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TPS79401DCQ Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS79401DCQ Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 15 page www.ti.com FEATURES DESCRIPTION APPLICATIONS OUT NC − No internal connection 1 2 3 4 5 DCQ PACKAGE NR OUT GND IN EN 2 1 3 4 7 8 6 5 NC FB NR IN NC EN GND SOT223-6 (TOP VIEW) DGN PACKAGE MSOP PowerPAD (TOP VIEW) IOUT = 10 mA IOUT = 250 mA VIN = 4.3 V, VOUT = 3.3 V, CIN = 1 µF, COUT = 10 µF, CNR = 0.01 µF 40 20 10 10 100 1 k 10 k 60 70 Frequency (Hz) TPS79433 RIPPLE REJECTION vs FREQUENCY 90 100 k 1 M 10 M 0 30 50 80 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 IOUT = 250 mA IOUT = 1 mA COUT = 2.2 µF, CNR = 0.1 µF, VIN = 3.8 V TPS79428 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY Frequency (Hz) 100 1000 10000 100000 6 GND TPS79401, TPS79418 TPS79425, TPS79428 TPS79430, TPS79433 SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004 ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR REGULATORS • 250-mA Low-Dropout Regulator With Enable The TPS794xx family of low-dropout (LDO) linear voltage regulators features high power-supply rejec- • Available in 1.8 V, 2.5 V, 2.8 V, 3 V, 3.3 V, and tion ratio (PSRR), ultralow-noise, fast start-up, and Adjustable (1.2 V to 5.5 V) excellent line and load transient responses in small • High PSRR (60 dB at 10 kHz) outline, MSOP-8 PowerPAD™ and SOT223-6 pack- • Ultralow Noise (32 µVrms, TPS79428) ages. Each device in the family is stable with a small 2.2-µF ceramic capacitor on the output. The family • Fast Start-Up Time (50 µs) uses an advanced, proprietary BiCMOS fabrication • Stable With a 2.2-µF Ceramic Capacitor process to yield extremely low dropout voltages (e.g., • Excellent Load/Line Transient Response 155 mV at 250 mA). Each device achieves fast start-up times (approximately 50 µs with a 0.001-µF • Very Low Dropout Voltage (155 mV at Full bypass capacitor) while consuming low quiescent Load) current (170 µA typical). Moreover, when the device • Available in MSOP-8 and SOT223-6 Packages is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79428 exhibits approximately 32 µVRMS of output voltage noise at • RF: VCOs, Receivers, ADCs 2.8 V output with a 0.1-µF bypass capacitor. Appli- cations with analog components that are • Audio noise-sensitive, such as portable RF electronics, • Bluetooth™, Wireless LAN benefit from the high PSRR and low noise features as • Cellular and Cordless Telephones well as the fast response time. • Handheld Organizers, PDAs 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. Bluetooth is a trademark of Bluetooth SIG, Inc. PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2001–2004, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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Description similaire - TPS79401DCQ |
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