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参数资料
| 型号： | LTM8023IY#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 2A 50LGA |
| 产品目录绘图： | LTM8022-8023 |
| 标准包装： | 168 |
| 系列： | µModule® |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 3.6V |
| 电压 - 输入（最大）： | 36V |
| Voltage - Output 1： | 0.8 ~ 10 V |
| 电流 - 输出（最大）： | 2A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 50-BGA |
| 尺寸/尺寸： | 0.44" L x 0.35" W x 0.13" H（11.3mm x 9.0mm x 3.4mm） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
LTM8023
APPLICATIONS INFORMATION
Ceramic capacitors are also piezoelectric. In Burst Mode
operation, the LTM8023’s switching frequency depends
on the load current, and can excite a ceramic capacitor
at audio frequencies, generating audible noise. Since the
LTM8023 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 performance
electrolytic capacitor at the output. The input capacitor can
be a parallel combination of a 2.2μF ceramic capacitor and
a low cost electrolytic capacitor.
A final precaution regarding ceramic capacitors concerns
the maximum input voltage rating of the LTM8023. A
ceramic input capacitor combined with trace or cable
inductance forms a high Q (under damped) tank circuit.
If the LTM8023 circuit is plugged into a live supply, the
input voltage can ring to twice its nominal value, possi-
bly exceeding the device’s rating. This situation is easily
avoided; see the Hot-Plugging Safely section.
Frequency Selection
The LTM8023 uses a constant frequency PWM architecture
that can be programmed to switch from 200kHz to 2.4MHz
by using a resistor tied from the R T pin to ground. Table 2
provides a list of R T resistor values and their resultant
frequencies.
Table 2. Switching Frequency vs R T Value
SWITCHING FREQUENCY (MHz) R T VALUE (kΩ)
0.2 187
0.3 124
0.4 88.7
0.5 69.8
0.6 56.2
0.7 46.4
0.8 39.2
0.9 34.6
1.0 29.4
1.2 23.7
1.4 19.6
1.6 15.8
1.8 13.3
2.0 11.5
2.2 9.76
2.4 8.66
Operating Frequency Tradeoffs
It is recommended that the user apply the optimal R T
value given in Table 1 for the input and output operating
condition. System level or other considerations, however,
may necessitate another operating frequency. While the
LTM8023 is flexible enough to accommodate a wide range
of operating frequencies, a haphazardly chosen one may
result in undesirable operation under certain operating or
fault conditions. A frequency that is too high can reduce
efficiency, generate excessive heat or even damage the
LTM8023 if the output is overloaded or short circuited. A
frequency that is too low can result in a final design that has
too much output ripple or too large of an output capacitor.
The maximum frequency (and attendant R T value) at which
the LTM8023 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.
BIAS Pin Considerations
The BIAS pin is used to provide drive power for the internal
power switching stage and operate internal circuitry. For
proper operation, it must be powered by at least 2.8V. If
the output voltage is programmed to be 2.8V or higher,
simply tie BIAS to V OUT . If V OUT is less than 2.8V, BIAS
can be tied to V IN or some other voltage source. In all
cases, ensure that the maximum voltage at the BIAS pin
is both less than 16V and the sum of V IN and BIAS is less
than 56V. If BIAS power is applied from a remote or noisy
voltage source, it may be necessary to apply a decoupling
capacitor locally to the LTM8023.
8023fi
For more information www.linear.com/LTM8023
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM8023MPV | 制造商:LINER 制造商全称:Linear Technology 功能描述:2A, 36V DC/DC μModule |
| LTM8023MPV#PBF | 功能描述:IC BUCK SYNC ADJ 2A 50LGA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:µModule® 设计资源:VI-200, VI-J00 Design Guide, Appl Manual 标准包装:1 系列:* 类型:隔离 输出数:1 电压 - 输入（最小）:100V 电压 - 输入（最大）:200V Voltage - Output 1:7.5V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:100W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:9-SlimMod 尺寸/尺寸:4.60" L x 1.80" W x 0.52" H（116.8mm x 45.7mm x 13.2mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
| LTM8023MPV#PBF | 制造商:Linear Technology 功能描述:DC/DC MICRO MODULE IC 制造商:Linear Technology 功能描述:IC, STEP-DOWN DC/DC POWER SUPPLY, LGA-50 |
| LTM8023MPV-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2A, 36V DC/DC μModule |
| LTM8023MPY#PBF | 功能描述:IC DC/DC UMODULE 2A 50BGA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:µModule® 设计资源:VI-200, VI-J00 Design Guide, Appl Manual 标准包装:1 系列:* 类型:隔离 输出数:1 电压 - 输入（最小）:66V 电压 - 输入（最大）:160V Voltage - Output 1:12V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:50W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
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