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.