TC3683EUART [MICROCHIP]
SWITCHED CAPACITOR CONVERTER, 45.5 kHz SWITCHING FREQ-MAX, PDSO8, MSOP-8;
| 型号： | TC3683EUART |
| 厂家： | 
MICROCHIP |
| 描述： | SWITCHED CAPACITOR CONVERTER, 45.5 kHz SWITCHING FREQ-MAX, PDSO8, MSOP-8 开关 光电二极管 |
| 文件： | 总7页 (文件大小：960K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC3682
TC3683
TC3684
Inverting Charge Pump Voltage Doublers with Active Low Shutdown
FEATURES
GENERAL DESCRIPTION
■ Small 8-Pin MSOP Package
■ Operation from 1.8V to 5.5V
The TC3682, TC3683 and TC3684 are CMOS charge
pump converters that provide an inverted doubled output
from a single positive supply. An on-board oscillator pro-
vides the clock and only three external capacitors are
required for full circuit implementation. Switching frequen-
cies are 12kHz for the TC3682, 35kHz for the TC3683, and
125kHz for the TC3684. When the SHDN pin is held at a
logic low, the device goes into a very low power mode of
operation consuming less than 1µA(typ.) of supply current.
Low output source impedance (typically 120Ω), pro-
vides output current up to 10mA. The TC3682, TC3683 and
TC3684 feature a 1.8V to 5.5V operating voltage range and
high efficiency, which make them an ideal choice for a wide
variety of applications requiring a negative doubled voltage
derived from a single positive supply (for example: genera-
tion of -7.2V from a +3.6V lithium cell or –10V generated
from a +5V logic supply).
■ 120 Ohms (typ.) Output Resistance
■ 99% Voltage Conversion Efficiency
■ Only 3 External Capacitors Required
■ Power-Saving Shutdown Mode
■ Low Active Supply Current
......................... 95µA (typ.) for TC3682
..........................225µA (typ.) for TC3683
..........................700µA (typ.) for TC3684
■ Fully Compatible with 1.8V Logic Systems
TYPICAL APPLICATIONS
■ LCD Panel Bias
■ Cellular Phones PA Bias
■ Pagers
■ PDAs, Portable Data Loggers
■ Battery Powered Devices
The minimum external parts count, small physical size,
and shutdown mode make this family of products useful for
a wide variety of negative bias power supply applications.
TYPICAL OPERATING CIRCUIT
ORDERING INFORMATION
Part No.
Package
Osc Freq (kHz) Temp. Range
TC3682EUA
TC3683EUA
TC3684EUA
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
12
35
125
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +85°C
C1+
V
+
INPUT
ON
IN
C1
TC3682
TC3683
TC3684
C1–
C2+
SHDN
PIN CONFIGURATION
OFF
+
C2
C2–
GND
8-Pin MSOP
V
= -(2xV )
OUT
IN
V
OUT
1
2
3
4
C1-
C2+
SHDN
8
7
6
5
–
C
OUT
TC3682
TC3683
TC3684
+
C1+
VIN
C2-
Notes: 1) C1 must have a voltage rating greater
than or equal to VIN
2) C2 and COUT
VOUT
GND
must have a voltage rating greater
than or equal to 2VIN
TC3682/3/4-1 8/14/00
2001 Microchip Technology Inc. DS21556A
Inverting Charge Pump Voltage
Doublers with Active Low Shutdown
TC3682
TC3683
TC3684
Power Dissipation (TA ≤ 70°C) 8-Pin MSOP ............... 320mW
Storage Temperature (Unbiased) ......... - 65 °C to +150°C
Lead Temperature (Soldering, 10sec) .................. +260°C
ABSOLUTE MAXIMUM RATINGS*
Input Voltage (VIN to GND) ......................... +6.0V, - 0.3V
Output Voltage (VOUT to GND) ................. -12.0V, + 0.3V
Current at VOUT Pin ................................................ 20mA
Short-Circuit Duration VOUT to GND ...................Indefinite
Operating Temperature Range ............... -40°C to +85°C
*This is a stress rating only and functional operation of the device at these
or any other conditions above those indicated in the operational sections of
the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS: TA = -40°C to +85°C, VIN = + 5V, C1 = C2 = 3.3µF (TC3682); C1 = C2 =
1µF (TC3683); C1 = C2 = 0.33µF (TC3684); SHDN = GND, unless otherwise noted. Typical values are at TA = +25°C
