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參數(shù)資料
| 型號： | SC2544 |
| 廠商： | Semtech Corporation |
| 英文描述： | High Performance Wide Input Range Dual Synchronous Buck Controller |
| 中文描述： | 高性能寬輸入范圍的雙同步降壓控制器 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 1063K |
| 代理商： | SC2544 |
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www.semtech.com
SC2544
High Performance Wide Input Range
Dual Synchronous Buck Controller
POWER MANAGEMENT
Description
The SC2544 is a high performance dual PWM controller.
It is designed to convert a wide ranged input voltage down
to two independent output rails. The PWM operations of
the two channels are 180 degree out of phase which
can greatly reduce the size and the cost of the input
capacitors. Synchronous Buck PWM topology and volt-
age mode control allow high efficiency operation, fast
transient responses, and flexible component selection
for easy designs. A 10V internal linear regulator pro-
vides the bias for the controller, and this voltage is opti-
mized for gate drivers to deliver high efficiency. The power
sequencing is fully supported including independent start
up, and power good output. In the shut down mode the
controller only draws 100nA from the supply. The con-
troller also offers full protection features for the condi-
tions of under voltage, over voltage, and the over cur-
rent. There is no need for a current sensing resistor
because the MOSFET on resistance is used for the sens-
ing element. The switching frequency is adjustable from
100 kHz to 300 kHz. Two packages TSSOP-24 and MLPQ-
24 are offered.
Revision: August 10, 2005
Features
Independent dual-outputs
Wide input voltage range: 4.5V~28V
Adjustable output voltage down to 0.75V
Flexible power sequencing with enable and
power good output
Synchronous Buck topology with voltage mode
control
Out of phase operation to reduce cost of input
capacitor
10V internal regulator for gate driver to deliver
high efficiency
Programmable switching
frequency:100kHz~300kHz
Full protection: UVLO, OVP and programmable
OCP
No need for current sense resistor
Low shutdown current (100nA typical)
24 lead TSSOP and MLPQ packages
Fully WEEE and RoHS Compliant
Typical Application Circuit
Applications
Systems with 4.5V~28V input
LCDTV and PDPTV
Network and telecom systems
Portable devices
Pinout shown as TSSOP-24.
VIN+
VO2
FB2
VCC
VIN+
VO1
FB1
VCC
ENABLE
VIN+
SC2544
1
2
3
4
5
6
7
8
9
10
11
24
23
22
21
20
19
18
16
14
13
12
15
17
VIN
VCC
EN
FB1
ERROUT1
SS1
ILIM1
BST1
DRVH1
PHASE1
DRVL1
AGND
ROSC
PWRGD
FB2
ERROUT2
SS2
ILIM2
DRVH2
DRVL2
PVCC
PGND
PHASE2
BST2
PWGRD
FB1
VO1
FB2
相關PDF資料 |
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|---|---|
| SC2545 | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2545EVB | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2545MLTRT | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2545TSTRT | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2595 | Integrated Linear DDR Termination Regulator |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SC2544MLTRT | 功能描述:IC REG CTRLR BUCK PWM VM 24-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| SC2544TSTRT | 功能描述:IC REG CTRLR BUCK PWM VM 24TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| SC2545 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2545EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2545MLTRT | 制造商:Semtech Corporation 功能描述:Controller IC |
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