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參數(shù)資料
| 型號(hào)： | MP1580HP |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2A, 380 KHz Step-Down Converter |
| 中文描述： | 3.6 A SWITCHING REGULATOR, 418 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 259K |
| 代理商： | MP1580HP |
MP1580 – 2A, 380KHz STEP-DOWN CONVERTER
MP1580 Rev. 3.0
12/5/2005
www.MonolithicPower.com
3
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2005 MPS. All Rights Reserved.
TM
ELECTRICAL CHARACTERISTICS
(continued)
V
IN
= 12V, T
A
= +25
°
C, unless otherwise noted.
Parameter
Maximum Duty Cycle
Minimum Duty Cycle
EN Shutdown Threshold Voltage
Enable Pull-Up Current
EN UVLO Threshold Rising
EN UVLO Threshold Hysteresis
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown
Symbol Condition
V
FB
= 1.0V
V
FB
= 1.5V
I
CC
> 100μA
V
EN
= 0V
V
EN
Rising
V
EN
≤
0.4V
V
EN
≥
2.6V, V
FB
= 1.4V
Min
0.7
1.15
2.37
Typ
90
1.0
1.46
2.495
210
23
1.0
160
Max
0
1.3
1.8
2.62
36
1.2
Units
%
%
V
μA
V
mV
μA
mA
°
C
Note:
4) Derate current limit 0.011A/°C.
PIN FUNCTIONS
Pin #
Name
Description
Bootstrap (C5). This capacitor is needed to drive the power switch’s gate above the
supply voltage. It is connected between SW and BS pins to form a floating supply across
the power switch driver. The voltage across C5 is about 5V and is supplied by the internal
+5V supply when the SW pin voltage is low.
Supply Voltage. The MP1580 operates from a +4.75V to +25V unregulated input. C1 is
needed to prevent large voltage spikes from appearing at the input.
Switch. This connects the inductor to either IN through M1 or to GND through M2.
Ground. This pin is the voltage reference for the regulated output voltage. For this reason
care must be taken in its layout. This node should be placed outside of the D1 to C1
ground path to prevent switching current spikes from inducing voltage noise into the part.
Feedback. An external resistor divider from the output to GND, tapped to the FB pin sets
the output voltage. To prevent current limit run away during a short circuit fault condition
the frequency foldback comparator lowers the oscillator frequency when the FB voltage is
below 700mV.
Compensation. This node is the output of the transconductance error amplifier and the
input to the current comparator. Frequency compensation is done at this node by
connecting a series R-C to ground. See the compensation section for exact details.
Enable/UVLO. A voltage greater than 2.62V enables operation. For complete low current
shutdown the EN pin voltage needs to be less than 700mV.
Synchronization Input. This pin is used to synchronize the internal oscillator frequency to
an external source. There is an internal 11k
pull down resistor to GND; therefore leave
SYNC unconnected if unused.
1
BS
2
IN
3
SW
4
GND
5
FB
6
COMP
7
EN
8
SYNC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP1580HP-LF | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A 380kHz Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MP1580HS | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 380 KHz Step-Down Converter |
| MP1580HS-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2A 380kHz Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1580HS-LF-Z | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A 380kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MP1582EN-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2A 1.5MHz 28V Nonsync Buck RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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