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LT3571EUD#PBF PDF预览

LT3571EUD#PBF

更新时间: 2024-02-19 13:21:55
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
16页 215K
描述
LT3571 - 75V DC/DC Converter for APD Bias; Package: QFN; Pins: 16; Temperature Range: -40°C to 85°C

LT3571EUD#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, LCC16,.12SQ,20
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:2.92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:20 V最小输入电压:2.7 V
标称输入电压:3 VJESD-30 代码:S-PQCC-N16
JESD-609代码:e3长度:3 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:最大输出电流:0.57 A
封装主体材料:PLASTIC/EPOXY封装代码:HVQCCN
封装等效代码:LCC16,.12SQ,20封装形状:SQUARE
封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度(摄氏度):250
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:BOOST最大切换频率:2300 kHz
技术:BIPOLAR温度等级:OTHER
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:3 mm
Base Number Matches:1

LT3571EUD#PBF 数据手册

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LT3571  
75V DC/DC Converter  
for APD Bias  
FEATURES  
DESCRIPTION  
The LT®3571 is a current mode step-up DC/DC converter  
designed to bias avalanche photodiodes (APDs) in optical  
receivers with an output voltage up to 75V. The LT3571  
features a high side fixed voltage drop APD current moni-  
tor with better than 10% relative accuracy over the entire  
temperaturerange.Theintegratedpowerswitch,Schottky  
diode and APD current monitor allow a small solution  
footprint and low solution cost. It combines a traditional  
voltage loop and a unique current loop to operate as  
a constant-current source or constant-voltage source.  
The inductor-based topology ensures an input free from  
switching noise. The integrated high side current monitor  
produces a current proportional to the APD current with  
better than 10% relative accuracy over four decades of  
dynamic range in the input range of 250nA to 2.5mA. This  
current can be used as a reference to provide a digitally  
programmed output voltage via the CTRL pin. The LT3571  
is available in the tiny footprint (3mm × 3mm) 16-lead  
QFN package.  
n
High APD Voltage: Up to 70V  
n
Integrated Schottky Diode  
n
75V, 370mA Internal Switch  
n
High Side Fixed Voltage Drop APD Current Monitor  
n
Adjustable Frequency: 250kHz to 2MHz  
n
Frequency Synchronization  
n
Wide V Range: 2.7V to 20V  
IN  
n
Constant-Voltage and Constant-Current Regulation  
n
Programmable Current Limit Protection  
Surface Mount Components  
Low Shutdown Current <1μA  
n
n
n
Internal Soft-Start  
Internal Compensation  
n
n
CTRL Pin Allows Output Adjustment with  
No Polarity Inversion  
n
3mm × 3mm 16-Lead QFN Package  
APPLICATIONS  
n
APD Bias  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
n
PIN Diode Bias  
n
Optical Receivers and Modules  
Fiber Optic Network Equipment  
n
TYPICAL APPLICATION  
45V Low Noise APD Bias Power Supply  
APD Bias Ripple  
10μH  
V
IN  
5V  
V
SW  
IN  
V
OFF ON  
1μF  
OUT  
SHDN  
20Ω  
V
REF  
50V  
500μV/DIV  
CTRL  
LT3571  
MONIN  
10nF  
R
T
1M  
SYNC  
FB  
GND MON  
APD  
20.5k  
3571 TA01b  
I
= 1mA  
500ns/DIV  
APD  
12.1k  
1MHz  
49.9Ω  
45V  
0.1μF  
10k  
0.1μF  
10nF  
3571 TA01a  
3571fa  
1

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