参数资料
| 型号： | MIC5353-2.5YMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V .5A 6TMLF |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.5V |
| 输入电压： | 2.6 V ~ 6 V |
| 电压 - 压降（标准）： | 0.16V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 600mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-UFDFN 裸露焊盘，6-TMLF? |
| 供应商设备封装： | 6-TMLF?（1.6x1.6） |
| 包装： | 标准包装 |
| 其它名称： | 576-3980-6 |
Micrel, Inc.
Applications Information
Enable/Shutdown
The MIC5353 comes 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.
Input Capacitor
The MIC5353 is a high-performance, high bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. A 1μF capacitor is
required from the input-to-ground to provide stability.
MIC5353
A unique, quick-start circuit allows the MIC5353 to drive
a large capacitor on the bypass pin without significantly
slowing turn-on time.
No-Load Stability
Unlike many other voltage regulators, the MIC5353 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Adjustable Regulator Application
Adjustable regulators use the ratio of two resistors to
multiply the reference voltage to produce the desired
output voltage. The MIC5353 can be adjusted from
1.25V to 5.5V by using two external resistors (Figure 1).
The resistors set the output voltage based on the
following equation:
V OUT = V REF ? 1 +
?
Low-ESR ceramic capacitors provide optimal
performance at a minimum of space. The use of
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.
Output Capacitor
The MIC5353 requires an output capacitor of 1μF or
greater to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High-ESR
capacitors may cause high-frequency oscillation. The
output capacitor can be increased, although
performance has been optimized for a 1μF ceramic
V REF = 1.25V
?
?
R1 ?
R2 ?
output capacitor and doing so does not improve
significantly with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
performance. The 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 thereby
ensuring the same minimum capacitance over the
equivalent operating temperature range.
Bypass Capacitor
A capacitor can be placed from the noise bypass pin-to-
ground to reduce output voltage noise. The capacitor
bypasses the internal reference. A 0.1 μ F capacitor is
recommended for applications that require low-noise
outputs. The bypass capacitor can be increased, further
reducing noise and improving PSRR. Turn-on time
increases slightly with respect to bypass capacitance.
Figure 1. Adjustable Voltage Output
Thermal Considerations
The MIC5353 is designed to provide 500mA of
continuous current. Maximum ambient operating
temperature can be calculated based on the output
current and the voltage drop across the part. Given that
the input voltage is 3.3V, the output voltage is 2.8V and
the output current = 500mA.
The actual power dissipation of the regulator circuit can
be determined using the equation:
P D = (V IN – V OUT ) I OUT + V IN I GND
May 2010
7
M9999-052510
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5353-3.0YMT | 制造商:Micrel 功能描述:LDO Regulator 3V 0.5A |
| MIC5353-3.0YMT TR | 功能描述:低压差稳压器 - LDO 6Vin, Single 500mA ULDO in 1.6mm x 1.6mm Thin MLF RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MIC5353-3.0YMT-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 1 Output 3V 500mA 6-TMLF? (1.6x1.6) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 稳压器拓扑:正，固定式 电压 - 输出:3V 电流 - 输出:500mA 电压 - 跌落（典型值）:0.16V @ 500mA 稳压器数:1 电压 - 输入:最高 6V 电流 - 限制（最小值）:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商器件封装:6-TMLF?（1.6x1.6） 标准包装:1 |
| MIC5353-3.3YMT TR | 功能描述:低压差稳压器 - LDO 6Vin, Single 500mA ULDO in 1.6mm x 1.6mm Thin MLF RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MIC5353-3.3YMT-TR | 功能描述:Linear Voltage Regulator IC Positive Fixed 1 Output 3.3V 500mA 6-TMLF? (1.6x1.6) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 稳压器拓扑:正，固定式 电压 - 输出:3.3V 电流 - 输出:500mA 电压 - 跌落（典型值）:0.16V @ 500mA 稳压器数:1 电压 - 输入:最高 6V 电流 - 限制（最小值）:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商器件封装:6-TMLF?（1.6x1.6） 标准包装:1 |
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