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参数资料
| 型号： | DC1669A |
| 厂商： | Linear Technology |
| 文件页数： | 10/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTM4627 |
| 软件下载： | LTM4627 Spice Model |
| 设计资源： | LTM4627 Gerber Files DC1669A Design Files |
| 标准包装： | 1 |
| 系列： | LTM®, uModule® |
| 主要目的： | DC/DC，步升 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1V，1.2V，1.5V，1.8V，2.5V，3.3V |
| 电流 - 输出： | 15A |
| 输入电压： | 4.5 ~ 20 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM4627 |
| 相关产品： | LTM4627IV#PBF-ND - IC UMODULE DC/DC 15A 133LGA LTM4627EV#PBF-ND - IC UMODULE DC/DC 15A 133LGA |
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LTM4627
OPERATION
Power Module Description
The LTM4627 is a high performance single output stand-
alone nonisolated switching mode DC/DC power supply.
It can provide a 15A output with few external input and
output capacitors. This module provides precisely regulated
output voltages programmable via external resistors from
0.6V DC to 5V DC over a 4.5V to 20V input range. The typical
application schematic is shown in Figure 18.
The LTM4627 has an integrated constant-frequency cur-
rent mode regulator, power MOSFETs, 0.47μH inductor,
and other supporting discrete components. The switch-
ing frequency range is from 400kHz to 770kHz, and the
typical operating frequency is 500kHz. For switching
noise-sensitive applications, it can be externally syn-
chronized from 250kHz to 800kHz, subject to minimum
on-time limitations. A single resistor is used to program
the frequency. See the Applications Information section.
With current mode control and internal feedback loop
compensation, the LTM4627 module has sufficient stabil-
ity margins and good transient performance with a wide
range of output capacitors, even with all ceramic output
capacitors.
Current mode control provides cycle-by-cycle fast current
limit in an overcurrent condition. An internal overvoltage
monitor protects the output voltage in the event of an
overvoltage >10%. The top MOSFET is turned off and the
bottom MOSFET is turned on until the output is cleared.
Pulling the RUN pin below 1.1V forces the regulator into a
shutdown state. The TRACK/SS pin is used for program-
ming the output voltage ramp and voltage tracking during
start-up. See the Application Information section.
The LTM4627 is internally compensated to be stable over
all operating conditions. Table 4 provides a guideline for
input and output capacitances for several operating condi-
tions. LTpowerCAD? is available for transient and stability
analysis. The V FB pin is used to program the output voltage
with a single external resistor to ground.
A remote sense amplifier is provided for accurately sensing
output voltages ≤3.3V at the load point.
Multiphase operation can be easily employed with the
synchronization inputs using an external clock source.
See application examples.
High efficiency at light loads can be accomplished with
selectable Burst Mode operation using the MODE_PLLIN
pin. These light load features will accommodate battery
operation. Efficiency graphs are provided for light load op-
eration in the Typical Performance Characteristics section.
4627fc
10
For more information www.linear.com/LTM4627
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1669B | 制造商:Linear Technology 功能描述:LTM4627EV Demo Board 20V, 15A DC/DC 制造商:Linear Technology 功能描述:LTM4627EV Demo Board 20V, 15A DC/DC Module Regulator |
| DC16-73 | 制造商:Skyworks Solutions Inc 功能描述:DIRECTIONAL COUPLER 15DB P/N: N011 |
| DC16-73LF | 功能描述:信号调节 .3-2.7GHz Coupling 15.6dB and 14.8dB RoHS:否 制造商:EPCOS 产品:Duplexers 频率:782 MHz, 751 MHz 频率范围: 电压额定值: 带宽: 阻抗:50 Ohms 端接类型:SMD/SMT 封装 / 箱体:2.5 mm x 2 mm 工作温度范围:- 30 C to + 85 C 封装:Reel |
| DC16-73LF-B | 制造商:Skyworks Solutions Inc 功能描述:RF DIRECTIONAL COUPLER |
| DC1676A | 制造商:Linear Technology 功能描述:BOARD DEMO LTC4359 制造商:Linear Technology 功能描述:DEMO BOARD, LTC4359, IDEAL DIODE CONTROLLER; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC4359; Kit Application Type:Power Management; Application Sub Type:Ideal Diode; Kit Contents:Demo Board LTC4359 |
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