Controllers | FAN5234

PWM/PFM Controller, Wide Input Voltage

Obsolete

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Overview

The FAN5234 PWM controller provides high efficiency and regulation with an adjustable output from 0.9V to 5.5V required to power I/O, chip-sets, memory banks, or peripherals in high-performance notebook computers, PDAs, and internet appliances. Synchronous rectification and hysteretic operation at light loads contribute to a high efficiency over a wide range of loads. The Hysteretic Mode of operation can be disabled if PWM Mode is desired for all load levels. Efficiency is further enhanced by using the MOSFET’s RDS(ON) as a current-sense component.
Feed-forward ramp modulation, average current mode control, and internal feedback compensation provide fast response to load transients. The FAN5234 monitors these outputs and generates a PGOOD (power-good) signal when the soft-start is completed and the output is within ±10% of its set point. A built-in over-voltage protection prevents the output voltage from going above 120% of the set point. Normal operation is automatically restored when the over-voltage conditions cease. Under-voltage protection latches the chip off when the output drops below 75% of its set value after the softstart sequence is completed. An adjustable over-current function monitors the output current by sensing the voltage drop across the lower MOSFET.

  • TBA

  • Wide Input Voltage Range for Mobile Systems:2 V to 24 V
  • Excellent Dynamic Response with Voltage Feed-Forward and Average-Current-Mode Control
  • Lossless Current Sensing on Low-Side MOSFET orPrecision Over-Current via Sense Resistor
  • VCC Under-Voltage Lockout
  • Power-Good Signal
  • Light-Load Hysteretic Mode Maximizes Efficiency
  • 300 KHz or 600 KHz Operation

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FAN5234MTCX

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Obsolete

CAD Model

Pb

A

H

P

TSSOP-16

948AH

1

260

REEL

2500

N

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Reliability Data

Die Related Summary Data

Device: FAN5234MTCX

Equivalent to wafer fab process: BB

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

BB

0

105155986

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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