Custom Meta Tags - Dynamic

Hero Banner

New Product Introduction

NPI Body

STMicroelectronics A6986H

A6986H - Automotive 38 V, 2 A synchronous step-down switching regulator with 30 µA quiescent current

The A6986H automotive grade 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 and the wide input voltage range meet the cold crank and load dump specifications for automotive systems. The “low consumption mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light-load with 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 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.

Features

AEC-Q100 qualified
2 A DC output current
4 V to 38 V operating input voltage
Low consumption mode or low noise mode
30 µA I_Q at light-load (LCM V_OUT = 3.3 V)
8 µA I_Q-SHTDWN
Adjustable f_SW (250 kHz - 2 MHz)
Fixed output voltage (3.3 V and 5 V) or 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_{DS(on) HS} = 180 mΩ, R_{DS(on) LS} = 150 mΩ
Thermal shutdown

BUY ONLINE AT AVNET EMEA

STEVAL-ISA205V1 - 38 V, 2 A synchronous step-down switching regulator evaluation board based on the A6986H

The STEVAL-ISA205V1 product evaluation board is based on the synchronous step-down switching regulator A6986H that can deliver up to 2 A and withstand cold cranking across 100% duty cycle, which, along with its wide input operating voltage range, render the A6986H the ideal choice for battery powered automotive systems.

Synchronous rectification helps to achieve higher efficiency at full load as well as application compactness, while high-frequency switching (programmable up to 2 MHz) helps to cut power passive costs and size, while staying outside of the AM band.

The device can operate in a Low Consumption Mode (LCM) with a quiescent current down to 30 µA at V_IN = 12 V and V_OUT = 3.3 V, hence assuring high efficiency at light loads, as required in typical car body applications that are active during car parking.

A Low Noise Mode (LNM) is also available to meet the requirements of infotainment applications of forced PWM mode in all loading conditions.
The default configuration of the board is output voltage set to 3.3 V configured in LCM, 500 kHz switching frequency, ISKIP current set to high level and the switchover feature disabled. All of these settings can be easily changed by the user to evaluate different application scenarios.