TPS60204, TPS60205

REGULATED 3.3V, 100mA LOW RIPPLE CHARGE PUMP

LOW POWER DC/DC CONVERTERS

SLVS354A − FEBRUARY 2001 − REVISED SEPTEMBER 2001

1

POST OFFICE BOX 655303

features

100-mA Output Current From a 1.8-V to

3.6-V Input Voltage

Achieved With Push-Pull Topology

Detector

to External Clock Signal

Efficiency and 35-

µA Quiescent Supply

Current

Supply Since No Inductors Are Used

Isolated From Load in Shutdown Mode

10-pin MSOP With Only Four External

Capacitors Required

(TPS60200EVM-145)

applications

in Battery Powered Applications Like:

− Two Battery Cells to 3.3-V Conversion

− MP3 Portable Audio Players

− Battery-Powered Microprocessor

Systems

− Backup-Battery Boost Converters

− PDA’s, Organizers, and Cordless Phones

− Handheld Instrumentation

− Glucose Meters and Other Medical

Instruments

·

description

The TPS6020x step-up, regulated charge pumps generate a 3.3-V

±4% output voltage from a 1.8-V to 3.6-V

input voltage. The devices are typically powered by two Alkaline, NiCd, or NiMH battery cells and operate down

to a minimum supply voltage of 1.6 V. Continuous output current is a minimum of 100 mA from a 2-V input. Only

four external capacitors are needed to build a complete low-ripple dc/dc converter. The push-pull operating

mode of two single-ended charge pumps assures the low output voltage ripple, as current is continuously

transferred to the output.

Figure 1. Typical Application Circuit

With Low-Battery Warning

OUTPUT

3.3 V, 100 mA

INPUT

1.6 V to 3.6 V

OFF/ON

C1

C2

Co

Ci

R1

R2

1

2

3

4

5

6

7

8

9

10

R3

Low Battery

Warning

IN

EN

C1−

C1+

LBI

TPS60204

OUT

C2−

C2+

LBO

GND

TPS60204

PEAK OUTPUT CURRENT

vs

INPUT VOLTAGE

150

100

50

0

1.6

2.0

2.4

2.8

200

250

350

3.2

3.6

300

VI − Input Voltage − V

2.2

µF

2.2

µF

1

µF

1

µF

Copyright

 2001, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.