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LMR23630FDRRR

36V, 3A synchronous step-down converter with 4V-36V input range and 75µA quiescent current in 3x3mm VQFN package

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Manufacturer Part：

LMR23630FDRRR

Package：

12-VQFN (3.00 x 3.00 mm) Wettable Flank

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Description

Product Overview

The LMR23630FDRRR from Texas Instruments is a SIMPLE SWITCHER® 36V, 3A synchronous step-down converter in a 12-pin VQFN (3x3mm) package. It features a wide input voltage range of 4V to 36V and adjustable output from 1V to 28V, making it ideal for industrial power conditioning from unregulated sources. The device employs peak current-mode control with internal loop compensation for ease of use.

Key Specifications

Input Voltage Range 4V ~ 36V
Output Voltage Range 1V ~ 28V (Adjustable)
Output Current 3A (Continuous)
Switching Frequency 400kHz / 2.1MHz (Selectable)
Quiescent Current 75µA (PFM Mode, No Load)
Shutdown Current 2µA (Typical)
Min On-Time 60ns
Package 12-VQFN (3x3mm) Wettable Flank
Operating Temperature -40°C ~ +125°C

Features

  • Integrated synchronous rectification for high efficiency (>92%)
  • Internal compensation minimizes external components
  • PFM and forced PWM mode options
  • Frequency synchronization to external clock
  • Precision enable input for power sequencing
  • Cycle-by-cycle current limit with hiccup-mode short-circuit protection
  • Thermal shutdown protection
  • Soft start into prebiased load

Applications

  • Factory and building automation: PLC, HVAC, elevator control
  • Asset tracking systems
  • General purpose wide VIN regulation
  • Battery-powered industrial equipment
  • Distributed power architectures

The LMR23630 SIMPLE SWITCHER® is an easy-to-use 36V, 3A synchronous step-down regulator with a wide input range from 4V to 36V, suitable for various industrial applications for power conditioning from unregulated sources. Peak current-mode control is employed to achieve simple control-loop compensation and cycle-by-cycle current limiting. A quiescent current of 75µA makes the device suitable for battery-powered systems. An ultra-low 2µA shutdown current can further prolong battery life. Internal loop compensation eliminates the tedious task of loop compensation design and minimizes external components. The device has an option for constant frequency FPWM mode to achieve small output-voltage ripple at light load.

The LMR23630 employs peak current-mode control architecture. The error amplifier compares the feedback voltage (FB pin) with an internal reference and drives the COMP node. The COMP voltage sets the peak current threshold for the high-side MOSFET. When the high-side switch current reaches the threshold, it turns off and the low-side synchronous MOSFET turns on. In PFM mode, the device reduces switching frequency at light loads to maintain efficiency. The internal oscillator generates the switching clock at 400kHz or 2.1MHz based on the RT pin configuration. Protection circuits include cycle-by-cycle current limit, hiccup-mode output short protection, and thermal shutdown.

Pin Name Function
1 BOOT Bootstrap capacitor connection for high-side gate driver
2 VIN Input supply voltage (4V-36V)
3 EN/SYNC Enable and frequency synchronization input
4 RT Switching frequency selection pin
5 FB Feedback input from output voltage divider
6 AGND Analog ground
7 PGOOD Power-good open-drain output
8-9 PGND Power ground
10-11 SW Switch node connection to output inductor
12 VCC Internal LDO output, bypass with capacitor
  • Industrial PLC Power Supply: Provides 5V/3.3V rail from 24V industrial bus with >92% efficiency and hiccup short-circuit protection
  • Battery-Powered Asset Tracker: 75µA no-load quiescent current extends battery life in always-on tracking devices
  • Building Automation HVAC: Wide 4V-36V input accommodates battery backup and unregulated adapter supplies
  • Elevator Control System: Robust 36V input rating with integrated protection for harsh electrical environments
Model Manufacturer Key Difference
LMR23625FDRRR TI 2.5A version, pin-to-pin compatible
LMR23610FDRRR TI 1A version, pin-to-pin compatible
LMR16030PDDAR TI 60V input, 3A, HSOIC-8 package
TPS54331DDAR TI 3.5V-28V input, 3A, HSOIC-8
MP8759GD-Z MPS 18V, 5A, QFN-12 (3x3mm)
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Email: info@materialparts.com

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Service & Packaging

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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