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參數(shù)資料
| 型號(hào)： | FAN5234QSCX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Mobile-Friendly PWM/PFM Controller |
| 中文描述： | SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁(yè)數(shù)： | 1/15頁(yè) |
| 文件大?。?/td> | 537K |
| 代理商： | FAN5234QSCX |
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www.fairchildsemi.com
REV. 1.0.10 5/3/04
Features
Wide input voltage range (2 to 24V) for Mobile systems
Excellent dynamic response with Voltage Feed-Forward
and Average Current Mode control
Lossless current sensing on low-side MOSFET or
precision over-current using sense resistor
VCC Under-voltage Lockout
Power-Good Signal
Light load Hysteretic mode maximizes efficiency
QSOP16, TSSOP16
300Khz or 600Khz operation
Applications
Mobile PC regulator
Hand-Held PC power
General Description
The FAN5234 PWM controller provides high efficiency and
regulation with an adjustable output from 0.9V to 5.5V that
are required to power I/O, chip-sets, memory banks or
peripherals in high-performance notebook computers, PDAs
and Internet appliances. Synchronous rectification and
hysteretic operation at light loads contribute to a high
efficiency over a wide range of loads. The hysteretic mode of
operation can be disabled if PWM mode is desired for all
load levels. Efficiency is even further enhanced by using
MOSFET’s R
DS(ON)
as a current sense component.
Feed-forward ramp modulation, average current mode
control, and internal feedback compensation provide fast
response to load transients. The FAN5234 monitors these
outputs and generates a PGOOD (power good) signal when
the soft-start is completed and the output is within ±10% of
its set point. A built-in over-voltage protection prevents the
output voltage from going above 120% of the set point.
Normal operation is automatically restored when the over-
voltage conditions go away. Under-voltage protection latches
the chip off when the output drops below 75% of its set value
after the soft-start sequence is completed. An adjustable
over-current function monitors the output current by sensing
the voltage drop across the lower MOSFET.
Typical Application
Figure 1. 1.8V Output Regulator (see Table 2, page 12 for BOM)
SW
FAN5234
10
C6
L1
Q1B
14
ILIM
1
4
R1
R2
11
VCC
+5
D1
+5
15
13
R3
12
C4
8
R5
PGOOD
2
+5
9
ISNS
PGND
Q1A
6
VSEN
LDRV
HDRV
BOOT
VIN
C5
C1
1.8V@3.5A
R4
VIN (BATTERY)
= 2 to 24V
C2
AGND
EN
3
SS1
7
C3
16
FPWM
VOUT
5
FAN5234
Mobile-Friendly PWM/PFM Controller
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FAN5234 | Terminal Block; Pitch Spacing:0.197"; Mounting Type:PC Board RoHS Compliant: Yes |
| FAN5235 | System Electronics Regulator for Mobile PCs |
| FAN5236MTC | Dual Mobile-Friendly DDR / Dual-output PWM Controller |
| FAN5236MTCX | Dual Mobile-Friendly DDR / Dual-output PWM Controller |
| FAN5236QSC | Dual Mobile-Friendly DDR / Dual-output PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN5235 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:System Electronics Regulator for Mobile PCs |
| FAN5235_CAB3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5235_CAB3116B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5235MTC | 功能描述:DC/DC 開(kāi)關(guān)控制器 Regulator System Electronics RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| FAN5235MTC_Q | 功能描述:DC/DC 開(kāi)關(guān)控制器 Regulator System Electronics RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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