The World’s Smallest DC/DC Regulator

SEM-SC195B_v2

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Some BIG Ideas Are Really Small

The SC195B is a high efficiency, 500mA step down regulator designed to operate with an input voltage range of 2.9V to 5.5V. The input voltage range makes it ideal for battery operated applications with space limitations. The SC195B also includes fifteen programmable output voltage settings that can be selected using the four control pins, eliminating the need for external feedback resistors. The output voltage can be fixed to a single setting or dynamically switched between different levels. Pulling all four control pins low disables the output and puts the device into a low current shutdown state.

The SC195B operates at a fixed 3.5MHz switching frequency in normal pulse width modulation (PWM) mode. A variable frequency power save (PSAVE) mode is used to optimize efficiency at light loads for each output setting. Built-in hysteresis prevents chattering between the two modes.

The SC195B provides several protection features to safeguard the device under stressed conditions. These include short circuit protection, over-temperature protection, over-voltage protection, under-voltage lockout, and soft-start to control in-rush current. These features make it a versatile device ideal for step down regulation in products needing high efficiency and a small PCB footprint.

SEM-schematic

FEATURES
• Input voltage: 2.9V to 5.5V
• Output voltage: 0.8V to 3.6V
• Output current capability: 500mA
• Efficiency up to 94%
• 15 programmable output voltages
• High light load efficiency via automatic PSAVE mode
• Fast transient response
• Temperature range: -40°C to +85°C
• Oscillator frequency: 3.5MHz
• 100% duty cycle capability
• Quiescent current: 38?A typical
• Shutdown current: 0.1?A typical
• Internal soft-start
• Over-voltage protection
• Current limit and short circuit protection
• Over-temperature protection
• Under-voltage lockout
• Floating control pin protection
• WLCSP8-0.8 X 0.8 X 0.375mm package
APPLICATIONS
• MP3 and portable media players
• Personal navigation devices
• Camera power for smartphones, tablets, handhelds
• DC/DC modules
• WLAN/connectivity chipset power

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