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參數(shù)資料
| 型號： | MIC5213-3.0BC5 |
| 廠商： | MICREL INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Teeny⑩ SC-70 レCap Low-Dropout Regulator Advance Information |
| 中文描述： | 3 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO5 |
| 封裝： | SC-70, 5 PIN |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 69K |
| 代理商： | MIC5213-3.0BC5 |
June 2000
7
MIC5213
MIC5213
Applications Information
Input Capacitor
A 0.1
μ
F capacitor should be placed from IN to GND if there
is more than 10 inches of wire between the input and the ac
filter capacitor or when a battery is used as the input.
Output Capacitor
Typical PNP based regulators require an output capacitor to
prevent oscillation. The MIC5213 is ultrastable, requiring only
0.47
μ
F of output capacitance for stability. The regulator is
stable with all types of capacitors, including the tiny, low-ESR
ceramic chip capacitors. The output capacitor value can be
increased without limit to improve transient response.
No-Load Stability
The MIC5213 will remain stable and in regulation with no load
(other than the internal voltage divider) unlike many other
voltage regulators. This is especially important in CMOS
RAM keep-alive applications.
Enable Input
The MIC5213 features nearly zero off-mode current. When
EN (enable input) is held below 0.6V, all internal circuitry is
powered off. Pulling EN high (over 2.0V) re-enables the
device and allows operation. When EN is held low, the
regulator typically draws only 10nA of current. While the logic
threshold is TTL/CMOS compatible, EN may be pulled as
high as 20V, independent of V
IN
.
Thermal Behavior
The MIC5213 is designed to provide 80mA of continuous
current in a very small profile packages. Maximum power
dissipation can be calculated based on the output current and
the voltage drop across the part. To determine the maximum
power dissipation of the package, use the junction-to-ambi-
ent thermal resistance of the device and the following basic
equation:
Micrel
P
T
T
D(max)
J(max)
A
JA
=
θ
T
J(max)
is the maximum junction temperature of the die,
125
°
C, and T
A
is the maximum ambient temperature.
θ
JA
is
the junction-to-ambient thermal resistance ambient of the
regulator. The
θ
JA
of the MIC5213 is 450
°
C/W.
The actual power dissipation of the regulator circuit can be
determined using one simple equation.
P
D
= (V
IN
–
V
OUT
) I
OUT
+ V
IN
×
I
GND
Substituting P
D(max)
, determined above, for P
D
and solving
for the operating conditions that are critical to the application
will give the maximum operating conditions for the regulator
circuit. For example, if we are operating the MIC5213-3.0BC5
at room temperature, with a minimum footprint layout, we can
determine the maximum input voltage for a set output current.
P
125
450 C / W
222mW
25
D(max)
=
P
D(max)
=
To prevent the device from entering thermal shutdown,
maximum power dissipation cannot be exceeded. Using the
output voltage of 3.0V, and an output current of 80mA, we can
determine the maximum input voltage. Ground current, maxi-
mum of 3mA for 80mA of output current, can be taken from
the
“
Electrical Characteristics
”
section of the data sheet.
222mW = (V
IN
–
3.0V) 80mA + V
IN
×
3mA
222mW = (80mA
×
V
IN
+ 3mA
×
V
IN
)
–
240mW
462mW = 83mA
×
V
IN
V
IN
= 5.57V max.
Therefore, a 3.0V application at 80mA of output current can
accept a maximum input voltage of 5.6V in an SC-70-5
package. For a full discussion of heat sinking and thermal
effects on voltage regulators, refer to Regulator Thermals
section of Micrel
’
s Designing with Low-Dropout Voltage Regu-
latorshandbook.
Fixed Voltage Regulator
The MIC5213 is ideal for general-purpose voltage regulation
in any handheld device. Applications that are tight for space
can easily use the Teeny
SC-70 regulator which occupies
half the space of a SOT-23-5 regulator. The MIC5203 offers
a smaller system solution, only requiring a small multilayer
ceramic capacitor for stability.
MIC5213-x.x
IN
OUT
GND
0.47μF
V
OUT
3.0V
3.6V
Li-Ion
Cell
EN
Figure 1. Single-Cell Regulator
相關(guān)PDF資料 |
PDF描述 |
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| mic5213 | Teeny SC-70 μCap Low-Dropout Regulator(Teeny μCap技術(shù)SC-70封裝低壓差穩(wěn)壓器) |
| MIC5213 | Teeny⑩ SC-70 レCap Low-Dropout Regulator Advance Information |
| MIC5213-2.5BC5 | Teeny⑩ SC-70 レCap Low-Dropout Regulator Advance Information |
| MIC5213-2.8BC5 | Teeny⑩ SC-70 レCap Low-Dropout Regulator Advance Information |
| MIC5213-3.3BC5 | SC-70 μCap Low-Dropout Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC521330BC5TR | 制造商:Micrel Inc 功能描述: |
| MIC5213-5.0BC5 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Teeny SC-70 μCap Low-Dropout Regulator |
| MIC5213-5.0BC5 TR | 功能描述:IC REG LDO 5V 80MA SC70-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:Teeny™ 標(biāo)準(zhǔn)包裝:500 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:500mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應(yīng)商設(shè)備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5213-5.0YC5 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Teeny SC-70 μCap Low-Dropout Regulator |
| MIC5213-5.0YC5 TR | 功能描述:低壓差穩(wěn)壓器 - LDO 80mA uCap LDO in SC70-5 Package(Lead Free) 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(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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