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参数资料
| 型号： | MCP1603EV |
| 厂商： | Microchip Technology |
| 文件页数： | 13/26页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL BUCK CONV MCP1603 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 0.8V，1.2V，1.8V，2.5V，和 3.3V |
| 电流 - 输出： | 500mA |
| 输入电压： | 2.7 ~ 5.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 2MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MCP1603 |
| 产品目录页面： | 664 (CN2011-ZH PDF) |
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MCP1603
4.3
Soft Start
4.6
Enable/Disable Control
The output of the MCP1603 is controlled during start-
up. This control allows for a very minimal amount of
V OUT overshoot during start-up from V IN rising above
the UVLO voltage or SHDN being enabled.
The SHDN pin is used to enable or disable the
MCP1603. When the SHDN pin is pulled low, the
device is disabled. When pulled high the device is
enabled and begins operation provided the input
voltage is not below the UVLO threshold or a fault
4.4
Overtemperature Protection
condition exists.
Overtemperature protection circuitry is integrated in the
MCP1603. This circuitry monitors the device junction
4.7
Undervoltage Lockout (UVLO)
temperature and shuts the device off, if the junction
temperature exceeds the typical 150°C threshold. If
this threshold is exceeded, the device will automatically
restart once the junction temperature drops by
approximately 10°C. The soft start is reset during an
overtemperture condition.
4.5 Overcurrent Protection
Cycle-by-cycle current limiting is used to protect the
MCP1603 from being damaged when an external short
circuit is applied. The typical peak current limit is
860 mA. If the sensed current reaches the 860 mA
limit, the P-Channel MOSFET is turned off, even if the
output voltage is not in regulation. The device will
attempt to start a new switching cycle when the internal
oscillator sets the internal RS latch.
? 2007 Microchip Technology Inc.
The UVLO feature uses a comparator to sense the
input voltage (V IN ) level. If the input voltage is lower
than the voltage necessary to properly operate the
MCP1603, the UVLO feature will hold the converter off.
When V IN rises above the necessary input voltage, the
UVLO is released and soft start begins. Hysteresis is
built into the UVLO circuit to compensate for input
impedance. For example, if there is any resistance
between the input voltage source and the device when
it is operating, there will be a voltage drop at the input
to the device equal to I IN x R IN . The typical hysteresis
is 140 mV.
DS22042A-page 13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP1603L | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.0 MHz, 500 mA Synchronous Buck Regulator |
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| MCP1603L-120I/MC | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.0 MHz, 500 mA Synchronous Buck Regulator |
| MCP1603L-120I/OS | 制造商:Microchip Technology Inc 功能描述:CONV DC-DC SGL-OUT STEP DOWN 5PIN TSOT - Rail/Tube |
| MCP1603L-150I/MC | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.0 MHz, 500 mA Synchronous Buck Regulator |
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