Symbol Parameter
Device
Test Conditions
Min
Typ
Max
Unit
IDD
Supply Current
TC3682
TC3683
TC3684
SHDN = VIN
SHDN = VIN
SHDN = VIN
—
—
—
95
225
700
160
480
1500
µA
ISHDN
VMIN
Shutdown Supply Current
Minimum Supply Voltage
Maximum Supply Voltage
Oscillator Frequency
All
All
All
SHDN = GND, VIN = +5V
RLOAD = 1kΩ
—
1.8
—
0.5
—
2
µA
V
—
VMAX
FOSC
RLOAD = 1kΩ
—
5.5
V
TC3682
TC3683
TC3684
8.4
24.5
65
12
35
125
15.6
45.5
170
kHz
VIH
VIL
Shutdown Input
Logic High
All
VIN = VMIN to VMAX
VIN = VMIN to VMAX
1.4
—
—
—
V
V
Shutdown Input
Logic Low
All
—
0.4
VEFF
ROUT
TWK
Voltage Conversion Efficiency
Output Resistance
All
All
RLOAD = ∞
ILOAD = 0.5mA to10mA
95
—
99
—
V
120
170
Ω
Wake-Up Time From
Shutdown Mode
TC3682
TC3683
TC3684
RLOAD = 2kΩ
—
—
—
1800
600
200
—
—
—
µsec
NOTES: 1. Capacitor contribution is approximately 20% of the output impedance (ESR = 1/pump frequency x capacitance)
PIN DESCRIPTION
Pin No.
Symbol
Description
1
2
3
4
5
6
7
8
C1–
C2+
C2–
C1 Commutation Capacitor Negative Terminal
C2 Commutation Capacitor Positive Terminal
C2 Commutation Capacitor Negative Terminal
Doubling Inverting Charge Pump Output (– 2 x VIN)
Ground
VOUT
GND
VIN
Positive Power Supply Input
C1+
C1 Commutation Capacitor Positive Terminal
Shutdown Input (Active Low)
SHDN
2
2001 Microchip Technology Inc. DS21556A
TC3682/3/4-1 8/14/00
Inverting Charge Pump Voltage
Doublers with Active Low Shutdown
TC3682
TC3683
TC3684
APPLICATIONS INFORMATION
DETAILED DESCRIPTION
Output Voltage Considerations
The TC3682, TC3683 and TC3684 charge pumps per-
form –2x multiplication of the voltage applied to the VIN pin.
Conversionisperformedusingtwo synchronousswitching
matrices and three external capacitors. When the shut-
down input is held at a logic low, both stages go into a very
low power mode of operation consuming less than 1µA of
supply current.
The TC3682, TC3683 and TC3684 perform inverting
voltage conversions but do not provide any type of regula-
tion. The output voltage will droop in a linear manner with
respect to the respective load currents. The value of the
equivalent output resistance of the ‘-VIN’ output is approxi-
mately 50
Ω
nominal at +25°C and VIN = +5V. The value of
nominal at
Figure1(below)isablockdiagramrepresentationofthe
TC3682,TC3683andTC3684architecture. Thefirstswitch-
ing stage inverts the voltage present at VIN and the second
stage uses ‘–VIN’ generated from the first stage to produce
the ‘–2x’ output function from the second stage switching matrix.
the ‘-2VIN’ output and is approximately 140
Ω
+25°C and VIN = +5V. In this particular case, ‘-VIN’ is
approximately – 5V and ‘–2VIN’ is approximately –10V at
very light loads, and each stage will droop according to the
equation below:
Each device contains an on-board oscillator that syn-
chronouslycontrolstheoperationofthechargepumpswitch-
ingmatrices. TheTC3682synchronouslyswitchesat12kHz,
the TC3683 synchronously switches at 35kHz, and the
TC3684 synchronously switches at 125kHz. The different
oscillator frequencies for this device family allow the user to
trade-off capacitor size versus supply current. Faster oscil-
lators can use smaller external capacitors, but will consume
more supply current (see Electrical Characteristics Table).
V
DROOP = IOUT x ROUT
Capacitor Selection
In order to maintain the lowest output resistance and
output ripple voltage, it is recommended that low ESR
capacitorsbeused. Additionally, largervaluesofC1andC2
willlowertheoutputresistanceandlargervaluesofCOUT will
reduce output ripple. NOTE: For proper charge pump
operation, C1 must have a voltage rating greater than or
equal to VIN, while C2 and COUT must have a voltage
rating greater than or equal to 2VIN.
