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參數(shù)資料
| 型號： | LM3103MH |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER㈢ Synchronous 1MHz 0.75A Step-Down Voltage Regulator |
| 中文描述： | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大小： | 304K |
| 代理商： | LM3103MH |
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
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM3103MH/NOPB | 功能描述:直流/直流開關轉換器 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 |
| LM3103MHX/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM310H | 制造商:National Semiconductor 功能描述:310 NSC'83 SB51C 制造商:Texas Instruments 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| LM310H/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Buffer/Voltage Follower |
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