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FAN5233 데이터시트 PDF




Fairchild Semiconductor에서 제조한 전자 부품 FAN5233은 전자 산업 및 응용 분야에서
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부품번호 FAN5233 기능
기능 System Electronics Regulator for Mobile PCs
제조업체 Fairchild Semiconductor
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FAN5233 데이터시트, 핀배열, 회로
www.fairchildsemi.com
FAN5233
System Electronics Regulator for Mobile PCs
Features
• 5.4V to 24V input voltage range
• Five regulated outputs:
• 5V @ 5A (PWM)
• 3.3V @ 5A (PWM)
• 5V @ 50mA Always On (Linear)
• 12V/Adjustable @ 120mA Boost (PWM)
• >96% efficiency
• Hysteretic mode for light loads
• PWM mode for normal loads
• Main regulators switch out of phase
• 300kHz fixed frequency switching
• RDS(ON) current sense over-current
• Reduced BOM; Max. efficiency
• Optional current sense resistor for precision over-current
detect
• Power Good signal for all voltages
• Input under-voltage lock-out (UVLO)
• Thermal shutdown
• ACPI compliant
• 24-pin TSSOP
Applications
• Notebook PCs
• Web tablets
• Battery-powered instruments
Description
The FAN5233 is a high efficiency and high precision
multiple-output voltage regulator for notebook PC and other
similar battery-powered applications. It integrates three
pulse-width modulated (PWM) switching regulator
controllers and one linear regulator to convert 5.4V-to-24V
notebook battery power into the voltage used by the circuitry
that surrounds the microprocessor in these systems.
The two primary PWM controllers in the FAN5233 use
synchronous-mode rectification to provide 3.3V and 5V at
over 5A each. They switch out-of-phase to minimize input
ripple-current. 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
variations. PWM control in normal operation and hysteretic
control under light load provides efficiency of greater than
95% over a wide range of input and output variations. The
third PWM controller generates 12V at 120mA. A propri-
etary technology is used for sensing of output current using
the RDS(ON) of the external MOSFETs, eliminating exter-
nal current sense resistors which saves board space and
reduces BOM cost.
One integrated linear regulator provides stand-by
ALWAYS-ON power at 5V for light (50mA) loads.
Additional FAN5233 features include over-voltage, under-
voltage, and over-current monitors and thermal shutdown
protection. A single Power-Good signal is issued when soft
start is completed and all outputs are within ±10% of their
settings.
REV. 1.0.6 1/22/02




FAN5233 pdf, 반도체, 판매, 대치품
FAN5233
PRODUCT SPECIFICATION
Absolute Maximum Ratings1
Parameter
Conditions
Min.
Typ.
Max.
Units
VIN
SW, ISEN Pins,SDWN Pin
-0.3 27 V
-0.3 27 V
CPUMP, HSD Pins
-0.3 33 V
SDN, VFB, V_always pins
-0.3 6.5 V
CPUMP to SW pins, and all other pins
-0.3 6.5 V
ILOAD 5V-Always
60 mA
Note:
1. Stresses beyond "Absolute Maximum Ratings" may cause permanent device damage. Continuous exposure to absolute
maximum rating conditions may affect device reliability. Functional operation of the device at these or any other conditions
beyond those indicated in the operational sections of the specification is not implied.
Recommended Operating Conditions
Input Voltage, VIN
Ambient Temperature, TA
+5.4V to 24V
-20°C to 85°C
Thermal Information
Thermal Resistance, RTHJA
Thermal Resistance, RTHJC
Maximum Junction Temperature
Storage Temperature Range
Maximum Lead Temperature, Soldering 10 Sec
88°C/W
16°C/W
150°C
-65°C to 150°C
300°C
ELECTRICAL SPECIFICATIONS
Operating Conditions
Recommended Operating Conditions Unless Noted Refers to Block Diagrams
Parameter
Supply
VIN Input Supply Voltage
Input Quiescent Current
Input UVLO Threshold
5V and 3.3V Main Regulators
Output Voltage Precision
Oscillator Frequency, fosc
HSD On-Resistance, pull up
HSD On Resistance pull down
LSD On-Resistance, pull up
Conditions
Min. Typ. Max. Units
(DC loading only) Note 1 5.4
24 V
H/LSD Open
1.4 3 mA
Stand-by
300 400
µA
Shut-down
<1 5 µA
Rising Vbat
4.3 4.7 5.1
V
hysteresis
100 mV
0.1 to 5.5A, 5.4 to 24V
-2
+2 %
255 300 345 kHz
7 12
4 10
6 9
4 REV. 1.0.6 1/22/02

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FAN5233 전자부품, 판매, 대치품
PRODUCT SPECIFICATION
FAN5233
REV. 1.0.6 1/22/02
7

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