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参数资料
| 型号： | LTM4603IV-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/26页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 6A 118-LGA |
| 产品培训模块： | Power Module vs. Discrete DC to DC |
| 软件下载： | LTM4603-1 Spice Model |
| 产品目录绘图： | LTM Series_15x15x2.8 |
| 设计资源： | LTM4603IV-1#PBF Footprint.bxl |
| 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）： | 20V |
| 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： | 118-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： | -40°C ~ 85°C |
| 效率： | 93% |
| 产品目录页面： | 2711 (CN2011-ZH PDF) |
LTM4603/LTM4603-1
APPLICATIONS INFORMATION
R PGM =
V OUT 1.18V
ThetypicalLTM4603applicationcircuitisshowninFig-
ure 18. External component selection is primarily deter-
mined by the maximum load current and output voltage.
Refer to Table 2 for specific external capacitor requirements
for a particular application.
V IN to V OUT Step-Down Ratios
There are restrictions in the maximum V IN and V OUT step
down ratio that can be achieved for a given input voltage.
These constraints are shown in the Typical Performance
Characteristics curves labeled V IN to V OUT Step-Down
Ratio. Note that additional thermal derating may apply. See
the Thermal Considerations and Output Current Derating
section of this data sheet.
where %V OUT is the percentage of V OUT you want to
margin, and V OUT(MARGIN) is the margin quantity in volts:
? ? 10k
0.6V V OUT(MARGIN)
where R PGM is the resistor value to place on the MPGM
pin to ground.
The margining voltage, V OUT(MARGIN) , will be added or
subtracted from the nominal output voltage as determined
by the state of the MARG0 and MARG1 pins. See the truth
table below:
MARG1 MARG0 MODE
LOW LOW NO MARGIN
Output Voltage Programming and Margining
LOW
HIGH
HIGH
LOW
MARGIN UP
MARGIN DOWN
V OUT = 0.6
R SET
(k W )
V OUT
(V)
V OUT(MARGIN) =
%V OUT
? V OUT
V OUT
V IN
I CIN(RMS) =
I OUT(MAX)
η %
ThePWMcontrollerhasaninternal0.6Vreferencevoltage.
As shown in the Block Diagram, a 1M and a 60.4k 0.5%
internal feedback resistor connects V OUT and V FB pins
together. The V OUT_LCL pin is connected between the 1M
and the 60.4k resistor. The 1M resistor is used to protect
against an output overvoltage condition if the V OUT_LCL
pin is not connected to the output, or if the remote sense
amplifier output is not connected to V OUT_LCL . In these
cases, the output voltage will default to 0.6V. Adding a
resistor R SET from the V FB pin to SGND pin programs
the output voltage:
60.4k + R SET
R SET
Table 1 . R SET Standard 1% Resistor Values vs V OUT
Open 60.4 40.2 30.1 25.5 19.1 13.3 8.25
0.6 1.2 1.5 1.8 2 2.5 3.3 5
The MPGM pin programs a current that when multiplied
by an internal 10k resistor sets up the 0.6V reference ±
offset for margining. A 1.18V reference divided by the
R PGM resistor on the MPGM pin programs the current.
Calculate V OUT(MARGIN) :
100
HIGH HIGH NO MARGIN
Input Capacitors
LTM4603 module should be connected to a low AC imped-
ance DC source. Input capacitors are required to be placed
adjacent to the module. In Figure 18, the 10μF ceramic input
capacitors are selected for their ability to handle the large
RMS current into the converter. An input bulk capacitor
of 100μF is optional. This 100μF capacitor is only needed
if the input source impedance is compromised by long
inductive leads or traces.
For a buck converter, the switching duty-cycle can be
estimated as:
D =
Without considering the inductor ripple current, the RMS
current of the input capacitor can be estimated as:
? D ? (1 ? D)
In the above equation, η % is the estimated efficiency of
the power module. C IN can be a switcher-rated electrolytic
aluminum capacitor, OS-CON capacitor or high value ce-
ramic capacitor. Note the capacitor ripple current ratings
are often based on temperature and hours of life. This
makes it advisable to properly derate the input capacitor,
4603fb
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4603IV-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4603V | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4603V-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4604 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Voltage, 4A DC/DC μModuleTM with Tracking |
| LTM4604A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Voltage, 4A DC/DC μModule with Tracking |
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