- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299480 > MIC5376-2.8YMT (MICREL INC) 2.8 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, DSO4 PDF資料下載
參數(shù)資料
| 型號： | MIC5376-2.8YMT |
| 廠商： | MICREL INC |
| 元件分類： | 固定正電壓單路輸出LDO穩(wěn)壓器 |
| 英文描述： | 2.8 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, DSO4 |
| 封裝： | 1 X 1 MM, GREEN, MLF-4 |
| 文件頁數(shù)： | 17/18頁 |
| 文件大?。?/td> | 339K |
| 代理商： | MIC5376-2.8YMT |
Micrel, Inc.
MIC5375/6/7/8
January 2009
8
M9999-011309-B
Application Information
MIC5375/6/7/8 is Low noise 150mA LDO. The
MIC5376/8 includes an auto-discharge circuit that is
switched on when the regulator is disabled through the
enable pin. The MIC5375/6/7/8 regulator is protected
from damage due to fault conditions, offering linear
current limiting and thermal shutdown.
Input Capacitor
The
MIC5375/6/7/8
is
a
high-performance,
high
bandwidth device. An input capacitor of 1F is required
from the input to ground to provide stability. Low-ESR
ceramic capacitors provide optimal performance at a
minimum of space. Additional high-frequency capacitors,
such as small-valued NPO dielectric-type capacitors,
help filter out high-frequency noise and are good
practice in any RF-based circuit. X5R or X7R dielectrics
are recommended for the input capacitor. Y5V dielectrics
lose most of their capacitance over temperature and are
therefore, not recommended.
Output Capacitor
For output voltages ≥ 2.5V, the MIC5375/6/7/8 requires
a minimum 1F output capacitor. For output voltages
below 2.5V a 2.2F minimum output capacitor is
required. The design is optimized for use with low-ESR
ceramic chip capacitors. High ESR capacitors are not
recommended because they may cause high frequency
oscillation. The output capacitor can be increased, but
performance does not improve significantly with larger
capacitance.
X7R/X5R
dielectric-type
ceramic
capacitors
are
recommended
because
of
their
temperature
performance. X7R-type capacitors change capacitance
by 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 capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
No-Load Stability
Unlike many other voltage regulators, the MIC5375/6/7/8
will remain stable and in regulation with no load. This is
especially
important
in
CMOS
RAM
keep-alive
applications.
Enable/Shutdown
The MIC5375/6/7/8 is provided with an active-high
enable pin that allows the regulator to be disabled.
Forcing the enable pin low disables the regulator and
sends it into a “zero” off-mode-current state. In this state,
current consumed by the regulator goes nearly to zero.
Forcing the enable pin high enables the output voltage.
The active-high enable pin uses CMOS technology and
the enable pin cannot be left floating; a floating enable
pin may cause an indeterminate state on the output.
Adjustable Regulator Design
The MIC5377/8 adjustable version allows setting the
output voltage down to 1V with the use of two external
feedback resistors.
VIN
VOUT
ADJ
GND
U1 MIC5377/8-xxYMT
EN
C2
2.2F
6.3V
R1
619k
J3
VOUT
J4
GND
C1
2.2F
6.3V
2
1
4,5,6,8
7
3
J1
VIN
J5
EN
J2
GND
R2
267k
+
=
2
1
REF
OUT
R
1
V
Thermal Considerations
The MIC5375/6/7/8 is designed to provide 150mA of
continuous current in a very small package. Maximum
ambient operating temperature can be calculated based
on the output current and the voltage drop across the
part. For example if the input voltage is 3.6V, the output
voltage is 2.8V, and the output current = 150mA. The
actual power dissipation of the regulator circuit can be
determined using the equation:
PD = (VIN – VOUT1) I OUT + VIN IGND
Because this device is CMOS and the ground current is
typically <100A over the load range, the power
dissipation contributed by the ground current is < 1% and
can be ignored for this calculation.
PD = (3.6V – 2.8V) × 150mA
PD = 0.12W
To
determine
the
maximum
ambient
operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
=
JA
A
J(max)
D(max)
T
P
θ
TJ(max) = 125°C, the maximum junction temperature of the
die, θJA thermal resistance = 250°C/W for the YMT
package and 256.5°C/W for the SC-70-5 package.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC693MC | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| MIC9130YQSTR | SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO16 |
| MICD-095-06.00-SBR-TTL | INTERCONNECTION DEVICE |
| MICD-095-06.00-STL-TBL | INTERCONNECTION DEVICE |
| MICD-095-06.00-STR-TBL | INTERCONNECTION DEVICE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC5377YC5 TR | 功能描述:低壓差穩(wěn)壓器 - LDO Low Dropout Single 150mA LDO in 5ld SC70 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 |
| MIC5377YC5-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 1.5 V ~ 4.5 V 150mA SC-70-5 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?fù)?正，可調(diào)式 電壓 - 輸出:1.5 V ~ 4.5 V 電流 - 輸出:150mA 電壓 - 跌落（典型值）:0.12V @ 150mA 穩(wěn)壓器數(shù):1 電壓 - 輸入:2.5 V ~ 5.5 V 電流 - 限制（最小值）:200mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-TSSOP，SC-70-5，SOT-353 供應(yīng)商器件封裝:SC-70-5 標(biāo)準(zhǔn)包裝:1 |
| MIC5377YMT TR | 功能描述:低壓差穩(wěn)壓器 - LDO Low Dropout Single 150mA LDO in 1.2mm x 1.2mm TMLF 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 |
| MIC5377YMT-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 1.5 V ~ 4.5 V 150mA 8-TMLF? (1.2x1.2) 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 穩(wěn)壓器拓?fù)?正，可調(diào)式 電壓 - 輸出:1.5 V ~ 4.5 V 電流 - 輸出:150mA 電壓 - 跌落（典型值）:0.12V @ 150mA 穩(wěn)壓器數(shù):1 電壓 - 輸入:2.5 V ~ 5.5 V 電流 - 限制（最小值）:200mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-UFDFN 裸露焊盤，8-TMLF? 供應(yīng)商器件封裝:8-TMLF?（1.2x1.2） 標(biāo)準(zhǔn)包裝:1 |
| MIC5378YC5 TR | 功能描述:低壓差穩(wěn)壓器 - LDO Low Dropout Single 150mA LDO WITH Active Shutdown in 5ld SC70 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。