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參數(shù)資料
| 型號(hào)： | LM3103 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | SIMPLE SWITCHER㈢ Synchronous 1MHz 0.75A Step-Down Voltage Regulator |
| 中文描述： | 的SIMPLE SWITCHER㈢1MHz的0.75A同步降壓穩(wěn)壓器 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 304K |
| 代理商： | LM3103 |
Pin Descriptions
Pin
1, 2
3, 4
Name
VIN
SW
Description
Input supply voltage Supply pin to the device. Nominal input range is 4.5V to 42V.
Switch Node
Internally connected to the source of the main MOSFET and the drain of the
synchronous MOSFET. Connect to the output inductor.
Connection for
bootstrap capacitor
an internal diode during the main MOSFET off-time.
Analog Ground
Ground for all internal circuitry other than the PGND pin.
Soft-start
A 70 μA internal current source charges an external capacitor of larger than 22 nF to
provide the soft-start function.
No Connection
This pin should be left unconnected.
Ground
Must be connected to the AGND pin for normal operation. The GND and AGND pins
are not internally connected.
Feedback
Internally connected to the regulation and over-voltage comparators. The regulation
setting is 0.6V at this pin. Connect to feedback resistors.
Enable pin
Internal pull-up. Connect to a voltage higher than 1.6V to enable the device.
On-time Control
An external resistor from the VIN pin to this pin sets the main MOSFET on-time.
Startup regulator
Output
and AGND pins for stable operation.
Power Ground
Synchronous MOSFET source connection. Tie to a ground plane.
Exposed Pad
Thermal connection pad. Connect to the ground plane.
Application Information
5
BST
Connect a 33 nF capacitor from the SW pin to this pin. This capacitor is charged through
6
7
AGND
SS
8
NC
GND
9, 10
11
FB
12
13
14
EN
RON
VCC
Nominally regulated to 6V. Connect a capacitor of larger than 1 μF between the VCC
15, 16
DAP
PGND
EP
3
www.national.com
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PDF描述 |
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| LM3103MH | SIMPLE SWITCHER㈢ Synchronous 1MHz 0.75A Step-Down Voltage Regulator |
| LM3103MHX | SIMPLE SWITCHER㈢ Synchronous 1MHz 0.75A Step-Down Voltage Regulator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3103EVAL | 功能描述:電源管理IC開發(fā)工具 LM3103 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM3103EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM3103 EVAL BRD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM3103MH | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 42V 16-Pin TSSOP EP Tube 制造商:Texas Instruments 功能描述:IC, V REG, SYNCH, 0.75A, POWERWISE |
| LM3103MH/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 SYNC 1MHZ 0.75A STEP DOWN VLTG REG 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 |
| LM3103MHX | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 42V 16-Pin TSSOP EP T/R |
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