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參數資料
| 型號： | SC2621ASTRT |
| 廠商： | Semtech Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Voltage Mode PWM Controller With Linear Power Regulator |
| 中文描述： | 電壓模式PWM控制器與線性電源穩壓器 |
| 文件頁數： | 1/14頁 |
| 文件大?。?/td> | 296K |
| 代理商： | SC2621ASTRT |
POWER MANAGEMENT
Description
1
www.semtech.com
SC2621A
Voltage Mode PWM Controller With
Linear Power Regulator
Features
Applications
February 21, 2007
Typical Application Circuit
The SC2621A provides the control and protection fea-
tures necessary for a synchronous buck converter and a
linear regulator in high performance graphic card appli-
cations.
The SC2621A 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 with 4V to 25V power rail and
as low as 0.5V output. The SC2621A is capable to drive
a N-type MOSFET in a linear regulator with as low as 0.5V
output.
The SC2621A features soft-start, supply power under
voltage lockout, and hiccup mode over current protec-
tion. The SC2621A 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 SC2621A is offered in SOIC-14 package.
4V to 25V power rails
Internal LDO for optimum gate drive voltage
1.5A gate drive current
Adaptive non-overlapping gate drives provide
shoot-through protection for MOSFETs
Programmable output voltages
Internal soft start for both outputs
Power rail under voltage lockout
Hiccup mode short circuit protection
SOIC-14 package, fully RoHS and WEEE compliant
Graphics processor power supplies on PCI-Express
platform
Embedded, low cost, high efficiency converters
Point of load power supplies
12V IN
1.5V OUT
U2
SC2621A
1
2
3
4
10
11
12
14
5
13
6
7
9
8
BST
OCS
COMP
FB
DRV
DL
GND
DH
LDOG
PN
LDFB
GND
NC
VCC
+
+
2.5V OUT
3.3V IN
+
1
2
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PDF描述 |
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| SC2621 | 500kHz Voltage Mode PWM Controller With Linear Power Regulator |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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: |
| SC-264 | 制造商:TSAY-E International 功能描述: |
| SC2642 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multi-Platform Two-Phase PWM Controller |
| SC2642EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multi-Platform Two-Phase PWM Controller |
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