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Dual 250 mA High-Performance RF LDOs
Available in Fixed and Adjustable
Voltage Options (1.2 V to 5.5 V)
High PSRR: 65 dB at 10 kHz
UltraLow Noise: 32 碌Vrms
Fast Start-Up Time: 60 碌s
Stable with 2.2 碌F Ceramic Capacitor
Excellent Load/Line Transient Response
Very Low Dropout Voltage: 125 mV at 250 mA
Independent Enable Pins
Thermal Shutdown and Independent Current
Limit
Available in Thermally-Enhanced SON
Package: 3mm x 3mm x 1mm
DESCRIPTION
The TPS712xx family of low-dropout (LDO) voltage
regulators is tailored to noise-sensitive and RF appli-
cations. These products feature dual 250 mA LDOs
with ultralow noise, high power-supply rejection ratio
(PSRR), and fast transient and start-up response.
Each regulator output is stable with low-cost 2.2 碌F
ceramic output capacitors and features very low
dropout voltages (125 mV typical at 250 mA). Each
regulator achieves fast start-up times (approximately
60 碌s with a 0.001 碌F bypass capacitor) while
consuming very low quiescent current (300 碌A(chǔ) typical
with both outputs enabled). When the device is
placed in standby mode, the supply current is re-
duced to less than 0.3 碌A(chǔ) typical. Each regulator
exhibits approximately 32 碌Vrms of output voltage
noise with V
OUT
= 2.8 V and a 0.01 碌F noise
reduction (NR) capacitor. Applications with analog
components that are noise-sensitive, such as port-
able RF electronics, will benefit from high PSRR, low
noise, and fast line and load transient features. The
TPS712 family is offered in a thin 3mm x 3mm SON
package and is fully specified from -40擄C to +125擄C
(T
J
).
APPLICATIONS
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Cellular and Cordless Phones
Wireless PDA/Handheld Products
PCMCIA/Wireless LAN Applications
Digital Camera/Camcorder/Internet Audio
DSP/FPGA/ASIC/Controllers and Processors
PSRR (RIPPLE REJECTION) vs FREQUENCY
80
70
DRC PACKAGE
3mm x 3mm SON
(TOP VIEW)
IN 1
NC 2
OUT1 3
OUT2 4
GND 5
10 EN1
9 FB1/NC
8 EN2
7 FB2/NC
6 NR
60
PSRR (dB)
50
40
30
20
10
0
10
V
OUT
= 2.8 V
C
OUT
= 2.2
碌F
C
NR
= 0.01
碌
F
100
1k
10k
100k
1M
10M
I
OUT
= 1 mA
I
OUT
= 250 mA
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.
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 漏 2004鈥?005, Texas Instruments Incorporated
TPS71202 PDF文件相關(guān)型號(hào)
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