TPS2045A_TI 低电平有效的 0.25A 负载、0.5A ILIMIT、2.7-5.5V、80mΩ USB 电源开关

TPS2045A的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：USB 电源开关和充电端口控制器
功能描述：低电平有效的 0.25A 负载、0.5A ILIMIT、2.7-5.5V、80mΩ USB 电源开关
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TPS2045A的产品详情：

The TPS2045A through TPS2048A and TPS2055A through TPS2058A power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered.

These devices incorporate 80-m N-channel MOSFET high-side power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by an independent logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V.

When the output load exceeds the current-limit threshold or a short is present, these devices limit the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures the switch remains off until valid input voltage is present. These power-distribution switches are designed to current limit at 0.5 A.

TPS2045A的优势和特性：

80-m High-Side MOSFET Switch
250 mA Continuous Current Per Channel
Independent Thermal and Short-Circuit Protection With Overcurrent Logic Output
Operating Range: 2.7-V to 5.5-V
CMOS- and TTL-Compatible Enable Inputs
2.5-ms Typical Rise Time
Undervoltage Lockout
10 μA Maximum Standby Supply Current for Single and Dual (20 μA for Triple and Quad)
Bidirectional Switch
Ambient Temperature Range, 0°C to 85°C
ESD Protection

TPS2045A的参数（英文）：

Vin (Min) (V)
2.7
Vin (Max) (V)
5.5
Continuous current (Max) (A)
0.25
Current limit (A)
0.5
Product type
Fixed current limit, Power switch
Operating temperature range (C)
0 to 125
Enable
Active Low
Number of switches
1
Rating
Catalog

TPS2045A具体的完整产品型号参数及价格（美元）：

TPS2045A的完整型号有：TPS2045AD、TPS2045ADR，以下是这些产品的关键参数及官网采购报价：

TPS2045AD，工作温度：0 to 125，封装：SOIC (D)-8，包装数量MPQ：75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TPS2045AD的批量USD价格：.528（1000+）

TPS2045ADR，工作温度：0 to 125，封装：SOIC (D)-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TPS2045ADR的批量USD价格：.44（1000+）

TPS2045A的评估套件：

TPS2045A的电路图解：

TPS2045A的评估套件：