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参数资料
| 型号： | LTC3617EUDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG SYNC 6A BUCK 24-QFN |
| 标准包装： | 73 |
| 应用： | 转换器，DDR，DDR2，DDR3 |
| 输入电压： | 2.25 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 可调至 0.5V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN（3x5） |
| 包装： | 管件 |
LTC3617
±6A Monolithic Synchronous
Step-Down Regulator
for DDR Termination
± 6A Output Current
2.25V to 5.5V Input Voltage Range
±10mV Output Voltage Accuracy
Optimized for Low Output Voltages Down to 0.5V
High Efficiency
Integrated Buffer for VTTR = VDDQIN ? 0.5
Shutdown Current: <1μA
Adjustable Switching Frequency: Up to 4MHz
Optional Internal Compensation
Internal Soft-Start
Power Good Status Output
Input Overvoltage Protected
Thermally Enhanced 24-Pin 3mm × 5mm
DDR Termination
Supports DDR, DDR2 and DDR3 Standards
Tracking Supplies
FEATURES
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QFN Package
APPLICATIONS
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TYPICAL APPLICATION
DESCRIPTION
The LTC ? 3617 is a high efficiency monolithic synchronous
buck regulator utilizing a current mode, constant frequency
architecture. It operates from an input voltage range of
2.25V to 5.5V and provides a regulated output voltage
equal to 0.5 ? VDDQIN while sourcing and sinking up to
6A of load current. An internal amplifier provides a VTTR
output voltage equal to 0.5 ? VDDQIN with an output cur -
rent capability of ±10mA.
The operating frequency is externally programmable up to
4MHz, allowing the use of small surface mount inductors.
For switching-noise-sensitive applications, the LTC3617
can be synchronized to an external clock up to 4MHz.
Forced continuous mode operation in the LTC3617 reduces
noise and RF interference. Adjustable external compensa-
tion allows the transient response to be optimized over a
wide range of loads and output capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external catch diode, minimizing
external component count and board space. The LTC3617
is offered in a leadless 24-pin 3mm × 5mm thermally
enhanced QFN package.
L , LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents, including 6580258, 5481178, 6498466, 6611131.
Efficiency and Power Loss
vs Load Current
V IN
2.5V
SV IN
RUN
VDDQIN
RT
LTC3617
PGOOD
ITH
SYNC
PV IN
VTTR
SW
SGND
PGND
V FB
22μF
× 4
0.15μH
V REF
1.25V
0.1μF ±10mA
VTT
1.25V
47μF ±6A
× 2
100
90
80
70
60
50
40
30
20
10
1
0.1
3617 TA01a
10
0
0.1
1
10
0.01
LOAD CURRENT (A)
3617 TA01b
3617fa
1
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| LTC3617IUDD#PBF | 功能描述:IC REG SYNC 6A 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 |
| LTC3617IUDD#TRPBF | 功能描述:IC REG SYNC 6A 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 |
| LTC3618EFE#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 |
| LTC3618EFE#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 |
| 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 |
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