- 您现在的位置：买卖IC网 > PDF目录1831 > LTC3618EFE#PBF (Linear Technology)IC REG DUAL SYNC 3A BUCK 24TSSOP PDF资料下载
参数资料
| 型号： | LTC3618EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG DUAL SYNC 3A BUCK 24TSSOP |
| 标准包装： | 62 |
| 应用： | 转换器，DDR，DDR2，DDR3 |
| 输入电压： | 2.25 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 可调至 0.6V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP |
| 包装： | 管件 |
LTC3618
Dual 4MHz, ±3A
Synchronous Buck Converter
for DDR Termination
DDR Power Supply, Termination and Reference
High Efficiency: Up to 94%
Dual Outputs with ±3A Output Current Capability
2.25V to 5.5V Input Voltage Range
±1% Output Voltage Accuracy
V TT Output Voltage Down to 0.5V
Shutdown Current ≤1μA
VTTR = VDDQIN/2, V FB2 = VTTR
Adjustable Switching Frequency Up to 4MHz
Internal or External Compensation
Selectable 0°/90°/180° Phase Shift Between Channels
Internal or External Soft-Start for V DDQ , Internal
Power Good Status Outputs
Low Profile 4mm × 4mm QFN-24 and TSSOP-24
DDR Memory
Supports DDR, DDR2, and DDR3 Standards
Tracking Supplies
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
Soft-Start for V TT
n
n
Packages
APPLICATIONS
n
n
n
TYPICAL APPLICATION
DESCRIPTION
The LTC ? 3618 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 first step-down regulator offers a high
accuracy V DDQ supply. A buffered reference generates
VTTR at 50% of VDDQIN and drives loads up to ±10mA.
The second regulator generates the DDR termination volt-
age (V TT ) equal to VTTR. Both regulators are capable of
delivering ±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.
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.
V IN
3.3V
100μF
SV IN
PV IN1
PV IN2
Efficiency and Power Loss vs Load Current
100 10
V REF = DDQ
ITH1
FB1
PHASE
PGOOD2
V
2
392k
RUN1
PGOOD1
LTC3618
RT
MODE/SYNC
RUN2
ITH2
VTTR
SGND PGND
VDDQIN
TRACK/SS1 SW1
SW2
FB2
1μH
1μH
422k
210k
V DDQ
1.8V/3A
47μF
V TT
0.9V/±3A
47μF
90
80
70
60
50
40
30
20
10
0
0.01
V DDQ = 1.8V
V TT = 0.9V
0.1 1
LOAD CURRENT (A)
1
0.1
0.01
10
3618 TA01b
0.01μF
3618 TA01a
1
For more information www.linear.com/LTC3618
3618fc
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3619BIMSE#TRPBF | IC REG BUCK SYNC ADJ DL 10MSOP |
| LTC3620EDC-1#TRPBF | IC REG BUCK SYNC 1.1V 15MA 8DFN |
| LTC3631IMS8E-5#TRPBF | IC REG BUCK SYNC 5V 0.1A 8MSOP |
| LTC3632IMS8E#TRPBF | IC REG BUCK SYNC ADJ 20MA 8MSOP |
| LTC3633IFE#TRPBF | IC REG BUCK ADJ 3A DL 28TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3618EUF#PBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3618EUF#TRPBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3618IFE#PBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3618IFE#TRPBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3618IUF#PBF | 功能描述:IC REG DUAL SYNC 3A BUCK 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
发布紧急采购，3分钟左右您将得到回复。