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參數(shù)資料
| 型號： | LTC3618EFE#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 8 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | 4.40 MM, LEAD FREE, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 603K |
| 代理商： | LTC3618EFE#TRPBF |
LTC3618
1
3618f
TYPICAL APPLICATION
DESCRIPTION
Dual 4MHz, ±3A
Synchronous Buck Converter
for DDR Termination
The LTC3618 is a dual synchronous step-down regulator
using a current mode, constant-frequency architecture. It
provides a complete DDR solution with an input voltage
range from 2.25V to 5.5V.
The output of the rst step-down regulator offers a high
accuracy VDDQsupply.AbufferedreferencegeneratesVTTR
at 50% of VDDQIN and drives loads up to ±10mA. The
second regulator generates the DDR termination voltage
(VTT) equal to VTTR. Both regulators are capable of deliv-
ering ±3A of load current at 1MHz switching frequency.
The operating frequency is externally programmable up to
4MHz, allowing the use of small surface mount inductors.
0°, 90°, or 180° of phase shift between the two channels
can be selected to minimize input current ripple. For
switching noise-sensitive applications, the LTC3618 can
be synchronized to an external clock up to 4MHz.
The LTC3618 is offered in leadless 24-pin 4mm × 4mm
QFN and thermally enhanced 24-pin TSSOP packages.
Efciency and Power Loss vs Load Current
FEATURES
APPLICATIONS
n High Efciency: Up to 94%
n Dual Outputs with ±3A Output Current Capability
n 2.25V to 5.5V Input Voltage Range
n ±1% Output Voltage Accuracy
n VTT Output Voltage Down to 0.5V
n Shutdown Current ≤1μA
n VTTR = VDDQIN/2, VFB2 = VTTR
n Adjustable Switching Frequency Up to 4MHz
n Internal or External Compensation
n Selectable 0°/90°/180° Phase Shift Between Channels
n Internal or External Soft-Start for VDDQ, Internal
Soft-Start for VTT
n Power Good Status Outputs
n Low Prole 4mm × 4mm QFN-24 and TSSOP-24
Packages
n DDR Memory Termination
n Supports DDR, DDR2, and DDR3 Standards
n Tracking Supplies
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5481178, 6498466, 6580258, 6611131.
LOAD CURRENT (A)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
10
1
0.1
0.01
100
20
10
80
50
70
60
40
10
3618 TA01b
0
0.1
1
0.01
VDDQ = 1.8V
VTT = 0.9V
SW1
VDDQIN
FB1
LTC3618
3618 TA01a
SGND
PGND
RUN1
TRACK/SS1
ITH1
PHASE
RUN2
PGOOD2
ITH2
PGOOD1
VTTR
RT
MODE/SYNC
VIN
3.3V
SVIN
PVIN1
PVIN2
100μF
0.01μF
SW2
FB2
1μH
47μF
VTT
0.9V/±3A
1μH
47μF
VDDQ
1.8V/3A
422k
210k
392k
VREF =
VDDQ
2
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| LTC3618EUF#PBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用: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 供應商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC3618EUF#TRPBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用: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 供應商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC3618IFE#PBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用: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 供應商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LTC3618IFE#TRPBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用: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 供應商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
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