TPS60111

REGULATED 5V 150mA LOW NOISE

CHARGE PUMP DC/DC CONVERTER

SLVS216B − JUNE 1999 − JUNE 2008

1

POST OFFICE BOX 655303

features

PowerPAD

 Package

(TPS60110EVM−132)

applications

Replaces DC/DC Converters With Inductors in

− Battery-Powered Applications

− Li-Ion Battery to 5-V Conversion

− Portable Instruments

− Battery-Powered Microprocessor

Systems

− Miniature Equipment

− Backup-Battery Boost Converters

− PDAs

− Laptops

− Handheld Instrumentation

− Medical Instruments

description

The TPS60111 step-up, regulated charge pump

generates a 5-V

±4% output voltage from a 2.7-V

to 5.4-V input voltage (three alkaline, NiCd, or

NiMH batteries; or, one lithium or lithium ion

battery). Output current is 150 mA from a 3-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 3-V input, the TPS60111 can start

into full load with loads as low as 33

Ω.

The TPS60111 features either constant frequency

mode to minimize noise and output voltage ripple

or the power-saving pulse-skip mode to extend

battery life at light loads. The TPS60111 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 cur-

rent 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 − 2008, 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

SKIP =COM = CLK = 0 V

VIN = 3.6 V

IO = 150 mA

CO = 22 µF + 10 µF

X5R Ceramic

5.2

5

5.05

5.1

5.15

4.8

4.85

4.9

4.95

5

2.5

0

0.5

1

1.5

2

3

3.5

4

4.5

t − Time −

µs

IN

IN

C1+

C1−

ENABLE

OUT

OUT

FB

C2+

C2−

SYNC

SKIP COM CLK

PGND GND

INPUT

2.7 V to

5.4 V

CIN

4.7

µF

OUTPUT

5 V

150 mA

CO

15

µF

C2F

1

µF

C1F

1

µF

+

OFF/ON

TPS60110

+