L6986 - 38 V, 2 A synchronous step-down switching regulator with 30 µA quiescent current - STMicroelectronics

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Product overview

Description

The L6986 device is a step-down monolithic switching regulator able to deliver up to 2 A DC. The output voltage adjustability ranges from 0.85 V to VIN. Thanks to the P-channel MOSFET high-side power element, the device features 100% duty cycle operation. The wide input voltage range meets the specification for the 5 V, 12 V and 24 V power supplies. The “Low Consumption Mode” (LCM) is designed for applications active during idle mode, so it maximizes the efficiency at light load with controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant overload current range, meeting the low noise application specification. The output voltage supervisor manages the reset phase for any digital load (μC, FPGA, etc.). The RST open collector output can also implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact. Pulse by pulse current sensing on both power elements implements an effective constant current protection.

All features
2 A DC output current

4 V to 38 V operating input voltage

Low consumption mode or low noise mode

30 μA IQ at light load (LCM V_OUT = 3.3 V)

8 μA I_Q-SHTDWN

Adjustable f_SW (250 kHz - 2 MHz)

Output voltage adjustable from 0.85 V to V_IN

Embedded output voltage supervisor
Synchronization

Adjustable soft-start time

Internal current limiting

Overvoltage protection

Output voltage sequencing

Peak current mode architecture

R_{DSON HS} = 180 mΩ, R_{DSON LS} = 150 mΩ

Thermal shutdown
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	Resource title	Version	Latest update

SPICE models (1)

	Resource title	Version	Latest update
ZIP	A6986 Pspice model		30 Sep 2016	30 Sep 2016 A6986 Pspice model

SIMPLIS models (1)

	Resource title	Version	Latest update
ZIP	L6986 SIMPLIS examples schematics	2025.03	26 Mar 2025	26 Mar 2025 L6986 SIMPLIS examples schematics 2025.03

Quality and Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Longevity Commitment	Longevity Starting Date	Material Declaration**
L6986	Active	HTSSOP16	Industrial	Ecopack2	10	2023-06-06T00:00:00.000+02:00	PDF XML
L6986TR	Active	HTSSOP16	Industrial	Ecopack2	10	2023-06-06T00:00:00.000+02:00	PDF XML

L6986

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HTSSOP16

Material Declaration**:

L6986TR

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HTSSOP16

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.

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