When the shutdown input is in a low state, the oscillator
andbothswitchmatricesarepoweredoffplacingtheTC3682,
TC3683 and TC3684 in the shutdown mode. When the VIN
supply input is powered from an external battery, the shut-
downmodeminimizespowerconsumption,whichinturnwill
extend the life of the battery.
Table 1 shows various values of C1/C2 and the corre-
sponding output resistance values for VIN=5V @ +25°C.
Table 2 shows the output voltage ripple for various
values of COUT (again assuming VIN = 5V @ +25oC). The
VRIPPLE values assume a 1mA output load current and a
V
IN
0.1Ω ESRCOUT.
+
—V
IN
C1
SWITCH MATRIX
(1st STAGE)
Table 1. Output Resistance vs. C1/C2 (ESR = 0.1
C1,C2 TC3682 TC3683
F) ROUT ROUT
Ω).
C
OUT1
+
TC3684
ROUT (Ω)
ENABLE
(µ
(
Ω
)
(
Ω
)
OSCILLATOR
ENABLE
0.33
1
633
262
120
184
120
95
120
102
84
3.3
+
—2V
IN
C2
SWITCH MATRIX
(2nd STAGE)
C
OUT2
Table 2. Output Voltage Ripple vs. COUT (ESR = 0.1Ω) IOUT = 1mA
+
ENABLE
COUT
F)
TC3682 VRIPPLE
(mV)
TC3683 VRIPPLE
(mV)
TC3684 VRIPPLE
(mV)
SHDN
(
µ
0.33
1
192
63
60
21
8
27
16
7
3.3
17
Figure 1. Functional Block Diagram
3
2001 Microchip Technology Inc. DS21556A
TC3682/3/4-1 8/14/00
Inverting Charge Pump Voltage
Doublers with Active Low Shutdown
TC3682
TC3683
TC3684
Input Supply Bypassing
Layout Considerations
TheVIN input should be capacitively bypassed to reduce
ACimpedanceandminimizenoiseeffectsduetotheinternal
switchinginthedevice. Itisrecommendedthatalargevalue
capacitor (at least equal to C1) be connected from VIN to
GND for optimal circuit performance.
As with any switching power supply circuit, good layout
practice is recommended. Mount components as close
together as possible to minimize stray inductance and
capacitance. Also use a large ground plane to minimize
noise leakage into other circuitry.
Shutdown Input
TC3682 Demo Card
The TC3682, TC3683 and TC3684 are enabled when
SHDN is high, and disabled when SHDN is low. This input
cannot be allowed to float. (If SHDN is not required, see the
TC2682/2683/2684 data sheet.) The SHDN input should be
limited to 0.3V above VIN.
The TC3682 DEMO Card is a 2.0” x 2.0” card containing
both a TC3682 and a TC682 that allow the user to compare
the operation of each approach for generating a –2X func-
tion. Each circuit is fully assembled with the required
external capacitors along with variable load resistors that
allow the user to vary the output load current of each stage.
For convenience, several test points and jumpers are avail-
able for measuring various voltages and currents on the
demo board.
Inverting Voltage Doubler
The most common application for the TC3682/3683/
3684 devices is the inverting voltage doubler (Figure 2).
This application uses three external capacitors: C1, C2, and
COUT (NOTE: a power supply bypass capacitor is recom-
mended). Theoutput isequalto–2VIN plusanyvoltagedrop
due to loading. Refer to Tables 1 and 2 for capacitor
selection guidelines.
Figure 3 is a schematic of the TC3682 DEMO Card, and
Figure 4 shows the assembly drawing and artwork for the
board. Table 3 lists the voltages that are monitored by the
test points and Table 4 lists the currents that can be
measured using the jumpers.
