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參數資料
| 型號： | SC2542 |
| 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： | 1/27頁 |
| 文件大?。?/td> | 688K |
| 代理商： | SC2542 |
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www.semtech.com
SC2542
High Performance Wide Input Range
Dual Synchronous Buck Controller
POWER MANAGEMENT
Description
SC2542 is a high performance dual PWM controller. It is
designed to convert a widely ranged battery rail down to
two independent output rails. The PWM operation of the
two channels are 180 degrees out of phase which can
greatly reduce the size and the cost of the input capaci-
tors. Synchronous buck PWM topology and voltage mode
control allow fast transient response and flexible com-
ponent selection for easy designs. A 5V standby regula-
tor is integrated. A 10V internal linear regulator provides
the bias for the controller, and this voltage is optimized
for gate drivers to deliver high efficiency.
Revision: August 24, 2005
Features
Independent dual-switcher-outputs
Integrated 5V standby output with over 50mA
capability
Wide input voltage range: 6.5V ~ 28V
Adjustable output voltage down to 0.75V
Light load efficiency enhancement
Programmable skip mode operation
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 standby operating current (200
μA typical)
Low shut down current (100nA typical)
28 lead TSSOP package with exposed die pad
(EDP)
Fully WEEE package and RoHS Compliant
Applications
Notebook computer system power
Systems with 6.5V ~ 28V input
Network and telecom systems
Other portable devices
Typical Application Circuit
The light load efficiency can be greatly improved by turn-
ing off the low side MOSFET upon reversal of inductor
current. There is no need for a current sensing resistor
because the MOSFET on resistance is used as the sens-
ing element. Under extreme light load conditions, the
device will operate in a pulse skip mode. The switching
frequency can be dropped significantly to a level pro-
grammed by external resistors. The battery energy is bet-
ter utilized with these efficiency enhancement schemes.
The power sequencing is fully supported including inde-
pendent start up and power good output. In shutdown
mode the controller only draws 100nA from the supply.
The controller also offers full protection features for the
conditions of under voltage, over voltage, and over cur-
rent. The switching frequency is adjustable from 100KHz
to 300KHz. TSSOP-28-EDP package is offered.
VCC
FB2
STBY MODE
FB1
FB1
VO1
ENABLE
PWGRD
VCC
5VSBY
VO2 (5V/10A)
VIN+
VIN+
VIN+
FB2
VO1 (3.3V/10A)
TH-PAD
SC2542
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VIN
VCC
EN
STBY
FB1
ERROUT1
MINSET1
SS1
ILIM1
BST1
DRVH1
PHASE1
PHASE2
DRVH2
BST2
ILIM2
SS2
MINSET2
ERROUT2
FB2
PWRGD
ROSC
5VSBY
AGND
DRVL1
PGND
PVCC
DRVL2
相關PDF資料 |
PDF描述 |
|---|---|
| SC2542EVB | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2542TETRT | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2544 | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2545 | High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2545EVB | High Performance Wide Input Range Dual Synchronous Buck Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC2542EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Wide Input Range Dual Synchronous Buck Controller |
| SC2542TETRT | 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 0.75V 28-Pin TSSOP EP T/R |
| SC2544 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Wide Input Range Dual Synchronous Buck Controller |
| 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: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: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® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
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