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參數(shù)資料
| 型號： | TPS76325DBV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS |
| 中文描述： | 低功耗150mA的低壓差線性穩(wěn)壓器 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 305K |
| 代理商： | TPS76325DBV |
SLVS181H DECEMBER 1998 REVISED JANUARY 2004
www.ti.com
13
APPLICATION INFORMATION
external capacitor requirements
Although not required, a 0.047
μ
F or larger ceramic bypass input capacitor, connected between IN and GND and located
close to the TPS763xx, 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 TPS763xx requires an output capacitor connected between OUT and GND to stabilize
the internal loop control. The minimum recommended capacitance value is 4.7
μ
F and the ESR (equivalent series
resistance) must be between 0.3
and 10
. Capacitor values 4.7
μ
F or larger are acceptable, provided the ESR is less
than 10
. 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.
CAPACITOR SELECTION
VALUE
KEMET
SPRAGUE
SPRAGUE
AVX
PART NO.
MFR.
MAX ESR
(1)
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
195D106x0016x2T
695D106x003562T
TPSC475K035R0600
(1)Size is in mm. ESR is maximum resistance in ohms at 100 kHz and TA = 25
°
C. Listings are sorted by height.
4.7
μ
F
10
μ
F
10
μ
F
4.7
μ
F
output voltage programming
The output voltage of the TPS76301 adjustable regulator is programmed using an external resistor divider as shown in
Figure 21. The output voltage is calculated using:
VO
0.995
Vref
1
R1
R2
(1)
Where:
V
ref
= 1.192 V typ (the internal reference voltage)
0.995 is a constant used to center the load regulator (1%)
Resistors R1 and R2 should be chosen for approximately 7-
μ
A divider current. Lower value resistors can be used but offer
no inherent advantage and waste more power. Higher values should be avoided as leakage currents at FB increase the
output voltage error. The recommended design procedure is to choose R2 = 169 k
to set the divider current at 7
μ
A and
then calculate R1 using:
R1
VO
0.995
Vref
1
R2
(2)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS76325DBVR | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 150mA 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 |
| TPS76325DBVRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Power 150-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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS76325DBVT | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 150mA 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 |
| TPS76325DBVTG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Power 150-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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS76325QDBVRG4Q1 | 功能描述:低壓差穩(wěn)壓器 - LDO Sgl Output LDO 150mA Fixed 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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