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參數(shù)資料
| 型號： | MIC69153YME |
| 廠商： | MICREL INC |
| 元件分類： | 可調(diào)正電壓單路輸出LDO穩(wěn)壓器 |
| 英文描述： | 0.5 V-5.5 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PDSO8 |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 235K |
| 代理商： | MIC69153YME |
Micrel, Inc.
MIC69151/153
July 2010
7
M9999-071210-D
Application Information
The MIC69151/153 is an ultra-high performance low
dropout linear regulator designed for high current
applications requiring a fast transient response. It utilizes
a single input supply, perfect for low-voltage DC-to-DC
conversion. The MIC69151/153 requires a minimum
number of external components.
The MIC69151/153 regulator is fully protected from
damage due to fault conditions offering constant current
limiting and thermal shutdown.
Input Supply Voltage
VIN provides high current to the collector of the pass
transistor. The minimum input voltage is 1.65V allowing
conversion from low voltage supplies.
Output Capacitor
The MIC69151/153 requires a minimum of output
capacitance to maintain stability. However, proper
capacitor selection is important to ensure desired
transient response. The MIC69151/153 is specifically
designed to be stable with low ESR ceramic chip
capacitors. A 10F ceramic chip capacitor should satisfy
most applications. Output capacitor can be increased
without bound. See typical characteristics for examples
of load transient response.
X7R dielectric ceramic capacitors are recommended
because of their temperature performance. X7R-type
capacitors change capacitance by only 15% over their
operating temperature range and are the most stable
type of ceramic capacitors. Z5U and Y5V dielectric
capacitors change value by as much as 50% and 60%,
respectively over their operating temperature ranges. To
use a ceramic chip capacitor with Y5V dielectric the
value must be much higher than an X7R ceramic or a
tantalum capacitor to ensure the same capacitance
value over the operating temperature range. Tantalum
capacitors have a very stable dielectric (10% over their
operating temperature range) and can also be used with
this device.
Input Capacitor
An input capacitor of 1F or greater is recommended
when the device is more than 4 inches away from the
bulk supply capacitance or when the supply is a battery.
Small, surface mount, ceramic chip capacitors can be
used for the bypassing. The capacitor should be placed
within 1 inch of the device for optimal performance.
Larger values will help to improve ripple rejection by
bypassing the input to the regulator further improving the
integrity of the output voltage.
Minimum Load Current
The MIC69151/153 regulator is specified between finite
loads. If the output current is too small, leakage currents
dominate and the output voltage rises. A 10mA minimum
load current is necessary for proper operation.
Adjustable Regulator Design
The MIC69153 adjustable version allows programming
the output voltage anywhere between 0.5V and 5.5V
with two resistors. The resistor value between VOUT and
the adjust pin should not exceed 10k. Larger values
can cause instability. The resistor values are calculated
by:
+
=
1
R
0.5
V
2
1
OUT
Where VOUT is the desired output voltage.
Enable
The fixed output voltage versions of the MIC69151
feature an active high enable input (EN) that allows on-
off control of the regulator. Current drain reduces to near
“zero” when the device is shutdown, with only
microamperes of leakage current. EN may be directly
tied to VIN and pulled up to the maximum supply voltage.
Thermal Design
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. Thermal design requires the following
application-specific parameters:
Maximum ambient temperature (TA)
Output current (IOUT)
Output voltage (VOUT)
Input voltage (VIN)
Ground current (IGND)
First, calculate the power dissipation of the regulator
from these numbers and the device parameters from this
data sheet.
PD = (VIN – VOUT) IOUT + VIN IGND
where the ground current is approximated by using
numbers from the “Electrical Characteristics” or “Typical
Characteristics” sections. The maximum allowable
power dissipation of any TA (ambient temperature) is
PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum
allowable power dissipation will result in excessive die
temperature and the regulator will go into thermal
shutdown.
Refer to “Application Note 9” for further details and
examples on thermal design and heat sink applications.
相關PDF資料 |
PDF描述 |
|---|---|
| MIC69153YML | 0.5 V-5.5 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PDSO10 |
| MICD-095-06.00-SBR-SBR | INTERCONNECTION DEVICE |
| MICD-095-06.00-SED-TBL | INTERCONNECTION DEVICE |
| MICD-095-06.00-SED-TEU | INTERCONNECTION DEVICE |
| MICD-095-06.00-SEU-STL | INTERCONNECTION DEVICE |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MIC69153YME TR | 功能描述:低壓差穩(wěn)壓器 - LDO Single Supply VIN, Low VIN, Low VOUT, 1.5A LDO 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 |
| MIC69153YME-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 0.5 V ~ 5.5 V 1.5A 8-SOIC-EP 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 穩(wěn)壓器拓撲:正，可調(diào)式 電壓 - 輸出:0.5 V ~ 5.5 V 電流 - 輸出:1.5A 電壓 - 跌落（典型值）:0.25V @ 1.5A 穩(wěn)壓器數(shù):1 電壓 - 輸入:1.65 V ~ 5.5 V 電流 - 限制（最小值）:1.7A 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬）裸焊盤 供應商器件封裝:8-SOIC-EP 標準包裝:1 |
| MIC69153YML TR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.5A, Low VIN, Single Supply LDO 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 |
| MIC69153YMLTR | 制造商:Micrel 功能描述:LDO Regulator Pos 0.5V to 5.5V 1.5A |
| MIC69153YML-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 0.5 V ~ 5.5 V 1.5A 10-MLF? (3x3) 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 穩(wěn)壓器拓撲:正，可調(diào)式 電壓 - 輸出:0.5 V ~ 5.5 V 電流 - 輸出:1.5A 電壓 - 跌落（典型值）:0.25V @ 1.5A 穩(wěn)壓器數(shù):1 電壓 - 輸入:1.65 V ~ 5.5 V 電流 - 限制（最小值）:1.7A 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤，10-MLF? 供應商器件封裝:10-MLF?（3x3） 標準包裝:1 |
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