FAN5235QSC
FAN5235QSC Datasheet
FAN5235
| Part | Datasheet |
|---|---|
FAN5235QSC |
FAN5235QSC (pdf) |
| Related Parts | Information |
|---|---|
FAN5235QSCX |
FAN5235QSCX |
| PDF Datasheet Preview |
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| FAN5235 System Electronics Regulator for Mobile PCs • Synchronous • ±1% precision internal reference • >90% • Input and output voltage feedback • 5.4V to 24V input voltage range • Internally set 300kHz ±15% oscillator • 5V and 3.3V Main outputs switch out of phase • 5V-ALWAYS and 3.3V-ALWAYS outputs • Adjustable boost converter for 12V • Boost converter slaved to 5V Main • Input UVLO • Outputs OVP of Buck Converters • Precision current limit option for 5V, 3.3V Main • Power Good Voltage Monitor • Notebook PCs and PDAs • Hand-held portable instruments The FAN5235 is a high 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. Current sense based on MOSFET Rdson gives maximum while also permitting use of a sense resistor for high accuracy. An externally adjustable boost converter can be set to generate 12V. The FAN5235 is available in a 24-pin QSOP package, and in a 24-pin TSSOP package. 5V-ALWAYS 3.3V 5A + 50mA SDN3.3 PGOOD Vin = 5.4-24V FAN5235 1 VIN CPUMP5 24 2 ALW HSD5 23 3 CPUMP3.3 SW5 22 4 HSD3.3 ISEN5 21 5 SW3.3 6 5V-ALW 7 LSD3.3 8 GND3.3 9 ISEN3.3 LSD5 20 GND5 19 VFB5 18 SDN5 17 SW12 16 10 VFB3.3 11 SDN3.3 12 PGOOD VFB12 15 SGND 14 SDWN 13 SDN5 VFB12 SDWN 5V-ALWAYS 5V 5A + 12V 120mA + FAN5235 Pin Assignments VIN 3.3V-ALWAYS CPUMP3.3 HSD3.3 SW3.3 5V-ALWAYS LSD3.3 GND3.3 ISEN3.3 VFB3.3 SDN3.3 PGOOD Top View CPUMP5 HSD5 SW5 ISEN5 LSD5 GND5 VFB5 SDN5 SW12 VFB12 SGND SDWN Pin Description Pin Name VIN 3.3V-ALWAYS CPUMP3.3 HSD3.3 Ordering Information Product Number FAN5235QSC FAN5235MTC Package 24 Lead QSOP 24 Lead TSSOP DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, or c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1/3/02 0.0m 002 Stock#DS30005235 2001 Fairchild Semiconductor Corporation |
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