参数资料
| 型号： | MIC37152WR TR |
| 厂商： | Micrel Inc |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.5A SPAK-5 |
| 标准包装： | 750 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.24 V ~ 5.5 V |
| 输入电压： | 2.25 V ~ 6 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SPAK-5 |
| 供应商设备封装： | S-PAK-5 |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC37152WRTR MIC37152WRTR-ND |
Micrel, Inc.
load current variations and input voltage variations.
Large output capacitors are not required to obtain this
performance. A standard 10μF output capacitor,
preferably tantalum, is all that is required. Larger values
help to improve performance even further.
By virtue of its low dropout voltage, this device does not
saturate into dropout as readily as similar NPN-based
designs. When converting from 3.3V to 2.5V, 2.5V to
1.8V or 1.65V, or 2.5V to 1.5V, the NPN-based
regulators are already operating in dropout, with typical
dropout requirements of 1.2V or greater. To convert
down to 2.5V without operating in dropout, NPN-based
MIC37150/51/52/53
Enable Input
The MIC37151/37152/37153 also features an enable
input for on/off control of the device. Its shutdown state
draws “zero” current (only microamperes of leakage).
The enable input is TTL/CMOS compatible for simple
logic interface, but can be connected to up to V IN . When
enabled, it draws approximately 15μA.
Adjustable Regulator Design
MIC37152
regulators require an input voltage of 3.7V at the very
least. The MIC37150/51/52/53 regulator will provide
excellent performance with an input as low as 3.0V or
2.25V, respectively. This gives the PNP-based
regulators a distinct advantage over older, NPN-based
ENABLE
SHUTDOWN
V IN
IN
EN
OUT
ADJ
GND
R1
R2
V OUT
C OUT
linear regulators.
V OUT = 1.240V (1 + )
R1 = R2 ? ? OUT ? 1 ? ?
Minimum Load Current
The MIC37150/51/52/53 regulator is speci ? ed between
? nite loads. If the output current is too small, leakage
currents dominate and the output voltage rises. A 10mA
minimum load current is necessary for proper operation.
Error Flag
The MIC37151 and MIC37153 feature an error ? ag
circuit that monitors the output voltage and signals an
error condition when the voltage 5% below the nominal
output voltage. The error ? ag is an open-collector output
that can sink 10mA during a fault condition.
Low output voltage can be caused by a number of
problems, including an overcurrent fault (device in
current limit) or low input voltage. The ? ag is inoperative
during overtemperature shutdown.
R1
R2
Figure 1. Adjustable Regulator with Resistors
The MIC37152 and MIC37153 allow programming the
output voltage anywhere between 1.24V and the 5.5V
maximum operating rating of the family. Two resistors
are used. Resistors can be quite large, up to 1M ? ,
because of the very high input impedance and low bias
current of the sense comparator: The resistor values are
calculated by:
? V ?
? 1.240 ?
Where V OUT is the desired output voltage. Figure 1
shows component de ? nition. Applications with widely
varying load currents may scale the resistors to draw the
minimum load current required for proper operation (see
above).
October 2007
10
M9999-101907
相关PDF资料 |
PDF描述 |
|---|---|
| MIC37151-3.3WR TR | IC REG LDO 3.3V 1.5A SPAK-5 |
| MIC37151-2.5WR TR | IC REG LDO 2.5V 1.5A SPAK-5 |
| MIC37151-1.8WR TR | IC REG LDO 1.8V 1.5A SPAK-5 |
| MIC37151-1.65WR TR | IC REG LDO 1.65V 1.5A SPAK-5 |
| MIC37151-1.5WR TR | IC REG LDO 1.5V 1.5A SPAK-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC37152WU | 制造商:RF Micro Devices Inc 功能描述: |
| MIC37152YM | 功能描述:低压差稳压器 - LDO LV, 1.5A Cap LDO in SO-8 (Lead Free) 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 |
| MIC37152YM TR | 功能描述:低压差稳压器 - LDO LV, 1.5A Cap LDO in SO-8 (Lead Free) 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 |
| MIC37153 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.5A, Low Voltage μCap LDO Regulator |
| MIC37153YME | 功能描述:低压差稳压器 - LDO 1.5A Low Voltage 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 |
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