参数资料
型号: LTC3407EDD#TRPBF
厂商: Linear Technology
文件页数: 6/16页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 1A DL 10DFN
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.6 V ~ 5 V
输入电压: 2.5 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 1.5MHz
电流 - 输出: 1A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 10-DFN(3x3)
LTC3407
BLOCK DIAGRAM
REGULATOR 1
MODE/SYNC
6
BURST
CLAMP
V IN
SLOPE
COMP
V FB1
1
0.6V
+
EA
I TH
0.35V
+
EN
BURST
SLEEP
I COMP
+
5 Ω
S
R
RS
LATCH
Q
Q
0.55V
+
UVDET
UV
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
ANTI
SHOOT-
THRU
4 SW1
0.65V
+
OVDET
OV
SHUTDOWN
PGOOD1
I RCMP
V IN
11 GND
3 V IN
RUN1
RUN2
2
9
0.6V REF
OSC
OSC
POR
COUNTER
8 POR
5 GND
PGOOD2
REGULATOR 2 (IDENTICAL TO REGULATOR 1)
V FB2
10
7 SW2
3407 BD
OPERATION
The LTC3407 uses a constant frequency, current mode
architecture. The operating frequency is set at 1.5MHz
and can be synchronized to an external oscillator. Both
channels share the same clock and run in-phase. To suit
a variety of applications, the selectable Mode pin allows
the user to trade-off noise for ef?ciency.
The output voltage is set by an external divider returned
to the V FB pins. An error ampli?er compares the divided
output voltage with a reference voltage of 0.6V and adjusts
the peak inductor current accordingly. Overvoltage and
undervoltage comparators will pull the POR output low if
the output voltage is not within ±8.5%. The POR output
will go high after 262,144 clock cycles (about 175ms) of
achieving regulation.
6
Main Control Loop
During normal operation, the top power switch (P-channel
MOSFET) is turned on at the beginning of a clock cycle
when the V FB voltage is below the the reference voltage.
The current into the inductor and the load increases until
the current limit is reached. The switch turns off and
energy stored in the inductor ?ows through the bottom
switch (N-channel MOSFET) into the load until the next
clock cycle.
The peak inductor current is controlled by the internally
compensated I TH voltage, which is the output of the er-
ror ampli?er. This ampli?er compares the V FB pin to the
0.6V reference. When the load current increases, the
V FB voltage decreases slightly below the reference. This
3407fa
相关PDF资料
PDF描述
LTC3408EDD#TRPBF IC REG BUCK W/BYPASS TXRX 8-DFN
LTC3409IDD#TRPBF IC REG BUCK SYNC ADJ 0.6A 8DFN
LTC3410BESC6-1.8#TRPBF IC REG BUCK SYNC 1.8V .3A SC70-6
LTC3411AIMS#TRPBF IC REG BUCK SYNC ADJ 10MSOP
LTC3411IMS#TRPBF IC REG BUCK SYNC ADJ 10MSOP
相关代理商/技术参数
参数描述
LTC3407EMSE 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP RoHS:否 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
LTC3407EMSE#PBF 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP 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
LTC3407EMSE#TR 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP RoHS:否 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
LTC3407EMSE#TRPBF 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP 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
LTC3407EMSE-2 制造商:Linear Technology 功能描述:Conv DC-DC Dual Step Down 2.5V to 5.5V 10-Pin MSOP EP