MB3828 Datasheet, PDF (1/26 Pages) Fujitsu Component Limited. – Pentium DC/DC Converter IC

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27217-5E
ASSP For Power Supply Applications
Pentium^® DC/DC Converter IC
MB3828
s DESCRIPTION
The FUJITSU MB3828 is a pulse width modulation (PWM) DC/DC converter IC chip that provides a selection of
1.3 V to 3.5 V output voltages for Pentium^®* CPU’s, using a 5-bit input signal information.
The MB3828 utilizes synchronous rectification for high efficiency and features a soft-start/discharge control
function for ease in designing power supplies in multi-supply systems, making it ideal for Pentium^® power supply
systems.
* : Pentium is the registered trademark of Intel Corporation.
s FEATURES
• Highly efficient for using synchronous rectification scheme
• On-chip soft-start/discharge control circuit
• High precision output voltage: ±1.2%
• 5-bit, 32-step DAC: 3.5 V to 2.1 V in 100 mV steps
2.05 V to 1.3 V in 50 mV steps
• Frequency range: 100 kHz to 500 kHz using variable resistance (on-chip frequency setting capacitance)
• Standby current: 0 µA TYP
• On-chip PWRGOOD circuit for output voltage state detection
• Timer-latch short-circuit protection circuit, and overvoltage protection circuit for output protection
s PACKAGE
24-pin Plastic SSOP
(FPT-24P-M03)