• packageimg


Very low drop and low noise voltage regulator with inhibit function


  • 90-day after-sales guarantee
  • 365 Days Quality Guarantee
  • Genuine Product Guarantee
  • 7*24 hours service quarantee
  • Part Number : LD2985BM33R

  • Package/Case : SOT-23-5

  • Brands : ST

  • Components Categories : Voltage Regulators - Linear

  • Datesheet : LD2985BM33R DataSheet (PDF)

Quick Inquiry

Please submit RFQ for LD2985BM33R or email to us: Email: [email protected], we will contact you in 12 hours.

Technical Attributes

DescriptionThe LD2985 is a 150 mA fixed output voltage regulator. The ultra low drop voltage and the low quiescent current make them particularly suitable for low noise, low power applications, and in battery powered systems. In sleep mode quiescent current is less than 1 µA when INHIBIT pin is pulled low. Shutdown logic control function is available on pin 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. An external capacitor, CBYP = 10 nF, connected between bypass pin and GND reduces the noise to 30 µVrms. Typical application are in cellular phone, palmtop laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.Features• Very low dropout voltage (280 mV at 150 mA and 7 mV at 1 mA load)• Very low quiescent current (2 mA typ. at 150 mA load and 80 µA at no load)• Output current up to 150 mA• Logic controlled electronic shutdown• Output voltage of 1.8, 2.5, 2.8, 3, 3.1, 3.3, 5 V• Internal current and thermal limit• Low output noise voltage 30 mVrms• Small package SOT23-5L• Temperature range: - 40°C to 125 °C

Key Features

  • Very low dropout voltage (280 mV at 150 mA and 7 mV at 1 mA load)
  • Very low quiescent current (2 mA typ. at 150 mA load and 80 µA at no load)
  • Output current up to 150 mA
  • Logic controlled electronic shutdown
  • Output voltage of 1.8, 2.5, 2.8, 3, 3.1, 3.3, 5 V
  • Internal current and thermal limit
  • Low output noise voltage 30 mVrms
  • Small package SOT23-5L
  • Temperature range: - 40°C to 125 °C


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Source Content uid LD2985BM33R Part Life Cycle Code Active
Ihs Manufacturer STMICROELECTRONICS Part Package Code SOT-23
Package Description LSSOP, TSOP5/6,.11,37 Pin Count 5
Reach Compliance Code compliant ECCN Code EAR99
HTS Code 8542.39.00.01 Factory Lead Time 54 Weeks
Samacsys Manufacturer STMicroelectronics Adjustability FIXED
Dropout Voltage1-Max 0.575 V Dropout Voltage1-Nom 0.28 V
Input Voltage Absolute-Max 16 V Input Voltage-Max 16 V
Input Voltage-Min 2.5 V JESD-30 Code R-PDSO-G5
JESD-609 Code e3 Length 2.9 mm
Line Regulation-Max 0.0124% Moisture Sensitivity Level 1
Number of Functions 1 Number of Outputs 1
Number of Terminals 5 Operating Temperature TJ-Max 125 °C
Operating Temperature TJ-Min -40 °C Output Current1-Max 0.15 A
Output Voltage1-Max 3.432 V Output Voltage1-Min 3.168 V
Output Voltage1-Nom 3.3 V Package Body Material PLASTIC/EPOXY
Package Code LSSOP Package Equivalence Code TSOP5/6,.11,37
Packing Method TR Peak Reflow Temperature (Cel) 260
Qualification Status Not Qualified Regulator Type FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
Seated Height-Max 1.45 mm Surface Mount YES
Technology BIPOLAR Terminal Finish MATTE TIN
Terminal Form GULL WING Terminal Pitch 0.95 mm
Terminal Position DUAL Time@Peak Reflow Temperature-Max (s) 30
Voltage Tolerance-Max 3.5% Width 1.625 mm
Manufacturer STMicroelectronics Product Category LDO Voltage Regulators
RoHS Details Mounting Style SMD/SMT
Package / Case SOT-23-5 Output Voltage 3.3 V
Output Current 150 mA Polarity Positive
Quiescent Current 100 uA Input Voltage, Min 2.5 V
Input Voltage, Max 16 V Output Type Fixed
Minimum Operating Temperature - 40 C Maximum Operating Temperature + 125 C
Dropout Voltage 575 mV Series LD2985
Brand STMicroelectronics Dropout Voltage - Max 575 mV
Height 1.3 mm Ib - Input Bias Current 80 uA
Line Regulation 0.014 %/V Output Voltage Range -
Product Type LDO Voltage Regulators Factory Pack Quantity 3000
Subcategory PMIC - Power Management ICs Voltage Regulation Accuracy 2.5 %
Unit Weight 0.000222 oz

Warranty & Returns

Warranty, Returns, and Additional Information

  • QA & Return Policy

    Parts Quality Guarantee: 365 days

    Returns for refund: within 90 days

    Returns for Exchange: within 90 days

  • Shipping and Package

    Shipping:For example, FedEx, SF, UPS, or DHL.UPS, or DHL.

    Parts Packaging Guarantee: Featuring 100% ESD anti-static protection, our packaging incorporates high toughness and superior buffering capabilities.

  • Payment

    For example, channels like VISA, MasterCard, UnionPay, Western Union, PayPal, and more.

    If you have specific payment channel preferences or requirements, please get in touch with our sales team for assistance.