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A6986F 데이터시트 PDF




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부품번호 A6986F 기능
기능 synchronous step-down switching regulator
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A6986F 데이터시트, 핀배열, 회로
A6986F
38 V 1.5 A synchronous step-down switching regulator with 30 µA
quiescent current
Datasheet - production data
HTSSOP16 (RTH = 40 °C/W)
Features
AECQ100 qualification
1.5 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 VOUT = 3.3 V)
8 µA IQ-SHTDWN
Adjustable fSW (250 kHz - 2 MHz)
Fixed output voltage (3.3 V and 5 V) or
adjustable from 0.85 V to VIN
Embedded output voltage supervisor
Synchronization
Adjustable soft-start time
Internal current limiting
Overvoltage protection
Output voltage sequencing
Peak current mode architecture
RDSON HS = 180 m, RDSON LS = 150 m
Thermal shutdown
Description
The A6986F automotive grade device is a step-
down monolithic switching regulator able to
deliver up to 1.5 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.
Applications
Designed for automotive systems
Battery powered applications
Car body applications (LCM)
Car audio and low noise applications (LNM)
April 2015
This is information on a product in full production.
DocID027739 Rev 1
1/72
www.st.com




A6986F pdf, 반도체, 판매, 대치품
Application schematic
1 Application schematic
Figure 1. Application schematic
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4/72 DocID027739 Rev 1

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A6986F 전자부품, 판매, 대치품
A6986F
2.4
Thermal data
Table 3. Thermal data
Symbol
Parameter
Rth JA
Thermal resistance junction ambient (device soldered on the
STMicroelectronics® demonstration board)
Pin settings
Value
40
Unit
C/W
2.5 ESD protection
Symbol
ESD
HBM
MM
CDM
Table 4. ESD protection
Test condition
Value
2
200
500
Unit
KV
V
V
DocID027739 Rev 1
7/72
72

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