FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27216-4E
ASSP For Power Supply Applications
BIPOLAR
Switching Regulator Controller
MB3817
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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.
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FEATURES
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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 V to V
CC
−
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)
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PACKAGE
16-pin Plastic SSOP
(FPT-16P-M05)
FUJITSU [ FUJITSU COMPONENT LIMITED. ]
