TC1121_06 MICROCHIP [Microchip Technology], TC1121_06 Datasheet

TC1121_06

Manufacturer Part Number

TC1121_06

Description

100mA Charge Pump Voltage Converter with Shutdown

Manufacturer

MICROCHIP [Microchip Technology]

Datasheet

1.TC1121_06.pdf (14 pages)

Current page: 1 of 14
Download datasheet (510Kb)

Features:

• Optional High-Frequency Operation Allows Use of

• Low Operating Current (FC = GND):

• High Output Current (100 mA)

• 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

TC1121COA

TC1121CPA

TC1121CUA

TC1121EOA

TC1121EPA

TC1121EUA

Small Capacitors

- 50 μA

Corresponding Negative Output Voltage

(Inverter mode)

- 10 kHz to 200 kHz

Small Outline (SOIC) Packages

100mA Charge Pump Voltage Converter with Shutdown

Number

Part

8-Pin MSOP

8-Pin SOIC

8-Pin PDIP

Package

-40°C to +85°C

0°C to +70°C

Operating

Range

Temp.

Package Type

General Description:

The TC1121 is a charge pump converter with 100 mA

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 10 kHz (at V

(FC) is connected to ground. The oscillator frequency

increases to 200 kHz when FC is connected to V

allowing the use of smaller capacitors. Operation at

sub-10 kHz 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 10 kHz is

50 μA, and falls to less than 1 μA 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

GND

–

= 5V) when the frequency control input

8-Pin MSOP

8-Pin SOIC

8-Pin PDIP

TC1121COA

TC1121EOA

TC1121CUA

TC1121CPA

TC1121EUA

TC1121EPA

TC1121

DS21358C-page 1

V +

OSC

SHDN

V +

OSC

SHDN

OUT

Related parts for TC1121_06

TC1121_06 Summary of contents

Page 1

Charge Pump Voltage Converter with Shutdown Features: • Optional High-Frequency Operation Allows Use of Small Capacitors • Low Operating Current (FC = GND μA • High Output Current (100 mA) • Converts a 2.4V to 5.5V Input ...

Page 2

Page 3

ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings* Supply Voltage (V ) ............................................... 6V DD OSC, FC, SHDN Input Voltage .....-0. Output Short Circuit Duration ........................... 10 Sec. ≤ 70°C) Package Power Dissipation (T A 8-Pin PDIP .............................................. 730 mW ...

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 200 kHz ...

Page 5

APPLICATIONS 3.1 Negative Voltage Converter The TC1121 is typically used as a charge-pump voltage inverter. C1 and C2 are the only two external capacitors used in the operating circuit (Figure 3-1). 2. ...

Page 6

TC1121 3.4 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 ...

Page 7

Combined Positive Supply Multiplication and Negative Voltage Conversion Figure 3-4 shows this dual function circuit, in which capacitors C1 and C2 perform pump and reservoir functions to generate negative voltage. Capacitors C3 and C4 are the respective capacitors for ...

Page 8

TC1121 4.0 PACKAGING INFORMATION 4.1 Package Marking Information Package marking data not available at this time. 4.2 Taping Form Component Taping Orientation for 8-Pin MSOP Devices Pin 1 Carrier Tape, Number of Components Per Reel and Reel Size Package 8-Pin ...

Page 9

Package Dimensions 8-Pin MSOP .122 (3.10) .114 (2.90) .026 (0.65) Typ. .122 (3.10) .114 (2.90) .016 (0.40) .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 ...

Page 10

TC1121 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) DS21358C-page 10 Pin 1 .244 (6.20) .228 (5.79) .069 (1.75) .053 (1.35) ° 8 Max. ...

Page 11

THE MICROCHIP WEB SITE Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web ...

Page 12

TC1121 READER RESPONSE It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip prod- uct. If you wish to provide your comments on organization, clarity, subject matter, and ways in which ...

Page 13

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 14

W ORLDWIDE AMERICAS ASIA/PACIFIC Corporate Office Australia - Sydney 2355 West Chandler Blvd. Tel: 61-2-9868-6733 Chandler, AZ 85224-6199 Fax: 61-2-9868-6755 Tel: 480-792-7200 China - Beijing Fax: 480-792-7277 Tel: 86-10-8528-2100 Technical Support: Fax: 86-10-8528-2104 http://support.microchip.com China - Chengdu Web Address: Tel: ...

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