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| 型号： | LTM8032EY#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/26页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 2A 71BGA |
| 标准包装： | 170 |
| 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： | 71-BGA |
| 尺寸/尺寸： | 0.59" L x 0.35" W x 0.13" H（15.0mm x 9.0mm x 3.4mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 125°C |
LTM8032
OPERATION
The LTM8032 is a standalone nonisolated step-down
switching DC/DC power supply. It can deliver up to 2A of
DC output current with only bulk external input and output
capacitors. This module provides a precisely regulated
output voltage programmable via one external resistor
from 0.8VDC to 10VDC. The input voltage range is 3.6V
to 36V. Given that the LTM8032 is a step-down converter,
make sure that the input voltage is high enough to support
the desired output voltage and load current. A simplified
Block Diagram is given on the previous page.
The LTM8032 is designed with an input EMI filter and other
features to make its radiated emissions compliant with
several EMC specifications including EN55022 class B.
Compliance with conducted emissions requirements may
be obtained by adding a standard input filter.
The LTM8032 contains a current mode controller, power
switching element, power inductor, power Schottky diode
and a modest amount of input and output capacitance.
The LTM8032 is a fixed frequency PWM regulator. The
switching frequency is set by simply connecting the ap-
propriate resistor value from the RT pin to GND.
APPLICATIONS INFORMATION
For most applications, the design process is straight
forward, summarized as follows:
1. Look at Table 1 and find the row that has the desired
input range and output voltage.
2. Apply the recommended C IN , C OUT , R ADJ and R T
values.
3. 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,
series resistance or some clamping mechanism may be
required. See the Hot-Plugging 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.
An internal regulator provides power to the control circuitry.
The bias regulator can draw power from the V IN pin, but if
the BIAS pin is connected to an external voltage higher than
2.8V, bias power will be drawn from the external source
(typically the regulated output voltage). This improves
efficiency. The RUN/SS pin is used to place the LTM8032
in shutdown, disconnecting the output and reducing the
input current to less than 1μA.
To further optimize efficiency, the LTM8032 automatically
switches to Burst Mode operation in light load situations.
Between bursts, all circuitry associated with controlling
the output switch is shut down reducing the input supply
current to 50μA in a typical application. The oscillator
reduces the LTM8032’s operating frequency when the
voltage at the ADJ pin is low. This frequency foldback helps
to control the output current during start-up and overload.
The LTM8032 contains a power good comparator which
trips when the ADJ pin is at 90% of its regulated value.
The PGOOD output is an open-collector transistor that is
off when the output is in regulation, allowing an external
resistor to pull the PGOOD pin high. Power good is valid
when the LTM8032 is enabled and V IN is above 3.6V.
Capacitor Selection Considerations
The C IN 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
8032fg
For more information www.linear.com/LTM8032
9
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相关代理商/技术参数 |
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| LTM8032IV#PBF | 功能描述:IC BUCK ADJ 2A 71LGA 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）:21V 电压 - 输入（最大）:32V Voltage - Output 1:24V 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 1.05" H（116.8mm x 47.2mm x 26.7mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
| LTM8032IVPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 3.3-36V LGA71 |
| LTM8032IY#PBF | 功能描述:IC DC/DC UMODULE 2A 71BGA 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:* |
| LTM8032MPV#PBF | 功能描述:IC BUCK ADJ 2A 71LGA 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:* |
| LTM8032MPVPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Noise EMC Compliant 36V, 2A DC/DC μModule |
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