- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385947 > TPS74815DRCT (Texas Instruments, Inc.) 1.5A LDO Linear Regulator with Programmable Soft-Start PDF資料下載
參數(shù)資料
| 型號： | TPS74815DRCT |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 1.5A LDO Linear Regulator with Programmable Soft-Start |
| 中文描述： | 1.5A的LDO線性穩(wěn)壓器，具有可編程軟啟動 |
| 文件頁數(shù)： | 10/19頁 |
| 文件大?。?/td> | 351K |
| 代理商： | TPS74815DRCT |
www.ti.com
APPLICATION INFORMATION
INPUT, OUTPUT, AND BIAS CAPACITOR
REQUIREMENTS
The device is designed to be stable for all available
types and values of output capacitors
≥
2.2
μ
F. The
device is also stable with multiple capacitors in
parallel, which can be of any type or value.
TRANSIENT RESPONSE
The TPS74801 was designed to have excellent
transient response within most applications with a
small amount of output capacitance. In some cases,
the transient response may be limited by the
transient response of the input supply. This limitation
is especially true in applications where the difference
between the input and output is less than 300mV. In
this
case,
adding
additional
improves the transient response much more than just
adding additional output capacitance would do. With
a
solid
input
supply,
adding
capacitance
reduces
undershoot
during a transient event; refer to
Figure 17
in the
Typical
Characteristics
TPS74801 is stable with output capacitors as low as
2.2
μ
F, many applications may then need very little
capacitance
at
the
LDO
applications,
local
bypass
powered device may be sufficient to meet the
transient requirements of the application. This design
reduces the total solution cost by avoiding the need
to use expensive, high-value capacitors at the LDO
output.
V
OUT
C
OUT
10 F
m
TPS74801
GND
EN
FB
IN
PG
BIAS
SS
OUT
V
IN
R
1
R
2
R
3
C
IN
1 F
m
C
SS
V
BIAS
C
BIAS
1 F
m
V
= 0.8
OUT
′
1 +
(
′
1.193
R
1
R
2
)
TPS74801
SBVS074–JANUARY 2007
The TPS74801 belongs to a family of low dropout
regulators that feature soft-start capability. These
regulators use a low current bias input to power all
internal control circuitry, allowing the NMOS pass
transistor to regulate very low input and output
voltages.
The use of an NMOS-pass FET offers several critical
advantages for many applications. Unlike a PMOS
topology device, the output capacitor has little effect
on
loop
stability.
This
TPS74801 to be stable with any capacitor type of
value 2.2
μ
F or greater. Transient response is also
superior to PMOS topologies, particularly for low V
IN
applications.
The capacitance required on the IN and BIAS pins is
strongly dependent on the input supply source
impedance. To counteract any inductance in the
input, the minimum recommended capacitor for V
IN
and V
BIAS
is 1
μ
F. If V
IN
and V
BIAS
are connected to
the
same
supply,
the
capacitor for V
is 4.7
μ
F. Good quality, low ESR
capacitors should be used on the input; ceramic X5R
and X7R capacitors are preferred. These capacitors
should be placed as close the pins as possible for
optimum performance.
architecture
allows
the
recommended
minimum
The
voltage-controlled soft-start circuit that provides a
smooth, monotonic start-up and limits startup inrush
currents that may be caused by large capacitive
loads. A power-good (PG) output is available to allow
supply monitoring and sequencing of other supplies.
An enable (EN) pin with hysteresis and deglitch
allows
slow-ramping
signals
sequencing the device. The low V
IN
and V
OUT
capability allows for inexpensive, easy-to-design, and
efficient linear regulation between the multiple supply
voltages
often
present
systems.
TPS74801
features
a
programmable
to
be
used
for
in
processor
intensive
input
capacitance
Figure 25
illustrates the typical application circuit for
the TPS74801 adjustable input device.
additional
and
output
overshoot
section.
Because
the
output.
capacitance
For
these
for
the
Figure 25. Typical Application Circuit for the
TPS74801 (Adjustable)
R
1
and R
2
can be calculated for any output voltage
using the formula shown in
Figure 25
. Refer to
Table 1
for sample resistor values of common output
voltages. In order to achieve the maximum accuracy
specifications, R
2
should be
≤
4.99k
.
10
Submit Documentation Feedback
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS76301(中文) | Low-Power 150-mA Low-Dropout Linear Regulators(低功耗,150mA低壓差線性穩(wěn)壓器) |
| TPS76318(中文) | Low-Power 150-mA Low-Dropout Linear Regulators(低功耗,150mA低壓差線性穩(wěn)壓器) |
| TPS76325(中文) | Low-Power 150-mA Low-Dropout Linear Regulators(低功耗,150mA低壓差線性穩(wěn)壓器) |
| TPS76333(中文) | Low-Power 150-mA Low-Dropout Linear Regulators(低功耗,150mA低壓差線性穩(wěn)壓器) |
| TPS76350(中文) | Low-Power 150-mA Low-Dropout Linear Regulators(低功耗,150mA低壓差線性穩(wěn)壓器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS74901DRCT | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 0.8 V ~ 3.6 V 3A 10-VSON (3x3) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):新產(chǎn)品 穩(wěn)壓器拓?fù)?正，可調(diào)式 電壓 - 輸出:0.8 V ~ 3.6 V 電流 - 輸出:3A 電壓 - 跌落（典型值）:0.12V @ 3A 穩(wěn)壓器數(shù):1 電壓 - 輸入:0.8 V ~ 5.5 V 電流 - 限制（最小值）:3.8A 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商器件封裝:10-VSON（3x3） 標(biāo)準(zhǔn)包裝:1 |
| TPS74901EVM-210 | 功能描述:電源管理IC開發(fā)工具 TPS74901EVM-210 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS74901KTWR | 功能描述:低壓差穩(wěn)壓器 - LDO 3.0A LDO Linear 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(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS74901KTWRG3 | 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output LDO 3.0A Adj. 0.8 to 3.6V 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(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS74901KTWT | 功能描述:低壓差穩(wěn)壓器 - LDO 3.0A LDO Linear 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(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。