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參數(shù)資料
| 型號(hào)： | TS5201_07 |
| 廠商： | Taiwan Semiconductor Co., Ltd. |
| 英文描述： | 200mA Low Noise LDO Voltage Regulator with Enable |
| 中文描述： | 200mA低噪聲LDO穩(wěn)壓器的啟用 |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大小： | 267K |
| 代理商： | TS5201_07 |
TS5201
200mA Low Noise LDO
Voltage Regulator with Enable
Application Information
4/7
Version: A07
Enable Input
TS5201 series feature an active-high (>2V) enable (EN) input that allows ON/OFF control of the regulator. Current
drain reduces to “zero” when the device is shutdown, with only micro-amperes of leakage current. The EN is
compatible with CMOS logic interfacing. EN may be directly tied to V
IN
and pulled up to the maximum supply voltage.
Input Capacitor Requirement
An input capacitor of 0.1uF or greater is recommended when the device is more than 10” away from the bulk AC
supply capacitance or when the supply is a battery.
Output Capacitor Requirement
The TS5201 series requires an output capacitor to maintain stability and improve transient response is necessary.
2.2uF minimum is recommended. Larger values improve the regulator’s transient response. The output capacitor
value may be increased without limit.
The output capacitor should have an ESR (effective series resistance) less than 5
and a resonant frequency above
1MHz. Ultra low ESR capacitors can cause a low amplitude oscillation on the output and/or under damped transient
response. Most of tantalum or aluminum electrolytic capacitors are adequate; film types will work. Since many
aluminum electrolytic have electrolytes that freeze at about –30
o
C, solid tantalums are recommended for operation
below –25
o
C. At lower values of output current, less output capacitance is required for output stability. The capacitor
can be reduced to 0.47uF for current below 10mA or 0.33uF for currents below 1mA
.
Reference Bypass Capacitor
Bypass is connected to the internal voltage reference. A 470pF capacitor (C
BYPASS
) connected from Bypass to
Ground quiets this reference, providing a significant reduction in output noise. C
BYPASS
reduces the regulator phase
margin; when using C
BYPASS
, output capacitors of 2.2uF or greater are generally required to maintain stability.
The star up speed of the TS5201 is inversely proportional to the size of the reference bypass capacitor. Applications
requiring a slow ramp up of output voltage should consider larger values of C
BYPASS
. Likewise, if rapid turn on is
necessary, consider omitting C
BYPASS
. If output noise is not a major concern, omitted C
BYPASS
and leave Bypass open.
No Load Stability
The TS5201 series will remain stable and in regulation with no load, unlike many other voltage regulators. This is
especially important in CMOS RAM keep alive applications.
Adjustable Regulator Design
The adjustable regulator versions can be adjusted to a specific output voltage by using two external resistors to
programming the output voltage anywhere between 1.25 and the 8V maximum operating rating of the family.
Two resistors are used. Resistors can be quite large up to 470k
Ω
, because of the very high input impedance and low
bias current of the sense comparator, the resistor values are calculated by:
A capacitor from Adjust to Ground provides greatly improved noise performance.
Adjustable Version: V
OUT
= 1.24 (R1+R2)/R2
(Adjustable output range up to 8V)
off
EN
V
IN
V
OUT
C
OUT
2.2uF
on
R1
R2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS5201 | 200mA Low Noise LDO Voltage Regulator with Enable |
| TS5201_1 | 200mA Low Noise LDO Voltage Regulator with Enable |
| TS5201CS | 200mA Low Noise LDO Voltage Regulator with Enable |
| TS5204CY2.5 | 150mA Low Noise LDO Voltage Regulator |
| TS5204CY2.8 | 150mA Low Noise LDO Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS5201CS | 功能描述:低壓差穩(wěn)壓器 - LDO 200mA Low Noise LDO Vltg Reg Adj 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(dòng)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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TS5201CS RL | 制造商:SKMI/Taiwan 功能描述:SOP-8;200MA LOW NOISE LDO VOLT |
| TS5201CS25 RL | 制造商:SKMI/Taiwan 功能描述:SOP-8;200MA LOW NOISE LDO VOLT |
| TS5201CS30 RL | 制造商:SKMI/Taiwan 功能描述:SOP-8;200MA LOW NOISE LDO VOLT |
| TS5201CS33 RL | 制造商:SKMI/Taiwan 功能描述:SOP-8;200MA LOW NOISE LDO VOLT |
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