- 您现在的位置：买卖IC网 > PDF目录14807 > LT3579EFE#PBF (Linear Technology)IC REG MULTI CONFIG SYNC 20TSSOP PDF资料下载
参数资料
| 型号： | LT3579EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 28/40页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG SYNC 20TSSOP |
| 标准包装： | 74 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出数： | 1 |
| 输入电压： | 2.5 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.5MHz |
| 电流 - 输出： | 6A |
| 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： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-TSSOP-EP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页当前第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
LT3579/LT3579-1
APPENDIX
Table 7 shows a list of several discrete PMOS manufa-
cturers. Consult the manufacturers for detailed information
on their entire selection of PMOS devices.
Table 7. Discrete PMOS Manufacturers
V OUT
500mV/DIV
AC COUPLED
I L
2A/DIV
Vishay
www.vishay.com
Fairchild Semiconductor
Central Semiconductor
www.fairchildsemi.com
www.centralsemi.com
I LOAD
1A/DIV
R C = 1k
100μs/DIV
35791 F17a
R C = 3.5k
100μs/DIV
R C = 8k
100μs/DIV
COMPENSATION–ADJUSTMENT
To compensate the feedback loop of the LT3579, a series
resistor-capacitor network in parallel with an optional single
capacitor must be connected from the V C pin to GND. For
most applications, choose a series capacitor in the range
of 1nF to 10nF with 2.2nF being a good starting value.
The optional parallel capacitor should range in value from
22pF to 180pF with 47pF being a good starting value. The
compensation resistor, R C , is usually in the range of 5k to
50k. A good technique to compensate a new application is
to use a 100kΩ potentiometer in place of the series resistor
R C . With the series and parallel capacitors at 2.2nF and
47pF respectively, adjust the potentiometer while observing
the transient response and the optimum value for R C can
be found. Figures 17a to 17c illustrate this process for the
circuit of Figure 20 with a load current stepped between
0.7A and 1.5A. Figure 17a shows the transient response
with R C equal to 1k. The phase margin is poor as evidenced
by the excessive ringing in the output voltage and inductor
current. In Figure 17b, the value of R C is increased to 3.5k,
which results in a more damped response. Figure 17c
shows the results when R C is increased further to 8k. The
transient response is nicely damped and the compensation
procedure is complete.
Figure 17a. Transient Response Shows Excessive Ringing
V OUT
500mV/DIV
AC COUPLED
I L
2A/DIV
I LOAD
1A/DIV
35791 F17b
Figure 17b. Transient Response Is Better
V OUT
500mV/DIV
AC COUPLED
I L
2A/DIV
I LOAD
1A/DIV
35791 F17c
Figure 17c. Transient Response Is Well Damped
COMPENSATION – THEORY
Like all other current mode switching regulators, the
LT3579 needs to be compensated for stable and efficient
operation. Two feedback loops are used in the LT3579: a
fast current loop which does not require compensation,
and a slower voltage loop which does. Standard Bode plot
analysis can be used to understand and adjust the voltage
feedback loop.
35791f
28
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3614EUDD#PBF | IC REG BUCK SYNC ADJ 4A 24QFN |
| RCM31DCAN-S189 | CONN EDGECARD 62POS R/A .156 SLD |
| LT1507CS8#PBF | IC REG BUCK ADJ 1.5A 8SOIC |
| LT1375CS8-5#PBF | IC REG BUCK 5V 1.5A 8SOIC |
| RCM31DCAH-S189 | CONN EDGECARD 62POS R/A .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3579EFE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A Boost/Inverting DC/DC Converter with Fault Protection |
| LT3579EUFD#PBF | 功能描述:IC REG MULTI CONFIG SYNC 20QFN 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 |
| LT3579EUFD#TRPBF | 功能描述:IC REG MULTI CONFIG SYNC 20QFN 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 |
| LT3579EUFD-1#PBF | 功能描述:IC REG MULTI CONFIG SYNC 20QFN 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 |
| LT3579EUFD-1#TRPBF | 功能描述:IC REG MULTI CONFIG SYNC 20QFN 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:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
发布紧急采购，3分钟左右您将得到回复。