参数资料
型号: LTC3404EMS8#TRPBF
厂商: Linear Technology
文件页数: 6/16页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 0.6A 8MSOP
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: 0.8 V ~ 6 V
输入电压: 2.65 V ~ 6 V
PWM 型: 电流模式,混合
频率 - 开关: 1.4MHz
电流 - 输出: 600mA
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: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
供应商设备封装: 8-MSOP
LTC3404
TYPICAL PERFOR A CE CHARACTERISTICS
V OUT
100mV/DIV
I L
500mA/DIV
I TH
1V/DIV
Load Step Response
40 μ s/DIV
V OUT
100mV/DIV
I L
500mA/DIV
I TH
1V/DIV
Load Step Response
40 μ s/DIV
V OUT
100mV/DIV
I L
500mA/DIV
I TH
1V/DIV
Load Step Response
40 μ s/DIV
V IN = 3.6V C IN = 10 μ F
V OUT = 1.5V C OUT = 22 μ F
L = 4.7 μ H I LOAD = 200mA TO 500mA
3404 G17
V IN = 3.6V C IN = 10 μ F
V OUT = 1.5V C OUT = 22 μ F
L = 4.7 μ H I LOAD = 50mA TO 500mA
3404 G18
V IN = 3.6V C IN = 10 μ F
V OUT = 1.5V C OUT = 22 μ F
L = 4.7 μ H I LOAD = 50mA TO 500mA
3404 G19
PULSE SKIPPING MODE
PI FU CTIO S
PULSE SKIPPING MODE
Burst Mode OPERATION
RUN (Pin 1): Run Control Input. Forcing this pin below
0.4V shuts down the LTC3404. In shutdown all functions
are disabled drawing < 1 μ A supply current. Forcing this
pin above 1.2V enables the LTC3404. Do not leave RUN
floating.
I TH (Pin 2): Error Amplifier Compensation Point. The
current comparator threshold increases with this control
voltage. Nominal voltage range for this pin is from 0.5V
to 1.9V.
V FB (Pin 3): Feedback Pin. Receives the feedback voltage
from an external resistive divider across the output.
GND (Pin 4): Ground Pin.
SW (Pin 5): Switch Node Connection to Inductor. This pin
connects to the drains of the internal main and synchro-
nous power MOSFET switches.
V IN (Pin 6): Main Supply Pin. Must be closely decoupled
to GND, Pin 4.
SYNC/MODE (Pin 7): External Clock Synchronization and
Mode Select Input. To synchronize with an external clock,
apply a clock with a frequency between 1MHz and 1.7MHz.
To select Burst Mode operation, tie to V IN . Grounding this
pin selects pulse skipping mode. Do not leave this pin
floating.
PLL LPF (Pin 8): Output of the Phase Detector and Control
Input of Oscillator. Connect a series RC lowpass network
from this pin to ground if externally synchronized. If
unused, this pin may be left open.
3404fb
6
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