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LTC3670EDDB-TRPBF PDF预览

LTC3670EDDB-TRPBF

更新时间: 2024-01-30 05:54:11
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
12页 214K
描述
Monolithic 400mA Buck Regulator with Dual 150mA LDOs in 3mm × 2mm DFN

LTC3670EDDB-TRPBF 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active包装说明:HVSON,
针数:12Reach Compliance Code:compliant
风险等级:5.21模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE最大输入电压:5.5 V
最小输入电压:2.5 V标称输入电压:3.6 V
JESD-30 代码:R-PDSO-N12JESD-609代码:e3
长度:3 mm湿度敏感等级:1
功能数量:1端子数量:12
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:1.1 A封装主体材料:PLASTIC/EPOXY
封装代码:HVSON封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:0.8 mm
表面贴装:YES切换器配置:BUCK
最大切换频率:2590 kHz温度等级:INDUSTRIAL
端子面层:MATTE TIN端子形式:NO LEAD
端子节距:0.45 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:2 mm
Base Number Matches:1

LTC3670EDDB-TRPBF 数据手册

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LTC3670  
Monolithic 400mA Buck  
Regulator with Dual 150mA  
LDOs in 3mm × 2mm DFN  
FEATURES  
DESCRIPTION  
The LTC®3670 is a triple power supply composed of a  
400mA synchronous buck regulator and two 150mA low  
dropout linear regulators (LDOs). The input supply range  
of 2.5V to 5.5V is especially well-suited for single-cell  
Lithium-Ion and Lithium-Ion/Polymer applications, and  
for powering low voltage ASICs and SoCs from 3V, 3.3V  
or 5V rails. Regulated output voltages are programmed  
via external resistors. Each output has its own enable pin  
for maximum flexibility.  
n
Triple Output Supply from a Single 2.5V to 5.5V Input  
n
400mA Buck DC/DC Plus Dual 150mA LDOs in One IC  
n
Outputs Regulate Down to 0.8V  
2.5ꢀ Reference Accuracy  
n
n
Constant-Frequency 2.25MHz Operation  
Burst Mode® Operation for High Efficiency at Light  
n
Loads; I = 70μA, All Outputs Enabled  
Q
n
Independent Enable Pin for Each Output  
n
Current Mode Operation for Excellent Line and Load  
Transient Response  
Internal Soft-Start for Each Output  
The 400mA buck regulator features constant-frequency  
2.25MHz operation, allowing small surface mount induc-  
tors and capacitors to be used. Burst Mode operation  
maintains high efficiency in light-load and no-load con-  
ditions. Internal control-loop compensation simplifies  
application design.  
n
n
Tiny 12-Lead 3mm × 2mm × 0.75mm DFN Package  
APPLICATIONS  
n
Handheld Products  
n
Portable Instruments  
The LTC3670 is available in a 0.75mm profile, 3mm ×  
2mm 12-lead DFN package.  
L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Patents pending.  
n
Single-Cell Li-Ion/Li-Polymer Powered Devices  
n
DMB/DVB-H Multimedia Cell Phones  
n
Multivoltage Power for Digital Logic, I/O, FPGAs,  
CPLDs, ASICs, SoCs, CPUs and RF Chipsets  
TYPICAL APPLICATION  
Triple Power Supply with Independent Enables  
Demoboard  
V
IN  
3.3V TO 5.5V  
2.2μF  
V
IN  
4.7μH  
V
OUT1  
1.2V  
400mA  
GND  
SW  
232k  
464k  
10pF  
4.7μF  
1μF  
BUCKFB  
9.3mm  
LTC3670  
V
OUT2  
2.8V  
ENBUCK  
ENLDO1  
ENLDO2  
PGOOD  
LDO1  
DIGITAL  
CONTROL  
150mA  
9.4mm  
ACTIVE AREA  
806k  
324k  
LDO1_FB  
V
OUT3  
3.3V  
LDO2  
3670 TA01b  
150mA  
1.02M  
1μF  
LDO2_FB  
324k  
3670 TA01a  
3670f  
1

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