The HA16654A and HA16664A are PWM control switching regulator ICs which drive a power MOSFET at high speed and high frequency. The standby current is limited to as small as 1.5 mA (typ). These devices incorporate totem pole circuits suited for high-speed push-pull operation at the output stage, accomplishing high-speed switching with rising time tr= 80 ns (typ) and falling time tf= 40 ns (typ) at 20 V swing.

Functions

•  Reference voltage circuit

•  Triangular waveform oscillation circuit

•  PWM comparator circuit

•  Low-input malfunction protection circuit

•  Output drive circuit

•  Soft start and quick shut down

Features

•  High speed switching: tr= 80 ns, tf= 40 ns (typ) when use exernal driver circuit

•  High frequency operation:

   HA16654A (f = 100 kHz to 500 kHz)

   HA16664A (f = 100 kHz to 200 kHz)

   Low power dissipation : 2 mA max in standby state

•  5 V reference voltage

•  Low-input malfunction protection (High threshold voltage: 10 V Typ, Low threshold voltage: 8 V Typ)

•  Adjustable dead band width

•  Enlarged output pulse width control range (0 to 80%)

•  Soft start and quick shut down functions

•  Single output: totem pole