Description
The HA16114P/FP/FPJ and HA16120FP/FPJ are single-channel PWM switching regulator controller ICs suitable for chopper-type DC/DC converters. Integrated totem-pole output circuits enable these ICs to drive the gate of a power MOSFET directly. The output logic of the HA16120 is designed to control a DC/DC step-up (boost) converter using an N-channel power MOS FET. The output logic of the HA16114 is designed to control a DC/DC step-down (buck) converter or inverting converter using a P-channel power MOS FET.

Features
•  Wide supply voltage range: 3.9 V to 40 V*
•  Maximum operating frequency: 600 kHz
•  Able to drive a power MOS FET (±1 A maximum peak current) by the built-in totem-pole gate predriver circuit
•  Can operate in synchronization with an external pulse signal, or with another controller IC
•  Pulse-by-pulse overcurrent limiting (OCL)
•  Intermittent operation under continuous overcurrent
•  Low quiescent current drain when shut off by grounding the ON/OFF pin
    HA16114: IOFF = 10 µA (max)
    HA16120: IOFF = 150 µA (max)
•  Externally trimmable reference voltage (Vref): ±0.2 V
•  Externally adjustable undervoltage lockout points (with respect to VIN)
•  Stable oscillator frequency
•  Soft start and quick shut function
Note: The reference voltage 2.5 V is under the condition of VIN ≥4.5 V.

Functions
•  2.5 V voltage reference
•  Sawtooth oscillator (Triangle wave)
•  Overcurrent detection
•  External synchronous input
•  Totem-pole output
•  Undervoltage lockout (UVL)
•  Error amplifier
•  Vref overvoltage protection (OVP)