L5972D STMicroelectronics, L5972D Datasheet
L5972D
Specifications of L5972D
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L5972D Summary of contents
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... C3 220pF October 2007 2A switch step down switching regulator 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. ...
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... 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 L5972D ...
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... L5972D 1 Pin settings 1.1 Pin connection Figure 2. Pin connection (top view) 1.2 Pin description Table 1. Pin description N° Pin 1 OUT 2,3,6,7 GND 4 COMP VCC OUT 1 8 GND 2 7 GND 3 6 COMP 4 5 D02IN1367 Description Regulator output. Ground. E/A output for frequency compensation. ...
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... Operating junction temperature range j T Storage temperature range stg 2.2 Thermal data Table 3. Thermal data Symbol R Maximum thermal resistance junction-ambient thJA 1. Package mounted on board 4/15 Parameter ≤ 70°C A Parameter L5972D Value Unit int. limit 1.2 W -40 to 150 °C -55 to 150 °C SO8 Unit ° ...
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... L5972D 3 Electrical characteristics Table 4. Electrical characteristics ( T Symbol Operating input V CC voltage range Mosfet on R DS(on) Resistance Maximum limiting I l current f Switching frequency s Duty cycle Dynamic characteristics (see test circuit ). V Voltage feedback 5 h Efficiency DC characteristics Total operating I qop quiescent current I Quiescent current ...
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... Vcc=12V 50 100 150 Tj (°C) Quiescent current vs. junction temperature 2 1.8 1.6 Vcc = 12V 1.4 1.2 - 100 Tj (°C) Shutdown current vs. junction temperature 70 60 Vcc = 12V - (°C) Switching frequency vs. junction temperature 2 1.8 1.6 Vcc = 12V 1.4 1.2 - (°C) L5972D 150 100 150 100 150 ...
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... V Figure 9. Demo board application circuit VIN = 4.4V to 25V C1 10µF 25V CERAMIC Table 5. Component list Reference VCC 8 L5972D COMP 22nF C3 R3 220pF 4.7K Part number GRM32DR61E106KA12L 10µF, 25V POSCAP 10TPB100M 100µF, 10V C1206C221J5GAC 220pF, 5%, 50V C1206C223K5RAC 22nF, 10%, 50V 5 ...
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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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... L5972D Figure 13. Junction temperature vs output current TJ(°C) 100.0 90.0 Vin=5V Tamb.=25 °C 80.0 70.0 60.0 50.0 40.0 30.0 20.0 0.2 0.4 0.6 Figure 15. 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 ...
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... Vcc 8 COMP L5972D GND 22nF 220pF R3 4.7k OUT Vcc 8 1 L5972D GND L1 D2 33uH STPS2L25U 24k M1 STN4NE03L 2.7k L1 33uH OUT 1 D1 STPS2L25U FB VOUT=-12V/0.45A 2. 100uF 24k 16V n=N1/N2 STPS2L25U VOUT=3. STPS2L25U C4 100uF 10V L5972D VOUT=12V/0.45A C4 100uF 16V VOUT1=5V 50mA C5 47uF 10V ...
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... L5972D 7 Package mechanical data 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 ...
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... L5972D inch Min Typ Max 0.053 0.069 0.004 0.010 0.043 0.065 0.013 0.020 0.007 0.010 0.189 0.197 0.15 0.157 ...
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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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... L5972D Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...