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參數資料
| 型號： | FAN5233 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | System Electronics Regulator for Mobile PCs |
| 中文描述： | 系統的電子調節器移動PC |
| 文件頁數： | 12/15頁 |
| 文件大小： | 388K |
| 代理商： | FAN5233 |
FAN5233
PRODUCT SPECIFICATION
12
REV. 1.0.6 1/22/02
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 FAN5233 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
FAN5233 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
SDN5
SDN3.3
FAN5233
FAN5231
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
相關PDF資料 |
PDF描述 |
|---|---|
| FAN5233MTC | Analog IC |
| FAN5233MTCX | Analog IC |
| FAN5234MTC | Mobile-Friendly PWM/PFM Controller |
| FAN5234MTCX | Mobile-Friendly PWM/PFM Controller |
| FAN5234QSC | Mobile-Friendly PWM/PFM Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN5233MTC | 功能描述:開關變換器、穩壓器與控制器 DC/DC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN5233MTCX | 功能描述:開關變換器、穩壓器與控制器 PWM Buck Controller adjustable RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| FAN5234 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Dual Mobile-Friendly PWM / PFM Controller |
| FAN5234_10 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Dual Mobile-Friendly PWM / PFM Controller |
| FAN5234MTC | 功能描述:開關變換器、穩壓器與控制器 PWM Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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