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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： | 6/32页 |
| 文件大小： | 585K |
| 代理商： | LTC3615EFE-1#TRPBF |
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LTC3615/LTC3615-1
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Low Supply Operation
The LTC3615 is designed to operate down to an input supply
voltage of 2.25V. An important consideration at low input
supply voltages is that the RDS(ON) of the P-channel and
N-channel power switches increases by 50% compared to
5V. The user should calculate the power dissipation when
the LTC3615 is used at 100% duty cycle with low input
voltages to ensure that thermal limits are not exceeded.
Slope Compensation and Inductor Peak Current
Slope compensation provides stability in current mode
constant-frequency architectures by preventing subhar-
monic oscillations at duty cycles greater than 50%. The
LTC3615 implements slope compensation by adding a
compensation ramp to the inductor current signal.
Short-Circuit Protection
The peak inductor current at which the current comparator
shuts off the top power switch is controlled by the voltage
on the ITH pin.
If the output current increases, the error amplier raises
the ITH pin voltage until the average inductor current
matches the new load current. In normal operation,
the LTC3615 clamps the maximum ITH pin voltage at
approximately 1.05V which corresponds to about 5A peak
inductor current.
When the output is shorted to ground, the inductor current
decays very slowly during a single switching cycle. The
LTC3615 uses two techniques to prevent current runaway
from occurring:
1. If the output voltage drops below 50% of its nominal
value, the clamp voltage at pin ITH is lowered, causing
the maximum peak inductor current to lower gradu-
ally with the output voltage. When the output voltage
reaches 0V, the clamp voltage at the ITH pin drops to
40% of the clamp voltage during normal operation. The
short-circuit peak inductor current is determined by the
minimum on-time of the LTC3615, the input voltage
and the inductor value. This foldback behavior helps
in limiting the peak inductor current when the output
is shorted to ground. It is disabled during internal or
external soft-start and tracking up/down operation (see
the Applications Information section).
2. If the inductor current of the bottom MOSFET increases
beyond 6A typical, the top power MOSFET will be held
off and switching cycles will be skipped until the induc-
tor current reduces.
OPERATION
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| LTC3615IUF-1#PBF | SWITCHING REGULATOR, PQCC24 |
| LTC3615EUF#PBF | SWITCHING REGULATOR, PQCC24 |
| LTC3615EFE#PBF | SWITCHING REGULATOR, PDSO24 |
| LTC3615IFE-1#PBF | SWITCHING REGULATOR, PDSO24 |
| LTC3615EUF#TRPBF | SWITCHING REGULATOR, PQCC24 |
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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