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TPS7B4250-Q1 Datasheet Preview

TPS7B4250-Q1 Datasheet

50-mA 40-V Voltage-Tracking LDO

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TPS7B4250-Q1
SLVSCA0C – OCTOBER 2013 – REVISED SEPTEMBER 2016
TPS7B4250-Q1 50-mA 40-V Voltage-Tracking LDO With 5-mV Tracking Tolerance
1 Features
1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level 3A
– Device CDM ESD Classification Level C6
• –20-V to 45-V Wide, Maximum Input Voltage
Range
• Output Current, 50 mA
• Very-Low Output-Tracking Tolerance,
5 mV (max)
• 150-mV Low Dropout Voltage When
IOUT = 10 mA
• Combined Reference and Enable Input
• 40-µA Low Quiescent Current at Light Load
• Extreme, Wide ESR Range.
– Stable with 1-µF to 50-µF Ceramic Output
Capacitor, ESR 1 mΩ to 20 Ω
• Reverse Polarity Protection
• Overtemperature Protection
• Output Short-Circuit Proof to Ground and Supply
• SOT-23 Package
2 Applications
• Off-board Sensor Supply
• High-Precision Voltage Tracking
3 Description
The TPS7B4250-Q1 device is a monolithic, integrated
low-dropout voltage tracker. The device is available in
a SOT-23 package. The TPS7B4250-Q1 device is
designed to supply off-board sensors in an
automotive environment. The IC has integrated
protection for overload, over temperature, reverse
polarity, and output short-circuit to the battery and
ground.
A reference voltage applied at the adjust-input pin,
ADJ, regulates supply voltages up to VIN = 45 V with
high accuracy and loads up to 50 mA.
By setting the adjust/enable input pin, ADJ/EN, to
low, the TPS7B4250-Q1 device switches to standby
mode which reduces the quiescent current to the
minimum value.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7B4250-Q1
SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Output Equal to Reference Voltage
Output Lower than Reference Voltage
Vbat
VIN TPS7B4250-Q1 VOUT
Vreg
1 µF
2.2 µF
Vbat
VIN TPS7B4250-Q1 VOUT
Vreg
1 µF
2.2 µF
ADJ/EN
Vref
GND
Vref
ADJ/EN
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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TPS7B4250-Q1 Datasheet Preview

TPS7B4250-Q1 Datasheet

50-mA 40-V Voltage-Tracking LDO

No Preview Available !

TPS7B4250-Q1
SLVSCA0C – OCTOBER 2013 – REVISED SEPTEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 11
8 Application and Implementation ........................ 12
8.1 Application Information............................................ 12
8.2 Typical Application ................................................. 12
9 Power Supply Recommendations...................... 13
10 Layout................................................................... 14
10.1 Layout Guidelines ................................................. 14
10.2 Layout Example .................................................... 14
10.3 Power Dissipation and Thermal Considerations ... 15
11 Device and Documentation Support ................. 16
11.1 Device Support...................................................... 16
11.2 Documentation Support ........................................ 16
11.3 Receiving Notification of Documentation Updates 16
11.4 Community Resource............................................ 16
11.5 Trademarks ........................................................... 16
11.6 Electrostatic Discharge Caution ............................ 16
11.7 Glossary ................................................................ 16
12 Mechanical, Packaging, and Orderable
Information ........................................................... 16
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (July 2015) to Revision C
Page
• Changed the title of the data sheet ....................................................................................................................................... 1
• Added the Device Support and Receiving Notification of Documentation Updates sections............................................... 16
Changes from Revision A (November 2013) to Revision B
Page
• Changed HBM ESD Classification level from 2 to 3A ........................................................................................................... 1
• Changed CDM ESD Classification level from C4 to C6 ......................................................................................................... 1
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section ............................... 1
• Deleted the transient current and 107-pF capacitor for HBM table notes from the ESD Ratings table ................................ 5
• Changed input voltage symbol from VIN to VI for the ΔVO(ΔVI) and Vdropout parameters and the output voltage symbol
from VOUT to VO for the IL parameter in the Electrical Characteristics table ........................................................................... 6
• Added IO and CO to the PSRR test condition in the Electrical Characteristics table ............................................................. 6
• Changed the max value for Vdropout where IO = 10 mA from 250 to 265 in the Electrical Characteristics table ..................... 6
• Deleted the VADJ = 5 V condition for the Ground current vs Temperature graph and changed the legend ........................... 7
• Changed the y axis units from mV to mA in the Current-limit vs Temperature graph .......................................................... 7
• Added the VADJ condition statement to the Input Voltage vs Output Voltage graph and changed the y-axis from IO to VO .. 7
• Changed the title of Figure 8 from Input Voltage vs Output Voltage to Reference Voltage vs Output Voltage, and
changed the y-axis from IO to VO. Also added the VI condition statement to the graph......................................................... 7
• Changed the second y axis from IO to VI and removed the units in the Line Transient ......................................................... 7
• Deleted the units from the second y axis in the Load Transient ............................................................................................ 7
• Added the VADJ condition statement to the Power-supply Rejection Ratio vs Frequency graph ........................................... 8
• Added resistor-divider values to the Tracking LDO With Enable Circuit figure.................................................................... 11
2 Submit Documentation Feedback
Copyright © 2013–2016, Texas Instruments Incorporated
Product Folder Links: TPS7B4250-Q1


Part Number TPS7B4250-Q1
Description 50-mA 40-V Voltage-Tracking LDO
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