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TPS2057A

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低电平有效的 3 通道、0.25A 负载、0.5A ILIMIT、2.7-5.5V、80mΩ USB 电源开关

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TPS2057A

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产品详情

Product type Fixed current limit, Power switch Vin (max) (V) 5.5 Vin (min) (V) 2.7 Rating Catalog Number of channels 3 Operating temperature range (°C) 0 to 125 Current limit accuracy at 1 A 0.4 Enable Active High
Product type Fixed current limit, Power switch Vin (max) (V) 5.5 Vin (min) (V) 2.7 Rating Catalog Number of channels 3 Operating temperature range (°C) 0 to 125 Current limit accuracy at 1 A 0.4 Enable Active High
SOIC (D) 16 59.4 mm² (9.9 mm × 6 mm)
  • 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
  • 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

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.

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.
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TPS2553D 正在供货 高电平有效且具有反向阻断功能的 0.075-1.7A 可调节高电平有效、反向阻断并提供多种包装的 ILIMIT 2.5 至 6.5V、85mΩ USB 电源开关 This product offers similar functionality with single-channel adjustable current limit.

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 Current Limited Power-Distribution Switches 数据表 (Rev. C) 2008-1-15

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