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參數(shù)資料
| 型號： | MC33160 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | 100 mA, 5.0 V Voltage Regulator and Supervisory Circuit for Microprocessors(100 mA, 5.0 V電壓穩(wěn)壓器和微處理器監(jiān)控電路) |
| 中文描述： | 100毫安，5.0 V電壓調(diào)節(jié)器和微處理器監(jiān)控電路（100毫安，5.0V的電壓穩(wěn)壓器和微處理器監(jiān)控電路） |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 185K |
| 代理商： | MC33160 |
MC34160 MC33160
http://onsemi.com
7
OPERATING DESCRIPTION
The MC34160 series is a monolithic voltage regulator
and supervisory circuit containing many of the necessary
monitoring functions required in microprocessor based
systems. It is specifically designed for appliance and
industrial applications, offering the designer a cost
effective solution with minimal external components.
These devices are specified for operation over an input
voltage of 7.0 V to 40 V, and with a junction temperature
of
40
°
to +150
°
C. A typical microprocessor application is
shown in Figure 10.
Regulator
The 5.0 V regulator is designed to source in excess of
100 mA output current and is short circuit protected. The
output has a guaranteed tolerance of
±
5.0% over line, load,
and temperature. Internal thermal shutdown circuitry is
included to limit the maximum junction temperature to a
safe level. When activated, typically at 170
°
C, the
regulator output turns off.
In specific situations a combination of input and output
bypass capacitors may be required for regulator stability. If
the regulator is located an appreciable distance (
≥
4
″
) from
the supply filter, an input bypass capacitor (C
in
) of 0.33
μ
F
or greater is suggested. Output capacitance values of less
than 5.0 nF may cause regulator instability at light load (
≤
1.0 mA) and cold temperature. An output bypass capacitor
of 0.1
μ
F or greater is recommended to ensure stability
under all load conditions. The capacitors selected must
provide good high frequency characteristics.
Good construction techniques should be used to
minimize ground loops and lead resistance drops since the
regulator does not have external sense inputs.
Reference
The 2.6 V bandgap reference is short circuit protected
and has a guaranteed output tolerance of
±
5.0% over line,
load, and temperature. It is intended to be used in
conjunction with the Power Warning and Uncommitted
comparator. The reference can source in excess of 2.0 mA
and sink a maximum of 10
μ
A. For additional current
sinking capability, an external load resistor to ground must
be used.
Reference biasing is internally derived from either V
CC
or V
O
, allowing proper operation if either drops below
nominal.
Chip Disable
This input is used to switch the IC into a standby mode.
When activated, internal biasing for the entire die is
removed causing all outputs to turn off. This reduces the
power supply current (I
CC
) to less than 0.3 mA.
Comparators
Three separate comparators are incorporated for voltage
monitoring. Their outputs can provide diagnostic
information to the microprocessor, preventing system
malfunctions.
The Reset Comparator Inverting Input is internally
connected to the 2.6 V reference while the Noninverting
Input monitors V
O
. The Reset Output is active low when
V
O
falls approximately 180 mV below its regulated
voltage. To prevent erratic operation when crossing the
comparator threshold, 70 mV of hysteresis is provided.
The Power Warning Comparator is typically used to
detect an impending loss of system power. The Inverting
Input is internally connected to the reference, fixing the
threshold at 2.6 V. The input power source V
in
is monitored
by the Noninverting Input through the R
1
/R
2
divider
(Figure 10). This input features an adjustable 10
μ
A to 50
μ
A current sink I
H
that is programmed by the value selected
for resistor R
H
. A default current of 6.5
μ
A is provided if
R
H
is omitted. When the comparator input falls below 2.6
V, the current sink is activated. This produces hysteresis if
V
in
is monitored through a series resistor (R
1
). The
comparator thresholds are defined as follows:
R1
R
2
R1
R
2
1 +
I
IB
R
1
V
th(lower)
= V
ref
1 +
+ I
H
R
1
V
th(upper)
= V
ref
The nominal hysteresis current I
H
equals 1.2 V/R
H
(Figure 4).
The Uncommitted Comparator can be used to
synchronize the microprocessor with the ac line signal for
timing functions, or for synchronous load switching. It can
also be connected as a line loss detector as shown in
Figure 11. The comparator contains 200 mV of hysteresis
preventing erratic output behavior when crossing the input
threshold.
The Power Warning and Uncommitted Comparators
each have a transistor base
emitter connected across their
inputs. The base input normally connects to a voltage
reference while the emitter input connects to the voltage to
be monitored. The transistor limits the negative excursion
on the emitter input to
0.7 V below the base input by
supply current from V
CC
. This clamp current will prevent
forward biasing the IC substrate. Zener diodes are
connected to the comparator inputs to enhance the ICs
electrostatic discharge capability. Resistors R
1
and R
in
must limit the input current to a maximum of
±
2.0 mA.
Each comparator output consists of an open collector
NPN transistor capable of sinking 2.0 mA with a saturation
voltage less than 0.4 V, and standing off 40 V with minimal
leakage. Internal bias for the Reset and Power Warning
Comparators is derived from either V
CC
or the regulator
output to ensure functionality when either is below
nominal.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC33160 | 制造商:SPC Multicomp 功能描述:PTC Resettable Fuse |
| MC33160DW | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 5V 100mA Supervisor RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC33160DWG | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 5V 100mA Supervisor RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC33160DWR2 | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 5V 100mA Supervisor RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC33160DWR2G | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 5V 100mA Supervisor RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
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