Product Summary

The FAN5235 is a high efficiency and high precision DC/DC controller for notebook converters. Utilization of both input and output voltage feedback in a current-mode control allows for fast and stable loop response over a wide range of input and output voltage variations. The two main regulators switch out of phase to minimize input ripple current.

Parametrics

FAN5235 absolute maximum ratings: (1)VIN: -0.3 to 27 V; (2)SW, ISEN Pins,SDWN Pin: -0.3 to 27 V; (3)CPUMP, HSD Pins: -0.3 to 33 V; (4)SDN, VFB, V_always pins: -0.3 to 6.5 V; (5)CPUMP to SW pins, and all other pins: -0.3 to 6.5 V.

Features

FAN5235 features: (1)Synchronous rectification; (2)±1% precision internal reference; (3)>90% efficiency; (4)Input and output voltage feedback; (5)5.4V to 24V input voltage range; (6)Internally set 300kHz 5% oscillator; (7)5V and 3.3V Main outputs switch out of phase; (8)5V-ALWAYS and 3.3V-ALWAYS outputs; (9)Adjustable boost converter for 12V; (10)Boost converter slaved to 5V Main; (11)Input UVLO; (12)Outputs OVP of Buck Converters; (13)Precision current limit option for 5V, 3.3V Main; (14)Power Good Voltage Monitor.

Diagrams

FAN5235 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
FAN5235
FAN5235

Other


Data Sheet

Negotiable 
FAN5235MTC
FAN5235MTC

Fairchild Semiconductor

DC/DC Switching Controllers Regulator System Electronics

Data Sheet

0-1: $2.25
1-25: $1.88
25-100: $1.50
100-250: $1.35
FAN5235QSC
FAN5235QSC

Fairchild Semiconductor

DC/DC Switching Controllers Regulator System Electronics

Data Sheet

Negotiable 
FAN5235MTCX
FAN5235MTCX

Fairchild Semiconductor

DC/DC Switching Controllers Regulator System Electronics

Data Sheet

Negotiable 
FAN5235QSC_Q
FAN5235QSC_Q

Fairchild Semiconductor

DC/DC Switching Controllers Regulator System Electronics

Data Sheet

Negotiable 
FAN5235MTC_Q
FAN5235MTC_Q

Fairchild Semiconductor

DC/DC Switching Controllers Regulator System Electronics

Data Sheet

Negotiable 
FAN5235QSCX
FAN5235QSCX

Fairchild Semiconductor

DC/DC Switching Controllers Regulator System Electronics

Data Sheet

Negotiable