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參數(shù)資料
| 型號： | SA57031-25UK |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
| 中文描述： | 2.5 V FIXED POSITIVE LDO REGULATOR, 0.29 V DROPOUT, PBGA4 |
| 封裝： | WL-CSP4, 4 PIN |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 161K |
| 代理商： | SA57031-25UK |
Philips Semiconductors
Product data
SA57031-XX
Micropower 150 mA, low-noise, low dropout linear
regulator with on/off
2003 Jun 23
8
TECHNICAL DISCUSSION
As illustrated in Figure 16, the SA57031 consists of a band-gap
voltage reference, an error amplifier, P-channel pass transistor,
current limit circuit and an internal feedback voltage divider. The
output voltage is fed back through an internal resistor voltage divider
connected to the V
O
pin.
The reference is connected to the error amplifier’s inverting input.
The error amplifier compares the reference with the feedback
voltage and amplifies the difference. If the feedback voltage is lower
than the reference voltage, the pass transistor’s gate is pulled lower,
which allows more current to pass to the output and increase the
output voltage. If the feedback voltage is too high, the pass
transistor gate is pulled up, allowing less current to pass to the
output, resulting in a decrease in output voltage.
SA00634
2
4
1
3
SA57031-XX
V
O
GND
ON/OFF
V
I
V
REF
CURRENT
LIMITER
Figure 16. Block diagram (bottom view).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SA57031-26UK | Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
| SA57031-27 | Ceramic Multilayer Capacitor; Capacitance:180pF; Capacitance Tolerance:+/- 5 %; Working Voltage, DC:50V; Dielectric Characteristic:C0G/NP0; Package/Case:0603; Series:VJ; Features:Multilayer Ceramic Chip Capacitor |
| SA57031-27UK | Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
| SA57031-28 | Ceramic Multilayer Capacitor; Capacitance:180pF; Capacitance Tolerance:+/- 5 %; Working Voltage, DC:100V; Dielectric Characteristic:C0G/NP0; Package/Case:0603; Series:VJ; Leaded Process Compatible:Yes; Mounting Type:Surface Mount |
| SA57031-28UK | Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA57031-26 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
| SA57031-26UK | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
| SA57031-27 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
| SA57031-27UK | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
| SA57031-28 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Micropower 150 mA, low-noise, low dropout linear regulator with on/off |
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