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MB3817

Fujitsu Media Devices
Part Number MB3817
Manufacturer Fujitsu Media Devices
Description Switching Regulator Controller
Published Sep 11, 2005
Detailed Description FUJITSU SEMICONDUCTOR DATA SHEET DS04-27216-2E ASSP For Power Supply Applications BIPOLAR Switching Regulator Control...
Datasheet PDF File MB3817 PDF File

MB3817
MB3817

Overview
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) MB3817 s PIN ASSIGNMENT (TOP VIEW) CT 1 16 VREF RT +IN −IN 2 15 CTL 3 14 CSCP 4 13 CS FB 5 12 GND DTC 6 11 VE CB1 7 10 OUT CB2 8 9 V CC (FPT-16P-M05) 2 MB3817 s PIN DESCRIPTION Pin no.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin name CT RT +IN –IN FB DTC CB1 CB2 VCC OUT VE GND CS CSCP CTL VREF I/O — — I I O I — — — O — — — — I O Descriptions This pin connects to a capacitor for setting the triangular-wave frequency.
This pin connects to a resistor for setting the triangular-wave frequency.
Error amplifier non-inverted input pin Error amplifier inverted input pin Error amplifier output pin Dead time control pin Boot capacitor connection pin Boot capacitor connection pin Power supply pin Totem-pole type output pin Output current setting pin Ground pin Soft start setting capacitor connection pin Short detection setting capacitor...


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