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TPS79225DBVR Datasheet(PDF) 1 Page - Texas Instruments |
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TPS79225DBVR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 19 page TPS79201, TPS79225 TPS79228, TPS79230 SLVS337B – MARCH 2001 – REVISED MAY 2002 ULTRALOW-NOISE, HIGH PSRR, FAST RF 100-mA LOW-DROPOUT LINEAR REGULATORS (3,00 mm x 3,00 mm) Actual Size (3,00 mm x 3,00 mm) Actual Size FEATURES D 100-mA Low-Dropout Regulator With EN D Available in 2.5-V, 2.8-V, 3-V, and Adj. D High PSRR (75 dB at 10 kHz) D Ultralow Noise (27 µV) D Fast Start-Up Time (50 µs) D Stable With Any 1-µF Ceramic Capacitor D Excellent Load/Line Transient D Very Low Dropout Voltage (55 mV at Full Load, TPS79230) D 5-Pin SOT23 (DBV) Package D TPS791xx Provides EN Options APPLICATIONS D Cellular and Cordless Telephones D VCOs D RF D Bluetooth, Wireless LAN D Handheld Organizers, PDA DESCRIPTION The TPS792xx family of low-dropout (LDO) low-power linear voltage regulators features high power supply rejection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in a small outline, SOT23, package. Each device in the family is stable, with a small 1- µF ceramic capacitor on the output. The family uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (e.g., 55 mV at 100 mA, TPS79230). Each device achieves fast start-up times (approximately 50 µs with a 0.001 µF bypass capacitor) while consuming very low quiescent current (170 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79228 exhibits approximately 27 µVRMS of output voltage noise with a 0.1 µF bypass capacitor. Applications with analog components that are noise sensitive, such as portable RF electronics, benefit from the high PSRR and low noise features as well as the fast response time. 10 100 1 k 10 k 20 50 90 100 k 1 M 10 M f – Frequency – Hz TPS79228 RIPPLE REJECTION vs FREQUENCY IO = 10 mA 60 0 VI = 3.8 V Co = 10 µF C(byp) = 0.01 µF IO = 100 mA 10 30 40 70 80 f – Frequency – Hz 1k 10k 100k IO = 1 mA VI = 3.8 V Co = 1 µF C(byp) = 0.1 µF 100 IO = 100 mA TPS79228 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY 0 0.05 0.1 0.15 0.2 0.25 0.3 3 2 4 5 DBV PACKAGE (TOP VIEW) 1 IN GND EN OUT BYPASS Fixed Option 3 2 4 6 DBV PACKAGE (TOP VIEW) 1 IN GND EN OUT BYPASS 5 FB Adjustable Option 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. www.ti.com Copyright 2002, Texas Instruments Incorporated Bluetooth is a trademark owned by the Bluetooth SIG, Inc. |
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