ZHCSKD2A
November 2019 – February 2021
TPS6521825
PRODUCTION DATA
1
特性
2
应用
3
说明
3.1
Simplified Schematic
4
Revision History
5
Description (continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Wake-Up and Power-Up and Power-Down Sequencing
8.3.1.1
Power-Up Sequencing
8.3.1.2
Power-Down Sequencing
8.3.1.3
Strobe 1 and Strobe 2
8.3.1.4
Supply Voltage Supervisor and Power-Good (PGOOD)
8.3.1.5
Backup Supply Power-Good (PGOOD_BU)
8.3.1.6
Internal LDO (INT_LDO)
8.3.1.7
Current Limited Load Switches
8.3.1.7.1
Load Switch 1 (LS1)
8.3.1.7.2
Load Switch 2 (LS2)
8.3.1.7.3
Load Switch 3 (LS3)
8.3.1.8
LDO1
8.3.1.9
Coin Cell Battery Voltage Acquisition
8.3.1.10
UVLO
8.3.1.11
Power-Fail Comparator
8.3.1.12
Battery-Backup Supply Power-Path
8.3.1.13
DCDC3 and DCDC4 Power-Up Default Selection
8.3.1.14
I/O Configuration
8.3.1.14.1
Configuring GPO2 as Open-Drain Output
8.3.1.14.2
Using GPIO3 as Reset Signal to DCDC1 and DCDC2
8.3.1.15
Push Button Input (PB)
8.3.1.15.1
Signaling PB-Low Event on the nWAKEUP Pin
8.3.1.15.2
Push Button Reset
8.3.1.16
AC_DET Input (AC_DET)
8.3.1.17
Interrupt Pin (INT)
8.3.1.18
I2C Bus Operation
8.4
Device Functional Modes
8.4.1
Modes of Operation
8.4.2
OFF
8.4.3
ACTIVE
8.4.4
SUSPEND
8.4.5
RESET
8.5
Programming
8.5.1
Programming Power-Up Default Values
8.6
Register Maps
9
Application and Implementation
9.1
Application Information
9.1.1
Applications Without Backup Battery
9.1.2
Applications Without Battery Backup Supplies
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Output Filter Design
9.2.2.2
Inductor Selection for Buck Converters
9.2.2.3
Output Capacitor Selection
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Receiving Notification of Documentation Updates
12.3
支持资源
12.4
Trademarks
12.5
静电放电警告
12.6
术语表
13
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RSL|48
MPQF193A
散热焊盘机械数据 (封装 | 引脚)
RSL|48
QFND155N
订购信息
zhcskd2a_oa
zhcskd2a_pm
1
特性
具有集成开关 FET 的 3 个可调节降压转换器(DCDC1、DCDC2 和 DCDC3):
DCDC1:默认电压为
0.85
V,电流高达 1.8A
DCDC2:默认电压为 1.1V,电流高达 1.8A
DCDC3:默认电压为
3.3
V,电流高达 1.8A
输入电压范围:
2.7
V 至 5.5V
可调节输出电压范围:0.85V 至 1.675V(DCDC1 和 DCDC2)
可调节输出电压范围:0.9V 至 3.4V (DCDC3)
轻负载电流状态下进入节能模式
100% 占空比,可实现最低压降
禁用时支持有源输出放电
具有集成开关 FET 的 1 个可调节降压/升压转换器 (DCDC4):
DCDC4:默认电压为
1.8
V,电流高达 1.6A
输入电压范围:
2.7
V 至 5.5V
可调节输出电压范围:1.175V 至 3.4V
禁用时支持有源输出放电
2 个适用于备用电池域的低静态电流、高效降压转换器(DCDC5、DCDC6)
DCDC5:1V 输出电压
DCDC6:1.8V 输出电压
输入电压范围:2.2V 至 5.5V
由系统电源或备用纽扣电池供电
可调节通用 LDO (LDO1)
LDO1:默认电压为 1.8V,电流高达 400mA
输入电压范围:1.8V 至 5.5V
可调节输出电压范围:0.9V 至 3.4V
禁用时支持有源输出放电
具有 350mA 电流限制的低电压负载开关 (LS1)
输入电压范围:1.2V 至 3.6V
电压为 1.35V 时,开关阻抗为 110mΩ(最大值)
具有 100mA 或 500mA 可选电流限制的 5V 负载开关 (LS2)
输入电压范围:
3V
至 5.5V
电压为 5V 时,开关阻抗为 500mΩ(最大值)
具有 100mA 或 500mA 可选电流限制的高电压负载开关 (
LS3
)
输入电压范围:1.8V 至 10V
开关阻抗:500mΩ(最大值)
带有内置监控功能的监控器可用于监测:
DCDC1、DCDC2 ±4% 容差
DCDC3、DCDC4 ±5% 容差
LDO1 ±5% 容差
保护、诊断和控制:
欠压锁定 (UVLO)
常开按钮监视器
过热警告和关断
备用电源和主电源采用独立的电源正常状态输出
I
2
C 接口(地址 0x24)(请参阅 400kHz 时的 I
2
C 操作
时序要求
)