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參數(shù)資料
| 型號： | TPS77028DBV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | ULTRA LOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS |
| 中文描述： | 超低功耗50 mA的低壓降線性穩(wěn)壓器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 230K |
| 代理商： | TPS77028DBV |
TPS77001, TPS77012, TPS77015, TPS77018, TPS77025
TPS77027, TPS77028, TPS77030, TPS77033, TPS77050
ULTRA LOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS
SLVS210C – JUNE 1999 – REVISED SEPTEMBER 1999
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
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 TPS770xx, 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 TPS770xx 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. ESR is maximum resistance in Ohms at 100 kHz and TA = 25
°
C. Contact manufacturer for minimum ESR values.
AVX
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS77028DBVR | 功能描述:低壓差穩(wěn)壓器 - LDO 2.8V 50mA 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 |
| TPS77028DBVRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Ultra Low-Power 50-mA 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 |
| TPS77028DBVT | 功能描述:低壓差穩(wěn)壓器 - LDO 2.8V 50mA 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 |
| TPS77028DBVTG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Ultra Low-Power 50-mA 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 |
| TPS77030DBVR | 功能描述:低壓差穩(wěn)壓器 - LDO 3.0V 50mA 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 |
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