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TPS51275B-1RUKR PDF预览

TPS51275B-1RUKR

更新时间: 2024-11-27 01:10:27
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德州仪器 - TI 开关
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描述
TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs

TPS51275B-1RUKR 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active包装说明:WQFN-20
Reach Compliance Code:compliantECCN代码:EAR99
Factory Lead Time:8 weeks风险等级:1.72
Samacsys Description:TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs, with 3.2ms soft start.模拟集成电路 - 其他类型:DUAL SWITCHING CONTROLLER
控制技术:PULSE WIDTH MODULATION最大输入电压:24 V
最小输入电压:5 V标称输入电压:12 V
JESD-30 代码:S-PQCC-N20JESD-609代码:e4
长度:3 mm湿度敏感等级:2
功能数量:1端子数量:20
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:20 A最大输出电压:5.1 V
最小输出电压:4.85 V标称输出电压:3.3 V
封装主体材料:PLASTIC/EPOXY封装代码:HVQCCN
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
座面最大高度:0.8 mm表面贴装:YES
切换器配置:BUCK最大切换频率:355 kHz
温度等级:INDUSTRIAL端子面层:Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式:NO LEAD端子节距:0.4 mm
端子位置:QUAD宽度:3 mm
Base Number Matches:1

TPS51275B-1RUKR 数据手册

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TPS51275B-1  
SLVSCT3 MARCH 2015  
TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs  
1 Features  
2 Applications  
1
Input Voltage Range: 5 V to 24 V  
Notebook Computers  
Tablet Computers  
Output Voltages: 5 V and 3.3 V (Adjustable Range  
±10%)  
Desktop Computers  
Built-in, 100-mA, 5-V, and 3.3-V LDOs  
Clock Output for Charge-Pump  
±1% Reference Accuracy  
3 Description  
The TPS51275B-1 device is a cost-effective, dual-  
synchronous buck controller targeted for notebook  
system-power supply solutions. The device has 5-V  
and 3.3-V low-dropout regulators (LDOs) and  
requires few external components. The 260-kHz  
VCLK output can be used to drive an external charge  
pump, generating gate drive voltage for the load  
switches without reducing the main converter  
efficiency. The TPS51275B-1 device supports high  
efficiency, fast transient response and provides a  
combined power-good signal. Adaptive on-time, D-  
CAP control provides convenient and efficient  
operation. The device operates with a supply input  
voltage ranging from 5 to 24 V and supports output  
voltages of 5 V and 3.3 V. The TPS51275B-1 device  
is available in a 20-pin, 3-mm × 3-mm, WQFN  
package and is specified from –40°C to 85°C.  
Adaptive On-Time D-CAP™ Mode Control  
Architecture with 300-kHz and 355-kHz Frequency  
Setting  
Out-of-Audio™ (OOA) Light-Load Operation  
Internal 3.2-ms Voltage Servo Soft-Start  
Low-Side RDS(on) Current Sensing Scheme  
Built-In Output Discharge Function  
Separate Enable Input for Switchers  
Dedicated OC Setting Terminals  
Power Good Indicator  
OVP, UVP, and OCP Protection  
Non-Latch UVLO and OTP Protection  
20-Pin, 3-mm × 3-mm, WQFN (RUK) Package  
Device Information(1)  
PART NUMBER  
SKIP MODE  
ALWAYS ON-LDO  
TPS51275B-1  
OOA  
VREG3 and VREG5  
(1) For all available packages, see the orderable addendum at  
the end of the datasheet.  
4 Typical Application Diagram  
V
IN  
TPS51275B-1  
VIN  
VBST1  
DRVH1  
VBST2  
DRVH2  
V
V
OUT  
OUT  
5 V  
3.3 V  
SW1  
SW2  
DRVL1  
VO1  
DRVL2  
VFB1  
CS1  
VFB2  
CS2  
VCLK  
EN1  
PGOOD  
EN2  
PGOOD  
V
15 V  
OUT  
5-V EN  
3.3-V EN  
VREG5  
VREG3  
3.3-V Always ON  
5 V  
Always ON  
1 µF  
1 µF  
UDG-12091  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 

TPS51275B-1RUKR 替代型号

型号 品牌 替代类型 描述 数据表
TPS51275B-1RUKT TI

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