欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: TPS73215DBVTG4
廠商: Texas Instruments, Inc.
元件分類: 基準電壓源/電流源
英文描述: Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
中文描述: 無電容,NMOS管,150mA的低壓差穩壓器的反向電流保護
文件頁數: 11/23頁
文件大小: 663K
代理商: TPS73215DBVTG4
www.ti.com
APPLICATION INFORMATION
INPUT AND OUTPUT CAPACITOR
REQUIREMENTS
Although an input capacitor is not required for
stability, it is good analog design practice to connect
a 0.1μF to 1μF low ESR capacitor across the input
supply near the regulator. This counteracts reactive
input sources and improves transient response,
noise rejection, and ripple rejection. A higher-value
capacitor may be necessary if large, fast rise-time
load transients are anticipated or the device is
located several inches from the power source.
TPS732xx
GND
EN
NR
IN
OUT
V
IN
V
OUT
Optional input capacitor.
May improve source
impedance, noise, or PSRR.
Optional output capacitor.
May improve load transient,
noise, or PSRR.
Optional bypass
capacitor to reduce
output noise.
OUTPUT NOISE
A precision band-gap reference is used to generate
the internal reference voltage, V
REF
. This reference is
the dominant noise source within the TPS732xx and
it generates
approximately
100kHz) at the reference output (NR). The regulator
control loop gains up the reference noise with the
same gain as the reference voltage, so that the noise
voltage of the regulator is approximately given by:
V
N
32 V
RMS
(R
1
R
2
)
R
2
32 V
RMS
V
OUT
V
REF
(1)
TPS732xx
GND
EN
FB
IN
OUT
V
IN
V
OUT
V
OUT
=
×
1.204
(R
1
+ R
2
)
R
1
R
1
C
FB
R
2
Optional input capacitor.
May improve source
impedance, noise, or PSRR.
Optional output capacitor.
May improve load transient,
noise, or PSRR.
Optional capacitor
reduces output noise
and improves
transient response.
V
N
( V
RMS
)
27
V
RMS
V
V
OUT
(V)
(2)
TPS732xx
SBVS037I–AUGUST 2003–REVISED MAY 2006
in addition to the internal 8k
resistor, presents the
same impedance to the error amp as the 27k
bandgap reference output. This impedance helps
compensate
for
leakages
terminals.
The TPS732xx belongs to a family of new generation
LDO regulators that use an NMOS pass transistor to
achieve
ultra-low-dropout
current blockage, and freedom from output capacitor
constraints. These features, combined with low noise
and an enable input, make the TPS732xx ideal for
portable applications. This regulator family offers a
wide selection of fixed output voltage versions and
an adjustable output version. All versions have
thermal
and
over-current
foldback current limit.
performance,
reverse
into
the
error
amp
protection,
including
Figure 31
shows the basic circuit connections for the
fixed
voltage
models.
connections
for
the
adjustable
(TPS73201).
Figure
32
output
gives
the
version
The TPS732xx does not require an output capacitor
for stability and has maximum phase margin with no
capacitor. It is designed to be stable for all available
types and values of capacitors. In applications where
V
IN
- V
OUT
< 0.5V and multiple low ESR capacitors
are in parallel, ringing may occur when the product of
C
OUT
and total ESR drops below 50n
F. Total ESR
includes all parasitic resistances, including capacitor
ESR and board, socket, and solder joint resistance.
In most applications, the sum of capacitor ESR and
trace resistance will meet this requirement.
Figure 31. Typical Application Circuit for
Fixed-Voltage Versions
32μVRMS
(10Hz
to
Since the value of V
REF
is 1.2V, this relationship
reduces to:
Figure 32. Typical Application Circuit for
Adjustable-Voltage Versions
for the case of no C
NR
.
An internal 27k
resistor in series with the noise
reduction pin (NR) forms a low-pass filter for the
voltage reference when an external noise reduction
capacitor, C
NR
, is connected from NR to ground. For
C
NR
= 10nF, the total noise in the 10Hz to 100kHz
bandwidth is reduced by a factor of ~3.2, giving the
approximate relationship:
R
and R
can be calculated for any output voltage
using the formula shown in
Figure 32
. Sample
resistor values for common output voltages are
shown in
Figure 2
.
For best accuracy, make the parallel combination of
R
1
and R
2
approximately euqal to 19k
. This 19k
,
11
Submit Documentation Feedback
相關PDF資料
PDF描述
TPS73230DCQG4 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
TPS732XX Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
TPS7348QPW LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED DELAYED RESET FUNCTION
TPS7330QPW LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED DELAYED RESET FUNCTION
TPS7350QPW LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED DELAYED RESET FUNCTION
相關代理商/技術參數
參數描述
TPS73215DCQ 功能描述:低壓差穩壓器 - LDO Cap-Free NMOS 250mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓(最大值):307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS73215DCQG4 功能描述:低壓差穩壓器 - LDO Cap-Free NMOS 250mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓(最大值):307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS73215DCQR 功能描述:低壓差穩壓器 - LDO Cap-Free NMOS 250mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓(最大值):307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS73215DCQRG4 功能描述:低壓差穩壓器 - LDO Cap-Free NMOS 250mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓(最大值):307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS73215MDBVREP 功能描述:低壓差穩壓器 - LDO Mil Enh Cap-Free NMOS 250-mA LDO Reg RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓(最大值):307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
主站蜘蛛池模板: 浦东新区| 屏南县| 临武县| 呼图壁县| 凤城市| 房山区| 芷江| 来安县| 扎赉特旗| 徐闻县| 高唐县| 抚远县| 宁蒗| 将乐县| 乾安县| 长海县| 邛崃市| 富宁县| 囊谦县| 福贡县| 井陉县| 沾益县| 呼和浩特市| 宜兰市| 左权县| 台南市| 义马市| 屏东市| 霍城县| 吉林市| 灵武市| 阿坝县| 大同市| 融水| 宜章县| 陇川县| 张掖市| 福安市| 沙湾县| 敖汉旗| 霍邱县|