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參數(shù)資料
| 型號(hào)： | LM2630MTC-ADJX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | PLASTIC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 3/14頁(yè) |
| 文件大小： | 373K |
| 代理商： | LM2630MTC-ADJX |
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Application Circuits
A typical application circuit is shown in Figure 2, with some of
the components values shown in Table 1.
10012004
FIGURE 2. The Typical 2.5V Application Circuit
TABLE 1. Components for Typical 2.5V, 300kHz Application Circuits
Input Voltage
4.75V to 24V
4.5V to 6V
Output Current
4A
10A
Application
Notebook
Desktop
Q1 and Q2
Fairchild FDS6680; Siliconix Si4410DY;
or International Rectifier IRF7805
Fairchild FDB7030L; or Motorola
MTB75N03HDL
Inductor L1
Sumida CDRH127-7R6: 7.6H, 5.9A
Pulse PE-53681: 2.5 H, 11.4A
Input Capacitors
2 x 22F, 35V Sprague 593D or TPS
2 x 220 F, 10V Sanyo OS-CON SA
Output Capacitors
2 x 220F, 10V Sprague 593D or TPS
3 x 330 F, 6.3V Sanyo OS-CON SA
Rectifier D1
Motorola MBRS140T3
Motorola MBRS340T3
Sensing Resistor R3
15 m
Ω IRC
3 x 20 m
Ω IRC
Compensation components C8 and R8
R8 = 3.3 K
Ω, C8 = 1 nF
R8 = 4 K
Ω, C8 = 1nF
When the input voltage is low (less than 5V), the bootstrap
function cannot deliver enough gate voltage to fully drive the
high-side MOSFET on, which increases Rdson, and conse-
quently reduces efficiency. An external charge-pump doubler
can be added to double the CBOOT pin voltage (see Figure
3). It can also be added to the VIN pin to increase the gate
drive voltage at both high-side and low-side MOSFETs.
11
www.national.com
100120 Version 9 Revision 2
Print Date/Time: 2011/08/25 17:11:52
LM2630
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PDF描述 |
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| LM2636MX/NOPB | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO20 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2630MTCX-ADJ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM2630MTCX-ADJ/NOPB | 制造商:Texas Instruments 功能描述:DC DC Cntrlr Single-OUT Step Down 4.5V to 30V Input 20-Pin TSSOP T/R |
| LM2631 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Synchronous Step-Down Power Supply Controller |
| LM2631MTC-ADJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| LM2633 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Advanced Two-Phase Synchronous Triple Regulator Controller for Notebook CPUs |
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