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参数资料
| 型号： | DC823B-A |
| 厂商： | Linear Technology |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTM4600 |
| 设计资源： | DC823B-A Design Files DC823B-A Schematic |
| 标准包装： | 1 |
| 系列： | µModule® |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 0.6V，1.2V，1.5V，1.8V，2.5V，3.3V，和 5V |
| 电流 - 输出： | 10A |
| 输入电压： | 4.5 ~ 20V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1.35MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM4600 |
| 相关产品： | LTM4600IV#PBF-ND - IC DC/DC UMODULE 10A 104-LGA LTM4600EV#PBF-ND - IC DC/DC UMODULE 10A 104-LGA |
LTM4600
APPLICATIONS INFORMATION
t DELAY =
? (C SS_EXT + 1000pF)
the module input pins in the PCB layout to minimize the
trace inductance and high frequency AC noise.
Output Capacitors
The LTM4600 is designed for low output voltage ripple. The
bulk output capacitors C OUT is chosen with low enough
effective series resistance (ESR) to meet the output voltage
ripple and transient requirements. C OUT can be low ESR
tantalum capacitor, low ESR polymer capacitor or ceramic
capacitor (X5R or X7R). The typical capacitance is 200μF
if all ceramic output capacitors are used. The internally
optimized loop compensation provides suf?cient stability
margin for all ceramic capacitors applications. Additional
output ?ltering may be required by the system designer,
if further reduction of output ripple or dynamic transient
spike is required. Refer to Table 2 for an output capaci-
tance matrix for each output voltage Droop, peak to peak
deviation and recovery time during a 5A/μs transient with
a speci?c output capacitance.
Fault Conditions: Current Limit and Over current
Foldback
The LTM4600 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 over load condi-
tion, the LTM4600 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 Latchoff with the RUN/SS pin
The RUN/SS pin provides a means to shut down the
LTM4600 as well as a timer for soft-start and over-cur-
rent latchoff. Pulling the RUN/SS pin below 0.8V puts
the LTM4600 into a low quiescent current shutdown (I Q
≤ 75μA). Releasing the pin allows an internal 1.2μA cur-
rent source to charge up the timing capacitor C SS . Inside
LTM4600, there is an internal 1000pF capacitor from RUN/
SS pin to ground. If RUN/SS pin has an external capacitor
C SS_EXT to ground, the delay before starting is about:
1.5V
1.2 μ A
When the voltage on RUN/SS pin reaches 1.5V, the LTM4600
internal switches are operating with a clamping of the
maximum output inductor current limited by the RUN/SS
pin total soft-start capacitance. As the RUN/SS pin voltage
rises to 3V, the soft-start clamping of the inductor current
is released.
V IN to V OUT Step-Down Ratios
There are restrictions in the maximum V IN to V OUT step
down ratio that can be achieved for a given input voltage.
These contraints 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
sections of this data sheet.
After the controller has been started and given adequate
4600fc
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DC823B-B | 功能描述:BOARD EVAL LTM4600HV RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:µModule® 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| DC826A-B | 制造商:Linear Technology 功能描述:EVAL BOARD, LTC2951-2 PUSH BUTTON ON/OFF CTRL, Silicon Manufacturer:Linear Techn |
| DC826B-A | 功能描述:BOARD EVAL LTC2950 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| DC826B-A | 制造商:Linear Technology 功能描述:EVAL BOARD, LTC2950-2 PUSH BUTTON ON/OFF |
| DC826B-B | 功能描述:BOARD EVAL LTC2950 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
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