E-L5972D013TR STMicroelectronics, E-L5972D013TR Datasheet

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... Description The L5972D is a step down monolithic power switching 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. The device uses an internal P-Channel D-MOS transistor (with a typical Rdson of 250mΩ ...

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... Contents 1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Application ideas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 ...

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... COMP 4 5 D02IN1367 Description Regulator output. Ground. 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. Unregulated DC input voltage. Pin settings VCC GND GND FB 3/15 ...

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... Electrical data 2 Electrical data 2.1 Maximum ratings Table 2. Absolute maximum ratings Symbol V Input voltage 8 Out pin DC voltage V 1 Out pin peak voltage at ∆t = 0.1µs I Maximum output current Analog pins Power dissipation at T tot T Operating junction temperature range j T Storage temperature range stg 2 ...

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... 1.9V; COMP 1.9V; COMP ∞ -0.1mA to comp 0.1mA V = 1.9V COMP from -40 to 125°C. Specification over the -40 to +125 T J Electrical characteristics = 12V, unless otherwise specified) CC Min Typ Max ( 4.4 36 (1) 0.250 0.5 2 2.5 (1) 212 250 280 225 250 275 ...

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... Typical characteristics 4 Typical characteristics Figure 3. Output voltage vs. junction temperature Vo (V) 3.312 Vcc = 12V 3.308 Vo = 3.3V 3.304 3.3 3.296 3.292 3.288 3.284 3.28 3.276 0 0.5 Figure 5. Line regulator Vo (V) 3.312 Vcc = 12V 3.308 Vo = 3.3V 3.304 3.3 3.296 3.292 3.288 3.284 3.28 3.276 ...

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... Application circuit In figure 8 is shown the demo board application circuit for the device in SMD version, where the input supply voltage, Vcc, can range from 4.4V to 25V due to the rated voltage of the input capacitor and the output voltage is adjustable from 1.235V to V Figure 9. ...

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... Application circuit Figure 10. PCB layout (component side) Figure 11. PCB layout (bottom side) Figure 12. PCB layout (front side) Sideways two graphs show the T and output voltage. 8/15 versus output current in different conditions of the input J L5972D ...

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... Figure 14. Efficiency vs output current Vo=2.5V Vo=3.3V Vo=1.8V 0.8 1 1.2 1.4 1.6 1.8 2 Io(A) Figure 16. Efficiency vs output current Vo=3.3V Vo=5V Vo=2.5V 0.8 1 1.2 1.4 1.6 1.8 2 Io(A) Application circuit 95 93 Vo=3.3V Vo=3. Vo=2.5V Vo=2 ...

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... Figure 17. Positive buck-boost regulator Vcc VIN=5V C1 10uF C3 C2 10V 22nF 220pF Ceramic R3 4.7k Figure 18. Buck-boost regulator VIN= 10uF 10uF 10V 25V Ceramic Ceramic Figure 19. Dual output voltage with auxiliary winding VIN=12V COMP C1 10uF C3 C2 25V 22nF 220pF R3 4.7k 10/15 OUT COMP STPS2L25U L5972D ...

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... In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK trademark. ...

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... SO-8 Mechanical data Dim ( ddd 1. Dimensions D does not include mold flash, protru-sions or gate burrs. Mold flash, potrusions or gate burrs shall not exceed 0.15mm (.006inch) in total (both side). Figure 20. Package dimensions 12/15 mm. Min Typ Max 1.35 1.75 0.10 0.25 1.10 1.65 0.33 0.51 ...

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... L5972D 8 Order codes Table 7. Order codes Part number L5972D L5972D013TR Package Packaging SO8 SO8 Tape and reel Order codes Tube 13/15 ...

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... Revision history 9 Revision history Table 8. Revision history Date 02-Feb-2007 10-Apr-2007 16-Oct-2007 14/15 Revision 8 Updated Table 5 on page 7 9 Mechanical data typo 10 Updated Section 5: Application circuit on page 7 L5972D Changes ...

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