Cellular Phones
• Pagers
• PDAs, Portable Dataloggers
• Battery-Powered Devices
Typical Application Circuit
© 2010 Microchip Technology Inc.
C1
Voltage Inverter
GND
C
C
+
-
Switched Capacitor Voltage Converters
OUT
V
IN
C
2
OUTPUT
INPUT
TCM828/TCM829
V
-
Description
The TCM828/TCM829 devices are CMOS “charge-
pump” voltage converters in ultra-small, 5-Pin SOT-23
packages. They invert and/or double an input voltage
which can range from +1.5V to +5.5V. Conversion
efficiency is typically >95%. Switching frequency is
12 kHz for the TCM828, and 35 kHz for the TCM829.
External component requirement is only two capacitors
(3.3 µF
applications. With a few additional components, a
positive doubler can also be built. All other circuitry,
including control, oscillator and power MOSFETs, are
integrated on-chip. Supply current is 50 µA (TCM828)
and 115 µA (TCM829).
The TCM828 and TCM829 devices are available in a
5-Pin SOT-23 surface mount package.
Package Type
Ordering Information
TCM828ECT
TCM828VT
TCM829ECT
Note:
Part No.
OUT
nominal)
V
C
5-Pin SOT-23 is equivalent to EIAJ
SC-74A.
IN
-
1
2
3
TCM828/TCM829
5-Pin SOT-23
5-Pin SOT-23
5-Pin SOT-23
for
SOT-23
Package
standard
5
4
-40°C to +125°C
voltage
-40°C to +85°C
-40°C to +85°C
DS21488B-page 1
Temperature
C
GND
+
Range
inverter

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TCM828VT Summary of contents

Page 1

... The TCM828 and TCM829 devices are available in a 5-Pin SOT-23 surface mount package. Package Type INPUT OUT OUTPUT - Ordering Information Part No. TCM828ECT TCM828VT TCM829ECT Note: 5-Pin SOT-23 is equivalent to EIAJ SC-74A. for standard voltage inverter TCM828/TCM829 SOT- ...

Page 2

TCM828/TCM829 NOTES: DS21488B-page 2 © 2010 Microchip Technology Inc. ...

Page 3

ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Input Voltage (V to GND) .................................. +30V IN Output Voltage (OUT to GND) ...................6.0V, +0.3V Current at OUT Pin ............................................ 50 mA Short-Circuit Duration – OUT to GND ............Indefinite Operating Temperature Range ................ ...

Page 4

TCM828/TCM829 NOTES: DS21488B-page 4 © 2010 Microchip Technology Inc. ...

Page 5

TYPICAL CHARACTERISTICS Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. ...

Page 6

TCM828/TCM829 Note:Circuit of Figure 5- +5V C3 450 400 V = 4.75V – 4.0V IN OUT 350 300 V = 3.15V – 2.5V IN OUT 250 200 V ...

Page 7

Note: Circuit of Figure 5- +5V C3 100 =1. OUTPUT CURRENT (mA) FIGURE ...

Page 8

TCM828/TCM829 NOTES: DS21488B-page 8 © 2010 Microchip Technology Inc. ...

Page 9

PIN DESCRIPTION The descriptions of the pins are listed in TABLE 3-1: PIN FUNCTION TABLE TCM828/TCM829 Symbol SOT-23 1 OUT GND + © 2010 Microchip Technology Inc. TCM828/TCM829 ...

Page 10

TCM828/TCM829 NOTES: DS21488B-page 10 © 2010 Microchip Technology Inc. ...

Page 11

DETAILED DESCRIPTION The TCM828/TCM829 charge pump converters invert the voltage applied to the V pin. Conversion consists two phase operation (Figure 4-1). During the first phase, switches S2 and S4 are open, while S1 and S3 ...

Page 12

TCM828/TCM829 NOTES: DS21488B-page 12 © 2010 Microchip Technology Inc. ...

Page 13

APPLICATIONS INFORMATION 5.0.1 OUTPUT VOLTAGE CONSIDERATIONS The TCM828/TCM829 devices perform conversion, but do not provide regulation. The output voltage will droop in a linear manner with respect to load current. The value of this equivalent output resistance is approximately ...

Page 14

TCM828/TCM829 5.0.3 CAPACITOR SELECTION In order to maintain the lowest output resistance and output ripple voltage recommended that low ESR capacitors be used. Additionally, larger values of C1 will lower the output resistance and larger values of C2 ...

Page 15

PARALLELING DEVICES To reduce the value multiple TCM828/ OUT TCM829 devices can be connected in parallel (Figure 5-5). The output resistance will be reduced by a factor of N, where N is the number of TCM828/ ...

Page 16

TCM828/TCM829 NOTES: DS21488B-page 16 © 2010 Microchip Technology Inc. ...

Page 17

... PACKAGING INFORMATION 6.1 Package Marking Information 5-Lead SOT-23 TCM828ECT728 XXNN TCM828VT713 TCM829ECT713-GVAO Legend: XX...X Customer-specific information Y Year code (last digit of calendar year) YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) NNN Alphanumeric traceability code e 3 Pb-free JEDEC designator for Matte Tin (Sn) * This package is Pb-free ...

Page 18

TCM828/TCM829 User Direction of Feed Device Marking PIN 1 Standard Reel Component Orientation TR Suffix Device (Mark Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size Package 5-Pin SOT-23 FIGURE 6-1: Component Taping Orientation for 5-Pin ...

Page 19

1RWHV © 2010 Microchip Technology Inc. TCM828/TCM829 @ φ DS21488B-page 19 ...

Page 20

TCM828/TCM829 5-Lead Plastic Small Outline Transistor (CT) [SOT-23] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS21488B-page 20 © 2010 Microchip Technology Inc. ...

Page 21

... APPENDIX A: REVISION HISTORY Revision B (August 2010) The following is the list of modifications: 1. Added new operating temperature for TCM828 (TCM828VT). 2. Reformatted the original document. 3. Updated package drawings. Revision A (March 2001) • Original Release of this Document. © 2010 Microchip Technology Inc. TCM828/TCM829 DS21488B-page 21 ...

Page 22

TCM828/TCM829 NOTES: DS21488B-page 22 © 2010 Microchip Technology Inc. ...

Page 23

... CMOS Voltage Converter. Temperature Range -40°C to +85° -40°C to +125°C Package 5-Lead Plastic Small Outline Transistor, SOT-23. © 2010 Microchip Technology Inc. TCM828/TCM829 . Examples: a) TCM828ECT728: Extended Temp., 5-LD SOT-23 Package. b) TCM828VT713: Various Temperature 5-LD SOT-23 Package. c) TCM829ECT713-GVAO: Extended Temp., 5-LD SOT-23 Package. DS21488B-page 23 ...

Page 24

TCM828/TCM829 NOTES: DS21488B-page 24 © 2010 Microchip Technology Inc. ...

Page 25

Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families ...

Page 26

W ORLDWIDE AMERICAS ASIA/PACIFIC Corporate Office Asia Pacific Office 2355 West Chandler Blvd. Suites 3707-14, 37th Floor Chandler, AZ 85224-6199 Tower 6, The Gateway Tel: 480-792-7200 Harbour City, Kowloon Fax: 480-792-7277 Hong Kong Technical Support: Tel: 852-2401-1200 http://support.microchip.com Fax: 852-2401-3431 ...

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