DATA SHEET
TPS2597xx 具有精确电流监视器和瞬态过流消隐功能的 2.7V 至 23V、7A、9.8mΩ 电子保险丝
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1 特性
- 宽工作输入电压范围：2.7V 至 23V
- 绝对最大值为 28V
- 具有低导通电阻的集成 FET：RON = 9.8mΩ（典型值）
- 快速过压保护
- 过压钳位 (OVC)，可通过引脚选择阈值（3.89V、5.76V、13.88V），响应时间为 5μs（典型值），或
- 可调节过压锁定 (OVLO)，响应时间为 1.2μs（典型值）
- 过流保护，具有负载电流监控器输出 (ILM)
- 主动电流限制或断路器选项
- 可调节阈值 (ILIM) 0.87 A - 7.7 A
- ILIM > 1.74 A 时精度为 ±10%
- 可调瞬态消隐计时器 (ITIMER)，支持高达 2 × ILIM 的峰值电流
- 输出负载电流监控精度：±8%（最大值）
- 通过快速跳变响应实现短路保护
- 响应时间为 550ns（典型值）
- 可调节 (2 × ILIM) 和固定阈值
- 具有可调节欠压锁定阈值 (UVLO) 的高电平有效使能输入
- 可调节的输出压摆率控制 (dVdt)
- 过热保护
- 数字输出
- 故障指示 (FLT) 或
- 具有可调节阈值 (PGTH) 的电源正常状态指示 (PG)
- UL 2367 认证
- 文件编号 E339631
- RILM ≥ 750Ω
- 获得 IEC 62368-1 CB 认证
- 小尺寸：QFN 2mm × 2mm，0.45mm 间距
3 说明
TPS2597xx 系列电子保险丝是采用小型封装的高度集成电路保护和电源管理解决方案。此类器件只需很少的外部元件即可提供多种保护模式，能够非常有效地抵御过载、短路、电压浪涌和过多浪涌电流。
可以使用单个外部电容器来调节输出压摆率和浪涌电流。通过将输出钳制到安全的固定最大电压（可通过引脚选择）或在输入超过可调过压阈值时切断输出，可以保护负载免受输入过压情况的影响。此类器件通过主动限制电流或断开电路来响应输出过载。用户可以调节输出电流限制阈值以及瞬态过流消隐计时器。电流限制控制引脚还用作模拟负载电流监控器。
器件采用 2mm × 2mm 10 引脚 HotRod™ QFN 封装，旨在改善热性能并减小系统尺寸。
此类器件的额定工作结温范围为 –40°C 至 +125°C。
封装信息
| 器件型号 | 封装(1) | 封装尺寸（标称值） |
|---|---|---|
| TPS2597xxRPW | RPW（QFN，10） | 2.00mm × 2.00mm |
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。
简化原理图4 Revision History
Changes from Revision B (January 2022) to Revision C (April 2023)
- 更新了 UL/IEC 认证状态Go
Changes from Revision A (December 2021) to Revision B (January 2022)
- Added Thermal Information table to the documentGo
Changes from Revision * (November 2021) to Revision A (December 2021)
- 将状态从“预告信息”更改为“量产数据”Go
5 Device Comparison Table
| PART NUMBER | OVERVOLTAGE RESPONSE | OVERCURRENT RESPONSE | PG and PGTH |
FLT | RESPONSE TO FAULT |
|---|---|---|---|---|---|
|
TPS25970ARPW |
Adjustable OVLO |
Active Current Limit |
N |
Y |
Auto-Retry |
|
TPS25970LRPW |
Latch-Off |
||||
|
TPS25972ARPW |
Pin Selectable
OVC |
Y |
N |
Auto-Retry |
|
|
TPS25972LRPW |
Latch-Off |
||||
|
TPS25974ARPW |
Adjustable OVLO |
Circuit Breaker |
Auto-Retry |
||
|
TPS25974LRPW |
Latch-Off |
6 Pin Configuration and Functions
Figure 6-1 TPS2597xx RPW Package 10-Pin
QFN (Top View)Table 6-1 Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| EN/UVLO |
1 |
Analog Input | Active high enable for the device. A resistor divider on this pin from input supply to GND can be used to adjust the undervoltage lockout threshold. Do not leave floating. Refer to Undervoltage Lockout (UVLO and UVP) for details. |
|
OVLO |
2 |
Analog Input | TPS25970x and TPS25974x: A resistor divider on this pin from supply to GND can be used to adjust the overvoltage lockout threshold. This pin can also be used as an active low enable for the device. Do not leave floating. Refer to Overvoltage Lockout (OVLO) for details. |
|
OVCSEL |
Analog Input | TPS25972x: Overvoltage clamp threshold select pin. Refer to Overvoltage Clamp (OVC) for details. | |
|
PG |
3 |
Digital Output | TPS25972x and TPS25974x: Power-good indication. This is an open-drain signal, which is asserted high when the internal powerpath is fully turned ON and the PGTH input exceeds a certain threshold. Refer to Power Good Indication (PG) for more details. |
|
DNC |
