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参数资料
| 型号： | MP6401DGT-25BD3-LF-Z |
| 厂商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | FIXED POSITIVE LDO REGULATOR, PDSO6 |
| 封装： | 2 X 2 MM, MO-229WCCC, TQFN-6 |
| 文件页数： | 5/16页 |
| 文件大小： | 360K |
| 代理商： | MP6401DGT-25BD3-LF-Z |
MP6401 – 300mA LDO LINEAR REGULATOR WITH INTEGRATED RESET IC
MP6401 Rev. 0.9
www.MonolithicPower.com
13
11/2/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2009 MPS. All Rights Reserved.
APPLICATION INFORMATION
Adjustable Regulator Output
The OUT voltage of MP6401 has two modes
available (fixed and adjustable output voltage).
When ADJ pin is connected to GND, the regulator
works in fixed voltage mode. The regulator output
voltage will equal to preset voltage (1.8V, 2.5V or
3.3V options). In fixed voltage mode, the
impedance between ADJ and ground should
always be less than 50k. Generally, ADJ is
connected directly to ground.
When the ADJ pin is connected to the tap of an
external resistor divider, the regulator works in
adjustable voltage mode as shown in Fig 3. The
output voltage is selected by resistor divider, thus
12
OUT
2
RR
V
1.229
R
+
=×
In adjustable voltage mode, R2 equal to 13k is
recommended as a good tradeoff among stability,
accuracy and high-frequency PSRR. R2 should
be not greater than 100k.
Power Dissipation
The power dissipation for any package depends
on the thermal resistance of the case and circuit
board, the temperature difference between the
junction and ambient air, and the rate of airflow.
The power dissipation across the device can be
represented by the equation:
P = (VIN - VOUT) ×IOUT
The
allowable
power
dissipation
can
be
calculated using the following equation:
PD (MAX) = (TJ (MAX)-TA)/θJA
Where (TJ(MAX)-TA) is the temperature difference
between
the
junction
and
the
ambient
environment, θJA is the thermal resistance from
the junction to the ambient environment.
Connecting the GND pin of MP6401 to ground
using a large pad or ground plane helps to
channel heat away.
Output Capacitor Selection
The MP6401 is designed specifically to work with
very low ESR ceramic output capacitor 3.3uF
(min). For performance consideration, a large
ceramic capacitor such as 10uF is better. X7R or
X5R capacitor dielectric is recommended.
OUT Voltage Transient Immunity
The MP6401 can be immune to OUT pin short
negative transient. Typically, the immune duration
is 60us with 10mV overdriving. A shorter negative
transient can not make the RESET output assert.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MP6401DGT-33AD3-LF-P | 制造商:Monolithic Power Systems 功能描述:300MA LDO LINEAR REGULATORS WITH INTEGRATED RESET CIRCUIT - Tape and Reel 制造商:Monolithic Power Systems 功能描述:300mA LDO w/Int Reset Circuit |
| MP6401DGT-33AD3-LF-Z | 制造商:Monolithic Power Systems 功能描述:300MA LDO LINEAR REGULATORS WITH INTEGRATED RESET CIRCUIT - Tape and Reel 制造商:Monolithic Power Systems 功能描述:300mA LDO w/Int Reset Circuit |
| MP6401DGT-33BD3 | 制造商:MPS 制造商全称:Monolithic Power Systems 功能描述:300mA LDO Linear Regulator with Integrated Reset Circuit |
| MP6401DGT-33BD3-LF-P | 制造商:Monolithic Power Systems 功能描述:300MA LDO LINEAR REGULATORS WITH INTEGRATED RESET CIRCUIT - Tape and Reel 制造商:Monolithic Power Systems 功能描述:300mA LDO w/Int Reset Circuit |
| MP6401DGT-33BD3-LF-Z | 制造商:Monolithic Power Systems 功能描述:300MA LDO LINEAR REGULATORS WITH INTEGRATED RESET CIRCUIT - Tape and Reel 制造商:Monolithic Power Systems 功能描述:300mA LDO w/Int Reset Circuit |
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