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參數資料
| 型號： | FAN5230 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | System Electronics Regulator for Mobile PCs |
| 中文描述： | SWITCHED CAPACITOR REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | QSOP-24 |
| 文件頁數： | 12/16頁 |
| 文件大小： | 254K |
| 代理商： | FAN5230 |
FAN5230
12
REV. 2.8.5 10/17/01
Error Ampli
fi
er output voltage clamp
During a load transient the error amplifier voltage is allowed
full swing. After two clock cycles, if the amplifier is still out
of range the voltage and consequently the duty cycle (DC) is
clamped. The DC clamp automatically limits the build up of
over-currents during abnormal conditions, including short
circuits:
Figure 6. Duty-Cycle Clamp
Thermal shutdown
If the die temperature of the FAN5230 exceeds safe limits,
the IC shuts itself off. When the over-temperature (OT)
event ends, the IC comes back to normal operation. There is
a 25
°
C thermal hysteresis between shutdown and start up.
Input UVLO
If the input voltage falls below the UVLO threshold, the
FAN5230 turns itself off and stays off as long as Input
voltage is below threshold.
IC Protections Table
* Only the converter in Over-Voltage goes in SOFT CROW-
BAR mode.
EA
+
–
VFB=0.5V+Vo/8
VREF
VRAMP=0.5V+Vin/8
Vclamp=0.5V+
+Vo/8 +/-0.2V
2 Cycles
Counter
0.4V
–
+
–
+
HSD
Buck
LSD
Buck
LDO
LSD
Boost
OC/UV
(Bucks)
OC/UV
(LDO)
OV (Buck)*
OFF-LATCH
OFF-LATCH
ON
OFF-LATCH
"
"
OFF-LATCH
"
OFF
SOFT
CROWBAR
ON
ON
OV (Boost)
SDWN=0
OT
UV (Boost)
OC (Boost)
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF-LATCH OFF-LATCH
ON
OFF-LATCH
ON
ON
ON
33% DC
Generic Mobile System Block Diagram
Figure 7. System Block Diagram
CPU
PGOOD
5V
3.3V
5V-Always
3.3V-Always
SDN5
SDN3.3
RC5230
RC5231
Vcpu
1.5V
2.5V
μ
P
Clock
CPU
μ
C
8051
μ
C
PGOOD
SDWN
SDWN
Vin=5.6 to 24V
EN
PGOOD
μ
P CODE EXECUTION
RESET
LOGIC
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|---|---|
| FAN5230QSC | System Electronics Regulator for Mobile PCs |
| FAN5231 | Micropower 5V, 100mA Low Dropout Linear Regulator |
| FAN5231QSC | Analog IC |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN5230_CAC3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5230QSC | 功能描述:DC/DC 開關控制器 Regulator System Electronics RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5230QSC_Q | 功能描述:DC/DC 開關控制器 Regulator System Electronics RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5230QSCX | 功能描述:DC/DC 開關控制器 Regulator System Electronics RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| FAN5231 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Precision Dual PWM Controller And Linear Regulator for Notebook CPUs |
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