SLUSFD2B
September 2023 – March 2024
TPSM861252
,
TPSM861253
,
TPSM861257
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Family Devices
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
PWM Operation and D-CAP3™ Control Mode
7.3.2
Eco-mode Control
7.3.3
Soft Start and Prebiased Soft Start
7.3.4
Overvoltage Protection
7.3.5
Frequency
7.3.6
Large Duty Operation
7.3.7
Current Protection and Undervoltage Protection
7.3.8
Undervoltage Lockout (UVLO) Protection
7.3.9
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Eco-mode Operation
7.4.2
FCCM Mode Operation
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
Custom Design with WEBENCH® Tools
8.2.2.2
Output Voltage Resistors Selection
8.2.2.3
Output Filter Selection
8.2.2.4
Input Capacitor Selection
8.2.2.5
Enable Circuit
8.2.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Device Support
9.1.1
Development Support
9.1.1.1
Custom Design with WEBENCH® Tools
9.2
Receiving Notification of Documentation Updates
9.3
Support Resources
9.4
Trademarks
9.5
Electrostatic Discharge Caution
9.6
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RDX|7
MPQF721
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slusfd2b_oa
1
Features
Configured for a wide range of applications
3V to 17V wide input voltage range
Fixed 3.3V output for TPSM861253
0.6V to 10V output range for TPSM861252
0.6V to 5.5V output range for TPSM861257
0.6V reference voltage
±1% for 0.6Vref accuracy at 25°C
±1.5% for 0.6Vref accuracy at –40°C to 125°C
±1% for 3.3Vout accuracy from 0 to 65°C
Integrated 55mΩ and 24mΩ MOSFETs
100μA low quiescent current for TPSM861252
1.4MHz switching frequency
Maximum 95% large duty cycle operation
1.2V precision EN threshold voltage
1.6ms fixed typical soft-start time
Ease of use and small design size
TPSM861252 Eco-mode, TPSM861253/7 FCCM mode at light load
Fast transient
D-CAP3™
control mode
Easy layout with integrated inductor and bootstrap capacitor
Support start-up with prebiased output voltage
Open-drain power-good indicator
Non-latch for OV, OT, and UVLO protection
Hiccup mode in UV protection
Cycle-by-cycle OC and NOC protection
–40°C to 125°C operating junction temperature
3.3mm × 4mm × 2mm QFN package
Create a custom design using the TPSM86125x with the
WEBENCH® Power Designer