參數(shù)資料
型號(hào)： FAN5069EMTCX
廠商： Fairchild Semiconductor
文件頁(yè)數(shù)： 10/22頁(yè)
文件大小： 622K
描述： IC REG DL BCK/LINEAR 16TSSOP
產(chǎn)品變化通告： Metallization Mask Rev 18/Apr/2007
標(biāo)準(zhǔn)包裝： 2,500
拓?fù)洌?/td> 降壓（降壓）同步（1），線性（LDO）（1）
功能： 任何功能
輸出數(shù)： 2
頻率 - 開(kāi)關(guān)： 200kHz
電壓/電流 - 輸出 1： 控制器
電壓/電流 - 輸出 2： 控制器
帶 LED 驅(qū)動(dòng)器： 無(wú)
帶監(jiān)控器： 無(wú)
帶序列發(fā)生器： 無(wú)
電源電壓： 4.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： *
封裝/外殼： 16-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： *
包裝： 帶卷 (TR)
?2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5069 Rev. 1.1.5
10
Block Diagram
Figure 20. Block Diagram
Detailed Operation Description
FAN5069 combines a high-efficiency, fixed-frequency
PWM controller designed for single-phase synchronous
buck Point-Of-Load converters with an integrated LDO
controller to support GTL-type loads. This controller is
ideally suited to deliver low-voltage, high-current power
supplies   needed   in   desktop   computers,   notebooks,
workstations, and servers. The controller comes with an
integrated boot diode which helps reduce component
cost and increase space savings. With this controller, the
input to the power supply can be varied from 3V to 24V
and the output voltage can be set to regulate at 0.8V to
15V on the switcher output. The LDO output can be con-
figured to regulate between 0.8V to 3V and the input to
the LDO can be from 1.5V to 5V, respectively. An internal
shunt regulator at the VCC pin facilitates the controller
operation from either a 5V or 12V power source.
V
CC
 Bias Supply
FAN5069 can be configured to operate from 5V or 12V
for V
CC
. When 5V supply is used for V
CC
, no resistor is
required to be connected between the supply and the
V
CC
. When the 12V supply is used, a resistor R
VCC
 is
connected between the 12V supply and the V
CC,
  as
shown in Figure 1. The internal shunt regulator at the
VCC pin is capable of sinking 150mA of current to
ensure that the controllers internal V
CC
 is maintained at
5.6V maximum.
Choose a resistor such that:
?SPAN class="pst FAN5069EMTCX_2464147_4">  It is rated to handle the power dissipation.
?SPAN class="pst FAN5069EMTCX_2464147_4">  Current sunk within the controller is minimized to 
prevent IC temperature rise.
R
VCC
 Selection (IC)
The selection of R
VCC
 is dependent on:
?SPAN class="pst FAN5069EMTCX_2464147_4">  Variation of the 12V supply
?SPAN class="pst FAN5069EMTCX_2464147_4">  Gate charge of the top and bottom FETs (Q
FET
)
?SPAN class="pst FAN5069EMTCX_2464147_4">  Switching frequency (F
SW
)
?SPAN class="pst FAN5069EMTCX_2464147_4">  Shunt regulator minimum current (1mA)
?SPAN class="pst FAN5069EMTCX_2464147_4">  Quiescent current of the IC (I
Q
)
Calculate R
VCC
 based on the minimum input voltage for
the V
CC
:
 (EQ. 1)
For a typical example, where: Vin
MIN
 = 11.5V, I
Q
 = 3mA,
Q
FET
= 30nC, F
SW
= 300KHz, R
VCC
 is calculated to be
398.65?
PWM Section
The FAN5069s PWM controller combines the conven-
tional voltage mode control and current sensing through
lower MOSFET R
DS_ON
to generate the PWM signals.
This method of current sensing is loss-less and cost
effective. For more accurate current sense requirements,
an optional external resistor can be connected with the
bottom MOSFET in series.
Current
Sense
Amplifier
FB
COMP
SS
Vref
Vcc
ILIM
R
ILIM
10糀
10糀
Current Limit
Comparator
Internal
Boot Diode
Internal Vcc 5.6V Max.
OSC
R
S
Q
PWM
EN
R(RAMP)
Ramp
Generator
Enable
Vcc
C
O
L
O
BOOT
Vout
R
RAMP
Error
Amplifier
PWM
Comparator
C
BOOT
V
IN
V
IN
Shunt Reg
HDRV
SW
LDRV
PGND
 
Summing
?/DIV>
Amplifier
Adaptive
Gate Drive
Circuit
R
VCC
Vin
MIN
5.6

I
Q
1   10
"
3

Q
FET
F
SW
1.2
"
"
+
+
(
)
----------- ----------------- ----------------- ----------------- ----------------- ---------- -
=
相關(guān)PDF資料
PDF描述
HIP1011BCB-T IC CTRLR HOT PLUG PCI 16-SOIC
HIP1020CK-T IC CTRLR HOT PLUG SOT23-5
HIP6018BCBZ-T IC REG TRPL BCK/LINEAR 24-SOIC
HIP6021CB-T IC REG QD BCK/LINEAR 28-SOIC
HIP6521CB-T IC REG QD BCK/LINEAR SYNC 16SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FAN5069MTCX 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 PWM and ULDO Controller Combo 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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
FAN5070 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:High Performance Programmable Synchronous DC-DC Controller
FAN5070M 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:Voltage-Mode SMPS Controller
FAN5071 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms
FAN5071AB WAF 制造商:Fairchild Semiconductor Corporation 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*