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Part: TPS60242
Category:
Power Management
-> Regulators
-> Switching Regulators
Description:
Company: Texas Instruments, Inc.
Datasheet: Download TPS60242 datasheet File size : 1534 kB
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Datasheet text preview:
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) 170-µVrms Zero Ripple Output: at 20 Hz to 10 MHz Bandwidth Minimum Number of External Components No Inductors Only Small Ceramic Chip Capacitors Up to 90% Efficiency Regulated 3.3-V (TPS60240), 5-V (TPS60241), 3-V (TPS60243), and 2.7-V (TPS60242) Output Voltage With ±2.5% Accuracy Over Load Up to 25-mA Output Current Shutdown Mode: 0.1 µA Typical Thermal Protection and Current Limit Microsmall 8-Pin MSOP Package EVM Available TPS60241EVM-194
D D D D D D D D D
D D D D D D D
Digital Cameras MP3 Players SIM Modules Electronic Games Memory Backup Handheld Meters 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.
APPLICATIONS D VCO and PLL Power for:
PDA Phones Cellular Phones PCMCIA Modems Smartcard Readers
D
typical application circuit
3.3 V VIN VOUT 5V VCC
CI 1 µF GND
C1 1 µF
TPS60241 C1+ C2+ C1 GND C2 EN
C2 1 µF
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
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TPS60240, TPS60241 TPS60242, TPS60243
SLVS372B JUNE 2001 REVISED JANUARY 2002
description(continued)
The devices are thermally protected and current-limited for reliable operation even under persisting fault conditions. Normal quiescent current (ground pin current) is only 250 µA, and typically 0.1 µA in shutdown mode. The TPS6024x devices come in a thin, 8-pin MSOP (DGK) package with a component height of only 1,1 mm.
DGK PACKAGE (TOP VIEW)
VO U T EN C2 GND
1 2 3 4
8 7 6 5
C2+ C1+ VIN C1
AVAILABLE OPTIONS TA 40°C to 85°C 40°C to 85°C 85 C PART NUMBER TPS60241DGKR TPS60240DGKR TPS60242DGKR TPS60243DGKR PACKAGE MARKING AUB ATM AYF AYG PACKAGE DGK (8-pin MSOP) DGK (8-pin MSOP) DGK (8-pin MSOP) DGK (8-pin MSOP) OUTPUT VOLTAGE (V) 5V 3.3 V 2.7 V
3V This package type is available taped and reeled only. Quantity is 2500 units per reel (e.g., TPS60241DGKR). The devices are also available on mini reel with 250 units per reel. To order this packaging option, replace the R with a T in the part number (e.g., TPS60261DGKT).
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TPS60240, TPS60241 TPS60242, TPS60243
SLVS372B JUNE 2001 REVISED JANUARY 2002
functional block diagram
VIN C1+ C1 C1 Charge Pump 1 0° Charge Pump 2 Oscillator 180° C2+ C2 Control Circuit With Thermal and Overload Protection C2 VOUT + _
EN
Reference
GND
Terminal Functions
TERMINAL NAME C1+ C1 C2+ C2 EN GND VIN VOUT NO. 7 5 8 3 2 4 6 1 I O I I/O Positive terminal of the flying capacitor C1 Negative terminal of the flying capacitor C1 Positive terminal of the flying capacitor C2 Negative terminal of the flying capacitor C2 Enable terminal, active high Ground Supply voltage input TPS60241: 2.7 V to 5.5 V, TPS60240/2/3: 1.8 V to 5.5 V. Bypass VIN to GND with a 1-µF external capacitor (CI). Regulated power output. Bypass VOUT to GND with a 1-µF external filter capacitor (CO). TPS60241: regulated 5-V output, TPS60240: regulated 3.3-V output, TPS60242: regulated 2.7-V output, TPS60243: regulated 3-V output DESCRIPTION
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