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Product details

Parameters

Output options Adjustable Output Iout (Max) (A) 1.5 Vin (Max) (V) 7 Vin (Min) (V) 2.5 Vout (Max) (V) 6.6 Vout (Min) (V) 1.23 Noise (uVrms) 100 Iq (Typ) (mA) 4 Thermal resistance θJA (°C/W) 50 Load capacitance (Min) (µF) 10 Rating Catalog Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (Typ) (mV) 240 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-223 (NDC) 5 45 mm² 6.5 x 6.96 TO-220 (NDH) 5 86 mm² 10.16 x 8.47 TO-263 (KTT) 5 155 mm² 10.16 x 15.24 open-in-new Find other Linear regulators (LDO)

Features

  • Ultra Low Dropout Voltage
  • Stable with Selected Ceramic Capacitors
  • Low Ground Pin Current
  • Load Regulation of 0.06%
  • 10nA Quiescent Current in Shutdown Mode
  • Specified Output Current of 1.5A DC
  • Available in DDPAK/TO-263, TO-220 and SOT-223 Packages
  • Overtemperature/Overcurrent Protection
  • −40°C to +125°C Junction Temperature Range

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Description

The LP3855-ADJ fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. These ultra low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. The LP3855-ADJ is developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3855-ADJ to operate under extremely low dropout conditions.

Dropout Voltage: Ultra low dropout voltage; typically 24mV at 150mA load current and 240mV at 1.5A load current.

Ground Pin Current: Typically 4mA at 1.5A load current.

Shutdown Mode: Typically 10nA quiescent current when the shutdown pin is pulled low.

Adjustable Output Voltage: The output voltage may be programmed via two external resistors.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet LP3855-ADJ 1.5A Fast Response Ultra Low Dropout Linear Regulators datasheet (Rev. F) Apr. 08, 2013
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Technical articles LDO basics: noise – part 1 Jun. 14, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 5 View options
SOT-223 (NDC) 5 View options
TO-220 (NDH) 5 View options

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