TPS60101

REGULATED 3.3V 100mA LOW NOISE

CHARGE PUMP DC/DC CONVERTER

SLVS214B − JUNE 1999 − REVISED AUGUST 2008

1

POST OFFICE BOX 655303

features

PowerPAD

 Package

(TPS60100EVM−131)

applications

Replaces DC/DC Converters With Inductors in

− Battery-Powered Applications

− Two Battery Cells to 3.3-V Conversion

− Portable Instruments

− Battery-Powered Microprocessor and

DSP Systems

− Miniature Equipment

− Backup-Battery Boost Converters

− PDAs

− Laptops

− Handheld Instrumentation

− Medical Instruments

− Cordless Phones

description

The TPS60101 step-up, regulated charge pump

generates a 3.3-V

±4% output voltage from a

1.8-V to 3.6-V input voltage (two alkaline, NiCd, or

NiMH batteries). Output current is 100 mA from a

2-V input. Only four external capacitors are

needed to build a complete low-noise 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. From a 2-V input, the

TPS60101 can start into full load with loads as low

as 33

Ω.

The TPS60101 features either constant frequen-

cy mode to minimize noise and output voltage

ripple or the power-saving pulse-skip mode to

extend battery life at light loads. The TPS60101

switching frequency is 300 kHz. The logic

shutdown function reduces the supply current to

1-

µA (max) and disconnects the load from the

input. Special current-control circuitry prevents

excessive current from being drawn from the

battery during start-up. This DC/DC converter

requires no inductors and has low EMI. It is

available in the small 20-pin TSSOP PowerPAD



package (PWP).

Copyright

 1999, Texas Instruments Incorporated

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.

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.

PowerPAD is a trademark of Texas Instruments Incorporated.

output voltage ripple

typical operating circuit

Figure 1

3.45

10

3.25

3.3

3.35

3.4

3.05

3.1

3.15

3.2

5

01

23

4

6

7

8

9

t − Time −

µs

SKIP =COM = 3V8 = 0 V

VIN = 2.4 V

VO = 3.3 V

IO = 100 mA

CO = 22 µF

X5R Ceramic

IN

IN

C1+

C1−

ENABLE

OUT

OUT

FB

C2+

C2−

SYNC

SKIP COM 3V8

PGND GND

INPUT

1.8 V to

3.6 V

CIN

4.7

µF

OUTPUT

3.3 V

100 mA

CO

10

µF

C2F

1

µF

C1F

1

µF

+

OFF/ON

TPS60101

+