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R1540 Series

High Noise Immunity 42V Input 70mA Voltage Tracker

  • Consumer
  • Industrial
  • Automotive
  • PLP
  • RoHS

The R1540 is a voltage tracker featuring input voltage in the range of 3.5 V to 42 V. Highly accurate output voltage which attributes to CE/ADJ pin achieves successful sequence control of the integrated off-board sensor module. Strong enough not to require the circuit to avoid external electromagnetic interference (EMI) and this contributes space saving.

This regulator can be used under high temperature environment. It offers the maximum operating temperature of 105°C for consumer applications, and 125°C for industrial and automotive applications.

  • Excellent noise resistance provides effective shielding against EMI.
  • Lower stand-by current consumption leads to energy saving of the whole system to prolong battery life.
  • Response to requirements for sequence control in the system with integrated sensors.

Specs & Datasheets

  Consumer Industrial Automotive
Input Voltage Range 3.5 V to 42.0 V (50.0 V)
Operating Temperature Range -40°C to 105°C (125°C) -40°C to 125°C (150°C) -40°C to 125°C (150°C)
Supply Current Typ. 60 µA
Standby Current Typ. 0.1 µA
Output Voltage Range 2.2 V to 14.0 V
Output Voltage Accuracy ±15 mV (−40°C ≤ Ta ≤ 105°C, VCE/ADJ = 5 V) ±15 mV (−40°C ≤ Ta ≤ 125°C, VCE/ADJ = 5 V) ±15 mV (−40°C ≤ Ta ≤ 125°C, VCE/ADJ = 5 V)
Dropout Voltage Typ. 1.3 V (IOUT = 70 mA)
Output Current 70 mA
Package SOT-23-5, HSOP-8E

Download Datasheet

Protections / Functions

Functional Description

TSD Reverse Current Limit ISC Inrush Constant Slope ECO mode Auto Discharge External Driver

Technical Documents

Typical Application

Typical Application

CIN: 0.1 µF, COUT: 10 µF, Ceramic capacitor

Noise Immunity Demonstration

Introduction Video

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
SOT-23-5 R1540N R1540N-FE
  • gradeConsumerC
  • plpP
HSOP-8E R1540S R1540S-FE
  • gradeIndustrialI
  • plpP
SOT-23-5 R1540N R1540N-YE
  • gradeIndustrialI
  • plpP
HSOP-8E R1540S R1540S-YE
  • gradeAutomotiveA
  • plpP
SOT-23-5 R1540N R1540N-KE
  • gradeAutomotiveA
  • plpP
SOT-23-5 R1540N R1540N-AE
  • gradeAutomotiveA
  • plpP
HSOP-8E R1540S R1540S-KE
  • gradeAutomotiveA
  • plpP
HSOP-8E R1540S R1540S-AE

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

TSD Thermal Shutdown Function
Reverse Current Protection Reverse Current Protection
Current Limit Overcurrent Protection
ISC Short Current Protection
Inrush Current Limit Inrush Current Protection
Constant Slope Constant Slope Function
ECO mode ECO Function
Auto Discharge Auto Discharge Function
External Driver External Output Driver Transistor

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