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參數(shù)資料
| 型號： | TPS79015DBVR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| 中文描述： | 三端固定電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 280K |
| 代理商： | TPS79015DBVR |
TPS79015, TPS79018, TPS79025, TPS79028, TPS79030
ULTRALOW-POWER LOW-NOISE 50 mA
LOW-DROPOUT LINEAR REGULATORS
SLVS299A – SEPTEMBER 2000 – REVISED SEPTEMBER 2000
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The TPS790xx family of low-dropout (LDO) regulators have been optimized for use in battery-operated
equipment. They feature extremely low dropout voltages, low quiescent current (17
μ
A typically), and enable
inputs to reduce supply currents to less than 1
μ
A when the regulators are turned off.
A typical application circuit is shown in Figure 21.
C1
1
μ
F
BYPASS
OUT
1
3
IN
EN
GND
2
4
5
VI
ESR = 0.2
VO
4.7
μ
F
+
TPS790xx
0.01
μ
F
Figure 26. Typical Application Circuit
external capacitor requirements
Although not required, a 0.047-
μ
F or larger ceramic input bypass capacitor, connected between IN and GND
and located close to the TPS790xx, is recommended to improve transient response and noise rejection. A
higher-value electrolytic input capacitor may be necessary if large, fast-rise-time load transients are anticipated
and the device is located several inches from the power source.
Like all low dropout regulators, the TPS790xx requires an output capacitor connected between OUT and GND
to stabilize the internal control loop. The minimum recommended capacitance is 4.7
μ
F. The ESR (equivalent
series resistance) of the capacitor should be between 0.2
and 10
. to ensure stability. Capacitor values larger
than 4.7
μ
F are acceptable, and allow the use of smaller ESR values. Capacitances less than 4.7
μ
F are not
recommended because they require careful selection of ESR to ensure stability. Solid tantalum electrolytic,
aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements
described above. Most of the commercially available 4.7
μ
F surface-mount solid tantalum capacitors, including
devices from Sprague, Kemet, and Nichico, meet the ESR requirements stated above. Multilayer ceramic
capacitors may have very small equivalent series resistances and may thus require the addition of a low value
series resistor to ensure stability.
CAPACITOR SELECTION
PART NO.
MFR.
VALUE
4.7
μ
F
10
μ
F
10
μ
F
4.7
μ
F
MAX ESR
1.5
1.5
1.3
0.6
SIZE (H
×
L
×
W)
1.9
×
3.5
×
2.8
1.3
×
7.0
×
2.7
2.5
×
7.6
×
2.5
2.6
×
6.0
×
3.2
T494B475K016AS
KEMET
195D106x0016x2T
SPRAGUE
695D106x003562T
SPRAGUE
TPSC475K035R0600
Size is in mm. The ESR maximum resistance is in Ohms at 100 kHz and TA = 25
°
C. Contact the
manufacturer for the minimum ESR values.
AVX
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| TPS79018DBVR | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| TPS79025DBVR | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| TPS79028DBVR | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| TPS79030DBVR | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| TPS79030DBVT | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS79015DBVRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Noise 50-mA 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79015DBVT | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Noise 50-mA 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79015DBVTG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Noise 50-mA 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79018DBVR | 功能描述:低壓差穩(wěn)壓器 - LDO 50mA 1.8V 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS79018DBVRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Noise 50-mA 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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