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參數資料
| 型號： | SC2621 |
| 廠商： | Semtech Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 500kHz Voltage Mode PWM Controller With Linear Power Regulator |
| 中文描述： | 500kHz的電壓模式PWM控制器與線性電源穩壓器 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 242K |
| 代理商： | SC2621 |
POWER MANAGEMENT
Description
1
www.semtech.com
SC2621
500kHz Voltage Mode PWM Controller
With Linear Power Regulator
Features
Applications
December 17, 2004
Typical Application Circuit
The SC2621 provides the control and protection features
necessary for a synchronous buck converter and a lin-
ear regulator in high performance graphic card applica-
tions.
The SC2621 is designed to directly drive the top and
bottom MOSFETs of the buck converter. It uses an inter-
nal 8.2V supply as the gate drive voltage for minimum
driver power loss and MOSFET switching loss. It allows
the converter to operate at 500kHz switching frequency
with 4V to 16V power rail and as low as 0.5V output. The
SC2621 is capable to drive a N-type MOSFET in a linear
regulator with as low as 0.5V output.
The SC2621 features soft-start, supply power under volt-
age lockout, and hiccup mode over current protection.
The SC2621 monitors the output current by using the
Rdson of the bottom MOSFET in the buck converter that
eliminates the need for a current sensing resistor. The
SC2621 is offered in a SOIC-14 package.
500kHz switching frequency
4V to 16V power rails
Internal LDO for optimum gate drive voltage
1.5A gate drive current
Programmable output voltages
Internal soft start
Power rail under voltage lockout
Hiccup mode short circuit protection
SOIC-14 package
Graphics processor power supplies on PCI-Express
platform
Embedded, low cost, high efficiency converters
Point of load power supplies
1.5V OUT
+
+
1
2
2.5V OUT
3.3V IN
+
12V IN
SC2621
1
2
3
4
10
11
12
14
5
13
6
7
9
8
PN
LDOG
LDFB
OCS
DL
DRV
BST
DH
FB
NC
COMP
NC
GND
VCC
相關PDF資料 |
PDF描述 |
|---|---|
| SC2621STRT | 500kHz Voltage Mode PWM Controller With Linear Power Regulator |
| SC2642EVB | Multi-Platform Two-Phase PWM Controller |
| SC2642TSTR | Multi-Platform Two-Phase PWM Controller |
| SC2642TSTRT | Multi-Platform Two-Phase PWM Controller |
| SC2642 | Multi-Platform Two-Phase PWM Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC2621A | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Voltage Mode PWM Controller With Linear Power Regulator |
| SC2621AEVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Voltage Mode PWM Controller With Linear Power Regulator |
| SC2621ASTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Voltage Mode PWM Controller With Linear Power Regulator |
| SC2621STRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:500kHz Voltage Mode PWM Controller With Linear Power Regulator |
| SC2628TSK.TRT | 制造商:Semtech Corporation 功能描述: |
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