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LM25088MH-1 PDF预览

LM25088MH-1

更新时间: 2024-11-15 05:42:03
品牌 Logo 应用领域
美国国家半导体 - NSC 控制器
页数 文件大小 规格书
26页 518K
描述
Wide Input Range Non-Synchronous Buck Controller

LM25088MH-1 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:TSSOP-16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.18模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:42 V最小输入电压:4.5 V
标称输入电压:24 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:5 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封装主体材料:PLASTIC/EPOXY
封装代码:HSSOP封装等效代码:TSSOP16,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, HEAT SINK/SLUG, SHRINK PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:SINGLE最大切换频率:1000 kHz
温度等级:AUTOMOTIVE端子面层:Tin/Lead (Sn85Pb15)
端子形式:GULL WING端子节距:0.65 mm
端子位置:DUAL处于峰值回流温度下的最长时间:40
宽度:4.4 mmBase Number Matches:1

LM25088MH-1 数据手册

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June 5, 2009  
LM25088  
Wide Input Range Non-Synchronous Buck Controller  
General Description  
Features  
The LM25088 high voltage non-synchronous buck controller  
features all the necessary functions to implement an efficient  
high voltage buck converter using a minimum number of ex-  
ternal components. The LM25088 can be configured to op-  
erate over an ultra-wide input voltage range of 4.5V to 42V.  
This easy to use controller includes a level shifted gate driver  
capable of controlling an external N-channel buck switch. The  
control method is based upon peak current mode control uti-  
lizing an emulated current ramp. The use of an emulated  
control ramp reduces noise sensitivity of the pulse-width mod-  
ulation circuit, allowing reliable control of very small duty  
cycles necessary in high input voltage/low output voltage ap-  
plications. The LM25088 switching frequency is pro-  
grammable from 50 kHz to 1 MHz.  
Emulated current mode control  
Drives external high-side N-channel MOSFET  
Ultra-wide input voltage range from 4.5V to 42V  
Low IQ Shutdown and Standby modes  
High duty cycle ratio feature for reduced dropout voltage  
Spread spectrum EMI reduction (LM25088-1)  
Hiccup timer for overload protection (LM25088-2)  
Adjustable output voltage from 1.205V with 1.5% feedback  
reference accuracy  
Wide bandwidth error amplifier  
Single resistor oscillator frequency setting  
Oscillator synchronization capability  
The LM25088 is available in two versions: The LM25088-1  
provides a +/-5% frequency dithering function to reduce the  
conducted and radiated EMI, while the LM25088-2 provides  
a versatile restart timer for overload protection. Additional  
features include a low dropout bias regulator, tri-level enable  
input to control shutdown and standby modes, soft-start and  
oscillator synchronization capability. The device is available  
in a thermally enhanced TSSOP-16EP pin package.  
Programmable soft-start  
High voltage, low dropout bias regulator  
Thermal shutdown protection  
Package  
TSSOP-16EP  
Simplified Application Schematic  
30087601  
© 2009 National Semiconductor Corporation  
300876  
www.national.com  

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