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TPS7B4255-Q1 Automotive, 70-mA, 40-V, Voltage-Tracking LDO With 5-mV Tracking Tolerance
SBVS392A
June 2022 – August 2023
TPS7B4255-Q1
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TPS7B4255-Q1 Automotive, 70-mA, 40-V, Voltage-Tracking LDO With 5-mV Tracking Tolerance
1
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
Timing Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Tracker Output Voltage (VOUT)
7.3.1.1
Output Voltage Equal to the Reference Voltage
7.3.1.2
Output Voltage Less Than the Reference Voltage
7.3.2
Reverse Current Protection
7.3.3
Undervoltage Lockout
7.3.4
Thermal Protection
7.3.5
Current Limit
7.3.6
Output Short to Battery
7.3.7
Tracking Regulator With an Enable Circuit
7.4
Device Functional Modes
7.4.1
Normal Operation
7.4.2
Dropout Operation
7.4.3
Operation With VIN < 3 V
7.4.4
Disable With ADJ/EN Control
8
Application and Implementation
8.1
Application Information
8.1.1
Dropout Voltage
8.1.2
Reverse Current
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Input and Output Capacitor Selection
8.2.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.1.1
Package Mounting
8.4.1.2
Board Layout Recommendations to Improve PSRR and Noise Performance
8.4.1.3
Power Dissipation and Thermal Considerations
8.4.1.4
Thermal Performance Versus Copper Area
8.4.2
Layout Examples
9
Device and Documentation Support
9.1
Device Support
9.1.1
Device Nomenclature
9.2
Receiving Notification of Documentation Updates
9.3
Support Resources
9.4
Trademarks
9.5
Electrostatic Discharge Caution
9.6
Glossary
10
Mechanical, Packaging, and Orderable Information
10.1
Mechanical Data
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DYB|5
MPSS134
DBV|5
MPDS018T
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbvs392a_oa
sbvs392a_pm
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Data Sheet
TPS7B4255-Q1
Automotive, 70-mA, 40-V, Voltage-Tracking LDO With 5-mV Tracking Tolerance
1
Features
AEC-Q100 qualified for automotive applications:
Temperature grade 1: –40°C to +125°C, T
A
Junction temperature: –40°C to +150°C, T
J
Wide input operating voltage range (3 V to 40 V):
Absolute maximum input voltage range:
–40 V to +45 V
Wide output voltage range: 2 V to 40 V
Maximum output current: 70 mA
Very-tight, output-tracking tolerance: 5 mV (max)
Low dropout voltage: 500 mV (max) at 70 mA
Combined reference and enable functionalities
Low quiescent current at light load: 35 μA
Wide C
OUT
and ESR range:
Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESR
Integrated protection features:
Reverse current protection
Reverse polarity protection
Overtemperature protection
Protection against output short-circuit to ground and supply
Available in two 5-pin SOT-23 packages:
Standard SOT-23 (DBV)
Thermally enhanced SOT-23 (DYB)
2
Applications
Powertrain pressure sensors
Powertrain temperature sensors
Powertrain exhaust sensors
Powertrain fluid concentration sensors
Body control modules (BCM)