A6986 Datasheet, PDF (1/67 Pages) STMicroelectronics – 38 V, 2 A synchronous step-down switching regulator

A6986
38 V, 2 A synchronous step-down switching regulator with 30 µA
quiescent current
Datasheet - production data
HTSSOP16 (R_TH = 40 °C/W)
Features
 AECQ100 qualification
 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 m, R_{DSON LS} = 150 m
 Thermal shutdown
Description
The A6986 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. The 100% duty cycle capability to
withstand the cold crank event and the wide input
voltage range make the A6986 device ideal for
battery powered automotive systems. The “Low
Consumption Mode” (LCM) is designed for
applications active during car parking, so it
maximizes the efficiency at the light-load with the
controlled output voltage ripple. The “Low Noise
Mode” (LNM) makes the switching frequency
constant and minimizes the output voltage ripple
overload current range, meeting the low noise
application specification like car audio. The output
voltage supervisor manages the reset phase for
any digital load (µC, FPGA). The RST open
collector output can also implement output
voltage sequencing during the power-up phase.
The synchronous rectification, designed for high
efficiency at the medium - heavy load, and the
high switching frequency capability makes the
size of the application compact. Pulse-by-pulse
current sensing on both power elements
implements effective constant current protection.
Applications
 Designed for automotive systems
 Battery powered applications
 Car body applications (LCM)
 Car audio and low noise applications (LNM)
November 2015
This is information on a product in full production.
DocID026211 Rev 6
1/67
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