参数资料
| 型号： | SC2440TETRT |
| 厂商： | Semtech |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 2A DL 16TSSOP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出数： | 2 |
| 输入电压： | 2.8 V ~ 20 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-TSSOP |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC2440TEDKR |
SC2440
2.5 MHz Dual Switching Regulator
with Integrated 2A Switches
POWER MANAGEMENT
Description
The SC2440 is an adjustable frequency dual current-
mode switching regulator with 2A integrated switches.
Its high frequency operation allows the use of small
inductors and capacitors, resulting in very compact power
supplies. The SC2440 is suitable for next generation XDSL
modems requiring operating frequencies in excess of 1.5
MHz. The two channels operate at 180° out of phase
for reduced input voltage ripples. Separate soft start/
shutdown pins allow independent control and output
sequencing for latch-up prevention. The SC2440 can also
be externally synchronized up to 2.5 MHz per channel.
Current-mode PWM control allows fast transient
response with simple loop compensation. Cycle-by-cycle
current limiting and hiccup overload protection reduce
power dissipation during overload.
Features
u Up to 2.5 MHz/Channel Programmable Switching
Frequency
u Fixed Frequency Current-mode Control
u Wide Input Voltage Range 2.8V to 20V
u Out of Phase Switching Reduces Ripple
u Cycle-by-cycle Current-limiting
u Independent Shutdown/soft-start Pins
u Independent Hiccup Overload Protection
u Independent Power-Good Indicators
u Two 2A Integrated Switches
u External Synchronization
u Thermal Shutdown
u Thermally Enhanced 16-pin TSSOP Package
Applications
u XDSL and Cable Modems
Typical Application Circuit
R6
100K
u
u
u
u
u
Set-up Boxes
Point of Load Applications
CPE Equipment
DSP Power Supplies
Disk Drives
SC2440
V OUT2 = 5V
C5
R5
15.4K C6 470pF
C7 10pF
22nF
R9
C10 15K
FB1
PGOOD1 BOOST1
COMP1 SW1
SS1
SYNC
IN
ROSC
SS2
VIN
12V
C15
10 μ F
D3
C2 1N4148
0.1 μ F
L1
3.3 μ H
D1
UPS120
D2
UPS120
C1
10 μ F
R1
23.3K
R2
10K
OUT1
3.3V/2A
95
90
85
80
75
Efficiency vs Load Current
V IN = 12V
V OUT1 = 3.3V
22nF C9
R7 10pF C8
COMP2
SW2
C4
0.1 μ F
L2
4.4 μ H
D4
R3
40.2K
OUT2
5V/2A
70
65
24.3K
220pF
FB2
GND
BOOST2
PGOOD2
R8
100K
1N4148
C3
10 μ F
R4
10K
60
55
50
0
0.5
1
1.5
2
L1: Sumida CR43
L2: F alco D04012
Figure 1. 1.3MHz 12V to 3.3V and 5V Step-down Converter
Load Current (A)
Revision: March 5, 2007
1
www.semtech.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC2441 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A_09 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441AEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441ATETRT | 制造商:Semtech Corporation 功能描述: |
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