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| 型号： | MIC61300-10YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 13/22页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1V 3A 10-MLF |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1V |
| 输入电压： | 最高 3.6V |
| 电压 - 压降（标准）： | 0.15V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3.5A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘，10-MLF? |
| 供应商设备封装： | 10-MLF?（3x3） |
| 包装： | 标准包装 |
| 其它名称： | 576-3765-6 |
Micrel, Inc.
Adjustable Regulator Design
The MIC61300 adjustable version allows programming
the output voltage from 0.5V to 3.0V by placing a resistor
divider network (R1, R2) from V OUT to GND (see
Application Circuit). The high side of R1 should be
connected at the point-of-load for high-accuracy Kelvin
sensing. V OUT is determined by the following equation:
MIC61300
Thermal Design
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. To help reduce the thermal resistance,
the ePad (underneath the IC) should be soldered to the
PCB ground and the placement of thermal vias either
underneath or near the ePad is highly recommended.
Thermal design requires the following application-
V OUT = 0.5 × ?
+ 1 ?
? R1
? R2
?
?
Eq. 1
speci ? c parameters:
? Maximum ambient temperature (T A )
? Output current (I OUT )
where V OUT is the desired output voltage.
The resistor (R2) value between the FB pin and GND is
selected to maintain a minimum 10mA load on the
output.
The resistor values are calculated from the previous
equation, resulting in the following:
? Output voltage (V OUT )
? Input voltage (V IN )
? Ground current (I GND )
First, calculate the power dissipation of the regulator
from these numbers and the device parameters from this
datasheet:
R1 = R2 × ? ? OUT ? 1 ? ?
? V ?
? 0.5 ?
Eq. 2
P D = (V IN - V OUT ) × I OUT + (V IN × I GND ) Eq. 3
where the ground current is approximated by using
numbers from the Electrical Characteristics or Typical
Table 1 is a list of resistor combinations to set the output
voltage. A 1% tolerance is recommended for both R1
and R2. For a unity gain, 0.5V output voltage, connect
the FB pin directly to the output.
Characteristics sections
For example, given an expected maximum ambient
temperature (T A ) of 75 ° C with V IN = 1.2V, V OUT = 0.9V,
and I OUT = 1.5A, first calculate the expected P D using
Equation 1:
V OUT
0.5V
0.6V
0.7V
0.8V
0.9V
1.0
1.1V
1.2V
1.5V
1.8V
2.2V
R1
?
10.0 ?
20.0 ?
30.1 ?
40.2 ?
49.9 ?
60.4 ?
69.8 ?
100 ?
130 ?
169 ?
R2
49.9 ?
49.9 ?
49.9 ?
49.9 ?
49.9 ?
49.9 ?
49.9 ?
49.9 ?
49.9 ?
49.9 ?
49.9 ?
P D = (1.2V – 0.9V) × 1.5A + 1.2V × 0.015A
= 0.468W Eq. 4
Next, determnine the junction temperature for the
expected power dissipation above using the thermal
resistance ( θ JA ) of the 10-pin 3mm × 3mm MLF ? (YML)
adhering to the following criteria for the PCB design:
1oz. copper and 100mm 2 copper area for the
MIC61300.
T J = ( θ JA × P D ) + T A
= (60.7 ° C/W × 0.468W) + 75 ° C
= 103.4 ° C Eq. 5
Table 1. Resistor Selection for Specific V OUT
October 2011
13
M9999-101111-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC61300-10YMME | 功能描述:低压差稳压器 - LDO Low VIN, Single Supply, 3A LDO 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 |
| MIC61300-10YMME TR | 功能描述:低压差稳压器 - LDO Low VIN, Single Supply, 3A LDO 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 |
| MIC61300YML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Low Input Voltage, Single-Supply High-Current LDO |
| MIC61300YML TR | 功能描述:低压差稳压器 - LDO Low VIN, Single Supply, 3A LDO 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 |
| MIC61300YML-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 0.5 V ~ 3 V 3A 10-MLF? (3x3) 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，可调式 电压 - 输出:0.5 V ~ 3 V 电流 - 输出:3A 电压 - 跌落（典型值）:0.15V @ 3A 稳压器数:1 电压 - 输入:1.1 V ~ 3.6 V 电流 - 限制（最小值）:3.5A 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-VFDFN 裸露焊盘，10-MLF? 供应商器件封装:10-MLF?（3x3） 标准包装:1 |
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