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PM6644 Datasheet(PDF) 8 Page - STMicroelectronics

Part # PM6644
Description  350 mA adjustable step-down regulator
PDF  35 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM6644 Datasheet(HTML) 8 Page - STMicroelectronics

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Simplified application schematic
PM6644
8/35
Doc ID 023203 Rev 1
1.2
Absolute maximum ratings
1.3
Thermal data
1.4
Recommended operating conditions
Table 3.
Absolute maximum ratings
Parameter
Value
Unit
VIN to GND
-0.3 to 35
V
EN, SW, TON to GND
-0.3 to VIN +0.3
V
VCC, BYP
-0.3 to 6
V
REF, FB to GND
-0.3 to VCC +0.3
V
REF3 to GND
-0.3 to BYP +0.3
V
Power dissipation at Tamb = 25 °C
2.25
W
Maximum withstanding voltage range test condition: CDF-AECQ100-
002- “human body model” acceptance criteria: “normal performance”.
±1000
V
Table 4.
Thermal data
Symbol
Parameter
Value
Unit
Rthj-a
Thermal resistance junction to ambient
45
°C/W
Tj
Junction operating temperature range
-40 to 125
°C
Table 5.
Recommended operating conditions
Symbol
Parameter
Value
Unit
Min.
Typ.
Max.
VIN
Input voltage range
4.5
25
V
EN
EN voltage range
0
25
V
BYP
BYP operative voltage range
0
5
V
Switching regulator
embedded high-side
MOSFET(1)
RMS current capability
300
mA
Switching regulator
embedded low-side
MOSFET
300
mA
1.
Refer to Section 3.1.4: Maximum RMS output current.



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