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