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参数资料
| 型号： | LM20323AMHE |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | TSSOP-20 |
| 文件页数： | 12/20页 |
| 文件大小： | 492K |
| 代理商： | LM20323AMHE |
Connection Diagram
30077202
Top View
eTSSOP-20 Package
Ordering Information
Order Number
Package Type
NSC Package Drawing
Package Marking
Supplied As
LM20323AMH
eTSSOP-20
MXA20A
20323AMH
73 Units per Rail
LM20323AMHE
250 Units per Tape and Reel
LM20323AMHX
2500 Units per Tape and Reel
Pin Descriptions
Pin(s)
Name
Description
Application Information
1
SS/TRK
Soft-Start or Tracking control input
An internal 4.5 A current source charges an external capacitor to set
the soft-start rate. The PWM can track to an external voltage ramp with
a low impedance source. If left open, an internal 1 ms SS ramp is
activated.
2
FB
Feedback input to the error amplifier
from the regulated output
This pin is connected to the inverting input of the internal
transconductance error amplifier. An 800 mV reference is internally
connected to the non-inverting input of the error amplifier.
3
PGOOD
Power good output signal
Open drain output indicating the output voltage is regulating within
tolerance. A pull-up resistor of 10 k
to 100 k is recommended if this
function is used.
4
COMP
Output of the internal error amplifier and
input to the Pulse Width Modulator
The loop compensation network should be connected between the
COMP pin and the AGND pin.
5,6,15,16
VIN
Input supply voltage
Nominal operating range: 4.5V to 36V.
7,8,13,14
SW
Switch pin
The drain terminal of the internal Synchronous Rectifier power
NMOSFET and the source terminal of the internal Control power
NMOSFET.
9,10,11
GND
Ground
Internal reference for the power MOSFETs.
12
AGND
Analog ground
Internal reference for the regulator control functions.
17
BOOT
Boost input for bootstrap capacitor
An internal diode from VCC to BOOT charges an external capacitor
required from SW to BOOT to power the Control MOSFET gate driver.
18
VCC
Output of the high voltage linear
regulator. The VCC voltage is regulated
to approximately 5.5V.
VCC tracks VIN up to about 7.2V. Above VIN = 7.2V, VCC is regulated
to approximately 5.5 Volts. A 0.1 F to 1 F ceramic decoupling
capacitor is required. The VCC pin is an output only.
19
EN
Enable or UVLO input
An external voltage divider can be used to set the line undervoltage
lockout threshold. If the EN pin is left unconnected, a 2 A pull-up
current source pulls the EN pin high to enable the regulator.
20
NC
No Connection
Recommend connecting this pin to GND.
EP
Exposed
Pad
Exposed pad
Exposed metal pad on the underside of the package with a weak
electrical connection to GND. Connect this pad to the PC board ground
plane in order to improve heat dissipation.
www.national.com
2
LM20323A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM20323AMHX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:36V, 3A 500 kHz Synchronous Buck Regulator |
| LM20323EVAL | 功能描述:电源管理IC开发工具 LM20323 EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LM20323MH | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 36V 20-Pin TSSOP EP Rail 制造商:Texas Instruments 功能描述:BUCK REG, 3A, 4V/36V, POWERWISE, 20TSSOP 制造商:Texas Instruments 功能描述:IC, DC-DC CONV; Primary Input Voltage:36V; No. of Outputs:1; Output Voltage:32V; Output Current:3A; No. of Pins:20; Operating Temperature Min:-40C; Operating Temperature Max:125C; Operating Temperature Range:-40C to +125C ;RoHS Compliant: Yes |
| LM20323MH/NOPB | 功能描述:直流/直流开关转换器 36V,3A 500 KHZ SYNC BUCK REG RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM20323MHE | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 36V 20-Pin TSSOP EP T/R |
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