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LM5009SDC

Name: LM5009SDC
Rating: 4.7 (12 reviews)

IC REG BUCK ADJ 150MA 8WSON

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製造商。部分 #LM5009SDC
包 WSON EP-8
資料表 LM5009SDC DataSheet
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規格

Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Obsolete
Function	Step-Down
OutputConfiguration	Positive
Topology	Buck
OutputType	Adjustable
NumberofOutputs	1
Voltage-Input(Min)	9.5V
Voltage-Input(Max)	95V
Voltage-Output(Min/Fixed)	2.5V
Voltage-Output(Max)	85V
Current-Output	150mA
SynchronousRectifier	No
OperatingTemperature	-40°C ~ 125°C (TJ)
MountingType	Surface Mount
Package/Case	8-WDFN Exposed Pad

概述

Description

LM5009SDC is a DC-DC buck regulator IC that integrates the switching transistor and control logic for a compact, efficient step-down converter. It targets small, low-cost power supplies in automotive, industrial, and consumer electronics. The device uses fixed-frequency, current-mode control, with an external feedback network to set the output. It includes protection features (such as overcurrent/short-circuit and thermal shutdown) and requires only a few external components (inductor, input/output capacitors, and feedback resistors). The “SDC” suffix denotes the specific package/revision suitable for surface-mount assemblies. Typical applications include LED driver/regulation stages, microcontroller or FPGA power rails, and other battery-powered or space-constrained power supplies. Use it by connecting Vin, the inductor and diode (or use synchronous mode), and the feedback network to set Vout, per the datasheet recommendations.

Features

LM5009SDC is a high-voltage, integrated-switch LED driver with current-mode control. Key features:
- Integrated high-voltage switch (up to ~650 V) for off-line/universal input
- Continuous constant-current LED regulation via external sense resistor
- Primary-side flyback/forward topology with efficient operation (valley/leading-edge style)
- Dimming support (PWM or DC analog dimming)
- Protections: UVLO, overcurrent/short-circuit, thermal shutdown, open-load protection
- Soft-start to limit inrush and EMI
- Wide input voltage range suitable for various LED strings
- Compact package (SDC)
Note: Refer to the datasheet for exact voltage/current ranges, switching frequency, and pinout.

Package

LM5009SDC comes in an 8-pin SOIC (Small Outline Integrated Circuit) package.

Pinout

- Pin count: 8 pins (SOP-8/SOIC-8 package).
- Function: LM5009SDC is a high-voltage, current‑mode switching regulator used as a constant‑current LED driver (integrated switch MOSFET). It regulates LED current via a sense resistor and feedback network, with external inductor, diode, and capacitors. Typical pins provide VIN, GND, LX (switch node), FB (feedback), ISET/IS (current programming), EN (enable), and two control/diagnostic pins (exact names depend on package variant). For exact pinout, consult the datasheet.

Manufacturer

Texas Instruments (TI) is the manufacturer. TI is an American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits.

Application

LM5009SDC is a high-voltage, high-efficiency switching regulator. Common applications include:
- LED driver circuits (constant-current backlighting)
- General DC-DC buck converters for consumer electronics
- Automotive power management (12–24 V rails)
- Power adapters and wall-wart supplies
- Portable/battery-powered devices and compact solar/battery charging circuits

Equivalent

I can help, but I need specs. Do you want direct cross-refs (TI equivalents) or any buck regulator with similar performance? Please share: input voltage range, output voltage, max load/current, package, and whether you need an internal-switch device. This will let me give accurate alternatives.