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STEVAL-ISA159V1 Datasheet(PDF) 1 Page - STMicroelectronics

No. de pieza STEVAL-ISA159V1
Descripción Electrónicos  Thermal shutdown
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
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STEVAL-ISA159V1 Datasheet(HTML) 1 Page - STMicroelectronics

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May 2015
DocID26977 Rev 2
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For further information contact your local STMicroelectronics sales
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www.st.com
STEVAL-ISA159V1
High efficiency synchronous step-down regulator based on the
L6984
Data brief
Features
400 mA DC output current
4.5 V to 36 V operating input voltage
Synchronous rectification
Low consumption mode or low noise mode
100 µA IQ at light load (LCM VOUT = 3.3 V)
13 µA IQ-SHTDWN
Adjustable fSW (250 kHz - 600 kHz)
Output voltage adjustable from 0.9 V
No resistor divider required for 3.3 V VOUT
VBIAS maximizes efficiency at light load
350 mA valley current limit
Constant on-time control scheme
PGOOD open collector
Thermal shutdown
RoHS compliant
Description
The STEVAL-ISA159V1 product evaluation board
is based on L6984, a high-efficiency monolithic
synchronous step-down regulator, capable of
delivering up to 400 mA of DC current. The fixed
3.3 V output requires no external resistor divider.
The L6984 is suited for home appliances, factory
and building automation. The Low Consumption
Mode (LCM) is designed for eco-friendly home
appliances and automotive 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 nearly constant over the load current
range, serving low noise application
specifications such as audio and sensors. The
PGOOD open collector output can 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 ensure a
compact application size. Pulse-by-pulse current
sensing on the low-side power element
implements effective constant current protection.


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