1FEATURES
• 70-mΩ High-Side MOSFET
• 500-mA Continuous Current
• Thermal and Short-Circuit Protection
• Current Limit:
0.45 A (Min), 1.55 A (Max)
• Operating Range: 2.7 V to 5.5 V
• 0.6-ms Typical Rise Time
• Undervoltage Lockout
• Deglitched Fault Report (OC)
• No OC Glitch During Power Up
• Maximum Standby Supply Current: 1 μA
• Bidirectional Switch
• ESD Protection Level Per AEC-Q100
Classification
• UL Recognized, File Number E169910

APPLICATIONS
• Heavy Capacitive Loads
• Short-Circuit Protection

SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Military (–55°C/125°C)
Temperature Range
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability

DESCRIPTION
The TPS2041B power-distribution switch is intended for applications where heavy capacitive loads and short
circuits are likely to be encountered. This device incorporates 70-mΩ N-channel MOSFET power switches for
power-distribution systems that require multiple power switches in a single package. Each switch is controlled by
a 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, the device limits the output current
to a safe level by switching into a constant-current mode, pulling the overcurrent (OC) 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 that the switch remains
off until valid input voltage is present. This power-distribution switch is designed to set current limit at 1 A (typ).