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TPS74901 3A, Low Dropout Linear Regulator With Programmable Soft-Start
SBVS082K
June 2007 – June 2024
TPS74901
PRODUCTION DATA
CONTENTS
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TPS74901 3A, Low Dropout Linear Regulator With Programmable Soft-Start
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics: IOUT = 50mA
5.7
Typical Characteristics: IOUT = 1 A
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagrams
6.3
Feature Description
6.3.1
Enable and Shutdown
6.3.2
Power-Good
6.3.3
Internal Current Limit
6.3.4
Thermal Protection
6.4
Device Functional Modes
6.4.1
Normal Operation
6.4.2
Dropout Operation
6.4.3
Disabled
7
Application and Implementation
7.1
Application Information
7.1.1
Input, Output, and BIAS Capacitor Requirements
7.1.2
Transient Response
7.1.3
Dropout Voltage
7.1.4
Output Noise
7.1.5
Programmable Soft-Start
7.1.6
Sequencing Requirements
7.2
Typical Application
7.2.1
Design Requirements
7.2.2
Detailed Design Procedure
7.2.3
Application Curves
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.1.1
Power Dissipation
7.4.1.2
Thermal Considerations
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Device Support
8.1.1
Device Nomenclature
8.1.2
Development Support
8.1.2.1
Evaluation Modules
8.1.2.2
Spice Models
8.2
Documentation Support
8.2.1
Related Documentation
8.3
Receiving Notification of Documentation Updates
8.4
Support Resources
8.5
Trademarks
8.6
Electrostatic Discharge Caution
8.7
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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Data Sheet
TPS74901 3A, Low Dropout Linear Regulator With Programmable Soft-Start
1
Features
V
OUT
range: 0.8V to 3.6V
Ultra-low V
IN
range: 0.8V to 5.5V
V
BIAS
range: 2.7V to 5.5V
Low dropout: 120mV (typical) at 3A
Power-good (PG) output allows supply monitoring or provides a sequencing signal for other supplies
Accuracy over line, load, and temperature: 1% (new chip)
Accuracy over line, load, and temperature: 2% (legacy chip)
Adjustable start-up in-rush control
V
BIAS
permits low V
IN
operation with good transient response
Stable with any output capacitor ≥ 2.2µF
Packages:
Small, 3mm × 3mm × 1mm VSON
5mm × 5mm × 1mm VQFN and DDPAK-7
Active high enable
2
Applications
Network attached storage - enterprise
Rack servers
Network interface cards (NIC)
Merchant network and server PSU
Typical Application Circuit (Adjustable)
Turn-On Response