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参数资料
| 型号： | DC1623A |
| 厂商： | Linear Technology |
| 文件页数： | 10/26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
OPERATION
The LTM8033 is a standalone nonisolated step-down
switching DC/DC power supply that can deliver up to 3A of
output current. It is an EMC product; its radiated emissions
are so quiet that it can pass the stringent requirements of
EN55022 class B as a stand alone product. This μModule
provides a precisely regulated output voltage program-
mable via one external resistor from 0.8V to 25V. The input
voltage range is 3.6V to 36V. Given that the LTM8033 is
a step-down converter, make sure that the input voltage
is high enough to support the desired output voltage and
load current.
As shown in the Block Diagram, the LTM8033 contains an
EMI filter, current mode controller, power switching ele-
ment, power inductor, power Schottky diode and a modest
amount of input and output capacitance. The LTM8033 is
a fixed frequency PWM regulator. The switching frequency
is set by simply connecting the appropriate resistor value
from the RT pin to GND.
An internal regulator provides power to the control cir-
cuitry. The bias regulator normally draws 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 LTM8033 in shutdown, disconnecting the output and
reducing the input current to less than 1μA.
To further optimize efficiency, the LTM8033 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 LTM8033’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 LTM8033 contains a power good comparator which
trips when the ADJ pin is at roughly 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 LTM8033 is enabled and V IN is above
3.6V.
The LTM8033 is equipped with a thermal shutdown that
will inhibit power switching at high junction temperatures.
The activation threshold of this function, however, is above
125°C to avoid interfering with normal operation. Thus,
prolonged or repetitive operation under a condition in
which the thermal shutdown activates may damage or
impair the reliability of the device.
8033fa
10
For more information www.linear.com/LTM8033
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| 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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