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参数资料
| 型号： | DC1623A |
| 厂商： | Linear Technology |
| 文件页数： | 11/26页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTM8003 |
| 软件下载： | LTM8033 Spice Model |
| 设计资源： | DC1623A Design Files |
| 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： | 3.3V |
| 电流 - 输出： | 3A |
| 输入电压： | 5.5 ~ 36 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 425kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM8033 |
LTM8033
APPLICATIONS INFORMATION
For most applications, the design process is straight for-
ward, summarized as follows:
? Look at Table 1 and find the row that has the desired
input range and output voltage.
? Apply the recommended C IN , C FIN , C OUT , R ADJ and R T
values.
? Connect BIAS as indicated.
As the integrated input EMI filter may ring in response to
an application of a step input voltage, a bulk capacitance
may be applied between FIN and GND. See the Hot-Plug-
ging Safely section for details.
While these component combinations have been tested
for proper operation, it is incumbent upon the user to
verify proper operation over the intended system’s line,
load and environmental conditions. Bear in mind that the
maximum output current is limited by junction tempera-
ture, the relationship between the input and output voltage
magnitude and polarity and other factors. Please refer to
the graphs in the Typical Performance Characteristics
section for guidance.
The maximum frequency (and attendant R T value) at
which the LTM8033 should be allowed to switch is given
in Table 1 in the f MAX column, while the recommended
frequency (and R T value) for optimal efficiency over the
given input condition is given in the f OPTIMAL column.
There are additional conditions that must be satisfied if
the synchronization function is used. Please refer to the
Synchronization section for details.
Note: An input bulk capacitance is required at either V IN
or FIN. Refer to the Typical Performance Characteristics
section for load conditions.
Capacitor Selection Considerations
The C IN , C FIN and C OUT capacitor values in Table 1 are the
minimum recommended values for the associated oper-
ating conditions. Applying capacitor values below those
indicated in Table 1 is not recommended, and may result
in undesirable operation. Using larger values is generally
acceptable, and can yield improved dynamic response, if
it is necessary. Again, it is incumbent upon the user to
verify proper operation over the intended system’s line,
load and environmental conditions.
Ceramic capacitors are small, robust and have very low
ESR. However, not all ceramic capacitors are suitable.
X5R and X7R types are stable over temperature and ap-
plied voltage and give dependable service. Other types,
including Y5V and Z5U have very large temperature and
voltage coefficients of capacitance. In an application cir-
cuit they may have only a small fraction of their nominal
capacitance resulting in much higher output voltage ripple
than expected.
Ceramic capacitors are also piezoelectric. In Burst Mode
operation, the LTM8033’s switching frequency depends
on the load current, and can excite a ceramic capacitor
at audio frequencies, generating audible noise. Since the
LTM8033 operates at a lower current limit during Burst
Mode operation, the noise is typically very quiet to a
casual ear.
If this audible noise is unacceptable, use a high perfor-
mance electrolytic capacitor at the output. It may also be
a parallel combination of a ceramic capacitor and a low
cost electrolytic capacitor.
A final precaution regarding ceramic capacitors concerns
the maximum input voltage rating of the LTM8033. A
ceramic input capacitor combined with trace or cable
inductance forms a high Q (under damped) tank circuit.
If the LTM8033 circuit is plugged into a live supply, the
input voltage can ring to twice its nominal value, possibly
exceeding the device’s rating. This situation can be easily
avoided; see the Hot-Plugging Safely section.
8033fa
For more information www.linear.com/LTM8033
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1625A-A | 功能描述:BOARD DEMO FOR LTC4227-1 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1625A-B | 功能描述:BOARD DEMO FOR LTC4227-2 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1627 | 制造商:INTRONICS 制造商全称:INTRONICS 功能描述:15 Watt Triple Output DC-DC Converters |
| DC1627A-A | 制造商:Linear Technology 功能描述:EVAL BOARD FOR LTC4226-1 制造商:Linear Technology 功能描述:DEMO BOARD, LTC4226 HOT SWAP CONTROLLER, Silicon Manufacturer:Linear Technology, Silicon Core Number:LTC4226CUD-1, Kit Application Type:Power Management, Application Sub Type:Hot Swap Controller, Kit Contents:Demo Board LTC4226CUD-1 , RoHS Compliant: NA |
| DC1627A-B | 制造商:Linear Technology 功能描述:EVAL BOARD FOR LTC4226-2 制造商:Linear Technology 功能描述:DEMO BOARD, LTC4226 HOT SWAP CONTROLLER, Silicon Manufacturer:Linear Technology, Silicon Core Number:LTC4226CUD-2, Kit Application Type:Power Management, Application Sub Type:Hot Swap Controller, Kit Contents:Demo Board LTC4226CUD-2 , RoHS Compliant: NA |
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