TPS774_TI 具有电源正常指示功能的 250mA、10V、低压降稳压器

TPS774的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：线性和低压降 (LDO) 稳压器
功能描述：具有电源正常指示功能的 250mA、10V、低压降稳压器
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TPS774的产品详情：

The TPS773xx and TPS774xx are low-dropout regulators with integrated power-on reset and power good (PG) function respectively. These devices are capable of supplying 250 mA of output current with a dropout of 200 mV (TPS77333, TPS77433). Quiescent current is 92 uA at full load dropping down to 1 uA when device is disabled. These devices are optimized to be stable with a wide range of output capacitors including low ESR ceramic (10 uF) or low capacitance (1 uF) tantalum capacitors. These devices have extremely low noise output performance (55 uV_rms) without using any added filter capacitors. TPS773xx and TPS774xx are designed to have fast transient response for larger load current changes.

The TPS773xx or TPS774xx is offered in 1.5-V, 1.6 V (TPS77316 only), 1.8-V, 2.7-V, 2.8-V, 3.3-V, and 5.0-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.5 V to 5.5 V). Output voltage tolerance is 2% over line, load, and temperature ranges. The TPS773xx and TPS774xx families are available in 8-pin MSOP (DGK) packages.

Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 200 mV at an output current of 250 mA for 3.3-volt option) and is directly proportional to the output current. Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 92 uA over the full range of output current, 0 mA to 250 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems.

The device is enabled when the EN\ pin is connected to a low-level input voltage. This LDO family also features a sleep mode; applying a TTL high signal to EN\ (enable) shuts down the regulator, reducing the quiescent current to less than 1 uA at T _J = 25°C.

The TPS773xx features an integrated power-on reset, commonly used as a supply voltage supervisor (SVS), or reset output voltage. The RESET\ output of the TPS773xx initiates a reset in DSP, microcomputer or microprocessor systems at power up and in the event of an undervoltage condition. An internal comparator in the TPS773xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT reaches 95% of its regulated voltage, RESET\ will go to a high-impedance state after a 220-ms delay. RESET\ will go to low-impedance state when OUT is pulled below 95% (i.e. over load condition) of its regulated voltage.

For the TPS774xx, the power good terminal (PG) is an active high output, which can be used to implement a power-on reset or a low-battery indicator. An internal comparator in the TPS774xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT falls below 82% of its regulated voltage, PG will go to a low-impedance state. PG will go to a high-impedance state when OUT is above 82% of its regulated voltage.

TPS774的优势和特性：

Open Drain Power-On Reset With 220-ms Delay (TPS773xx)
Open Drain Power-Good (PG) Status Output (TPS774xx)
250-mA Low-Dropout Voltage Regulator
Available in 1.5-V, 1.6-V (TPS77316 Only), 1.8-V, 2.7-V, 2.8-V, 3.3-V, 5.0-V Fixed Output and Adjustable Versions
Dropout Voltage Typically 200 mV at 250 mA (TPS77333, TPS77433)
Ultralow 92-uA Quiescent Current (Typ)
8-Pin MSOP (DGK) Package
Low Noise (55 uVrms) Without an External Filter (Bypass) Capacitor (TPS77318, TPS77418)
2% Tolerance Over Specified Conditions For Fixed-Output Versions
Fast Transient Response
Thermal Shutdown Protection
See the TPS779xx Family of Devices for Active High Enable

TPS774的参数（英文）：

Output options
Adjustable Output, Fixed Output
Iout (Max) (A)
0.25
Vin (Max) (V)
10
Vin (Min) (V)
2.7
Vout (Max) (V)
5.5
Vout (Min) (V)
1.5
Fixed output options (V)
1.5, 1.8, 2.8, 3.3, 5
Noise (uVrms)
55
Iq (Typ) (mA)
0.09
Thermal resistance θJA (°C/W)
243
Rating
Catalog
Load capacitance (Min) (μF)
1
Regulated outputs (#)
1
Features
Enable, Power good
Accuracy (%)
2
PSRR @ 100 KHz (dB)
25
Dropout voltage (Vdo) (Typ) (mV)
200
Operating temperature range (C)
-40 to 125

TPS774具体的完整产品型号参数及价格（美元）：

TPS774的完整型号有：TPS77401DGK、TPS77415DGK、TPS77418DGK、TPS77428DGK、TPS77433DGK、TPS77433DGKR、TPS77450DGK，以下是这些产品的关键参数及官网采购报价：

TPS77401DGK，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：80个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS77401DGK的批量USD价格：.78（1000+）

TPS77415DGK，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：80个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS77415DGK的批量USD价格：.78（1000+）

TPS77418DGK，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：80个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS77418DGK的批量USD价格：.78（1000+）

TPS77428DGK，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：80个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS77428DGK的批量USD价格：.78（1000+）

TPS77433DGK，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：80个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS77433DGK的批量USD价格：.929（1000+）

TPS77433DGKR，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS77433DGKR的批量USD价格：.78（1000+）

TPS77450DGK，工作温度：-40 to 125，封装：VSSOP (DGK)-8，包装数量MPQ：80个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS77450DGK的批量USD价格：.78（1000+）

TPS774的评估套件：

TPS774的电路图解：

TPS774的评估套件：