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MIC39151-1.8BT 参数 Datasheet PDF下载

MIC39151-1.8BT图片预览
型号: MIC39151-1.8BT
PDF下载: 下载PDF文件 查看货源
内容描述: 1.5A低压低压降稳压器 [1.5A Low-Voltage Low-Dropout Regulator]
分类和应用: 稳压器
文件页数/大小: 12 页 / 108 K
品牌: MICREL [ MICREL SEMICONDUCTOR ]
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MIC39150/39151
Micrel
MIC39150/39151
1.5A Low-Voltage Low-Dropout Regulator
General Description
The MIC39150 and MIC39151 are 1.5A low-dropout linear
voltage regulators that provide a low voltage, high current
output with a minimum of external components. Utilizing
Micrel’s proprietary Super
βeta
PNP™ pass element, the
MIC39150/1 offers extremely low dropout (typically 375mV at
1.5A) and low ground current (typically 17mA at 1.5A).
The MIC39150/1 is ideal for PC add-in cards that need to
convert from 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed
maximum dropout voltage of 500mV over all operating con-
ditions allows the MIC39150/1 to provide 2.5V from a supply
as low as 3V or 1.8V from a supply as low as 2.3V. The
MIC39150/1 also has fast transient response for heavy
switching applications. This device requires only 10µF of
output capacitance to maintain stability and achieve fast
transient response
The MIC39150/1 is fully protected with overcurrent limiting,
thermal shutdown, reversed-battery protection, reversed-
lead insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag that
indicates undervoltage and over current conditions. Offered
in fixed voltages of 2.5V and 1.8V, the MIC39150/1 comes in
the TO-220 and TO-263 packages and is an ideal upgrade to
older, NPN-based linear voltage regulators.
Features
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5 to 1.8V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery and reversed lead insertion protection
• Reversed-leakage protection
• Fast transient response
• TO-263 and TO-220 packaging
• TTL/CMOS compatible enable pin (MIC39151 only)
• Error flag output (MIC39151 only)
Applications
Low-voltage digital ICs
LDO linear regulator for PC add-in cards
High-efficiency linear power supplies
SMPS post regulator
Low-voltage microcontrollers
StrongARM™ processor supply
For applications requiring input voltage greater than 16V or
automotive load dump protection, see the MIC29150/1/2/3
family.
Typical Application
MIC39150-2.5
V
IN
3.3V
IN
OUT
GND
V
OUT
2.5V
10µF
tantalum
ENABLE
SHUTDOWN
100kΩ
MIC39151-2.5
EN
IN
FLG
OUT
GND
ERROR FLAG
OUTPUT
V
IN
3.3V
V
OUT
2.5V
10µF
tantalum
MIC39150
MIC39151
StrongARM is a trademark of Advanced RSIC Machines, Ltd.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
May 2000
1
MIC39150/39151