TPS60240 Datasheet, PDF (1/20 Pages) Texas Instruments – 170-uVrms ZERO-RIPPLE SWITCHED CAP BUCK-BOOST CONVERTER FOR VCO SUPPLY

TPS60240, TPS60241
TPS60242, TPS60243
Actual Size
(3,05 mm x 4,98 mm)
SLVS372B – JUNE 2001 – REVISED JANUARY 2002
170-µVrms ZERO-RIPPLE SWITCHED CAP BUCK-BOOST
CONVERTER FOR VCO SUPPLY
FEATURES
D Wide Input Voltage Range:
– 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)
D 170-µVrms Zero Ripple Output:
– at 20 Hz to 10 MHz Bandwidth
D Minimum Number of External Components
– No Inductors
– Only Small Ceramic Chip Capacitors
D Up to 90% Efficiency
D Regulated 3.3-V (TPS60240), 5-V (TPS60241),
3-V (TPS60243), and 2.7-V (TPS60242) Output
Voltage With ±2.5% Accuracy Over Load
D Up to 25-mA Output Current
D Shutdown Mode: 0.1 µA Typical
D Thermal Protection and Current Limit
D Microsmall 8-Pin MSOP Package
D EVM Available TPS60241EVM-194
APPLICATIONS
D VCO and PLL Power for:
– PDA Phones
– Cellular Phones
– PCMCIA Modems
D Smartcard Readers
D Digital Cameras
D MP3 Players
D SIM Modules
D Electronic Games
D Memory Backup
D Handheld Meters
D Bias Supplies
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
3.3 V
CI
1 µF
GND
C1
1 µF
VIN
VOUT
TPS60241
C1+
C2+
C1–
C2–
GND
EN
5V
C2
1 µF
VCC
CO
1 µF
VCO
GND
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.
Copyright  2002, Texas Instruments Incorporated
www.ti.com
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