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参数资料
| 型号： | LTC3615EFE-1#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PDSO24 |
| 封装： | 4.40 MM, LEAD FREE, PLASTIC, TSSOP-24 |
| 文件页数： | 13/32页 |
| 文件大小： | 585K |
| 代理商： | LTC3615EFE-1#TRPBF |
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LTC3615/LTC3615-1
20
3615fa
50μs/DIV
3615 F05
VOUT
200mV/DIV
IL
1A/DIV
100mA
3A
VOUT = 1.8V
ILOAD = 100mA TO 3A
VMODE = 1.5V
COMPENSATION AND OUTPUT CAPACITOR
VALUES OF FIGURE 3
VOUT
100mV/DIV
IL
1A/DIV
50μs/DIV
3615 F06
VOUT = 1.8V
ILOAD = 100mA TO 3A
VMODE = 1.5V
VIN = VITH = 3.3V
OUTPUT CAPACITOR VALUE FIGURE 3
Figure 6. Load Step Transient in FCM in AVP Mode
Figure 5. Load Step Transient in FCM with External Compensation
Applications section uses faster compensation to improve
load step response.
A second, more severe transient is caused by switching
in loads with large (>1μF) supply bypass capacitors. The
discharged bypass capacitors are effectively put in parallel
with COUT, causing a rapid drop in VOUT. No regulator can
alter its delivery of current quickly enough to prevent this
sudden step change in output voltage if the load switch
resistance is low and it is driven quickly. More output
capacitance may be required depending on the duty cycle
and load step requirements.
If the ITH pin is tied to SVIN, the active voltage positioning
(AVP) mode and the internal compensation is selected.
In AVP mode, the load regulation performance is inten-
tionally reduced, setting the output voltage at a point that
is dependent on the load current. When the load current
suddenly increases, the output voltage starts from a level
slightly higher than nominal so the output voltage can
droop more and stay within the specied voltage range.
When the load current suddenly decreases, the output
voltage starts at a level lower than nominal so the output
voltage can have more overshoot and stay within the
specied voltage range. This behavior is demonstrated
in Figure 6.
The benet is a lower peak-to-peak output voltage devia-
tion for a given load step without having to increase the
output lter capacitance. Alternatively, the output voltage
lter capacitance can be reduced while maintaining the
same peak-to-peak transient response. For this operation
mode, the loop gain is reduced and no external compensa-
tion is required.
Programmable Switch Pin Slew Rate
As switching frequencies rise, it is desirable to minimize the
transition time required when switching to minimize power
losses and blanking time for the switch to settle. However,
fast slewing of the switch node results in relatively high
external radiated EMI and high on-chip supply transients,
which can cause problems for some applications.
APPLICATIONS INFORMATION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3615EUF#PBF | 功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC3615EUF#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3615EUF-1#PBF | 功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC3615EUF-1#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3615EUFPBF | 制造商:Linear Technology 功能描述:Dual 4MHz 3A Synch Step-Down DC/DC QFN24 |
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