LMR23630 Synchronous Step-Down Converter

Specifications

Product Overview

The LMR23630 is a Texas Instruments synchronous step-down converter in the Power_Management category. It operates from a recommended 4 to 36 V input range and regulates outputs from 1 to 28 V with up to 3 A maximum recommended continuous output current. Its architecture uses peak-current-mode control, integrated synchronous rectification, and internal compensation.

The converter has a default fixed switching frequency of 400 kHz, with the WSON RT option using a floating RT pin for that default. It supports external clock synchronization through the EN/SYNC pin using a positive pulse coupled through a small capacitor. The same pin provides precision enable control, where High turns the device on and Low turns it off.

Package options include an 8-pin HSOIC measuring 4.89 mm x 3.90 mm and a 12-pin WSON measuring 3.00 mm x 3.00 mm. Assembly-related external components include a 100 nF or 470 nF BOOT capacitor from BOOT to SW, a 2.2 µF 16 V VCC bypass capacitor from VCC to AGND, and a 10 kΩ to 100 kΩ PGOOD pullup to a rail no higher than 12 V.

Key Features

• 4 to 36 V recommended input voltage range
• 3 A maximum recommended continuous output current
• 1 to 28 V recommended output voltage range
• 400 kHz default fixed switching frequency
• 60 ns minimum switch on-time specification
• 75 µA quiescent current in no-load PFM option
• 2 µA shutdown current in shutdown mode
• Peak-current-mode control with internal compensation
• Integrated synchronous rectification for step-down conversion
• PFM and forced PWM light-load mode options
• EN/SYNC pin supports enable and external synchronization
• Cycle-by-cycle current limit and hiccup short-circuit protection

Typical Applications

• Step-down regulated power rails
• 4 to 36 V input systems
• Up to 3 A output rails
• 1 to 28 V output conversion
• PFM light-load power designs
• Forced PWM switching designs
• Externally synchronized regulator systems
• Prebiased-load startup rails
• PGOOD-monitored power sequencing

Procurement Notes

When requesting a quote for LMR23630, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.

If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.

For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.