Features: Fixed 175kHz Switching FrequencyConstant Frequency Voltage- Mode Control Requires No External CompensationHiccup-Mode Over-Current ProtectionHigh EfficiencyOutput Voltage Set By Resistor Divider Under-Voltage Lockout Soft-Start And EnableSynchronous RectificationSmall, 14-pin Surface Mou...
LX1684: Features: Fixed 175kHz Switching FrequencyConstant Frequency Voltage- Mode Control Requires No External CompensationHiccup-Mode Over-Current ProtectionHigh EfficiencyOutput Voltage Set By Resistor D...
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Supply Voltage (VC1) ......................................................................................18V
Supply Voltage (VCC) ........................................................................................7V
Input Voltage (CSP Pin)..................................................................................14V
Output Drive Peak Current Source (500ns)....................................................1.0A
Output Drive Peak Current Sink (500ns)........................................................1.0A
Input Voltage (SS/ENABLE Pin)...........................................................-0.3 to 6V
Operating Junction Temperature ..................................................................150°C
Storage Temperature ...................................................................-65°C to +150°C
Lead Temperature (Soldering 10 Seconds) ..................................................300°C
The LX1684 is a monolithic, voltage- mode pulse-width modulator controller. It is designed to mplement a flexible, low cost buck (step-down) regulator supply with a minimal of external components.
The LX1684 has a synchronous driver for higher efficiency and is optimized to provide 12V to 3.3V or 12V to 2.5V regulation. It also can be used to convert 5V or 3.3V to voltages as low as 1.25V. Switching frequency is fixed at 175kHz for optimal cost and space. Short-circuit current limiting can be implemented without expensive current sense resistors.