TPS65055 - 具有 4 个低输入电压 LDO 的 2.25MHz 双路降压转换器

TPS65055是TI德州仪器公司的一款无产品，TPS65055是具有 4 个低输入电压 LDO 的 2.25MHz 双路降压转换器，本站介绍了TPS65055的封装应用图解、特点和优点、功能等，并给出了与TPS65055相关的TI元器件型号供参考。

TPS65055 - 具有 4 个低输入电压 LDO 的 2.25MHz 双路降压转换器 - 无 - 电源管理多通道IC(PMIC)解决方案 - 德州仪器

产品特性

Up to 95% Efficiency
Output Current for DCDC Converters 2 × 0.6 A
Two Selectable Fixed Output Voltages 1 V and 1.2 V for DCDC2
VIN Range for DCDC Converters From 2.5 V to 6 V
2.25-MHz Fixed-Frequency Operation
Power Save Mode at Light Load Current
180° Out-of-Phase Operation
Output Voltage Accuracy in PWM Mode ±1%
Low Ripple PFM Mode
Total Typical 32-μA Quiescent Current for Both DC-DC Converters
100% Duty Cycle for Lowest Dropout
2 General-Purpose 400 mA High PSRR LDOs
2 General-Purpose 200 mA High PSRR LDOs
VIN Range for LDOs From 1.5 V to 6.5 V
Digital Voltage Selection for the LDOs
I2C Compatible Interface
Available in a 4 mm × 4 mm 32-Pin QFN Package

产品应用

Cell Phones, Smart Phones
WLAN
PDAs, Pocket PCs
OMAP™ and Low Power DSP Supplies
XScale
Portable Media Players
Digital Cameras

产品说明

The TPS65055 device is an integrated Power Management IC for applications powered by one Li-Ion or Li-Polymer cell, which require multiple power rails.

The TPS65055 provides two highly efficient, 2.25 MHz step-down converters targeted at providing the core voltage and I/O voltage in a processor-based system. Both step-down converters enter a low power mode at light load for maximum efficiency across the widest possible range of load currents.

For low noise applications the device can be forced into fixed frequency PWM mode using the I2C compatible interface. In shutdown mode, current consumption is reduced to less than 1 μA.

The device allows the use of small inductors and capacitors to achieve a small solution size.

The TPS65055 provides an output current of up to 0.6 A on each DC-DC converter.

The TPS65055 also integrates two 400-mA LDO and two 200-mA LDO voltage regulators, which can be turned on/off using separate enable pins on each LDO. Each LDO operates with an input voltage range from 1.5 V to 6.5 V allowing them to be supplied from one of the step-down converters or directly from the main battery. Two digital input pins are used to set the output voltage of the LDOs from a set of 9 different combinations for LDO1 to LDO4. Additionally, the converters can be controlled by an I2C compatible interface.

The TPS65055 is available in a small 32-pin leadless package (4 mm × 4 mm QFN) with a 0.4-mm pitch.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS65055	VQFN (32)	4.00 mm × 4.00 mm

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