The TPS55332 is a monolithic high-voltage switching regulator with integrated 3-A, 60-V power MOSFET. The device can be configured as a switch mode step-up power supply with voltage supervisor. Once the internal circuits have stabilized with a minimum input supply of 3.6 V, the system can then have an input voltage range from 1.5 V to 40 V, to maintain a fixed boost output voltage. For optimum performance, VIN/Vout ratios should be set such that the minimum required duty cycle pulse > 150 ns. The supervisor circuit monitors the regulated output and indicates when this output voltage has fallen below the set value. The TPS55332 has a switching frequency range from 80 kHz to 2.2 MHz, allowing the use of low profile inductors and low value input and output capacitors. The external loop compensation gives the user the flexibility to optimize the converter response for the appropriate operating conditions. Using the enable pin (EN), the shutdown supply current is reduced to 1 μA. The device has built-in protection features such soft start on enable cycle, pulse-by-pulse current limit, and thermal sensing and shutdown due to excessive power dissipation.
Feature
- Withstands Transients up to 60 V, Boost Input Operating Range of 1.5 V to 40 V (VIN)
- Peak Internal Switch Current: 5.7 A (typ)
- 2.5 V ± 1.5% Feedback Voltage Reference
- 80 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
- External Compensation for Wide Bandwidth Error Amplifier
- Programmable Power on Reset Delay
- Reset Function Filter Time for Fast Negative Transients
- Programmable Undervoltage Output Monitoring, Issuance of Reset if Output Falls Below Set Threshold
- Thermal Shutdown to Protect Device During Excessive Power Dissipation
- ILIM Threshold Protection (Current Limit)
- Operating Junction Temperature Range: –40°C to 150°C
- Thermally Enhanced 20-Pin HTSSOP PowerPAD Package
The TPS55332 is a monolithic high-voltage switching regulator with integrated 3-A, 60-V power MOSFET. The device can be configured as a switch mode step-up power supply with voltage supervisor. Once the internal circuits have stabilized with a minimum input supply of 3.6 V, the system can then have an input voltage range from 1.5 V to 40 V, to maintain a fixed boost output voltage. For optimum performance, VIN/Vout ratios should be set such that the minimum required duty cycle pulse > 150 ns. The supervisor circuit monitors the regulated output and indicates when this output voltage has fallen below the set value. The TPS55332 has a switching frequency range from 80 kHz to 2.2 MHz, allowing the use of low profile inductors and low value input and output capacitors. The external loop compensation gives the user the flexibility to optimize the converter response for the appropriate operating conditions. Using the enable pin (EN), the shutdown supply current is reduced to 1 μA. The device has built-in protection features such soft start on enable cycle, pulse-by-pulse current limit, and thermal sensing and shutdown due to excessive power dissipation.
