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LT3980

更新时间： 2024-01-07 19:49:46
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
24页 283K
描述
42V, 2.5A Synchronous Step-Down Regulator

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中文翻译

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LT3980 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：MSOP包装说明：HTSSOP, TSSOP16,.19,20
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.12其他特性：DUMMY VAL
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：58 V
最小输入电压：3 V标称输入电压：10 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e3
长度：4.039 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：4.9 A封装主体材料：PLASTIC/EPOXY
封装代码：HTSSOP封装等效代码：TSSOP16,.19,20
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.1 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：2550 kHz技术：BIPOLAR
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING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：30
宽度：3 mmBase Number Matches：1

LT3980 数据手册

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Electrical Specifications Subject to Change  
LT8611  
42V, 2.5A Synchronous  
Step-Down Regulator with  
Current Sense and 2.5µA  
Quiescent Current  
FEATURES  
DESCRIPTION  
The LT®8611 is a compact, high efficiency, high speed  
synchronous monolithic step-down switching regulator  
that consumes only 2.5μA of quiescent current. Top and  
bottom power switches are included with all necessary  
circuitry to minimize the need for external components.  
The built-in current sense amplifier with monitor and  
control pins allows accurate input or output current  
regulation and limiting. Low ripple Burst Mode operation  
enables high efficiency down to very low output currents  
n
Rail-to-Rail Current Sense Amplifier with Monitor  
n
Wide Input Voltage Range: 3.4V to 42V  
Ultralow Quiescent Current Burst Mode® Operation:  
n
2.5μA I Regulating 12V to 3.3V  
Q
IN  
P-P  
OUT  
Output Ripple < 10mV  
n
High Efficiency Synchronous Operation:  
96% Efficiency at 1A, 5V  
94% Efficiency at 1A, 3.3V  
from 12V  
from 12V  
IN  
OUT  
IN  
OUT  
n
n
n
n
n
n
n
n
n
n
Fast Minimum Switch-On Time: 50ns  
Low Dropout Under All Conditions: 200mV at 1A  
Allows Use Of Small Inductors  
Low EMI  
while keeping the output ripple below 10mV . A SYNC  
P-P  
pin allows synchronization to an external clock. Internal  
compensation with peak current mode topology allows  
the use of small inductors and results in fast transient  
response and good loop stability. The EN/UV pin has an  
Adjustable and Synchronizable: 200kHz to 2.2MHz  
Current Mode Operation  
Accurate 1V Enable Pin Threshold  
Internal Compensation  
accurate 1V threshold and can be used to program V  
IN  
undervoltage lockout or to shut down the LT8611 reduc-  
ing the input supply current to 1μA. A capacitor on the  
TR/SS pin programs the output voltage ramp rate during  
Output Soft-Start and Tracking  
Small Thermally Enhanced 3mm × 5mm 24-Lead  
QFN Package  
start-up. The PG flag signals when V  
is within ±±9 of  
OUT  
theprogrammedoutputvoltageaswellasfaultconditions.  
The LT8611 is available in a small 24-lead 3mm × 5mm  
QFNpackagewithexposedpadforlowthermalresistance.  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners.  
APPLICATIONS  
n
Automotive and Industrial Supplies  
General Purpose Step-Down  
n
n
CCCV Power Supplies  
TYPICAL APPLICATION  
5V Step-Down Converter with 2.5A Output Current Limit  
12VIN to 5VOUT Efficiency  
100  
±5  
±0  
85  
80  
75  
70  
65  
V
IN  
5.5V TO 42V  
V
BST  
IN  
0.1μF  
4.7μH  
4.7μF  
ON OFF  
EN/UV  
SYNC  
IMON  
ICTRL  
V
0.02Ω  
1μF  
OUT  
SW  
5V  
LT8611  
2.5A  
ISP  
ISN  
BIAS  
PG  
10pF  
INTV  
CC  
f
= 700kHz  
TR/SS  
RT  
60  
55  
50  
SW  
1M  
243k  
0.1μF  
52.3k  
V
IN  
V
IN  
= 12V  
= 24V  
FB  
PGND  
GND  
1μF  
= 800kHz  
47μF  
0
0.5  
1
1.5  
2
2.5  
8611 TA01a  
8611 TA01b  
LOAD CURRENT (A)  
f
SW  
8611p  
1
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中文翻译

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