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TPS78618 PDF预览

TPS78618

更新时间: 2024-11-14 22:52:47
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德州仪器 - TI 稳压器射频
页数 文件大小 规格书
17页 547K
描述
ULTRALOW-NOISE, HIGH PSRR, FAST RF 1.5 A LOW-DROPOUT LINEAR REGULATORS

TPS78618 数据手册

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TPS78601, TPS78618  
TPS78625, TPS78628  
TPS78630, TPS78633  
www.ti.com  
SLVS389DSEPTEMBER 2002REVISED OCTOBER 2004  
ULTRALOW-NOISE, HIGH PSRR, FAST RF 1.5 A LOW-DROPOUT LINEAR  
REGULATORS  
FEATURES  
DESCRIPTION  
1.5 A Low-Dropout Regulator With Enable  
The TPS786xx 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 small outline, SOT223-6 and 5-pin  
DDPAK packages. 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., 390 mV at 1.5 A). Each device  
achieves fast start-up times (approximately 50 µs with  
a 0.001 µF bypass capacitor) while consuming very  
low quiescent current (265 µA typical). Moreover,  
when the device is placed in standby mode, the  
supply current is reduced to less than 1 µA. The  
TPS78630 exhibits approximately 48 µVRMS of output  
voltage at 3.0 V output 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, low noise features, and  
the fast response time.  
Available in 1.8-V, 2.5-V, 2.8-V, 3-V, 3.3-V, and  
Adjustable (1.2-V to 5.5-V)  
High PSRR (49 dB at 10 kHz)  
Ultralow Noise (48 µVRMS, TPS79630)  
Fast Start-Up Time (50 µs)  
Stable With a 1-µF Ceramic Capacitor  
Excellent Load/Line Transient Response  
Very Low Dropout Voltage (390 mV at Full  
Load, TPS78630)  
6-Pin SOT223-6 and 5-Pin DDPAK Package  
APPLICATIONS  
RF: VCOs, Receivers, ADCs  
Audio  
Bluetooth™, Wireless LAN  
Cellular and Cordless Telephones  
Handheld Organizers, PDAs  
TPS78630  
TPS78630  
DCQ PACKAGE  
SOT223-6  
(TOP VIEW)  
RIPPLE REJECTION  
vs  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
FREQUENCY  
FREQUENCY  
1
2
3
4
EN  
IN  
GND  
OUT  
NR  
80  
70  
60  
50  
40  
30  
20  
10  
0
0.80  
0.70  
0.60  
0.50  
0.40  
0.30  
0.20  
0.10  
0.00  
V
= 4 V  
IN  
V
= 5.5 V  
= 2.2 µF  
6
GND  
IN  
C
C
= 10 µF  
C
C
OUT  
= 0.01 µF  
OUT  
= 0.1 µF  
I
= 1 mA  
= 1.5 A  
OUT  
NR  
NR  
5
I
OUT  
KTT (DDPAK) PACKAGE  
(TOP VIEW)  
I
= 1 mA  
OUT  
EN  
1
2
IN  
GND  
OUT  
NR  
3
4
I
= 1.5 A  
OUT  
5
1
10  
100  
1k 10k 100k 1M 10M  
100  
1k  
10k  
100k  
Frequency (Hz)  
Frequency (Hz)  
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.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2002–2004, Texas Instruments Incorporated  

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