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參數(shù)資料
| 型號： | TPS796xxyyyz |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | ULTRALOW-NOISE, HIGH PSRR, FAST, RF, 1A LOW-DROPOUT LINEAR REGULATORS |
| 中文描述： | 超低噪聲，高PSRR，快速，射頻低壓差線性穩(wěn)壓器1A條 |
| 文件頁數(shù)： | 9/33頁 |
| 文件大小： | 899K |
| 代理商： | TPS796XXYYYZ |
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Regulator Protection
The TPS796xx PMOS-pass transistor has a built-in
back diode that conducts reverse current when the
input voltage drops below the output voltage (e.g.,
during power-down). Current is conducted from the
output to the input and is not internally limited. If
extended reverse voltage operation is anticipated,
external limiting might be appropriate.
R1
V
OUT
V
REF
1
R2
(2)
C1
(3 x 10
–7
) x (R1
(R1 x R2)
R2)
(3)
OUTPUT VOLTAGE
PROGRAMMING GUIDE
OUTPUT
VOLTAGE
R1
R2
C1
GND
FB
IN
OUT
EN
V
IN
V
OUT
R1
C1
R2
TPS79601
1
μ
F
1.8 V
3.6V
14.0 k
57.9 k
30.1 k
30.1 k
33 pF
15 pF
2.2
μ
F
TPS796xx
SLVS351I–SEPTEMBER 2002–REVISED MAY 2006
The recommended design procedure is to choose
R2 = 30.1k
to set the divider current at 40
μ
A, C1 =
15pF for stability, and then calculate R1 using
Equation 2
:
In order to improve the stability of the adjustable
version, it is suggested that a small compensation
capacitor be placed between OUT and FB. The
approximate value of this capacitor can be calculated
as
Equation 3
:
The TPS796xx features internal current limiting and
thermal protection. During normal operation, the
TPS796xx limits output current to approximately
2.8A. When current limiting engages, the output
voltage scales back linearly until the overcurrent
condition ends. While current limiting is designed to
prevent gross device failure, care should be taken
not to exceed the power dissipation ratings of the
package. If the temperature of the device exceeds
approximately +165
°
C, thermal-protection circuitry
shuts it down. Once the device has cooled down to
below approximately +140
°
C, regulator operation
resumes.
The suggested value of this capacitor for several
resistor ratios is shown in the table below (see
Figure 23
). If this capacitor is not used (such as in a
unity-gain
configuration)
recommended output capacitor is 2.2
μ
F instead of
1
μ
F.
then
the
minimum
Figure 23. TPS79601 Adjustable LDO Regulator Programming
9
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS79718DCKR | 功能描述:低壓差穩(wěn)壓器 - LDO 10mA 1.8V MicroPwr 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79718DCKRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO 10-mA 1.8-V LDO 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79718DCKT | 功能描述:低壓差穩(wěn)壓器 - LDO 10-mA 1.8-V LDO 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79718DCKTG4 | 功能描述:低壓差穩(wěn)壓器 - LDO 10-mA 1.8-V LDO 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79718MDCKREP | 功能描述:低壓差穩(wěn)壓器 - LDO EP Ultra Lo-Pwr 10Ma 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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