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LT3690HUFE#PBF

更新时间： 2024-02-04 03:45:42
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
30页 1184K
描述
LT3690 - 36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator with 70µA Quiescent Current; Package: QFN; Pins: 26; Temperature Range: -40°C to 125°C

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LT3690HUFE#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC26/32,.16X.24,20
针数：26Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.13其他特性：OPERATES IN ADJUSTABLE MODE FROM 0.8 V TO 20 V
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：36 V
最小输入电压：3.9 V标称输入电压：12 V
JESD-30 代码：R-PQCC-N26JESD-609代码：e3
长度：6 mm湿度敏感等级：1
功能数量：1端子数量：26
最高工作温度：150 °C最低工作温度：-40 °C
最大输出电流：8 A封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC26/32,.16X.24,20
封装形状：RECTANGULAR封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：225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：1680 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：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

LT3690HUFE#PBF 数据手册

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LT3690  
36V, 4A, 1.5MHz Synchronous  
Step-Down Switching Regulator  
with 70µA Quiescent Current  
DescripTion  
FeaTures  
n
Wide Input Range:  
The LT®3690 is an adjustable frequency monolithic buck  
switching regulator that accepts input voltages up to 36V.  
A high efficiency 90mΩ switch is included on the device  
along with the boost diode and the necessary oscillator,  
control,andlogiccircuitry.Theinternalsynchronouspower  
switch of 30mΩ increases efficiency and eliminates the  
need for an external Schottky catch diode. Current mode  
topology is used for fast transient response and good  
loop stability. Shutdown reduces input supply current to  
less than 1µA. The low ripple Burst Mode maintains high  
efficiency at low output currents while keeping output  
ripple below 15mV in typical applications.  
– Operation from 3.9V to 36V  
– Overvoltage Lockout Protects Circuits  
Through 60V Transients  
n
4A Maximum Output Current  
n
Integrated 30mΩ N-Channel Synchronous Switch  
Low Ripple (<15mV ) Burst Mode® Operation:  
Q
Programmable Input Undervoltage Lockout  
0.8V Feedback Reference Voltage  
Output Voltage: 0.8V to 20V  
Programmable and Synchronizable Oscillator  
(170kHz to 1.5MHz)  
Soft-Startup and Output Voltage Tracking  
Short-Circuit Robust  
Power Good Flag  
n
P-P  
I = 70µA at 12V to 3.3V  
IN  
OUT  
n
n
n
n
The LT3690 features robust operation and is easily con-  
figurable.UsingaresistordividerontheUVLOpinprovides  
a programmable undervoltage lockout. A power good flag  
n
n
n
n
signals when V  
reaches 90% of the programmed out-  
OUT  
Small Thermally Enhanced 4mm × 6mm QFN Package  
put voltage. Protection circuitry senses the current in the  
powerswitchestoprotecttheLT3690againstshort-circuit  
conditions. Frequency foldback and thermal shutdown  
provide additional protection. The LT3690 is available in  
a 4mm × 6mm QFN package with exposed pads for low  
thermal resistance.  
applicaTions  
n
Automotive Systems  
n
Industrial Supplies  
n
Distributed Supply Regulation  
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.  
Typical applicaTion  
3.3V Step-Down Converter  
Efficiency and Power Loss  
V
IN  
100  
90  
80  
70  
60  
50  
2.5  
2.0  
1.5  
1.0  
0.5  
0
0.68µF  
4.5V TO 36V  
V
= 5V  
OUT  
V
EN  
BST  
SW  
BIAS  
PG  
10µF  
IN  
3.3µH  
3.3V  
4A  
V
= 3.3V  
OUT  
UVLO  
SS  
LT3690  
V
= 5V  
OUT  
V
V
C
316k  
102k  
V
= 3.3V  
OUT  
FB  
CCINT  
22k  
0.47µF  
SYNC  
RT  
V
= 12V  
IN  
100µF  
L = 4.7µH  
GND  
680pF  
ƒ = 600kHz  
32.4k  
ƒ = 600kHz  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
4
3690 TA01a  
LOAD CURRENT (A)  
3690 TA01b  
3690fb  
1
For more information www.linear.com/LT3690  
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