SNVSBP2
February 2020
LP8758-E3
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
Efficiency vs Output Current
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
I2C Serial Bus Timing Requirements
6.7
Switching Characteristics
6.8
Typical Characteristics
7
Detailed Description
7.1
Overview
7.1.1
Buck Information
7.1.1.1
Operating Modes
7.1.1.2
Programmability
7.1.1.3
Features
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Overview
7.3.1.1
Transition between PWM and PFM Modes
7.3.1.2
Buck Converter Load Current Measurement
7.3.1.3
Spread-Spectrum Mode
7.3.2
Power-Up
7.3.3
Regulator Control
7.3.3.1
Enabling and Disabling
7.3.3.2
Changing Output Voltage
7.3.4
Device Reset Scenarios
7.3.5
Diagnosis and Protection Features
7.3.5.1
Warnings for Diagnosis (Interrupt)
7.3.5.1.1
Output Current Limit
7.3.5.1.2
Thermal Warning
7.3.5.2
Protection (Regulator Disable)
7.3.5.2.1
Short-Circuit and Overload Protection
7.3.5.2.2
Thermal Shutdown
7.3.5.3
Fault (Power Down)
7.3.5.3.1
Undervoltage Lockout
7.3.6
Digital Signal Filtering
7.4
Device Functional Modes
7.4.1
Modes of Operation
7.5
Programming
7.5.1
I2C-Compatible Interface
7.5.1.1
Data Validity
7.5.1.2
Start and Stop Conditions
7.5.1.3
Transferring Data
7.5.1.4
I2C-Compatible Chip Address
7.5.1.5
Auto Increment Feature
7.6
Register Maps
7.6.1
Register Descriptions
7.6.1.1
OTP_REV
7.6.1.2
BUCK0_CTRL1
7.6.1.3
BUCK0_CTRL2
7.6.1.4
BUCK1_CTRL1
7.6.1.5
BUCK1_CTRL2
7.6.1.6
BUCK2_CTRL1
7.6.1.7
BUCK2_CTRL2
7.6.1.8
BUCK3_CTRL1
7.6.1.9
BUCK3_CTRL2
7.6.1.10
BUCK0_VOUT
7.6.1.11
BUCK0_FLOOR_VOUT
7.6.1.12
BUCK1_VOUT
7.6.1.13
BUCK1_FLOOR_VOUT
7.6.1.14
BUCK2_VOUT
7.6.1.15
BUCK2_FLOOR_VOUT
7.6.1.16
BUCK3_VOUT
7.6.1.17
BUCK3_FLOOR_VOUT
7.6.1.18
BUCK0_DELAY
7.6.1.19
BUCK1_DELAY
7.6.1.20
BUCK2_DELAY
7.6.1.21
BUCK3_DELAY
7.6.1.22
RESET
7.6.1.23
CONFIG
7.6.1.24
INT_TOP
7.6.1.25
INT_BUCK_0_1
7.6.1.26
INT_BUCK_2_3
7.6.1.27
TOP_STAT
7.6.1.28
BUCK_0_1_STAT
7.6.1.29
BUCK_2_3_STAT
7.6.1.30
TOP_MASK
7.6.1.31
BUCK_0_1_MASK
7.6.1.32
BUCK_2_3_MASK
7.6.1.33
SEL_I_LOAD
7.6.1.34
I_LOAD_2
7.6.1.35
I_LOAD_1
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Application Components
8.2.2.1.1
Inductor Selection
8.2.2.1.2
Input Capacitor Selection
8.2.2.1.3
Output Capacitor Selection
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Receiving Notification of Documentation Updates
11.4
Community Resources
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
Glossary
12
Mechanical, Packaging, and Orderable Information
パッケージ・オプション
メカニカル・データ(パッケージ|ピン)
YFF|35
MXBG315
サーマルパッド・メカニカル・データ
発注情報
snvsbp2_oa
snvsbp2_pm
1
Features
Fully Integrated Quad Buck, up to 4-A Programmable Maximum Output Current Per Buck
Auto PWM-PFM and Forced-PWM Operations
Programmable Output Voltage Slew Rate From 30 mV/µs to 0.5 mV/µs
Input Voltage Range: 2.5 V to 5.5 V
V
OUT
Range: 0.5 V to 3.36 V with DVS
Programmable Start-Up and Shutdown Sequencing With Enable Signal
I
2
C-Compatible Interface That Supports Standard (100 kHz), Fast (400 kHz),
Fast+ (1 MHz), and High-Speed (3.4 MHz) Modes
Interrupt Function with Programmable Masking
Load Current Measurement
Output Short-Circuit and Overload Protection
Spread-Spectrum Mode for EMI Reduction
The Four Buck Cores Operate 90° out of Phase Thereby Reducing Input Ripple Current
Overtemperature Warning and Protection
Undervoltage Lockout (UVLO)