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參數(shù)資料
| 型號： | MC33566 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Smart Voltage Regulator for Peripheral Card Applications(用于PCI/NIC卡應(yīng)用的小型低壓差穩(wěn)壓器) |
| 中文描述： | 智能穩(wěn)壓器（用于的PCI /卡應(yīng)用的周邊網(wǎng)卡卡應(yīng)用的小型低壓差穩(wěn)壓器） |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 61K |
| 代理商： | MC33566 |
MC33566
http://onsemi.com
4
V
ref
Compensation
&
Hysteresis
+5 V
in
Ref &
Detect
5V detect
Comp
Driver
Drive out
+3.3 V
out
+3.3 V
aux
Hyst sw
External
Pchannel
MOSFET
+3.3 V
out
External
4.7
μ
F
cap
LDO
Figure 2. Functional Block Diagram
FUNCTIONAL DESCRIPTION
Input Blocking
The internal NPN pass transistor of the
LDO regulator ensures that no significant reverse current
will flow from +3.3 V
out
back to the +5.0 V
in
input when the
5.0 V input is not powered and the 3.3 V
in
supply is present.
5.0 Volt Detect
Internal circuitry detects the presence of
the 5.0 V input supply. When the 5.0 V supply drops below
a given threshold, the +3.3 V
in
bypass transistor (an external
Pchannel MOSFET) is enabled. The 5.0 V detect logic is
active throughout the entire range of rampup from 0 to
5.5 V. Additionally, the drive out signal is never turned ON
or OFF inappropriately during rampup of the +5.0 V
in
supply. Also, +3.3 V
out
never drops below 3.0 V while
+5.0 V
in
is above the 5.0 V detect minimum threshold.
Glitchfree Transfer
The design of the 5.0 V detect
circuitry and drive out control circuitry guarantees that the
+3.3 V
out
will not exceed the output voltage specification
listed in the table of DC Operating Specifications even with
+5.0 V
in
ramping up and down at the extremes of the slew
rates in the table of AC Operating Specifications.
Offset Voltage Performance
To ensure performance
when external offsets are present on the +5.0 V
in
and
+3.3 V
in
power inputs, the device has been designed to be
capable of operating with either one or both of these inputs
rising from or falling to zero volts, or with offsets of 0.05 V
to 0.9 V as the inputs ramp up and down.
Motherboard/
Mainboard
PCI Slot
Figure 3. Application Block Diagram
PCI Card
Circuitry
5V
3.3V aux
4.7
μ
F
1
V
A
U
X
2
V
I
N
3
G
N
D
4
V
O
5
D
R
4.7
μ
F
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC33761 | Ultra Low-Noise Low Dropout Voltage Regulator with 1.0 V ON/OFF Control(超低噪聲，帶1.0V開關(guān)控制的低壓差穩(wěn)壓器) |
| MC33765 | Very Low Dropout/Ultra Low Noise 5 Outputs Voltage Regulator(低壓差/超低噪聲5路輸出穩(wěn)壓器) |
| MC33884 | SWITCH MONITOR INTERFACE |
| MC33884DW | SWITCH MONITOR INTERFACE |
| MC33884DWR2 | SWITCH MONITOR INTERFACE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC33566D2T-001 | 制造商:ON Semiconductor 功能描述: 制造商:ON Semiconductor 功能描述:1.5A,Smart LDO for PCI/NIC Card 制造商:ON Semiconductor 功能描述:Smart Voltage Regulator for Peripheral Card Applications |
| MC33566D2T-1RK | 制造商:ON Semiconductor 功能描述: |
| MC33567D-001 | 功能描述:低壓差控制器 - LDO 1.5V/1.8V Output RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6 |
| MC33567D-002 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述: |
| MC33567D-1G | 功能描述:低壓差控制器 - LDO ANA DUAL LIN CNTR HI CUR RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6 |
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