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參數(shù)資料
| 型號： | TPS7333Q |
| 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 WITH INTEGRATED DELAYED RESET FUNCTION |
| 中文描述： | 低技術，集成延遲復位功能降穩(wěn)壓器 |
| 文件頁數(shù)： | 2/43頁 |
| 文件大小： | 638K |
| 代理商： | TPS7333Q |
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TPS7301Q, TPS7325Q, TPS7330Q, TPS7333Q, TPS7348Q, TPS7350Q
LOW-DROPOUT VOLTAGE REGULATORS
WITH INTEGRATED DELAYED RESET FUNCTION
SLVS124F – JUNE 1995 – REVISED JANUARY 1999
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
The RESET output of the TPS73xx initiates a reset in microcomputer and microprocessor systems in the event
of an undervoltage condition. An internal comparator in the TPS73xx monitors the output voltage of the regulator
to detect an undervoltage condition on the regulated output voltage.
If that occurs, the RESET output (open-drain NMOS) turns on, taking the RESET signal low. RESET stays low
for the duration of the undervoltage condition. Once the undervoltage condition ceases, a 200-ms (typ) time-out
begins. At the completion of the 200-ms delay, RESET goes high.
An order of magnitude reduction in dropout voltage and quiescent current over conventional LDO performance
is achieved by replacing the typical pnp pass transistor with a PMOS device.
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (maximum of 35 mV
at an output current of 100 mA for the TPS7350) and is directly proportional to the output current (see Figure 1).
Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is low and remains
constant, independent of output loading (typically 340
μ
A over the full range of output current, 0 mA to 500 mA).
These two key specifications yield a significant improvement in operating life for battery-powered systems.
The LDO family also features a sleep mode; applying a logic high signal to EN (enable) shuts down the regulator,
reducing the quiescent current to 0.5
μ
A maximum at T
J
= 25
°
C.
The TPS73xx is offered in 2.5-V, 3-V, 3.3-V, 4.85-V, and 5-V fixed-voltage versions and in an adjustable version
(programmable over the range of 1.2 V to 9.75 V). Output voltage tolerance is specified as a maximum of 2%
over line, load, and temperature ranges (3% for the 2.5 V and the adjustable version). The TPS73xx family is
available in PDIP (8 pin), SO (8 pin) and TSSOP (20 pin) packages. The TSSOP has a maximum height of
1.2 mm.
Figure 1. Dropout Voltage Versus Output Current
0.25
0.2
0.1
0.05
0
0.15
0
50
100 150 200 250 300
0.3
350 400 450 500
TA = 25
°
C
TPS7348
TPS7350
D
IO – Output Current – mA
TPS7333
TPS7330
TPS7325
Figure 2. Typical Application Configuration
TPS7325, TPS7330, TPS7333, TPS7348, TPS7350 (fixed-voltage
options)
Capacitor selection is nontrivial. See application information
section for details.
SENSE
RESET
OUT
OUT
9
8
6
10
IN
IN
IN
EN
GND
3
2
1
20
15
14
13
VI
0.1
μ
F
To System
Reset
250 k
CSR = 1
VO
10
μ
F
+
TPS73xxPW
CO
相關PDF資料 |
PDF描述 |
|---|---|
| TPS7348Q | LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED DELAYED RESET FUNCTION |
| TPS7333Y | LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED DELAYED RESET FUNCTION |
| TPS7325Y | LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED DELAYED RESET FUNCTION |
| TPS7348Y | LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED DELAYED RESET FUNCTION |
| TPS736XX_08 | Cap-Free, NMOS, 400mA Low-Dropout Regulator with Reverse Current Protection |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS7333QD | 功能描述:低壓差穩(wěn)壓器 - LDO Lowest Dropout PMOS 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 |
| TPS7333QD | 制造商:Texas Instruments 功能描述:IC VOLTAGE REGULATOR 制造商:Texas Instruments 功能描述:IC, VOLTAGE REGULATOR |
| TPS7333QD | 制造商:Texas Instruments 功能描述:IC's |
| TPS7333QDG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Lowest Dropout PMOS 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 |
| TPS7333QDR | 功能描述:低壓差穩(wěn)壓器 - LDO Lowest Dropout PMOS 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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