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參數資料
| 型號： | FAN5234QSC |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 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 |
| 文件頁數： | 2/15頁 |
| 文件大小： | 537K |
| 代理商： | FAN5234QSC |
FAN5234
PRODUCT SPECIFICATION
REV. 1.0.10 5/3/04
2
Pin Configurations
Pin Definitions
Pin
Number
1
Pin Name
VIN
Pin Function Description
Input Voltage.
operating frequency for low input voltage operation. See Table 1.
Power Good Flag.
An open-drain output that will pull LOW when VSEN is outside of a
±10% range of the 0.9V reference.
ENABLE
. Enables operation when pulled to logic high. Toggling EN will also reset the
regulator after a latched fault condition. This is a CMOS inputs whose state is
indeterminate if left open.
Current Limit.
A resistor from this pin to GND sets the current limit.
Output Voltage.
Connect to output voltage. Used for regulation to ensure a smooth
transitions during mode changes. When VOUT is expected to exceed VCC, tie this pin to
VCC.
Output Voltage Sense.
The feedback from the output. Used for regulation as well as
PGOOD, under-voltage, and over-voltage protection and monitoring.
Soft Start.
A capacitor from this pin to GND programs the slew rate of the converter
during initialization. During initialization, this pin is charged with a 5
Analog Ground.
This is the signal ground reference for the IC. All voltage levels are
measured with respect to this pin.
Power Ground.
The return for the low-side MOSFET driver. Connect to source of low-
side MOSFET.
Low-Side Drive.
The low-side (lower) MOSFET driver output. Connect to gate of low-side
MOSFET.
VCC.
This pin powers the chip as well as the LDRV buffers. The IC starts to operate when
voltage on this pin exceeds 4.6V (UVLO rising) and shuts down when it drops below 4.3V
(UVLO falling).
Current Sense input.
Monitors the voltage drop across the lower MOSFET or external
sense resistor for current feedback.
Switching node.
Return for the high-side MOSFET driver and a current sense input.
Connect to source of high-side MOSFET and low-side MOSFET drain.
High-Side Drive.
High-side (upper) MOSFET driver output. Connect to gate of high-side
MOSFET.
BOOT.
Positive supply for the upper MOSFET driver. Connect as shown in Figure 2.
Forced PWM mode.
When logic HIGH, inhibits the regulator from entering hysteretic
mode.
Connect to main input power source (battery). Also used to program
2
PGOOD
3
EN
4
5
ILIM
VOUT
6
VSEN
7
SS
μ
A current source.
8
AGND
9
PGND
10
LDRV
11
VCC
12
ISNS
13
SW
14
HDRV
15
16
BOOT
FPWM
VIN
PGOOD
EN
ILIM
VOUT
VSEN
SS
AGND
FAN5234
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
FPWM
BOOT
HDRV
SW
ISNS
VCC
LDRV
PGND
QSOP-16 or TSSOP-16
θ
JA
= 112
°
C/W
相關PDF資料 |
PDF描述 |
|---|---|
| FAN5234QSCX | Mobile-Friendly PWM/PFM Controller |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN5234QSC_Q | 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 |
| FAN5234QSCX | 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 |
| 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: |
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