Table 3. TC3682 DEMO Card Test Points
TEST POINT VOLTAGE MEASUREMENT
Device
TC3682
TC3683
TC3684
CIN
3.3µF 3.3µF
1µF 1µF
C1
C2
3.3µF
1µF
COUT
3.3µF
1µF
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
VIN [+1.8V TO +5V]
GROUND
0.33µF 0.33µF 0.33µF 0.33µF
GROUND
TC682 (U1) SUPPLY VOLTAGE
TC682 (U1) OUTPUT VOLTAGE [VOUT1
TC3682 (U2) SUPPLY VOLTAGE
]
V
IN
TC3682 (U2) OUTPUT VOLTAGE [VOUT2
TC3682 (U2) SHDN INPUT VOLTAGE
DEMO CARD /SHUTDOWN INPUT
]
C
IN
6
8
V
SHDN
7
IN
+
C1
C1
C2
Table 4. TC3682 DEMO Card Jumpers
TC3682
TC3683
TC3684
1
2
–
C1
JUMPER
CURRENT MEASUREMNT
+
C2
J1
J2
J3
J4
J5
J6
TC682 (U1) QUIESCENT CURRENT
TC3682 (U2) QUIESCENT CURRENT
TC682 (U1) VOUT1 LOAD CURRENT
TC3682 (U2) VOUT2 LOAD CURRENT
TC3682 (U2) SHDN INPUT CURRENT
4
V
–2V
OUT
IN
C
3
OUT
–
C2
R
L
GND
5
CONNECT DEMO CARD /SHUTDOWN
INPUT TO GND
Figure 2. Dual Voltage Inverter Test Circuit
4
2001 Microchip Technology Inc. DS21556A
TC3682/3/4-1 8/14/00
Inverting Charge Pump Voltage
Doublers with Active Low Shutdown
TC3682
TC3683
TC3684
Figure 3. TC3682 DEMO Card Schematic
Figure 4. TC3682 DEMO Card Assembly Drawing and Artwork
5
2001 Microchip Technology Inc. DS21556A
TC3682/3/4-1 8/14/00
Inverting Charge Pump Voltage
Doublers with Active Low Shutdown
TC3682
TC3683
TC3684
TAPING FORM
Component Taping Orientation for 8-Pin MSOP Devices
User Direction of Feed
User Direction of Feed
PIN 1
W
PIN 1
P
Standard Reel Component Orientation
for TR Suffix Device
Reverse Reel Component Orientation
for RT Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
8-Pin MSOP
12 mm
8 mm
2500
13 in
PACKAGE DIMENSIONS
8-Pin MSOP
PIN 1
.197 (5.00)
.189 (4.80)
.122 (3.10)
.114 (2.90)
.026 (0.65) TYP.
.122 (3.10)
.114 (2.90)
.043 (1.10)
MAX.
.008 (0.20)
.005 (0.13)
6° MAX.
.016 (0.40)
.010 (0.25)
.006 (0.15)
.002 (0.05)
.028 (0.70)
.016 (0.40)
Dimensions: inches (mm)
6
2001 Microchip Technology Inc. DS21556A
TC3682/3/4-1 8/14/00
WORLDWIDE
SALES AND
S
ERVICE
New York
150 Motor Parkway, Suite 202
Hauppauge, NY 11788
AMERICAS
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200 Fax: 480-792-7277
Technical Support: 480-792-7627
Web Address: http://www.microchip.com
ASIA/PACIFIC (continued)
Singapore
Microchip Technology Singapore Pte Ltd.
200 Middle Road
#07-02 Prime Centre
Singapore, 188980
Tel: 631-273-5305 Fax: 631-273-5335
San Jose
Microchip Technology Inc.
2107 North First Street, Suite 590
San Jose, CA 95131
Tel: 65-334-8870 Fax: 65-334-8850
Rocky Mountain
Taiwan
Microchip Technology Taiwan
11F-3, No. 207
Tung Hua North Road
Taipei, 105, Taiwan
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139
Tel: 408-436-7950 Fax: 408-436-7955
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7966 Fax: 480-792-7456
Toronto
6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: 905-673-0699 Fax: 905-673-6509
Atlanta
500 Sugar Mill Road, Suite 200B
Atlanta, GA 30350
Tel: 770-640-0034 Fax: 770-640-0307
Austin
Analog Product Sales
8303 MoPac Expressway North
Suite A-201
ASIA/PACIFIC
China - Beijing
Microchip Technology Beijing Office
Unit 915
New China Hong Kong Manhattan Bldg.
