The TPS40200 is a flexible nonsynchronous controller with a built-in 200-mA driver for P-channel FETs. The circuit operates with inputs up to 52V, with a power-saving feature that turns off driver current once the external FET has been fully turned on. This feature extends the flexibility of the device, allowing it to operate with an input voltage up to 52V, without dissipating excessive power. The circuit operates with voltage-mode feedback and has feed-forward input-voltage compensation that responds instantly to input-voltage change. The integral 700-mV reference is trimmed to 2%, providing the means to accurately control low voltages. The TPS40200 is available in an 8-pin SOIC, and supports many of the features of more complex controllers. Clock frequency, soft start, and overcurrent limit each are easily programmed by a single, external component. The part has undervoltage lockout, and can be easily synchronized to other controllers or a system clock to satisfy sequencing and/or noise-reduction requirements.

• Controlled Baseline
  • One Assembly/Test Site, One Fabrication Site
• Extended Temperature Performance of –55°C to 125°C
• Enhanced Diminishing Manufacturing Sources (DMS) Support
• Enhanced Product-Change Notification
• Qualification Pedigree(1)
• Input Voltage Range 4.5 V to 52 V
• Output Voltage (700 mV to 87% Vin)
• 200-mA Internal P-Channel FET Driver
• Voltage Feed-Forward Compensation
• Undervoltage Lockout
• Programmable Fixed-Frequency (35 kHz to 500 kHz) Operation
• Programmable Short-Circuit Protection
• Hiccup Overcurrent Fault Recovery
• Programmable Closed-Loop Soft Start
• 700-mV 1% Reference Voltage
• External Synchronization
• Small 8-Pin Small-Outline Integrated Circuit (SOIC) (D) Package