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參數(shù)資料
| 型號(hào)： | TPS76425DBV |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW-POWER LOW-NOISE 150-mA LOW-DROPOUT LINEAR REGULATORS |
| 中文描述： | 低功耗低噪聲150mA的低壓差線性穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 11/15頁(yè) |
| 文件大?。?/td> | 235K |
| 代理商： | TPS76425DBV |
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TPS76425, TPS76427, TPS76428, TPS76430, TPS76433
LOW-POWER LOW-NOISE 150-mA LOW-DROPOUT LINEAR REGULATORS
SLVS180A – MARCH 1999 – REVISED JUNE 1999
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The TPS764xx family of low-noise and low-dropout (LDO) regulators are optimized for use in battery-operated
equipment. They feature extremely low noise (50
μ
V), low dropout voltages, low quiescent current (140
μ
A),
and an enable input to reduce supply current to less than 2
μ
A when the regulator is turned off.
device operation
The TPS764xx uses a PMOS pass element to dramatically reduce both dropout voltage and supply current over
more conventional PNP-pass-element LDO designs. The PMOS pass element is a voltage-controlled device
which, unlike a PNP transistor, does not require increased drive current as output current increases. Supply
current in the TPS764xx is essentially constant from no-load to maximum load.
Current limiting and thermal protection prevent damage by excessive output current and/or power dissipation.
The device switches into a constant-current mode at approximately 1 A; further load reduces the output voltage
instead of increasing the output current. The thermal protection shuts the regulator off if the junction temperature
rises above 165
°
C. Recovery is automatic when the junction temperature drops approximately 25
°
C below the
high temperature trip point. The PMOS pass element includes a back diode that safely conducts reverse current
when the input voltage level drops below the output voltage level.
An internal resistor, in conjunction with external 0.01-
μ
F bypass capacitor, creates a low-pass filter to further
reduce the noise. The TPS764xx exhibits only 50
μ
V of output voltage noise using 0.01
μ
F bypass and 4.7-
μ
F
output capacitors.
A logic low on the enable input, EN, shuts off the output and reduces the supply current to less than 2
μ
A. EN
should be tied high in applications where the shutdown feature is not used.
A typical application circuit is shown in Figure 22.
C1
1
μ
F
TPS76425, TPS76427 TPS76430, TPS76433.
BYPASS
OUT
1
3
IN
EN
GND
2
4
5
VI
CSR = 1
VO
4.7
μ
F
+
TPS764xx
0.01
μ
F
+
Figure 19. Typical Application Circuit
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS76425DBVR | 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(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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS76425DBVRG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Power 150-mA Low-Noise 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS76425DBVT | 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(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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS76425DBVT | 制造商:Texas Instruments 功能描述:IC V REG LDO 2.5V 150MA SOT-23-5 制造商:Texas Instruments 功能描述:IC, V REG, LDO, 2.5V, 150MA, SOT-23-5 |
| TPS76425DBVTG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low-Power 150-mA Low-Noise 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(lèi)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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