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参数资料
| 型号： | LTC3416EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 20TSSOP |
| 标准包装： | 74 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 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： | 4A |
| 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： | 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 |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3416
FU CTIO AL DIAGRA
EXPOSED
SV IN
SGND
PAD
I TH
PV IN
16
5
21
18
7
14
PMOS CURRENT
TRACK
3
+
VOLTAGE
REFERENCE
SLOPE
COMPENSATION
RECOVERY
COMPARATOR
+
–
V FB
–
ERROR
AMPLIFIER
SLOPE
COMPENSATION
19
0.74V
+
–
+
OSCILLATOR
LOGIC
–
8
9
12
13
SW
RUN/SS
0.86V
–
+
NMOS CURRENT
4
PGOOD
17
RUN
COMPARATOR
1
10
PGND
11
2
R T
OPERATIO
Main Control Loop
The LTC3416 is a monolithic, constant frequency, current
mode step-down DC/DC converter. 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 amplifier adjusts the voltage on the I TH pin by
comparing the feedback signal from a resistor divider on
the V FB pin with an internal 0.8V reference. When the load
current increases, it causes a reduction in the feedback
voltage relative to the reference. The error amplifier raises
20
3416 FD
the I TH voltage until the average inductor current matches
the new load current. When the top power MOSFET shuts
off, the synchronous 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 –5A.
The operating frequency is externally set by an external
resistor connected between the R T pin and ground. The
practical switching frequency can range from 300kHz to
4MHz.
Overvoltage and undervoltage comparators will pull the
PGOOD output low if the output voltage comes out of
regulation by ± 7.5%. In an overvoltage condition, the top
3416fa
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3417 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 1.4A/800mA 4MHz Step-Down DC/DC Regulator |
| LTC3417A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator |
| LTC3417A-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator with POR |
| LTC3417A-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator |
| LTC3417AEDHC | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator |
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