L5972 STMicroelectronics, L5972 Datasheet
L5972
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L5972 Summary of contents
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... May 2003 ORDERING NUMBERS: L5972D (SO8) DESCRIPTION The L5972D is a step down monolithic power switch- ing regulator with a minimum switch current limit able to deliver more than 1.5A DC current to the load depending on the application conditions. The output voltage can be set from 1.235V to 35V. ...
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... L5972D PIN CONNECTION PIN DESCRIPTION N° Pin 1 OUT Regulator Output. 2,3,6,7 GND Ground. 4 COMP E/A output for frequency compensation Feedback input. Connecting directly to this pin results in an output voltage of 1.23V. An external resistive divider is required for higher output voltages. 8 VCC Unregulated DC input voltage. ...
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... I < 12V O CC Duty Cycle = 1.5V FB VFB = 1V VFB = 1. 1.9V COMP 1.9V 1.5V COMP -0.1mA to 0.1mA comp V = 1.9V COMP L5972D Min. Typ. Max. Unit * 4 0.375 0. 2 212 250 280 KHz 225 250 275 KHz 0 100 % 1.220 1.235 1.25 ...
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... L5972D Figure 1. Output Voltage vs. Junction Temperature Vo (V) 3.312 Vcc = 12V 3.308 Vo = 3.3V 3.304 Tj = 25°C 3.3 3.296 3.292 3.288 3.284 Tj = 125°C 3.28 3.276 0 0.5 Io (A) Figure 2. Line Regulation Vo (V) 3.312 Vcc = 12V 3.308 25°C 3.304 3.3 3.296 3.292 Tj = 125°C 3.288 3.284 3.28 3.276 0 10 ...
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... L5972D GND R3 4.7K D03IN1438 Part Number 10 F, 25V 100 F, 10V 220pF, 5%, 50V 22nF, 10%, 50V 5.6K, 1%, 0.1W 0603 3.3K, 1%, 0.1W 0603 4.7K, 1%, 0.1W 0603 2A, 25V OUT D1 R1 STPS2L25U 5. 3.3K Description Manufacturer TOKIN Sanyo KEMET KEMET Neohm Neohm Neohm ST COILCRAFT L5972D VOUT=3.3V C2 100 F 10V 5/10 ...
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... L5972D Figure 8. PCB layout (component side) Figure 9. PCB layout (bottom side) Figure 10. PCB layout (front side) Sideways two graphs show the Tj versus output current in different conditions of the input and output voltage. 6/10 42mm 34mm ...
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... Tamb.=25 °C 80.0 70.0 60.0 50.0 40.0 30.0 20.0 0.2 0.4 0.6 0.8 1 1.2 Io(A) Figure 12. Junction Temperature vs. Output Current TJ(°C) 100.0 90.0 Vin=12V 80.0 Tamb= 25°C 70.0 60.0 50.0 40.0 30.0 20.0 0.2 0.4 0.6 0.8 1 1.2 Io(A) Figure 13. Efficiency vs. Output Current Vo=2.5V 89 Vo=3. Vo=1. 1.4 1.6 1.8 2 0.1 Figure 14. Efficiency vs. Output Current Vo=5V Vo=3. Vo=2. 0.1 1.4 1.6 1.8 2 Vo=3.3V Vo=3.3V Vo=2.5V Vo=2.5V Vo=1.8V Vo=1.8V Vcc=5V 0.3 0.5 0.7 0.9 1.1 1.3 Io (A) Vo=5V Vo=5V Vo=3.3V Vo=3.3V Vo=2.5V Vo=2.5V Vin=12V Vin=12V 0.3 0.5 0.7 0.9 1.1 1.3 Io (A) L5972D 1.5 1.7 1.5 1.7 7/10 ...
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... R3 4.7k 8/10 OUT 1 D1 STPS2L25U L5972D GND OUT 8 1 L5972D GND OUT 1 D1 L5972D STPS2L25U GND L1 D2 33uH STPS2L25U VOUT=12V/0.45A 24k C4 M1 100uF STN4NE03L 16V 2.7k L1 33uH D1 STPS2L25U VOUT=-12V/0.45A 2.7k C5 100uF 24k 16V ...
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... D and F do not include mold flash or protrusions. Mold flash or potrusions shall not exceed 0.15mm (.006inch). inch MIN. TYP. MAX. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244 0.050 0.150 0.15 0.157 0.050 0.024 OUTLINE AND MECHANICAL DATA SO8 L5972D 9/10 ...
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... L5972D Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...