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参数资料
| 型号： | LM3151MHE-2.5 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | TSSOP-14 |
| 文件页数： | 14/20页 |
| 文件大小： | 479K |
| 代理商： | LM3151MHE-2.5 |
Pin Descriptions
Pin
Name
Description
Function
1
VCC
Supply Voltage for
FET Drivers
Nominally regulated to 5.95V. Connect a 1 F to 2.2 F decoupling capacitor from this
pin to ground.
2
VIN
Input Supply Voltage
Supply pin to the device. Nominal input range is 6V to 42V. See ordering information
for Vin limitations.
3
EN
Enable
To enable the IC apply a logic high signal to this pin greater than 1.26V typical or leave
floating. To disable the part, ground the EN pin.
4
FB
Feedback
Internally connected to the resistor divider network which sets the fixed output voltage.
This pin also senses the output voltage faults such a over-voltage and short circuit
conditions.
5,9
SGND
Signal Ground
Ground for all internal bias and reference circuitry. Should be connected to PGND at a
single point.
6
SS
Soft-Start
An internal 7.7 A current source charges an external capacitor to provide the soft-start
function.
7,8
N/C
Not Connected
Internally not electrically connected. These pins may be left unconnected or connected
to ground.
10
SW
Switch Node
Switch pin of controller and high-gate driver lower supply rail. A boost capacitor is also
connected between this pin and BST pin
11
HG
High-Side Gate
Drive
Gate drive signal to the high-side NMOS switch. The high-side gate driver voltage is
supplied by the differential voltage between the BST pin and SW pin.
12
BST
Connection for
Bootstrap Capacitor
High-gate driver upper supply rail. Connect a 0.33 F-0.47 F capacitor from SW pin to
this pin. An internal diode charges the capacitor during the high-side switch off-time. Do
not connect to an external supply rail.
13
LG
Low-Side Gate Drive
Gate drive signal to the low-side NMOS switch. The low-side gate driver voltage is
supplied by VCC.
14
PGND
Power Ground
Synchronous rectifier MOSFET source connection. Tie to power ground plane. Should
be tied to SGND at a single point.
EP
Exposed Pad
Exposed die attach pad should be connected directly to SGND. Also used to help
dissipate heat out of the IC.
3
www.national.com
LM3151/LM3152/LM3153
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3151MHE-3.3 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:SIMPLE SWITCHER 6~42V 14TSSOP 制造商:Texas Instruments 功能描述:SIMPLE SWITCHER, 6~42V, 14TSSOP 制造商:Texas Instruments 功能描述:SIMPLE SWITCHER, 6~42V, 14TSSOP, Primary Input Voltage:18V, No. of Outputs:1, Output Voltage:3.3V, Output Current:12A, Voltage Regulator Case Style:TSSOP, No. of Pins:14, Operating Temperature Min:-40C, Operating Temperature , RoHS Compliant: Yes |
| LM3151MHE-3.3/NOPB | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM3151MHX-3.3 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:SIMPLE SWITCHER? CONTROLLER, High Input Voltage Synchronous Step-Down |
| LM3151MHX-3.3/NOPB | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM3152 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:SIMPLE SWITCHER? CONTROLLER, High Input Voltage Synchronous Step-Down |
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