LP3985IM5-2.8

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LP3985IM5-2.8

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IC REG LINEAR 2.8V 150MA SOT23-5

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Thông số kỹ thuật

thuộc tính Giá trị
Package / Case Tape & Reel (TR)
Part Status Obsolete
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 6V
Voltage - Output (Min/Fixed) 2.8V
Voltage Dropout (Max) 0.1V @ 150mA
Current - Output 150mA
Current - Quiescent (Iq) 150 µA
Current - Supply (Max) 250 µA
PSRR 50dB ~ 40dB (1kHz ~ 10kHz)
Control Features Enable
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C
Mounting Type Surface Mount

Tổng quan

Description

LP3985IM5-2.8 is a fixed 2.8 V low-dropout regulator from onsemi (ON Semi) in the compact IM5 5‑pin package. It provides a stable 2.8 V rail from a higher input supply with features such as low dropout, low quiescent current, and built‑in protections (current limit and thermal shutdown). An enable (EN) pin allows turning the device on/off.
Typical circuit notes:
- Requires proper decoupling: input capacitor and an output capacitor within the recommended ESR range.
- Output can source tens to hundreds of milliamps (depends on the exact variant and conditions).
- Suitable for battery-powered μC, sensors, and other portable electronics needing a small 2.8 V supply.
Pinout and exact electrical specs vary by version; consult the LP3985IM5-2.8 datasheet for the precise pin configuration, input/output voltage ranges, current capability, and recommended external capacitors.

Equivalent

Possible equivalents for LP3985IM5-2.8 (2.8V fixed LDO, ~150 mA):
- ST LP2985-2.8 (2.8V fixed, SOT-23-5)
- TI TLV70028 (2.8V fixed, SOT-23-5)
- Microchip MCP1700-2.8 (2.8V fixed, up to 250 mA, SOT-23)
- Analog Devices ADP151AUJZ-2.8 (2.8V fixed, SOT-23-5)
Note: pinouts/footprints differ; verify package and dropout/current specs for a drop-in replacement.

Features

Key features of LP3985IM5-2.8:
- Fixed output: 2.8 V
- Load current: up to ~150 mA
- Low dropout voltage for efficient operation with small Vin–Vout gap
- Very low quiescent current
- Built-in protections: current limit, thermal shutdown, short-circuit protection
- Input voltage range up to about 6 V
- Reverse-current protection
- 5-pin IM5 package (compact, suitable for small boards)
- No external components required (fixed-output regulator)

Pinout

Pin count: 5 pins.
Function (typical for LP3985IM5-2.8 in a SOT-23-5 package):
- VIN: input supply
- GND: ground reference
- VOUT: regulated 2.8 V output
- EN: enable input
- BYP: optional bypass capacitor pin for noise reduction (may be unused on fixed versions)
Note: If BYP is not used in your layout, leave it unconnected or per datasheet guidance.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- About the company: TI is a global semiconductor company that designs and manufactures analog and digital integrated circuits used in a wide range of electronics.

Application

LP3985IM5-2.8 is a fixed 2.8V low-dropout regulator. Applications:
- Local 2.8V rail for portable/battery-powered devices
- Powering microcontrollers, memory, RF modules, sensors, and analog front-ends (op-amps, ADC/DAC)
- LCD/backlight bias supplies
- Wearables, cameras, handheld instruments, and IoT devices
- General consumer electronics requiring a stable, low-noise 2.8V supply with compact footprint

Package

LP3985IM5-2.8 is in a 5-pin SOT-23 (SC-70-5) surface-mount package.

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