No. 6 Chaoyangmen Beidajie
Beijing, 100027, No. China
Tel: 86-10-85282100 Fax: 86-10-85282104
EUROPE
Australia
Microchip Technology Australia Pty Ltd
Suite 22, 41 Rawson Street
Epping 2121, NSW
Austin, TX 78759
Tel: 512-345-2030 Fax: 512-345-6085
Australia
Tel: 61-2-9868-6733 Fax: 61-2-9868-6755
Denmark
Microchip Technology Denmark ApS
Regus Business Centre
Lautrup hoj 1-3
Ballerup DK-2750 Denmark
Tel: 45 4420 9895 Fax: 45 4420 9910
Boston
2 Lan Drive, Suite 120
Westford, MA 01886
Tel: 978-692-3848 Fax: 978-692-3821
China - Shanghai
Microchip Technology Shanghai Office
Room 701, Bldg. B
Far East International Plaza
No. 317 Xian Xia Road
Shanghai, 200051
Boston
Analog Product Sales
Unit A-8-1 Millbrook Tarry Condominium
97 Lowell Road
Concord, MA 01742
France
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060
Arizona Microchip Technology SARL
Parc díActivite du Moulin de Massy
43 Rue du Saule Trapu
Hong Kong
Microchip Asia Pacific
RM 2101, Tower 2, Metroplaza
223 Hing Fong Road
Kwai Fong, N.T., Hong Kong
Tel: 852-2401-1200 Fax: 852-2401-3431
Tel: 978-371-6400 Fax: 978-371-0050
Chicago
333 Pierce Road, Suite 180
Itasca, IL 60143
Tel: 630-285-0071 Fax: 630-285-0075
Dallas
4570 Westgrove Drive, Suite 160
Addison, TX 75001
Tel: 972-818-7423 Fax: 972-818-2924
Batiment A - ler Etage
91300 Massy, France
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79
Germany
Arizona Microchip Technology GmbH
Gustav-Heinemann Ring 125
D-81739 Munich, Germany
India
Microchip Technology Inc.
India Liaison Office
Divyasree Chambers
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44
1 Floor, Wing A (A3/A4)
No. 11, OíShaugnessey Road
Bangalore, 560 025, India
Tel: 91-80-2290061 Fax: 91-80-2290062
Dayton
Germany
Analog Product Sales
Lochhamer Strasse 13
D-82152 Martinsried, Germany
Tel: 49-89-895650-0 Fax: 49-89-895650-22
Two Prestige Place, Suite 130
Miamisburg, OH 45342
Tel: 937-291-1654 Fax: 937-291-9175
Japan
Detroit
Tri-Atria Office Building
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: 248-538-2250 Fax: 248-538-2260
Microchip Technology Intl. Inc.
Benex S-1 6F
Italy
Arizona Microchip Technology SRL
Centro Direzionale Colleoni
Palazzo Taurus 1 V. Le Colleoni 1
20041 Agrate Brianza
3-18-20, Shinyokohama
Kohoku-Ku, Yokohama-shi
Kanagawa, 222-0033, Japan
Tel: 81-45-471- 6166 Fax: 81-45-471-6122
Los Angeles
18201 Von Karman, Suite 1090
Irvine, CA 92612
Milan, Italy
Tel: 39-039-65791-1 Fax: 39-039-6899883
Korea
Microchip Technology Korea
168-1, Youngbo Bldg. 3 Floor
Samsung-Dong, Kangnam-Ku
Seoul, Korea
Tel: 949-263-1888 Fax: 949-263-1338
United Kingdom
Arizona Microchip Technology Ltd.
505 Eskdale Road
Winnersh Triangle
Wokingham
Mountain View
Analog Product Sales
1300 Terra Bella Avenue
Mountain View, CA 94043-1836
Tel: 650-968-9241 Fax: 650-967-1590
Tel: 82-2-554-7200 Fax: 82-2-558-5934
Berkshire, England RG41 5TU
Tel: 44 118 921 5869 Fax: 44-118 921-5820
01/09/01
All rights reserved.
©
2001 Microchip Technology Incorporated. Printed in the USA. 1/01
Printed on recycled paper.
Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by
updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual
property rights arising from such use or otherwise. Use of Microchipís products as critical components in life support systems is not authorized except with
express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, except as maybe explicitly expressed herein, under any intellec-
tual property rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights
reserved. All other trademarks mentioned herein are the property of their respective companies.
7
2001 Microchip Technology Inc. DS21556A
TC3682/3/4-1 8/14/00
相关型号：
©2020 ICPDF网 联系我们和版权申明