SNVSAZ4A
February 2021 – March 2021
TPS541620
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and 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
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Fixed-Frequency, Internally Compensated Advanced-Current-Mode Control
7.3.2
Enable and UVLO
7.3.3
Internal LDO
7.3.4
Pre-biased Output Start-up
7.3.5
Current Sharing
7.3.6
Frequency Selection and Minimum On-Time and Off-Time
7.3.7
Ramp Compensation Selection
7.3.8
Soft Start
7.3.9
Remote Sense Function
7.3.10
Adjustable Output Voltage
7.3.11
Power Good
7.3.12
Overcurrent Protection
7.3.13
Overvoltage and Undervoltage Protection
7.3.14
Overtemperature Protection
7.3.15
Frequency Synchronization
7.4
Device Functional Modes
7.4.1
Operation Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Application - Dual Independent Outputs
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Switching Frequency
8.2.2.2
Output Inductor Selection
8.2.2.3
Output Capacitor
8.2.2.4
Input Capacitor
8.2.2.5
Output Voltage Resistors Selection
8.2.2.6
Adjustable Undervoltage Lockout
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
BP5 Capacitor Selection
8.2.2.9
PGOOD Pullup Resistor
8.2.2.10
Current Limit
8.2.2.11
Soft-Start Time Selection
8.2.2.12
MODE1 and MODE2 Pins
8.2.3
Application Curves
8.2.4
Typical Application - 2-Phase Operation
8.2.4.1
Design Requirements
8.2.4.2
Detailed Design Procedure
8.2.4.2.1
Switching Frequency
8.2.4.2.2
Output Inductor Selection
8.2.4.2.3
Output Capacitor
8.2.4.2.4
Input Capacitor
8.2.4.2.5
Output Voltage Resistors Selection
8.2.4.2.6
Adjustable Undervoltage Lockout
8.2.4.2.7
Bootstrap Capacitor Selection
8.2.4.2.8
BP5 Capacitor Selection
8.2.4.2.9
PGOOD Pullup Resistor
8.2.4.2.10
Current Limit
8.2.4.2.11
Soft-Start Time Selection
8.2.4.2.12
MODE1 Pin
8.2.4.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.2.1
Thermal Performance
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.2
Receiving Notification of Documentation Updates
11.3
Support Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RPB|25
MPQF519
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvsaz4a_oa
snvsaz4a_pm
1
Features
Integrated 24-mΩ and 10-mΩ MOSFETs with lossless current sensing
Fixed-frequency, internally-compensated advanced current mode (ACM) control
Dual output with up to 6 A each output
Dual-phase, single output for up to 12 A
Phase interleaving operation for one or two phases
Synchronization to an external clock using SYNC and CLKO
0.5-V to 5.5-V output voltage range
Four selectable PWM ramp options for each switching frequency to optimize control loop performance
Soft start time is configurable by an external cap in single-output, multi-phase configuration and is fixed at 1 ms for dual-output configuration
True differential remote sensing in multi-phase operation
Independent enable and power good
Four selectable switching frequency options of 500 kHz, 1 MHz, 1.5 MHz, and 2.0 MHz
Supports safe pre-biased start-up
Overtemperature protection with hysteresis
–40°C to 150°C operation junction temperature
3-mm × 5-mm, 25-pin VQFN-HR package with 0.5-mm pitch