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| 型号： | LT3571EUD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.47A 16QFN |
| 产品培训模块： | APD Biasing |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 最高 75V |
| 输入电压： | 2.7 V ~ 20 V |
| PWM 型： | 电流/电压模式 |
| 频率 - 开关： | 250kHz ~ 2MHz |
| 电流 - 输出： | 470mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QFN-EP（3x3） |
LT3571
APPLICATIONS INFORMATION
APD Current Monitor Transient Response
Measurement
The transient response of the APD current monitor is a
key performance characteristic. It is essentially a func-
tion of the input step-signal levels, since the small signal
bandwidth increases with the input signal. At greater than
10μA, the LT3571 APD current mirror typically has several
hundred nanoseconds response time. To measure such
fast transient response, any capacitor at the APD and the
MON pin should be removed. Figure 4 shows a suggested
transient response test setup. Choose V L and V H , cor-
responding to the input step current levels, respectively.
At the MON pin, a wideband transimpedence ampli?er
is implemented using the LT1815. Operating in a shunt
APD Bias Voltage Temperature Compensation
Typically, the APD reverse bias voltage has a positive tem-
perature coef?cient. The APD pin voltage can be adjusted
with temperature via the CTRL pin. One simple solution is
to form a resistor divider from the V REF pin to the CTRL
pin, as shown in Figure 5. By carefully choosing the resis-
tor values, a temperature coef?cient can be applied to the
APD reverse bias voltage. A more complicated and precise
way to set the APD temperature coef?cient involves a
transistor network as shown in the “5V to 50V APD Bias
Power Supply with Temperature Compensation”. Please
consult with factory for this type applications.
con?guration, the ampli?er buffers the MON output current
and dramatically reduces the effective output impedence
at the OUT node. Note that there is an inversion and a DC
offset present when this measurement technique is used.
A regular oscilloscope probe can then be used to capture
V REF
LT3571
CTRL
3571 F05
R1
NTC
R2
the fast transient response at the OUT node.
Figure 5. Setting Temperature Compensation
MONIN
LT3571
MON
0.5pF
4.99k
APD
3571 F04
PMBT3904
2.5V
4.99k
0.1μF
–
+
LT1815
OUT
MEASURE
HERE
1k
PWM
–V HI
–V LO
Figure 4. Transient Response Measurement Set-Up
3571fa
11
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相关代理商/技术参数 |
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| LT3571IUD#PBF | 功能描述:IC REG BOOST ADJ 0.47A 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3571IUD#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER CURRENT MODE 制造商:Linear Technology 功能描述:DC-DC CONVERTER, CURRENT MODE, 2MHZ, QFN |
| LT3571IUD#TRPBF | 功能描述:IC REG BOOST ADJ 0.47A 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3572 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Full-Bridge Piezo Driver with 900mA Boost Converter |
| LT3572EUF#PBF | 功能描述:IC DRIVER PIEZO DUAL 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
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