TPS61121 - 具有 1.5V 200mA LDO 的 3.3V 95% 效率升压转换器，用于单节/双节锂离子电池应用领域

TPS61121是TI德州仪器公司的一款转换器（集成开关）产品，TPS61121是具有 1.5V 200mA LDO 的 3.3V 95% 效率升压转换器，用于单节/双节锂离子电池应用领域，本站介绍了TPS61121的封装应用图解、特点和优点、功能等，并给出了与TPS61121相关的TI元器件型号供参考。

TPS61121 - 具有 1.5V 200mA LDO 的 3.3V 95% 效率升压转换器，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, 95% Efficient, Boost Converter With 500-mA Output Current From 1.8-V Input
Integrated 200-mA Reverse Voltage Protected LDO for DC-DC Output Voltage Post Regulation or Second Output Voltage
40-µA (Typical) Total Device 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 or Dual Cell Battery or USB Powered Products as MP-3 Player, PDAs, and Other Portable Equipment
Dual Input or Dual Output Mode
Simple Li-Ion to 3.3-V Conversion

Typical Application Schematic

产品说明

The TPS6112x devices provide a complete power supply solution for products powered by either a one-cell Li-Ion or Li-Polymer by either a one-cell Li-Ion or Li-Polymer battery, or a two- to four-cell Alkaline, NiCd, or NiMH battery. The devices can generate two stable output voltages that are either adjusted by an external resistor divider or are fixed internally on the chip. The device also provides a simple solution for generating 3.3 V out of a one-cell Li-Ion or Li-Polymer battery at a maximum output current of at least 200 mA with supply voltages down to 1.8 V. The implemented boost 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 boost 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 discontinuous conduction mode. A power good output at the boost stage simplifies 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 boost output or directly from the battery. The LDO can be enabled separately that is, using the power good of the boost stage. The device is packaged in a 16-pin VQFN (RSA) package measuring 4 mm x 4 mm or in a 16-pin TSSOP (PW) package.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS61120	TSSOP (16)	5.00 mm × 4.40 mm
TPS61120	VQFN (16)	4.00 mm × 4.00 mm
TPS61121	TSSOP (16)	5.00 mm × 4.40 mm
TPS61122	TSSOP (16)	5.00 mm × 4.40 mm

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