參數(shù)資料
型號(hào)： LTC3733
廠商： Linear Technology Corporation
英文描述： 3-Phase, Buck Controllers for AMD CPUs
中文描述： 3相，降壓控制器的AMD處理器
文件頁(yè)數(shù)： 1/32頁(yè)
文件大?。?/td> 333K
代理商： LTC3733
1
LTC3733/LTC3733-1
3-Phase, Buck
Controllers for AMD CPUs
3733f
APPLICATIU
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
The LTC
3733 family are PolyPhase
synchronous step-
down switching regulator controllers that drive all
N-channel external power MOSFET stages in a phase-
lockable, fixed frequency architecture. The 3-phase con-
troller drives its output stages with 120
°
phase separation
at frequencies of up to 530kHz per phase to minimize the
RMS current dissipated by the ESR of both the input and
output filter capacitors. The 3-phase technique effectively
triples the fundamental frequency, improving transient
response while operating each phase at an optimal fre-
quency for efficiency and ease of thermal design. Light
load efficiency is optimized by using a choice of output
stage shedding or Burst Mode technology.
A differential amplifier provides true remote sensing of both
the high and low sides of the output voltage at load points.
Soft-start and a defeatable, timed short-circuit shutdown
protect the MOSFETs and the load. A foldback current
circuit also provides protection for the external MOSFETs
under short-circuit or overload conditions. An all-“1” VID
detector turns off the regulator after 1
μ
s timeout.
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode, OPTI-LOOP and PolyPhase are registered trademarks of Linear Technology
Corporation. AMD Opteron is a trademark of Advanced Micro Devices, Inc.
I
3-Phase Controller with Onboard MOSFET Drivers
I
Current Mode Control Ensures Current Sharing
I
Differential Amplifier Accurately Senses V
OUT
I
±
5% Output Current Matching Optimizes Thermal
Performance and Size of Inductors and MOSFETs
I
Reduced Input and Output Capacitance
I
Supports Active Voltage Positioning
I
VID Programmable Output Voltage from 0.8V to 1.55V
(AMD Opteron
TM
CPU)
I
6-Phase, 90A to 120A Operation
I
Output Power Good Indicator with Adaptive Blanking
I
210kHz to 530kHz Per Phase, PLL, Fixed Frequency
I
Synchronizable (LTC3733-1)
I
PWM, Stage Shedding or Burst Mode
Operation
I
OPTI-LOOP
Compensation Minimizes C
OUT
I
Adjustable Soft-Start Current Ramping
I
Short-Circuit Shutdown Timer with Defeat Option
I
No_CPU Detection
I
36-Lead 0.209" SSOP and 38-Lead (5mm
×
7mm) QFN
I
High Performance Notebook Computers
I
Servers, Desktop Computers and Workstations
Figure 1. High Current Triple Phase Step-Down Converter
0.002
L1 0.8
μ
H
22
μ
F
35V
×
2
0.002
L2 0.8
μ
H
V
IN
D1
D2
D3
0.002
C
OUT
470
μ
F
4V
×
4
V
0.8V TO 1.55V
65A
V
5V TO 28V
L3 0.8
μ
H
V
IN
3733 F01
TG1
V
CC
0.1
μ
F
SW3 SW2 SW1
SW1
BG1
SENSE1
+
SENSE1
–
BOOST1
BOOST2
BOOST3
TG2
SW2
BG2
PGND
PGOOD
PLLIN
RUN
PLLFLTR
I
TH
SS
0.1
μ
F
100pF
680pF
5 VID BITS
5k
ON/OFF
POWER GOOD INDICATOR
OPTIONAL SYN IN
SGND
EAIN
VID0-VID4
SENSE2
+
SENSE2
–
TG3
SW3
BG3
SENSE3
+
SENSE3
–
IN
–
IN
+
+
10
μ
F
5V
+
LTC3733-1
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參數(shù)描述
LTC3733CG 功能描述:IC CTRLR BUCK AMD 3PHASE 36-SSOP 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(pán) 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC3733CG#PBF 功能描述:IC CTRLR BUCK AMD 3PHASE 36-SSOP 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(pán) 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC3733CG#TR 功能描述:IC CTRLR BUCK 3PH AMD CPU 36SSOP 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(pán) 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC3733CG#TRPBF 功能描述:IC CTRLR BUCK AMD 3PHASE 36-SSOP 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(pán) 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC3733CUHF-1 功能描述:IC CTRLR BUCK 3PH AMD CPU 38-QFN 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(pán) 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
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