HA16654A Datasheet, PDF (1/15 Pages) Hitachi Semiconductor – PWM Controlled Switching Regulator

HA16654A, HA16664A Series
PWM Controlled Switching Regulator
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 t_r = 80 ns (typ) and falling time t_f = 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: t_r = 80 ns, t_f = 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