The TPS22941/2/3/4/5 load switches provide protection to systems and loads in high-current conditions. The devices contain a 0.4-Ω current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. Current is prevented from flowing when the MOSFET is off. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS22941/2/3/4/5 includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch.
These devices provide an integrated, robust solution to provide current limiting the output current to a safe level by switching into a constant-current mode when the ouptut load exceeds the current-limit threshold. The OC logic output asserts low during overcurrent, undervoltage, or overtemperature conditions. These additional features make the TPS22941/2/3/4/5 an ideal solution for applications where current limiting is necessary.
This family of devices are available in a SC70-5 (DCK) package. It is characterized for operation over the free-air temperature range of –40°C to 85°C.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS22941 | SC70 (5) | 2.00mm × 2.10 mm |
TPS22942 | ||
TPS22943 | ||
TPS22944 | ||
TPS22945 |
Changes from C Revision (November 2009) to D Revision
DEVICE | MINIMUM CURRENT LIMIT (mA) | CURRENT LIMIT BLANKING TIME (ms) |
AUTO-RESTART TIME (ms) | ON PIN ACTIVITY |
---|---|---|---|---|
TPS22941 | 40 | 10 | 80 | Active LOW |
TPS22942 | 100 | 10 | 80 | Active LOW |
TPS22943 | 40 | 0 | N/A | Active HIGH |
TPS22944 | 100 | 0 | N/A | Active HIGH |
TPS22945 | 100 | 10 | 80 | Active HIGH |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | SOT (DCK) PIN NO. |
||
VOUT | 1 | O | Switch Output. Place ceramic bypass capacitor(s) between this terminal and GND. See the Application Information section for more information. |
GND | 2 | – | Ground |
OC | 3 | O | Over current output flag: active LOW, open drain output that indicates an over current, supply under voltage, or over temperature state. |
ON | 4 | I | Switch control input. Do not leave floating. |
VIN | 5 | I | Switch Input. Place ceramic bypass capacitor(s) between this terminal and GND. See the Application Information section for more information. |