- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374721 > SC2441EVB (Semtech Corporation) Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter PDF資料下載
參數(shù)資料
| 型號： | SC2441EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| 中文描述： | 非常低的輸入電壓2相同步降壓與升壓轉(zhuǎn)換器控制器 |
| 文件頁數(shù)： | 1/35頁 |
| 文件大?。?/td> | 733K |
| 代理商： | SC2441EVB |
當(dāng)前第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
POWER MANAGEMENT
Description
1
www.semtech.com
SC2441
Very Low Input Voltage 2-Phase Synchronous
Step-down Controllers with Step-up Converter
Revision: January 10, 2005
The SC2441 is a high-frequency
triple
output switching
regulator controller. It consists of a dual out-of-phase
synchronous step-down PWM controller with high-current
output gate drives and a 1.7A integrated step-up switch-
ing regulator.
The dual-phase step-down controller of the SC2441 can
be configured to provide two individually controlled and
regulated outputs or a single output with shared current
in each phase. The buck controller can operate from an
input voltage of at least 4.72V or they can run off a supply
generated locally with the integrated boost regulator. This
makes the SC2441 ideally suited for applications where a
low-voltage input (3.3V, 2.5V, or 1.8V) is to be stepped
down for lower voltage logic yet the input is too low to
drive power MOSFET’s efficiently. The boost regulator can
be used to provide a third auxiliary output while generat-
ing the bias for the buck controllers.
Both the step-down controllers and the step-up regulator
employ fixed frequency peak current-mode control for fast
transient response. The master oscillator frequency can
be programmed by the user.
Individual soft-start and overload shutdown timer are em-
ployed in each step-down controller for hiccup overload
protection. In single-output configuration, the channel 1
timer controls the soft-start and overload shutdown func-
tions of both controllers.
Typical Application Circuit
Features
2-Phase Synchronous step-down controllers
2-Phase Synchronous Continuous Conduction Mode
For High Efficiency Step-down Converters
Out of Phase Operation For Low Input Current Ripples
Operates Up To 1MHz Per Channel
Configurable Dual Outputs Or 2-Phase Single Output
Operation with Peak Current Mode Control
Excellent Current Sharing Between Phases
Wide Input Voltage Range: 1.8V to 15V
Duty Cycle Up to 90%
0.5V Feedback Voltages For Low-Voltage Outputs
Precision 50mV Current-Limit Threshold
Patented Combi-sense Technique for High SNR of Cur-
rent-Sensing
Individual Soft-Start, Overload Shutdown and Enable
Step-up Regulator
Wide Input Voltage Range: 1.8V to 15V
Operates At Twice The Individual Channel Frequency
Of The Buck Controllers
0.23V V
CESAT
Switch at 1A
Fixed Frequency with Current-Mode Control
Common Features
External Synchronization
Industrial Temperature Range
Applications
Low Voltage Distributed DC-DC Converters
Telecommunication Power Supplies
Servers and base stations
L3
D3
R12
R14
C28
L1
C27
+
C1
Q1
RCS+2
R10
R7
RCS-2
+
C15
R9
C2
VO2GND
C30
RCS+1
D7
R28
C17
C23
C36
VIN
D1
R13
VO1
VINGND
R6
+
C38
R4
L2
D2
C20
R19
+
C8
C32
Q7
R3
D10
U1
SC2441
IN
1
PGND
24
GDH2
19
BST2
18
FB1
11
VPN1
26
SYNC
6
CS1+
4
PVIN
28
COMP1
12
SS1/EN1
3
CS1-
5
SS2/EN2
17
COMP2
13
FB2
14
COMP3
8
CS2-
15
CS2+
16
VPN2
2
FB3
7
BST1
25
GDH1
23
GDL1
22
GDL2
20
PH3
27
Rosc
10
GND
9
VCC
21
VO2
C24
R8
RCS-1
R17
C31
C3
VO1GND
C21
R11
C18
C19
R18
+
C4
Q6
C33
C25
R20
R16
R5
Q2
VIN
VIN
VIN
US patent 6,441,597
Figure 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC2441ITSTRT | Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2442 | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2442H | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2442HITSTR | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2442HITSTRT | High Performance Wide Input Range Dual Synchronous Buck Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC2441ITSTRT | 制造商:Semtech Corporation 功能描述:Controller IC |
| SC2442 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2442H | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2442HITSTR | 制造商:Semtech Corporation 功能描述: |
| SC2442HITSTRT | 制造商:Semtech Corporation 功能描述:Controller IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。