原标题：TI TPS7H1101-SP 1.5V至7V超低压降稳压器电源参考设计方案

　　TI公司的TPS7H1101-SP是一款采用PMOS工艺元件配置的超低压降线性稳压电源器件。该器件具有较宽的电压输入范围(1.5V至7V)，同时提供优质的电源电压抑制比(PSRR)。该芯片最主要的特性是通过可编程反馈电流限制使芯片具有较宽的输出调节范围，同时提供很高的精确输出。该芯片主要用于为FPGA、DSP、MCU等具有复杂电源要求的芯片提供电能。本文首先介绍芯片的简介、特性、内部框图及应用领域，并给出相应设计方案的设计原理图、元器件列表及PCB元件布局图。

　　The TPS7H1x01 is a low dropout (LDO) linear regulator that uses a PMOS pass element configuration. It operates under wide range of input voltage, from 1.5 V to 7V while offering excellent PSRR. The TPS7H1x01 features a precise and programmable fold back current limit implementation with a very wide adjustment range. To support complex power requirements of FPGAs, DSPs, or Microcontrollers the TPS7H1x01 provides enable on/off functionality, programmable SoftStart, current sharing capability, and a PowerGood open drain output. The TPS7H1x01 is available in a thermally enhanced16-pin ceramic flatpack package (CFP) .

　　TPS7H1101-SP主要特性：

　　Current Share/Parallel Operation to Provide Higher

　　Output Current

　　Wide VIN Range: 1.5 V – 7 V

　　TPS7H1101-SP:

　　Total Dose (TID) Tolerance > 100kRAD(Si)

　　Single Event Latchup (SEL) Immune to

　　LET = 85MeV-cm2/mg

　　SEB and SERG Immune to

　　LET = 85MeV-cm2/mg

　　SET/SEFI Onset Threshold

　　is = 40MeV-cm2/mg

　　SET/SEFI Cross-Section Plot,

　　See Radiation Report

　　Stable With Ceramic Output Capacitor

　　±2.0 % Accuracy over Line,

　　Load and Temperature (TPS7H1101-SP)

　　±4.2 % Accuracy over Line,

　　Load and Temperature (TPS7H1201-HT)

　　Programmable SoftStart

　　PowerGood Output

　　Low Dropout Voltage

　　TPS7H1201-HT

　　100 mV (MAX) at 0.5 A (210°C)

　　TPS7H1101-SP

　　75 mV at 1 A (25°C)

　　210 mV at 3 A (25°C)

　　335 mV (MAX) at 3A (125°C)

　　Low Noise

　　TPS7H1201-HT

　　(17 x VOUT) µV RMS

　　TPS7H1101-SP

　　(27 x VOUT) µV RMS

　　PSRR: Over 45 dB at 1 kHz

　　Load/Line Transient Response

　　Fold-Back Current Limit (TPS7H1101-SP)

　　16-Pin Ceramic Flatpack Package (HKS/HKR)

　　TPS7H1101-SP应用：

　　TPS7H1101-SP: Rad Tolerant Applications

　　RF 5-V Components VCOs, Receivers, ADCs, Amplifiers

　　Clock Distribution

　　Clean Analog Supply Requirements

　　Supports Harsh Environment Applications

　　TPS7H1201-HT Available in Extreme (–55°C to 210°C) Temperature Range

　　TPS7H1101-SP Available in Military (–55°C to 125°C) Temperature Range

　　TPS7H1201-HT: Texas Instruments’ high temperature products utilize highly optimized silicon (die) solutions with design and process enhancements to maximize performance over extended temperatures.

　　Engineering Evaluation (/EM) Samples are Available

　　图1. TPS7H1101-SP内部方框图

　　TPS7H1101-SP方案介绍：

　　This user’s guide describes the characteristics, operation, and use of the TPS7H1101SP evaluation module (EVM). This EVM demonstrates the Texas Instruments TPS7H1101SP ultra-low Dropout LDO regulator. It is rated for 3-A ultra low-dropout (LDO) voltage regulator. This user’s guide includes setup instructions, a schematic diagram, a bill of materials (BOM), and PCB layout drawings for the EVM.

　　TPS7H1101-SP方案材料清单：