L6986 Datasheet, PDF (1/68 Pages) STMicroelectronics – 38 V, 2 A synchronous step-down switching regulator with 30 A quiescent current

L6986
38 V, 2 A synchronous step-down switching regulator with 30 μA
quiescent current
Datasheet - production data
HTSSOP16 (R_TH = 40 °C/W)
Features
 2 A DC output current
 4 V to 38 V operating input voltage
 Low consumption mode or low noise mode
 30 A IQ at light load (LCM V_OUT = 3.3 V)
 8 A 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 m, R_{DSON LS} = 150 m
 Thermal shutdown
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.
Applications
 Designed for 12 V and 24 V buses
 Programmable logic controllers (PLCs)
 Decentralized intelligent nodes
 Sensors and low noise applications (LNM)
August 2016
This is information on a product in full production.
DocID025376 Rev 7
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