TC1121 Microchip, TC1121 Datasheet

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TC1121

Manufacturer Part Number
TC1121
Description
100mA Charge Pump Voltage Converter with Shutdown
Manufacturer
Microchip
Datasheet

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 2002 Microchip Technology Inc.
Features
• Optional High-Frequency Operation Allows Use of
• Low Operating Current (FC = GND)
• High Output Current (100mA)
• Converts a 2.4V to 5.5V Input Voltage to a
• Uses Only 2 Capacitors; No Inductors Required
• Selectable Oscillator Frequency
• Power-Saving Shutdown Input
• Available in 8-Pin MSOP, 8-Pin PDIP and 8-Pin
Applications
• Laptop Computers
• Medical Instruments
• Disk Drives
• µP-Based Controllers
• Process Instrumentation
Device Selection Table
M
Small Capacitors
- 50µA
Corresponding Negative Output Voltage
(Inverter Mode)
- 10kHz to 200kHz
Small Outline (SOIC) Packages
TC1121COA
TC1121CUA
TC1121EOA
TC1121EUA
TC1121CPA
TC1121EPA
100mA Charge Pump Voltage Converter with Shutdown
Number
Part
8-Pin MSOP
8-Pin MSOP
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
8-Pin PDIP
Package
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Operating
Range
Temp.
Package Type
General Description
The TC1121 is a charge pump converter with 100mA
output current capability. It converts a 2.4V to 5.5V
input to a corresponding negative output voltage. As
with all charge pump converters, the TC1121 uses no
inductors saving cost, size and EMI.
An on-board oscillator operates at a typical frequency
of 10kHz (at V
(FC) is connected to ground. The oscillator frequency
increases to 200kHz when FC is connected to V
allowing the use of smaller capacitors. Operation at
sub-10kHz frequencies results in lower quiescent
NScurrent and is accomplished with the addition of an
external capacitor from OSC (pin 7) to ground. The
TC1121 also can be driven from an external clock
NSconnected OSC. Typical supply current at 10kHz is
50µA, and falls to less than 1µA when the shutdown
input is brought low, whether the internal or an external
clock is used. The TC1121 is available in 8-pin SOIC,
MSOP and PDIP packages.
CAP
CAP
CAP
CAP
GND
GND
FC
FC
+
+
+
= 5V) when the frequency control input
1
2
3
4
1
2
3
4
8-Pin MSOP
8-Pin SOIC
8-Pin PDIP
TC1121COA
TC1121CPA
TC1121EOA
TC1121CUA
TC1121EUA
TC1121EPA
TC1121
8
7
6
5
8
7
6
5
DS21358B-page 1
V +
OSC
SHDN
V
V +
OSC
SHDN
V
OUT
OUT
+
,

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TC1121 Summary of contents

Page 1

... TC1121 also can be driven from an external clock NSconnected OSC. Typical supply current at 10kHz is 50µA, and falls to less than 1µA when the shutdown input is brought low, whether the internal or an external clock is used. The TC1121 is available in 8-pin SOIC, MSOP and PDIP packages. TC1121 8-Pin PDIP ...

Page 2

... TC1121 Functional Block Diagram HDN SC Control DS21358B-page C1121 RC witch Oscillator atrix ogic ircuits UT 2  2002 Microchip Technology Inc. ...

Page 3

... Note 1: Connecting any input terminal to voltages greater than V inputs from sources operating from external supplies be applied prior to "power up" of the TC1121.  2002 Microchip Technology Inc. *Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These ...

Page 4

... TC1121 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (8-Pin MSOP, Symbol PDIP, SOIC Frequency control for internal oscillator open, F typ; FC has no effect when OSC pin is driven externally CAP Charge-pump capacitor, positive terminal. 3 GND Power-supply ground input. – ...

Page 5

... C1 and C2. 3.3 Capacitor Selection In addition to load current, the following factors affect the TC1121 output voltage drop from its ideal value 1) output resistance, 2) pump (C1) and reservoir (C2) capacitor ESRs and 3) C1 and C2 capacitance. The voltage drop is the load current times the output resistance. The loss the load current times C2’ ...

Page 6

... Cascading Devices To produce greater negative magnitudes of the initial supply voltage, the TC1121 may be cascaded (see Figure 3-2). Resulting output resistance is approxi- mately equal to the sum of individual TC1121 R values. The output voltage (where integer representing the number of devices cascaded) is defined ...

Page 7

... This particular configuration leads to higher source impedances of the generated supplies due to the finite impedance of the common charge-pump driver 1N4148 C1121 UT 2 HDN* HDN not used TC1121 – – – FD2 DS21358B-page 7 ...

Page 8

... TC1121 4.0 PACKAGING INFORMATION 4.1 Package Marking Information Package marking data not available at this time. 4.2 Package Dimensions 8-Pin MSOP .122 (3.10) .114 (2.90) .026 (0.65) TYP. .122 (3.10) .114 (2.90) .016 (0.40) .006 (0.15) .010 (0.25) .002 (0.05) 8-Pin Plastic DIP .045 (1.14) .030 (0.76) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) DS21358B-page 8 PIN 1 ...

Page 9

... Package Dimensions (Continued) 8-Pin SOIC .157 (3.99) .150 (3.81) .050 (1.27) TYP. .197 (5.00) .189 (4.80) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10)  2002 Microchip Technology Inc. PIN 1 .244 (6.20) .228 (5.79) .069 (1.75) .053 (1.35) ° 8 MAX. . .050 (1.27) .016 (0.40) Dimensions: inches (mm) TC1121 .010 (0.25) .007 (0.18) DS21358B-page 9 ...

Page 10

... TC1121 NOTES: DS21358B-page 10  2002 Microchip Technology Inc. ...

Page 11

... 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. TC1121 DS21358B-page11 ...

Page 12

... TC1121 NOTES: DS21358B-page12  2002 Microchip Technology Inc. ...

Page 13

... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights.  2002 Microchip Technology Inc. TC1121 Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

Page 14

... Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...

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