参数资料
型号: LTM4606MPV#PBF
厂商: Linear Technology
文件页数: 13/28页
文件大小: 0K
描述: IC DC/DC UMODULE 6A 133-LGA
产品培训模块: Wide Temperature DC/DC Converter µModules
Power Module vs. Discrete DC to DC
µModule® Family of EN55022 Class B Certified Regulators
产品目录绘图: LTM Series_15x15x2.8
特色产品: μModule Products
标准包装: 119
系列: µModule®
类型: 非隔离(POL)
输出数: 1
电压 - 输入(最小): 4.5V
电压 - 输入(最大): 28V
Voltage - Output 1: 0.6 ~ 5 V
电流 - 输出(最大): 6A
安装类型: 表面贴装
封装/外壳: 133-LGA
尺寸/尺寸: 0.59" L x 0.59" W x 0.11" H(15.0mm x 15.0mm x 2.8mm)
包装: 托盘
工作温度: -55°C ~ 125°C
效率: 98%
产品目录页面: 2711 (CN2011-ZH PDF)
LTM4606
APPLICATIONS INFORMATION
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
1-PHASE
2-PHASE
3-PHASE
4-PHASE
6-PHASE
0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9
DUTY CYCLE (V O /V IN )
4612 F05
Figure 3. Normalized Output Ripple Current vs Duty Cycle, Dlr = V O T/L I
(
)
t SOFTSTART ? 0.8 ? 0.6V ± V OUT(MARGIN) ?
Fault Conditions: Current Limit and Overcurrent
Foldback
LTM4606 has a current mode controller, which inher-
ently limits the cycle-by-cycle inductor current not only
in steady-state operation, but also in transient.
To further limit current in the event of an overload condi-
tion, the LTM4606 provides foldback current limiting. If the
output voltage falls by more than 50%, then the maximum
output current is progressively lowered to about one sixth
of its full current limit value.
Soft-Start and Tracking
The TRACK/SS pin provides a means to either soft-start
the regulator or track it to a different power supply.
A capacitor on this pin will program the ramp rate of the
output voltage. A 1.5μA current source will charge up the
external soft-start capacitor to 80% of the 0.6V internal
voltage reference plus or minus any margin delta. This will
control the ramp of the internal reference and the output
voltage. The total soft-start time can be calculated as:
C SS
1.5μA
When the RUN pin falls below 1.5V, then the TRACK/SS
pin is reset to allow for proper soft-start control when the
regulator is enabled again. Current foldback and forced
continuous mode are disabled during the soft-start pro-
cess. The soft-start function can also be used to control
the output ramp up time, so that another regulator can
be easily tracked to it.
4606fd
For more information www.linear.com/LTM4606
13
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