- 您現在的位置：買賣IC網 > PDF目錄385947 > TPS7233Q (Texas Instruments, Inc.) Low-Dropout Voltage Regulators(微功耗，低壓差PMOS穩(wěn)壓器,工作溫度-55~150℃) PDF資料下載
參數資料
| 型號： | TPS7233Q |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Low-Dropout Voltage Regulators(微功耗，低壓差PMOS穩(wěn)壓器,工作溫度-55~150℃) |
| 中文描述： | 低壓差穩(wěn)壓器（微功耗，低壓差PMOS管穩(wěn)壓器，工作溫度-55?150℃） |
| 文件頁數： | 24/32頁 |
| 文件大?。?/td> | 826K |
| 代理商： | TPS7233Q |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
TPS7201Q, TPS7233Q, TPS7248Q, TPS7250Q
TPS7201Y, TPS7233Y, TPS7248Y, TPS7250Y
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102D – MARCH 1995 – REVISED DECEMBER 1995
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The design of the TPS72xx family of low-dropout (LDO) regulators is based on the higher-current TPS71xx
family. These new families of regulators have been optimized for use in battery-operated equipment and feature
extremely low dropout voltages, low supply currents that remain constant over the full-output-current range of
the device, and an enable input to reduce supply currents to less than 0.5
μ
A when the regulator is turned off.
device operation
The TPS72xx uses a PMOS pass element to dramatically reduce both dropout voltage and supply current over
more conventional PNP-pass-element LDO designs. The PMOS transistor is a voltage-controlled device and,
unlike a PNP transistor, does not require increased drive current as output current increases. Supply current
in the TPS72xx is essentially constant from no-load to maximum.
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 increases reduce 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 5
°
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.
A logic high on the enable input, EN, shuts off the output and reduces the supply current to less than 0.5
μ
A.
EN should be grounded in applications where the shutdown feature is not used.
Power good (PG) is an open-drain output signal used to indicate output-voltage status. A comparator circuit
continuously monitors the output voltage. When the output drops to approximately 95% of its nominal regulated
value, the comparator turns on and pulls PG low.
Transient loads or line pulses can also cause activation of PG if proper care is not taken in selecting the input
and output capacitors. Load transients that are faster than 5
μ
s can cause a signal on PG if high-ESR output
capacitors (greater than approximately 7
) are used. A 1-
μ
s transient causes a PG signal when using an output
capacitor with greater than 3.5
of ESR. It is interesting to note that the output-voltage spike during the transient
can drop well below the reset threshold and still not trip if the transient duration is short. A 1-
μ
s transient must
drop at least 500 mV below the threshold before tripping the PG circuit. A 2-
μ
s transient trips PG at just 400 mV
below the threshold. Lower-ESR output capacitors help by reducing the drop in output voltage during a transient
and should be used when fast transients are expected.
A typical application circuit is shown in Figure 33.
相關PDF資料 |
PDF描述 |
|---|---|
| TPS721A | LIGHT-RECEIVING DEVICE FOR PLASTIC FIBER/ POLYMER-CLAD FIBER |
| TPS7301Q(中文) | Low-Dropout Voltage Regulators With Integuated Delayed Reset Function(帶集成延遲復位功能的低壓差穩(wěn)壓器) |
| TPS7325Q(中文) | Low-Dropout Voltage Regulators With Integuated Delayed Reset Function(帶集成延遲復位功能的低壓差2.5V穩(wěn)壓器) |
| TPS7330Q(中文) | Low-Dropout Voltage Regulators With Integuated Delayed Reset Function(帶集成延遲復位功能的低壓差3.0V穩(wěn)壓器) |
| TPS7333Q(中文) | Low-Dropout Voltage Regulators With Integuated Delayed Reset Function(帶集成延遲復位功能的低壓差3.3V穩(wěn)壓器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS7233QD | 功能描述:低壓差穩(wěn)壓器 - LDO LDO PMOS Voltage 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 負載調節(jié):0.3 % 輸出端數量: 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 |
| TPS7233QD | 制造商:Texas Instruments 功能描述:IC's |
| TPS7233QD | 制造商:Texas Instruments 功能描述:IC V REG LDO 3.3V SOIC8 |
| TPS7233QDG4 | 功能描述:低壓差穩(wěn)壓器 - LDO LDO PMOS Voltage 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 負載調節(jié):0.3 % 輸出端數量: 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 |
| TPS7233QDR | 功能描述:低壓差穩(wěn)壓器 - LDO LDO PMOS Voltage 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 負載調節(jié):0.3 % 輸出端數量: 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。