TPS61131 - 具有 3.3V 200mA LDO 的 3.3V 90% 效率 SEPIC 转换器，用于单节/双节锂离子电池应用领域

TPS61131是TI德州仪器公司的一款转换器（集成开关）产品，TPS61131是具有 3.3V 200mA LDO 的 3.3V 90% 效率 SEPIC 转换器，用于单节/双节锂离子电池应用领域，本站介绍了TPS61131的封装应用图解、特点和优点、功能等，并给出了与TPS61131相关的TI元器件型号供参考。

TPS61131 - 具有 3.3V 200mA LDO 的 3.3V 90% 效率 SEPIC 转换器，用于单节/双节锂离子电池应用领域 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

Synchronous, Up to 90% Efficient, SEPIC Converter With 300-mA Output Current From 2.5-V Input
Integrated 200-mA Reverse Voltage Protected LDO for DC-DC Output Voltage Post Regulation or Second Output Voltage
40-μA (Typical) Quiescent Current
Input Voltage Range: 1.8 V to 5.5 V
Fixed and Adjustable Output Voltage Options up to 5.5 V
Power Save Mode for Improved Efficiency at Low-Output Power
Low Battery Comparator
Power Good Output
Low EMI-Converter (Integrated Antiringing Switch)
Load Disconnect During Shutdown
Overtemperature Protection
Available in a Small 4-mm × 4-mm VQFN-16 or in a TSSOP-16 Package

产品应用

All Single Cell Li, Dual or Triple Cell Battery or USB Powered Products as MP-3 Player, PDAs, and Other Portable Equipment
Dual Input or Dual Output Mode
High Efficient Li-Ion to 3.3-V Conversion

Typical Application Schematic

产品说明

The TPS6113x devices provide a complete power supply solution for products powered by either a one-cell Li-Ion or Li-Polymer, or two- to four-cell Alkaline, NiCd, or NiMH batteries. The devices can generate two regulated output voltages. It provides a simple and efficient buck-boost solution for generating 3.3 V out of an input voltage that can be both higher and lower than the output voltage. The converter provides a maximum output current of at least 300 mA with supply voltages down to 1.8 V. The implemented SEPIC converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. The maximum peak current in the SEPIC switch is limited to a value of 1600 mA.

The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. A low-EMI mode is implemented to reduce ringing, and in effect, lower radiated electromagnetic energy when the converter enters the discontinuous conduction mode. A power good output at the SEPIC stage provides additional control of any connected circuits like cascaded power supply stages, or microprocessors.

The built-in LDO can be used for a second output voltage derived either from the SEPIC output or directly from the battery. The output voltage of this LDO can be programmed by an external resistor divider or is fixed internally on the chip. The LDO can be enabled separately, that is, using the power good of the SEPIC stage. The device is packaged in a 16-pin VQFN package measuring 4 mm × 4 mm (RSA) or in a 16-pin TSSOP (PW) package.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS61130	TSSOP (16)	5.00 mm × 4.40 mm
TPS61130	VQFN (16)	4.00 mm × 4.00 mm
TPS61131	TSSOP (16)	5.00 mm × 4.40 mm
TPS61132	TSSOP (16)	5.00 mm × 4.40 mm

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