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参数资料
| 型号： | LTC3413IFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 16TSSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.7 V ~ 5.5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 3A |
| 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： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TSSOP-EP |
LTC3413
FUNCTIONAL DIAGRAM
SGND
8
V FB
SV IN
1
SV IN
V REF
6
I TH
3
SLOPE
COMPENSATION
RECOVERY
PMOS CURRENT
COMPARATOR
+
PV IN
9
PV IN
16
4
0.9V REF
2
ERROR
AMPLIFIER
OSCILLATOR
SLOPE
COMPENSATION
–
10 SW
11 SW
LOGIC
–
14 SW
15 SW
PGOOD
1.1V REF
2
+
2
RUN
NMOS CURRENT
COMPARATOR
12 PGND
13 PGND
3413 BD
5
R T
OPERATION
Main Control Loop
The LTC3413 is a monolithic, constant frequency, current
mode step-down DC/DC converter that is capable of sourc-
ing and sinking current at the output. During normal opera-
tion, the internal top power switch (P-channel MOSFET) is
turned on at the beginning of each clock cycle. Current in
the inductor increases until the current comparator trips
and turns off the top power MOSFET. The peak inductor
current at which the current comparator shuts off the top
power switch is controlled by the voltage on the I TH pin.
The error ampli?er adjusts the voltage on the I TH pin by
comparing the feedback signal on the V FB pin with a ref-
erence voltage that is equal to one-half of the voltage on
the V REF pin. When the load current increases, it causes
a reduction in the feedback voltage relative to the refer-
ence. The error ampli?er raises the I TH voltage until the
average inductor current matches the new load current.
When the top power MOSFET shuts off, the synchronous
7
RUN/SS
power switch (N-channel MOSFET) turns on until either
the bottom current limit is reached or the beginning of the
next clock cycle. The bottom current limit is set at –7A.
The operating frequency is set by an external resistor
connected between the R T pin and ground. The switching
frequency can range from 300kHz to 2MHz.
Overvoltage and undervoltage comparators will pull the
PGOOD output low if the output voltage comes out of
regulation by ±10%. In an overvoltage condition, the top
power MOSFET is turned off and the bottom power MOSFET
is switched on until either the overvoltage condition clears
or the bottom MOSFET’s current limit is reached.
Dropout Operation
When the input supply voltage decreases toward the output
voltage, the duty cycle increases toward the maximum
on-time. Further reduction of the supply voltage forces the
3413fc
6
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| LTC3414EFE#PBF | 功能描述:IC REG BUCK SYNC ADJ 4A 20TSSOP 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 |
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| LTC3414EFE#TRMPBF | 制造商:Linear Technology 功能描述:LEAD FREE 4MHz, 4A Synch Step dwn Regulator |
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