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MP2380DN

更新时间： 2024-01-04 05:10:44
品牌 Logo 应用领域
芯源 - MPS 开关光电二极管
页数 文件大小 规格书
11页 366K
描述
Switching Regulator, Current-mode, 7.3A, 800kHz Switching Freq-Max, PDSO8, MS-012BA, SOIC-8

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MP2380DN 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Not Recommended零件包装代码：SOIC
包装说明：SOIC-8针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.18
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：21 V
最小输入电压：4.5 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G8长度：4.9 mm
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：7.3 A封装主体材料：PLASTIC/EPOXY
封装代码：HLSOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.7 mm最大供电电流 (Isup)：1.1 mA
标称供电电压 (Vsup)：12 V表面贴装：YES
切换器配置：BUCK最大切换频率：800 kHz
温度等级：INDUSTRIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3.9 mm
Base Number Matches：1

MP2380DN 数据手册

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MP2380 – 5A, 21V, 600KHz STEP-DOWN CONVERTER  
Enable/Synch Control  
Thermal Shutdown  
The MP2380 has a dedicated Enable/Synch  
control pin (EN/SYNC). By pulling it high or low,  
the IC can be enabled and disabled by EN. Tie  
EN to VIN for automatic start up. To disable the  
part, EN must be pulled low for at least 5µs.  
Thermal shutdown is implemented to prevent  
the chip from operating at exceedingly high  
temperatures. When the silicon die temperature  
is higher than 150°C, it shuts down the whole  
chip. When the temperature is lower than its  
lower threshold, typically 140°C, the chip is  
enabled again.  
The MP2380 can be synchronized to external  
clock range from 300KHz up to 1.4MHz through  
the EN/SYNC pin. The internal clock rising  
edge is synchronized to the external clock rising  
edge.  
Floating Driver and Bootstrap Charging  
The floating power MOSFET driver is powered  
by an external bootstrap capacitor. This floating  
driver has its own UVLO protection. This  
UVLO’s rising threshold is 2.2V with a  
hysteresis of 150mV. The bootstrap capacitor  
voltage is regulated internally (Figure 2). Even  
at no load condition, as long as VIN is 3V higher  
than VOUT, C4 will have enough voltage  
provided by VIN through D2, M2, C4, L1 and C2.  
If (VIN-VSW) is more than 5V, U2 will regulate M2  
to maintain a 5V BST voltage across C4.  
Under-Voltage Lockout (UVLO)  
Under-voltage lockout (UVLO) is implemented  
to protect the chip from operating at insufficient  
supply voltage. The MP2380 UVLO comparator  
monitors the output voltage of the internal  
regulator,VCC. The UVLO rising threshold is  
about 4.0V while its falling threshold is about  
3.6V.  
Internal Soft-Start  
D2  
The soft-start is implemented to prevent the  
converter output voltage from overshooting  
during startup. When the chip starts, the  
internal circuitry generates a soft-start voltage  
(SS) ramping up from 0V to 1.2V. When it is  
lower than the internal reference (REF), SS  
overrides REF so the error amplifier uses SS as  
the reference. When SS is higher than REF,  
REF regains control.  
V
IN  
M2  
+
--  
BST  
SW  
+
--  
U2  
5V  
C4  
V
OUT  
L1  
C2  
Over-Current-Protection and Hiccup  
The MP2380 has cycle-by-cycle over current  
limit when the inductor current peak value  
exceeds the set current limit threshold.  
Meanwhile, output voltage starts to drop until  
FB is below the Under-Voltage(UV) threshold,  
typically 30% below the reference. Once a UV  
is triggered, the MP2380 enters hiccup mode to  
periodically restart the part. This protection  
mode is especially useful when the output is  
dead-short to ground. The average short circuit  
current is greatly reduced to alleviate the  
thermal issue and to protect the regulator. The  
MP2380 exits the hiccup mode once the over  
current condition is removed.  
Figure 2—Internal Bootstrap Charging Circuit  
Startup and Shutdown  
If both VIN and EN are higher than their  
appropriate thresholds, the chip starts. The  
reference block starts first, generating stable  
reference voltage and currents, and then the  
internal regulator is enabled. The regulator  
provides stable supply for the remaining  
circuitries.  
Three events can shut down the chip: EN low,  
VIN low and thermal shutdown. In the shutdown  
procedure, the signaling path is first blocked to  
avoid any fault triggering. The COMP voltage  
and the internal supply rail are then pulled down.  
The floating driver is not subject to this  
shutdown command.  
MP2380 Rev.1.2  
5/26/2008  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2008 MPS. All Rights Reserved.  
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