1FEATURES
2• Withstands Transients up to 60 V With an
Operating Range of 3.6 V to 48 V
• Asynchronous Switch Mode Regulator With
External Components (L and C), Load Current
up to 1 A (Maximum)
• 0.8 V ±1.5% Voltage Reference
• 200-kHz to 2.2-MHz Switching Frequency
• High Voltage Tolerant Enable Input for ON/OFF
State
• Soft Start on Enable Cycle
• Slew Rate Control on Internal Power Switch
• External Clock Input for Synchronization
• Pulse Skip Mode (PFM) During Light Output
Loads With Quiescent Current = 65 μA Typical
(LPM Operation)
• External Compensation for Wide Bandwidth
Error Amplifier
• Internal Undervoltage Lock Out UVLO
• Programmable Reset Power on Delay
• Reset Function Filter Time for Fast Negative
Transients
• Programmable Overvoltage Output Monitoring
• Programmable Undervoltage Output
Monitoring, Issuance of Reset if Output Falls
Below Threshold
• Switch Current Limit Protection
• Short Circuit and Overcurrent Protection of
FET
• Package: 20-pin HTSSOP PowerPAD™

APPLICATIONS
• Down-hole Drilling
• High Temperature Environments

SUPPORTS EXTREME TEMPERATURE
APPLICATIONS
• Controlled Baseline
• One Assembly and Test Site
• One Fabrication Site
• Available in Extreme (–55°C to 175°C)
Temperature Range
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
• Texas Instruments' high temperature products
utilize highly optimized silicon (die) solutions
with design and process enhancements to
maximize performance over extended
temperatures.

DESCRIPTION
The TPS54362 is a step down switch mode power supply with voltage supervisor. Integrated input voltage line
feed forward topology improves line transient regulation of the voltage mode buck regulator. The regulator has a
cycle-by cycle current limit. A pulse skip mode operation under no load reduces the supply current to 65 μA.
Using the enable pin, the supply shutdown current is reduced to 1 μA.
An open drain reset signal indicates when the nominal output drops below the threshold set by an external
resistor divider network. The output voltage start up ramp is controlled by a soft start capacitor. There is an
internal undervoltage shut down which is activated when the input supply ramps down to 2.6 V.