TPS60240, TPS60241

TPS60242, TPS60243

SLVS372B – JUNE 2001 – REVISED JANUARY 2002

170-

µVrms ZERO-RIPPLE SWITCHED CAP BUCK-BOOST

CONVERTER FOR VCO SUPPLY

(3,05 mm x 4,98 mm)

Actual Size

1

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FEATURES

– 1.8 V To 5.5 V for 2.7-V, 3-V, 3.3-V Output

(TPS60240/2/3)

– 2.7 V To 5.5 V for 5-V Output (TPS60241)

– at 20 Hz to 10 MHz Bandwidth

– No Inductors

– Only Small Ceramic Chip Capacitors

3-V (TPS60243), and 2.7-V (TPS60242) Output

Voltage With

±2.5% Accuracy Over Load

APPLICATIONS

– PDA Phones

– Cellular Phones

– PCMCIA Modems

DESCRIPTION

The TPS6024x is a switched capacitor voltage

converter, ideally suited for VCO and PLL applications

that require low noise and tight tolerances. Its dual-cap

design uses four ceramic capacitors to provide ultralow

output ripple yet high efficiency, while eliminating the

need for inefficient linear regulators.

A wide input supply voltage range of 2.7 V to 5.5 V

makes the TPS6024x ideal for lithium-based battery

applications. The TPS60240/2/3 operates down to

1.8 V, supporting a 3.3-V, 2.7-V, 3-V output from

two-cell, nickel- or alkaline-based chemistries. The

devices work equally well for low EMI dc/dc step-up

conversion without the need for an inductor. The high

switching frequency (typical 160 kHz) promotes the use

of small surface-mount capacitors, saving board space.

The converter’s shutdown mode conserves battery

energy.

typical application circuit

TPS60241

VIN

C1

1

µF

C2

1

µF

C1+

C1–

GND

VOUT

C2+

C2–

EN

CI

1

µF

GND

3.3 V

5 V

CO

1

µF

VCO

VCC

GND

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.

Copyright

 2002, 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.