Digital Output | TPS25970x: Can be left floating | |
|
FLT |
4 |
Digital Output | TPS25970x: Active low fault event indicator. This pin is an open-drain signal that is pulled low when a fault is detected. Refer to Fault Response and Indication (FLT) for more details. |
|
PGTH |
Analog Input | TPS25972x and TPS25974x: Power-good threshold. Refer to Power Good Indication (PG) for more details. | |
|
IN |
5 |
Power |
Power input |
|
OUT |
6 |
Power |
Power output |
|
DVDT |
7 |
Analog Output | A capacitor from this pin to GND sets the output turn on slew rate. Leave this pin floating for the fastest turn on slew rate. Refer to Slew Rate (dVdt) and Inrush Current Control for details. |
|
GND |
8 |
Ground |
This pin is the ground reference for all internal circuits and must be connected to system GND. |
|
ILM |
9 |
Analog Output | This pin is a dual function pin used to limit and monitor the output current. An external resistor from this pin to GND sets the output current limit threshold during start-up as well as steady state. The pin voltage can also be used as analog output load current monitor signal. Do not leave floating. Refer to Circuit-Breaker or Active Current Limiting for more details. |
|
ITIMER |
10 |
Analog Output | A capacitor from this pin to GND sets the overcurrent blanking interval during which the output current can temporarily exceed set current limit (but lower than fast-trip threshold) before the device overcurrent response takes action. Leave this pin open for the fastest response to overcurrent events. Refer to Circuit-Breaker or Active Current Limiting for more details. |
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
| Parameter | Pin | MIN | MAX | UNIT | |
|---|---|---|---|---|---|
| VIN | Maximum input voltage range, –40 ℃ ≤ TJ ≤ 125 ℃ | IN | –0.3 | 28 | V |
| VOUT | Maximum output voltage range, –40 ℃ ≤ TJ ≤ 125 ℃ | OUT | –0.3 | VIN + 0.3 | |
| VOUT,PLS | Minimum output voltage pulse (< 1 µs) | OUT | –0.8 | ||
| VEN/UVLO | Maximum Enable pin voltage range | EN/UVLO | –0.3 | 6.5 | V |
| VOV | Maximum OVCSEL/OVLO pin voltage range | OVCSEL/OVLO | –0.3 | 6.5 | V |
| VdVdT | Maximum dVdT pin voltage range | dVdt | Internally limited | V | |
| VITIMER | Maximum ITIMER pin voltage range | ITIMER | Internally limited |
V | |
| VPGTH | Maximum PGTH pin voltage range | PGTH | –0.3 | 6.5 | V |
| VPG | Maximum PG pin voltage range | PG | –0.3 | 6.5 | V |
| VFLTB | Maximum FLT pin voltage range | FLT | –0.3 | 6.5 | V |
| VILM | Maximum ILM pin voltage range | ILM | Internally limited |
V | |
| IMAX | Maximum continuous switch current | IN to OUT | Internally limited |
A | |
| TJ | Junction temperature | Internally limited |
°C | ||
| TLEAD | Maximum lead temperature | 300 | °C | ||
| Tstg | Storage temperature | –65 | 150 | °C | |
(1) Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions. If used outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime.
7.2 ESD Ratings
| VALUE | UNIT | |||
|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
| Charged device model (CDM), per ANSI/ESDA/JEDEC JS-002(2) | ±500 | |||
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
