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参数资料
| 型号： | LM21215MHX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 23.5 A SWITCHING REGULATOR, 525 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | TSSOP-20 |
| 文件页数： | 12/24页 |
| 文件大小： | 512K |
| 代理商： | LM21215MHX |
Connection Diagram
30103702
Top View
eTSSOP-20 Package
Ordering Information
Order Number
Package Type
NSC Package Drawing
Package Marking
Supplied As
LM21215MH
eTSSOP-20
MYB20A
LM21215MH
73 Units per Rail
LM21215MHX
eTSSOP-20
MYB20A
LM21215MH
2500 Units Per Reel
Pin Descriptions
Pins
Name
Description
1
ILIM
Resistor-programmable current limit pin. A resistor connected to this pin and
ground will set the value of the rising current limit I
CLR. Shorting this pin to AGND
will program the device to the maximum possible current limit.
2
SS/TRK
Soft-start control pin. An internal 2A current source charges an external capacitor
connected between this pin and AGND to set the output voltage ramp rate during
startup. This pin can also be used to configure the tracking feature.
3
EN
Active high enable input for the device. If not used, the EN pin can be left open,
which will go high due to an internal current source.
4
AVIN
Analog input voltage supply that generates the internal bias. It is recommended to
connect PVIN to AVIN through a low pass RC filter to minimize the influence of
input rail ripple and noise on the analog control circuitry.
5,6,7
PVIN
Input voltage to the power switches inside the device. These pins should be
connected together at the device. A low ESR input capacitance should be located
as close as possible to these pins.
8,9,10
PGND
Power ground pins for the internal power switches.
11-16
SW
Switch node pins. These pins should be tied together locally and connected to the
filter inductor.
17
PGOOD
Open-drain power good indicator.
18
COMP
Compensation pin is connected to the output of the voltage loop error amplifier.
19
FB
Feedback pin is connected to the inverting input of the voltage loop error amplifier.
20
AGND
Quiet analog ground for the internal reference and bias circuitry.
EP
Exposed Pad
Exposed metal pad on the underside of the package with an electrical and thermal
connection to PGND. It is recommended to connect this pad to the PC board
ground plane in order to improve thermal dissipation.
www.national.com
2
LM21215
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM21215MHX/NOPB | 功能描述:直流/直流开关转换器 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 |
| LM212B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| LM212D | 制造商:TI 制造商全称:Texas Instruments 功能描述:OPERATIONAL AMPLIFIERS/BUFFERS |
| LM212H | 制造商:Motorola Inc 功能描述: |
| LM212JG | 制造商:TI 制造商全称:Texas Instruments 功能描述:OPERATIONAL AMPLIFIERS/BUFFERS |
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