- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377776 > LTC3738CUHF (LINEAR TECHNOLOGY CORP) 3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning PDF資料下載
參數(shù)資料
| 型號： | LTC3738CUHF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning |
| 中文描述： | 5 A SWITCHING CONTROLLER, 630 kHz SWITCHING FREQ-MAX, PQCC38 |
| 封裝： | 7 X 5 MM, PLASTIC, M0-220WHKD, QFN-38 |
| 文件頁數(shù)： | 13/32頁 |
| 文件大?。?/td> | 316K |
| 代理商： | LTC3738CUHF |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當(dāng)前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
13
LTC3738
3738f
Start-Up
The start-up of the LTC3738 is controlled by the voltage
ramp on the SS pin. The start-up is not completed until the
short-circuit arming latch is enabled. During start-up, the
foldback current limit is temporarily defeated and at the
same time no reverse inductor current is allowed. This is
helpful for situations where output voltage has been “pre-
biased” at some voltage before the controller is enabled.
This will prevent sinking current during start-up which
would otherwise pull current from the pre-biased output.
VID Table and NO_CPU Detection
The LTC3738 has a VID block which is compatible with
VRM9 and VRM10. Tying VID5 to V
CC
will select the VRM9
table. When the voltage at VID5 is less than V
CC
– 1.5V, the
VRM10 table is selected and this pin serves as the VID5 bit
of VRM10. There is a built in –25mV output offset for the
VRM10 VID table and a –12.5mV output offset for the
VRM9 VID table.
The LTC3738 detects the presence of CPU by monitoring
the VID bits. If a VID0-VID4 all “1” condition is detected,
the controller acknowledges a NO_CPU fault. If this fault
condition persists for more than 1
μ
s, the SS pin is pulled
low and the controller is shut down. The LTC3738 will
attempt a normal start-up when the NO_CPU fault is
removed.
Thermal Detection
An accurate comparator and a thermal detector are inte-
grated into the LTC3738 for external or internal thermal
detection. Tying TSNS to V
CC
will enable an internal
thermal detector which generates a thermal event at or
above 120
°
C with 10
°
C hysteresis. When the voltage at
TSNS is less than V
CC
– 1.6V, the internal thermal detector
is disabled and this pin serves as the input to an accurate
comparator which is referenced to V
CC
/3 with a hysteresis
of V
CC
/24. A thermal event is generated when the voltage
at TSNS is less than V
CC
/3. VR_HOTB, an open-collector
output pin, will be pulled low when a thermal event occurs.
Active Voltage Positioning
Load slope is programmable in the LTC3738 through
external resistors. The inductor current information for all
three channels is sensed and combined; the final result is
presented as a voltage drop between AVP and IN
+
. This
voltage drop is scaled through two external resistors
attached to IN
+
and then added to the output voltage as the
compensation for load slope. The final load slope is
defined by the inductor current sense resistors and the
two external resistors mentioned above.
OPERATIOU
(Refer to Functional Diagram)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3770 | Synchronous Controller with Margining, Tracking and PLL |
| LTC3770EG | Synchronous Controller with Margining, Tracking and PLL |
| LTC3770EUH | Synchronous Controller with Margining, Tracking and PLL |
| LTC3776 | 16-Bit Buffer/Driver With 3-State Outputs 48-TVSOP -40 to 85 |
| LTC3776EUF | Dual 2-Phase, No RSENSE Synchronous Controller for DDR/QDR Memory Termination |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3738CUHF#PBF | 功能描述:IC CTRLR SW REG 3PH STPDWN 38QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC3738CUHF#TR | 功能描述:IC CTRLR SW REG 3PH STPDWN 38QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC3738CUHF#TRPBF | 功能描述:IC CTRLR SW REG 3PH STPDWN 38QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC-3743KG | 制造商:Lite-On Semiconductor Corporation 功能描述: |
| LTC3765EMSE#PBF | 功能描述:IC CTLR GATE DRIVER 16-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:Direct Flux Limit™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。