参数资料
型号: LTC3616IUDD#TRPBF
厂商: Linear Technology
文件页数: 21/28页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 6A 24QFN
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: 0.6 V ~ 5.5 V
输入电压: 2.25 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 300kHz ~ 4MHz
电流 - 输出: 6A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 24-QFN
包装: 带卷 (TR)
供应商设备封装: 24-QFN(3x5)
LTC3616
APPLICATIONS INFORMATION
to the actual TRACK/SS pin voltage if the voltage value
is between 0.3V and 0.6V. Note: if TRACK/SS voltage is
0.6V, either the tracking circuit or the internal reference
can be used.
During up/down tracking the output current foldback is
disabled and the PGOOD pin is always pulled down (see
Figure 9).
Efficiency Considerations
The efficiency of a switching regulator is equal to the output
power divided by the input power times 100%. It is often
useful to analyze individual losses to determine what is
limiting the efficiency and which change would produce
the most improvement. Efficiency can be expressed as:
Efficiency = 100% – (L1 + L2 + L3 + ...)
0V
PIN VOLTAGE 0.2V
where L1, L2, etc. are the individual losses as a percent-
age of input power.
V FB PIN 0.6V
VOLTAGE
0.6V
TRACK/SS
0V
RUN PIN
VOLTAGE
V IN
0V
SV IN PIN
VOLTAGE
V IN
0V
TIME
SHUTDOWN SOFT-START
STATE STATE
t SS > 1ms
RUN STATE
REDUCED
SWITCHING
FREQUENCY
DOWN
UP
TRACKING
TRACKING
STATE
STATE
RUN STATE
3616 F08
Figure 8. DDR Pin Not Tied to S VIN
0.45V
0V
PIN VOLTAGE 0.2V
V FB PIN 0.3V
VOLTAGE
0.45V
TRACK/SS 0.3V
0V
EXTERNAL
VOLTAGE
REFERENCE 0.45V
RUN PIN
VOLTAGE
V IN
0V
SV IN PIN
VOLTAGE
V IN
0V
TIME
SHUTDOWN SOFT-START
STATE STATE
t SS > 1ms
RUN STATE
REDUCED
SWITCHING
FREQUENCY
DOWN
UP
TRACKING
TRACKING
STATE
STATE
RUN STATE
3616 F09
21
Figure 9. DDR Pin Tied to SV IN . Example DDR Application
For more information www.linear.com/LTC3616
3616fb
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