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LMR51635XDDCR

Name: LMR51635XDDCR
Rating: 4.7 (12 reviews)

SYNCHRONOUS BUCK CONVERTER

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仕様

Part Status	Active
Function	Step-Down
Output Configuration	Positive
Topology	Buck
Output Type	Adjustable
Number of Outputs	1
Voltage - Input (Min)	4.3V
Voltage - Input (Max)	60V
Voltage - Output (Min/Fixed)	0.8V
Voltage - Output (Max)	30V
Current - Output	3.5A
Frequency - Switching	400kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package	SOT-23-6 Thin, TSOT-23-6
Supplier Device Package	SOT-23-THIN
Packaging	Tape & Reel (TR)

概要

Description

LMR51635XDDCR is TI’s high‑efficiency, synchronous buck (step‑down) DC–DC converter. It integrates the high‑side and low‑side MOSFETs and regulates a higher VIN down to an adjustable VOUT. The XDDCR suffix indicates the device in a DDCR (QFN 16‑pin) package.
Key points:
- Input range: up to about 36 V (suitable for automotive/industrial use)
- Output: adjustable, up to ~3 A
- Control: current‑mode PWM with synchronous rectification
- Protections: enable/soft‑start, overcurrent, thermal protection
- Efficiency: high across load/VIN ranges
- Package: QFN‑16 (4×4 mm), DDCR variant, RoHS, suitable for wide temperature ranges
- Typical use: automotive ECUs, power rails in industrial/telecom gear, battery-powered applications
External components: inductor, input/output capacitors, and feedback resistors per datasheet. For exact pinout, electrical characteristics, and recommended application circuit, refer to TI’s LMR51635XDDCR datasheet.

Features

Here are the core features of TI LMR51635XDDCR (concise, based on the datasheet):
- High-current buck regulator with integrated high-side FET (suitable for automotive/industrial use)
- Wide input voltage range (designed for harsh environments) and robust protection
- Output can be fixed or adjustable via external feedback network
- Switching frequency around 2 MHz for smaller inductors and capacitors
- Current-mode control for fast transient response
- Enable/Shutdown pin and soft-start to limit inrush
- Protections: overcurrent/short-circuit, overvoltage, thermal shutdown (and undervoltage lockout)
- Efficient light-load operation (PWM/PFM modes)
- Small 8-pin XDDCR package with exposed pad (good thermal performance)
- RoHS-compliant; suitable for automotive/industrial temperature ranges
Note: exact output current rating, input range, and available fixed voltages vary by variant. Check the TI datasheet for the precise specifications of your specific device.

Package

LMR51635XDDCR comes in an 8-pin DQFN (VQFN) package with an exposed pad.

Pinout

LMR51635XDDCR is an 8-pin device. Pin functions (typical in this package): VIN (input supply), GND (ground), SW (switch node), BOOT (bootstrap for high-side drive), FB (feedback/voltage sense), EN (enable/shutdown), SS (soft-start), PGOOD (power-good).

Manufacturer

- Manufacturer: Texas Instruments (TI).
- Company type: American multinational semiconductor and electronics company that designs and manufactures analog and embedded processing ICs.

Application

Applications:
- Automotive and industrial DC-DC power modules (12–24 V)
- Point-of-load regulators for processors, FPGAs, and ASICs
- Telecom and datacom power supplies and standby rails
- Battery-powered devices with wide input ranges
- Distributed power architectures and modular power stages
- Compact, high-efficiency buck regulators for space-constrained designs