参数资料
| 型号： | SC2443MLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC DUAL SYNC STP-DN CTRLR 24MLPQ |
| 标准包装： | 1 |
| 应用： | 控制器，DDR |
| 输入电压： | 4.75 V ~ 16 V |
| 输出数： | 2 |
| 输出电压： | 可调至 0.5V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-MLPQ |
| 供应商设备封装： | 24-MLPQ（4x4） |
| 包装： | 标准包装 |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC2443MLDKR |
SC2443
POWER MANAGEMENT
Features
u Wide input voltage range: 4.7V to 16V
u 0.5V feedback voltage for low-voltage outputs
u Programmable frequency up to 1 MHz per phase
u 2-Phase synchronous continuous conduction mode for
high efficiency step-down converters
u Out-of-phase operation for low input current ripples
u Output source and sink currents
u Fixed frequency peak current-mode control
u 75mV/-110mV maximum current sense voltage
u Inductor DCR current-sensing for low-cost applications
u Dual outputs or 2-phase single output operation
u Excellent current sharing between individual phases
u Individual soft-start, overload shutdown and enable
u External reference input for DDR applications
u External synchronization
u Industrial temperature range
u 4mm X 4mm X1mm 24-lead MLPQ package
Applications
u Telecommunication power supplies
u DDR memory power supplies
u Graphic power supplies
u Servers and base stations
Typical Application Circuit
Dual-Phase Single or Two Output
Synchronous Step-Down Controller
Description
The SC2443 is a high-frequency dual synchronous step-down
switching power supply controller. It provides out-of-phase
high-current output gate drives to all N-channel MOSFET power
stages. The SC2443 operates in synchronous continuous-con-
duction mode. Both phases are capable of maintaining regula-
tion with sourcing or sinking load currents, making the SC2443
suitable for generating both VDDQ and the tracking VTT for
DDR applications.
The SC2443 employs fixed frequency peak current-mode con-
trol for the ease of frequency compensation and fast transient
response.
The dual-phase step-down controllers of the SC2443 can be
used to produce two individually controlled and regulated out-
puts or a single output with shared current in each phase. The
Step-down controllers operate from an input of at least 4.7V
and are capable of regulating outputs as low as 0.5V
Individual soft-start and overload shutdown timer is included
in each step-down controller. The SC2443 implements hiccup
overload protection. In single output current share configura-
tion, the master timer controls the soft-start and overload shut-
down functions of both controllers.
VOUT1 VP1
VIN
VIN
VOUT1 VP1
VIN
VIN
U1
VP1
VOUT1
IN1-
U1
VP1
VOUT1
IN1-
IN1-
1
2
IN1-
COMP1
GDL1
PVCC
18
17
IN1-
1
2
IN1-
COMP1
GDL1
PVCC
18
17
3
4
SYNC
AGND
SC2443
PGND
GDL2
16
15
VIN
3
4
SYNC
AGND
SC2443
PGND
GDL2
16
15
VIN
5
6
REF
REFIN
GDH2
BST2
14
13
VOUT2
IN2-
5
6
REF
REFIN
GDH2
BST2
14
13
VIN
VIN
IN2-
Aug. 2008
Dual Independent Outputs
Single Output With Current Sharing
1
相关PDF资料 |
PDF描述 |
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| SC2595MLTRT | IC DDR TERMINATION REG 16-MLPQ |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC2446 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual-Phase Single or Two Output Synchronous Step-Down Controllers |
| SC2446A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual-Phase, Single or Dual Output Synchronous Step-Down Controller |
| SC2446AEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual-Phase, Single or Dual Output Synchronous Step-Down Controller |
| SC2446AITSTRT | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual-Phase, Single or Dual Output Synchronous Step-Down Controller |
| SC2446EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual-Phase Single or Two Output Synchronous Step-Down Controllers |
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