MB3817 Datasheet, PDF (1/29 Pages) Fujitsu Component Limited. – Switching Regulator Controller

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27216-2E
ASSP For Power Supply Applications
BIPOLAR
Switching Regulator Controller
MB3817
s DESCRIPTION
The MB3817 is a pulse width modulator (PWM) type switching regulator controller IC designed for low-voltage
and high-speed operation. This can be used in applications as down-conversion or down/up-conversion (Zeta
method).
With fewer external components and faster operating speed, the MB3817 enables reduction in power supply unit
size, making it ideal for use with internal power supplies in compact, high-performance portable devices.
s FEATURES
• Wide range of operating power supply voltages: 2.5 V to 18 V
• Built-in high-precision reference voltage generator: 1.5 V ± 2%
• High speed operation is possible: Max. 500 kHz
• Wide input voltage range of error amplifier: 0 to VCC – 0.9 V
• Built-in soft start function
• Built-in timer/latch-actuated short-circuiting protection circuit
• Totem-pole type output with adjustable on/off current (for PNP transistors)
• Built-in standby function
• Small package: SSOP-16P (FPT-16P-M05)
s PACKAGE
16-pin Plastic SSOP
(FPT-16P-M05)