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參數資料
| 型號： | SC4612STRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Wide Input Range High Performance Synchronous Buck Switching Controller |
| 中文描述： | 寬輸入范圍高性能同步降壓開關控制器 |
| 文件頁數： | 1/24頁 |
| 文件大?。?/td> | 439K |
| 代理商： | SC4612STRT |
1
www.semtech.com
SC4612
Wide Input Range High Performance
Synchronous Buck Switching Controller
POWER MANAGEMENT
Description
SC4612 is a high performance synchronous buck controller
that can be configured for a wide range of applications.
The SC4612 utilizes synchronous rectified buck topology
where high efficiency is the primary consideration. SC4612
is optimized for applications requiring wide input supply
range and low output voltages down to 500mV.
Features
Wide voltage range, V
DD
= 28V, V
PWRIN
= 40V
Internally regulated DRV
Output voltage as low as 0.5V
1.7A gate drive capability
Asynchronous start up mode
Low side R
DS-ON
sensing with hiccup mode current
limit
Programmable current limit
Programmable frequency up to 1.2 MHz
Available in MLPD-12 and SOIC-14 Lead-free
packages. This product is fully WEEE and RoHS
compliant
Applications
Distributed power architectures
Telecommunication equipment
Servers/work stations
Mixed signal applications
Base station power management
Point of use low voltage high current applications
Typical Application Circuit
SC4612 implements an asynchronous soft-start mode,
which keeps the lower side MOSFET off during soft-start, a
desired feature when a converter turns on into a preset
external voltage or pre-biased output voltage. With the lower
MOSFET off, the external bus is not discharged, preventing
any disturbances in the start up slope and any latch-up of
modern day ASIC circuits.
SC4612 comes with a rich set of features such as regulated
DRV supply, programmable soft-start, high current gate
drivers, internal bootstrapping for driving high side
N-channel MOSFET, shoot through protection, R
sensing
with hiccup over current protection, and asynchronous start
up with over current protection.
Revision: January 31, 2007
Q1
Q2
L1
C8
C10
+
_
+
_
Vin
Vout
R3
R4
C5
R1
C1
C9
C2
R5
C3
D1
C7
C4
R2
R6
C6
ILIM
1
PHASE
12
OSC
2
SS/EN
3
FB
5
VDD
6
GND
7
DL
8
DRV
9
BST
10
DH
11
EAO
4
U1
SC4612MLP
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4614 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:500kHz Voltage Mode PWM Controller |
| SC4614EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:500kHz Voltage Mode PWM Controller |
| SC4614MSTRT | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 0.5V 1.5A 10-Pin MSOP T/R 制造商:Semtech Corporation 功能描述:SC4614 Series 500kHz Voltage Mode PWM Controller MSOP-10 |
| SC46166 | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:300mA ,500KHZ HIGH EFFICIENCY STEP-UP DC/DC CONVERTER |
| SC46166S | 制造商:SILAN 制造商全稱:Silan Microelectronics Joint-stock 功能描述:300mA ,500KHZ HIGH EFFICIENCY STEP-UP DC/DC CONVERTER |
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