L7985 | Product - STMicroelectronics

Tools & Software

Quality & Reliability

Get Started

Partner products

Sales Briefcase

Please enter your desired search query and search again

Product overview

Description

The L7985/A is a step-down switching regulator with a 2.5 A (minimum) current limited embedded power MOSFET, so it is able to deliver up to 2 A current to the load depending on the application conditions. The input voltage can range from 4.5 V to 38 V, while the output voltage can be set starting from 0.6 V to V_IN. Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz. The DFN and the HSOP packages with exposed pad allow the reduction of R_thJAdown to 60 °C/W and 40 °C/W respectively.

All features
2 A DC output current

4.5 V to 38 V input voltage

Output voltage adjustable from 0.6 V

250 kHz switching frequency, programmable up to 1 MHz

Internal soft-start and enable

Low dropout operation: 100% duty cycle

Voltage feed-forward

Zero load current operation

Overcurrent and thermal protection

VFDFPN 3x3 - 10L and HSOP8 package
Read more Read less

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Choose design tool:

Power Management Design Center

Power Supply Design Tool

• SMPS design, by topology, by type and by product

• PFC design with analog and digitial control

• Supports various PCB configurations

Choose type:

DC/DC

AC/DC

Solar Battery Charger

Power Management Design Center

LED Lighting Design Tool

• Handles AC-DC and DC-DC design in common topologies

• Displays interactive and annotated schematic

• Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data

Choose type:

DC/DC

AC/DC

Power Management Design Center

Digital Power Workbench

• Provides a step-by-step optimized design of power section and control loop

• Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

Power Management Design Center

Power Tree Designer

• Specify input/output power for each node in the tree

• Check for consistency

• Design each individual node

Choose design tool:

Thermal-electrical Simulators for Components

AC Switches Simulator

• Select ratings and application waveforms

• Get junction temperature and blocking voltage graphs

• Search and sort suitable devices

Thermal-electrical Simulators for Components

Rectifier Diodes Simulator

• Select ratings and application waveforms

• Estimate power losses

• Search and sort suitable devices

Thermal-electrical Simulators for Components

STPOWER Studio

• Supports long mission profiles

• Provides power loss and temperature graphs

• Helps define heatsink thermal properties

Thermal-electrical Simulators for Components

Twister Sim

• Help select the right ViPOWER Automotive power device

• Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis

• Supports various PCB configurations

Thermal-electrical Simulators for Components

TVS Simulator

• Specify system ratings and surge waveform

• Search and sort suitable devices

Thermal-electrical Simulators for Components

Estimate

• Build simple schematics and firmware inputs in minutes

• Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs

Thermal-electrical Simulators for Components

PCB Thermal Simulator

• Thermal analysis of a PCB from Gerber files.

• Possibility to add heat sources, heat sinks, copper areas and thermal paths.

• Powerful server-side engine for rendering and simulation.

• Thermal results shown graphically via 2D table.

Choose design tool:

Signal Conditioning Design Tool

Active Filters

• Handles multi-stage-designs and common topologies

• Returns circuit component values

• Provides gain, phase and group delay graphs

• Low Pass, High Pass and Band Pass

Signal Conditioning Design Tool

Comparators

• Handles most common configurations

• Returns circuit components values

• Provides I/O signal waveforms

• Inverting, Non Inverting, Window

Signal Conditioning Design Tool

Low side Current Sensing

• Returns circuit component values

• Provides current error graphs

Signal Conditioning Design Tool

High side Current Sensing

• Provides current error graphs.

• Help to select the right High side current sensing and shunt devices.

Choose design tool:

NFC/RFID Calculators

NFC Inductance

• Input geometry and substrate properties

• Get antenna impedance

NFC/RFID Calculators

UHF Link Budget

• Enter forward and reverse link characteristics

• The tool returns link budget estimate

NFC/RFID Calculators

NFC Tuning Circuit

• Enter antenna parameter and matching target

• Select the topology of the matching network

• The tool returns component values for the desired design targets

You might also like...

EDA Symbols, Footprints and 3D Models

All resources

Expand all categories

	Resource title	Version	Latest update

SPICE models (1)

	Resource title	Version	Latest update
ZIP	X798X Pspice model		22 Sep 2016	22 Sep 2016 X798X Pspice model

Quality and Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Longevity Commitment	Longevity Starting Date	Material Declaration**
L7985A	Active	PowerSO-8	Industrial	Ecopack2	-	-	PDF XML
L7985ATR	Active	PowerSO-8	Industrial	Ecopack2	-	-	PDF XML
L7985TR	Active	DFN10 3X3	Industrial	Ecopack2	-	-	PDF XML

L7985A

Package:

PowerSO-8

Material Declaration**:

L7985ATR

Package:

PowerSO-8

Material Declaration**:

L7985TR

Package:

DFN10 3X3

Material Declaration**:

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Swipe or click the button to explore more details Don't show this again

Part Number

Marketing Status

Budgetary Price (US$)*/Qty

Order from ST

Order from distributors

Package

Packing Type

RoHS

Country of Origin

ECCN (US)

ECCN (EU)

Operating Temperature (°C) (min)

Operating Temperature (°C) (max)

Available at distributors

Distributor availability of L7985A

Distributor Name	Region	Stock	Min. Order	Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

Buy from Distributor

Available at distributors

Distributor availability of L7985ATR

Distributor Name	Region	Stock	Min. Order	Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

Buy from Distributor

Available at distributors

Distributor availability of L7985TR

Distributor Name	Region	Stock	Min. Order	Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

Buy from Distributor

L7985A Active

Budgetary Price (US$)*/Qty:

-

Available at distributors

No availability of distributors reported, please contact our sales office

Buy Direct at ST

Add Free Sample

Package:

Packing Type:

RoHS:

Country of Origin:

ECCN (US):

ECCN (EU):

L7985ATR Active

Budgetary Price (US$)*/Qty:

-

Available at distributors

No availability of distributors reported, please contact our sales office

Buy Direct at ST

Add Free Sample

Package:

Packing Type:

RoHS:

Country of Origin:

ECCN (US):

ECCN (EU):

L7985TR Active

Budgetary Price (US$)*/Qty:

-

Available at distributors

No availability of distributors reported, please contact our sales office

Buy Direct at ST

Add Free Sample

Package:

Packing Type:

RoHS:

Country of Origin:

ECCN (US):

ECCN (EU):

Swipe or click the button to explore more details Don't show this again

(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors

Search History

Bookmark

▼