參數(shù)資料
型號(hào)： TPS79628KTTR
廠商： Texas Instruments, Inc.
英文描述： ULTRALOW-NOISE, HIGH PSRR, FAST RF 1-A LOW-DROPOUT LINEAR REGULATORS
中文描述： 超低噪聲，高PSRR，快速射頻1 -低壓差線性穩(wěn)壓器
文件頁數(shù)： 10/18頁
文件大?。?/td> 560K
代理商： TPS79628KTTR
www.ti.com
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
VO
VREF
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
NR
FB
IN
OUT
EN
V
IN
V
OUT
R1
C1
R2
0.01
μ
F
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
TPS79601, TPS79618, TPS79625
TPS79628, TPS79630, TPS79633
SLVS351D–SEPTEMBER 2002–REVISED OCTOBER 2004
The recommended design procedure is to choose
R2 = 30.1 k
to set the divider current at 40 μA, C1 =
15 pF 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 2.8
A. 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 approxi-
mately 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)
ommended output capacitor is 2.2 μF instead of 1 μF.
then
the
minimum
rec-
Figure 23. TPS79601 Adjustable LDO Regulator Programming
10
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS79628KTTRG3 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 1A 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS79628KTTT 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 1A 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS79628KTTTG3 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 1A 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS79630DCQ 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 1A 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS79630DCQG4 功能描述:低壓差穩(wěn)壓器 - LDO High PSRR Fast RF High-Enable 1A 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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