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LT3971IDD-5#PBF

更新时间： 2024-11-23 20:09:19
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
28页 614K
描述
LT3971 - 38V, 1.2A, 2MHz Step-Down Regulator with 2.8µA Quiescent Current; Package: DFN; Pins: 10; Temperature Range: -40°C to 85°C

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LT3971IDD-5#PBF 技术参数

是否Rohs认证：符合生命周期：Transferred
零件包装代码：DFN包装说明：HVSON, SOLCC10,.12,20
针数：10Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：7.45Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：38 V
最小输入电压：4.3 V标称输入电压：12 V
JESD-30 代码：S-PDSO-N10JESD-609代码：e3
长度：3 mm湿度敏感等级：1
功能数量：1端子数量：10
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：3 A标称输出电压：5 V
封装主体材料：PLASTIC/EPOXY封装代码：HVSON
封装等效代码：SOLCC10,.12,20封装形状：SQUARE
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：0.8 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：2400 kHz
技术：BIPOLAR温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3 mm
Base Number Matches：1

LT3971IDD-5#PBF 数据手册

 浏览型号LT3971IDD-5#PBF的Datasheet PDF文件第2页浏览型号LT3971IDD-5#PBF的Datasheet PDF文件第3页浏览型号LT3971IDD-5#PBF的Datasheet PDF文件第4页浏览型号LT3971IDD-5#PBF的Datasheet PDF文件第5页浏览型号LT3971IDD-5#PBF的Datasheet PDF文件第6页浏览型号LT3971IDD-5#PBF的Datasheet PDF文件第7页 
LT3971/LT3971-3.3/LT3971-5  
38V, 1.2A, 2MHz  
Step-Down Regulator with  
2.8µA Quiescent Current  
FEATURES  
DESCRIPTION  
The LT®3971 is an adjustable frequency monolithic buck  
switchingregulatorthatacceptsawideinputvoltagerange  
up to 38V. Low quiescent current design consumes only  
2.8µAofsupplycurrentwhileregulatingwithnoload. Low  
ripple Burst Mode operation maintains high efficiency at  
low output currents while keeping the output ripple below  
15mV in a typical application. An internally compensated  
current mode topology is used for fast transient response  
and good loop stability. A high efficiency 0.33Ω switch  
is included on the die along with a boost Schottky diode  
and the necessary oscillator, control and logic circuitry.  
An accurate 1V threshold enable pin can be used to shut  
down the LT3971, reducing the input supply current to  
700nA. A capacitor on the SS pin provides a controlled  
inrush current (soft-start). A power good flag signals  
n
Ultralow Quiescent Current:  
2.8µA I Regulating 12V to 3.3V  
Q
IN  
OUT  
n
n
Fixed Output Voltages: 3.3V, 5V,  
2.1µA I Regulating 12V to 3.3V  
Q
IN  
OUT  
Low Ripple Burst Mode® Operation:  
Output Ripple < 15mV  
P-P  
n
n
n
n
n
n
n
n
n
n
n
n
Wide Input Voltage Range: 4.3V to 38V  
1.2A Maximum Output Current  
Adjustable Switching Frequency: 200kHz to 2MHz  
Synchronizable Between 250kHz to 2MHz  
Fast Transient Response  
Accurate 1V Enable Pin Threshold  
Low Shutdown Current: I = 700nA  
Q
Power Good Flag  
Soft-Start Capability  
Internal Compensation  
when V  
reaches 91% of the programmed output volt-  
OUT  
Output Voltage: 1.19V to 30V  
Small Thermally Enhanced 10-Lead MSOP, 16-Lead  
MSOP and (3mm × 3mm) DFN Packages  
age. The LT3971 is available in small 10-lead MSOP and  
3mm × 3mm DFN packages with exposed pads for low  
thermal resistance. A 16-lead MSOP is also offered which  
has enhanced pin-to-pin fault tolerance.  
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.  
APPLICATIONS  
n
Automotive Battery Regulation  
n
Power for Portable Products  
n
Industrial Supplies  
TYPICAL APPLICATION  
No Load Supply Current  
3.3V Step Down Converter  
3.0  
OUTPUT IN REGULATION  
V
IN  
4.5V TO 38V  
V
IN  
EN  
BOOST  
SW  
2.5  
OFF ON  
4.7µF  
LT3971-5  
0.47µF  
4.7µH  
PG  
SS  
2.0  
LT3971-3.3  
LT3971-3.3  
RT  
BD  
V
3.3V  
1.2A  
OUT  
1.5  
1.0  
V
49.9k  
f = 800kHz  
OUT  
SYNC GND  
22µF  
3971 TA01  
5
10  
15  
20  
25  
30  
35  
INPUT VOLTAGE (V)  
3971 TA01b  
3971fd  
1
1234567...28

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