FAN5230QSC Fairchild Semiconductor, FAN5230QSC Datasheet

IC CTRLR PWM MOBILE PC 24QSOP

FAN5230QSC

Manufacturer Part Number
FAN5230QSC
Description
IC CTRLR PWM MOBILE PC 24QSOP
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of FAN5230QSC

Applications
Converter, Mobile PCs
Voltage - Input
5.4 ~ 24 V
Number Of Outputs
5
Voltage - Output
3.3V, 5V, 12V, Adjustable
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-QSOP
Output Voltage
3.3 V, 5 V, 12 V
Input Voltage
5.4 V to 24 V
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 20 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
FAN5230QSC_NL
FAN5230QSC_NL

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FAN5230QSC
Manufacturer:
DALLAS
Quantity:
8
Part Number:
FAN5230QSCX
Manufacturer:
TI
Quantity:
3 000
Features
Applications
FAN5230
System Electronics Regulator for Mobile PCs
Description
www.fairchildsemi.com
REV. 2.8.5 10/17/01

Related parts for FAN5230QSC

FAN5230QSC Summary of contents

Page 1

FAN5230 System Electronics Regulator for Mobile PCs Features Applications www.fairchildsemi.com Description REV. 2.8.5 10/17/01 ...

Page 2

FAN5230 Typical Application 3.3V-ALWAYS@50mA 5V-ALWAYS 3. 5V-ALWAYS@ 50mA SDN3.3 PGOOD Pin Assignments 3.3V-ALWAYS 5V-ALWAYS Pin Description Pin Name Pin Number Pin Function Description VIN 1 Input power. 3.3V-ALWAYS 2 3.3V Always on linear regulator. Load current on ...

Page 3

Pin Description (Continued) Pin Name Pin Number Pin Function Description LSD3.3 7 Low-side gate driver for 3.3V. Connect this pin directly to the gate of an N-channel MOSFET. The trace from this pin to the MOSFET gate should be < ...

Page 4

FAN5230 Absolute Maximum Ratings Parameter V IN SW, ISEN Pins,SDWN Pin CPUMP, HSD Pins SDN, VFB, V_always pins CPUMP to SW pins, and all other pins The sum of the load currents on pins 2 and 6 must not exceed ...

Page 5

Operating Conditions (Continued) Parameter HSD On Output CPUMP GS HSD Off Output LSD On Output 5V-Always GS LSD Off Output Ramp Amplitude, pk-pk Ramp Offset Ramp Gain from V IN Error Amplifier ...

Page 6

FAN5230 Operating Conditions (Continued) Parameter Control Functions SDWN Off Voltage Max. SDWN On Voltage Min. Over-temperature Shutdown Over-temperature Hysteresis PGOOD Threshold PGOOD Sink Current PGOOD leakage +5V Analog Softstart +3.3V Analog Softstart Soft Start Current PGOOD Min Pulse ...

Page 7

REV. 2.8.5 10/17/01 FAN5230 7 ...

Page 8

FAN5230 VREF=2.5V R 16R V out – + VFB12 Figure 2. FAN5230 12V Internal Block Diagram LDO 3.3V ALWAYS 5V ALWAYS Figure 3. FAN5230 5V/3.3V—ALWAYS Internal Block Diagram 8 CK 12V Converter V e Ramp PWM CLK:3 Ramp ...

Page 9

Functional Description 3.3V and 5V Architecture 3.3V and 5V PWM Current Sensing 3.3V and 5V PWM Loop Compensation 3.3V and 5V PWM Current Limit REV. 2.8.5 10/17/01 µ µ Precision Current Limit HSD SW LSD ISEN GND Figure 4. Using ...

Page 10

FAN5230 MAIN 3.3V and 5V Softstart, Sequencing and Stand-by ALWAYS mode of Operation Sequencing Table 3V&5V SDN5 SDN3.3 SDWN ALWAYS ...

Page 11

Under-voltage Protection 12V Architecture 12V Loop Compensation 12V Protection 12V Softstart and Sequencing REV. 2.8.5 10/17/01 5V/3.3V-ALWAYS Operation 5V/3.3V-ALWAYS Protections Power good Vmain Vth PGOOD Tw Figure 5. PGOOD Timing Diagram FAN5230 ...

Page 12

FAN5230 Error Amplifier output voltage clamp VFB=0.5V+Vo/8 V RAMP =0.5V+Vin/8 – VREF Vclamp=0.5V+ +Vo/8 +/-0.2V 0.4V 2 Cycles Counter Figure 6. Duty-Cycle Clamp Thermal shutdown ° Generic Mobile System Block Diagram 5V SDN5 3.3V SDN3.3 RC5230 5V-Always PGOOD ...

Page 13

Notebook Application Circuit 3.3V@50mA C10 5V@50mA C11 3.3V@ C12, C13 Q2 SDN3.3 C3 +5V R1 PGOOD Figure 8. FAN5230 Notebook Application Circuit Table 1. FAN5230 Application Bill of Materials Reference Manufacturer, Part # C1 ...

Page 14

FAN5230 MOSFET Selection Table 2. MOSFET Duty Cycles High-side FET 5.4V out 3.3V .61 5V .43 Low-side FET 5.4V out 3.3V .34 5V .07 Efficiency 100 ...

Page 15

Mechanical Dimensions QSOP 24-Lead Inches Millimeters Symbol Min. Max. Min. 0.0532 1.35 A 0.0668 A1 0.0040 0.0098 0.1 A2 0.054 0.062 1.37 b 0.008 0.012 0.20 c 0.0075 0.0098 0.19 D 0.337 0.344 8.55 E 0.150 0.157 3.81 e 0.025 ...

Page 16

... FAN5230 Ordering Information Product Number Package FAN5230QSC 24 Lead QSOP 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 ...

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