TI LM10504三路固态驱动器电源管理解决方案

TI公司的LM10504是三路降压加LDO线性电源的电源管理单源,三路降压稳压器可编程配置,效率高达95%,反馈电压精度±3%,2MHz开关频率,通过SPI接口可编程输出电压,具有过压保护和欠压锁住,带开机重起的自动软起动,主要用在固态驱动器.本文介绍了LM10504主要指标和特性,方框图, 典型应用框图以及评估板与固态驱动器解决方案框图.

The LM10504 is an advanced PMU containing three configurable, high-efficiency buck regulators for supplying variable voltages. The device is ideal for supporting ASIC and SOC designs for Solid-State and Flash drives.

The LM10504 operates cooperatively with ASIC to optimize the supply voltage for low-power conditions and Power Saving modes via the SPI interface. It also supports a 250 mA LDO and a programmable Interrupt Comparator.

LM10504主要指标:

Programmable Buck Regulators:

Buck 1: 1.1V to 3.6V; 1.6A

Buck 2: 1.1V to 3.6V; 1A

Buck 3: 0.7V to 1.335V; 1A

±3% feedback voltage accuracy

Up to 95% efficient buck regulators

2MHz switching frequency for smaller inductor size

2.8 × 2.8 mm, 0.4 mm pitch 34-bump micro SMD package

LM10504主要特性:

Three highly efficient programmable buck regulators

Integrated FETs with low RDSON

Bucks operate with their phases shifted to reduce the

input current ripple and capacitor size

Programmable Output Voltage via the SPI interface

Overvoltage and Undervoltage Lockout

Automatic internal soft start with Power-on reset

Current overload and thermal shutdown protection

PFM mode for low-load, high-efficiency operation

Power-down data protection enhances data integrity

Bypass mode available on Bucks 1 and 2

Deep sleep mode to save power during idle times

DEVSLP function

Low-dropout LDO 3.0V, 250 mA

SPI-programmable interrupt comparator (2.0V to 4.0V)

Alternate Buck VOUTS selectable via VSELECT logic pins

Customizable startup sequencing to support varied

controller IC requirements

RESET pin

LM10504应用:

Solid-State Drives


图1. LM10504 PMIC方框图

图2. LM10504 PMIC降压功能框图

图3. LM10504 PMIC典型应用框图

图4. LM10504 PMIC评估板外形图

图5. LM10504固态驱动器解决方案框图
详情请见:
http://www.ti.com/lit/ds/snvs739/snvs739.pdf