a5972d STMicroelectronics, a5972d Datasheet
a5972d
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a5972d Summary of contents
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... November 2007 2A switch step down switching regulator to 85 °C Description The A5972D is a step down monolithic power switching regulator with a minimum switch current limit able to deliver more than 1 current to the load depending on the application conditions. The output voltage can be set from 1.235 The device uses an internal P-channel D- MOS transistor (with a typical Rdson of 250 mΩ ...
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... Contents Contents 1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2/12 A5972D ...
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... A5972D 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 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 extenal resistive divider is required for higher output voltages ...
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... 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 4/12 Parameter A ≤ 70°C Parameter A5972D Value Unit int. limit 1.2 W -40 to 150 °C -55 to 150 °C SO8 ...
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... A5972D 3 Electrical characteristics Table 4. Electrical characteristics (T Symbol Operating input voltage V CC range R Mosfet on resistance DS(on) Maximum limiting I L current f Switching frequency SW Duty cycle Dynamic characteristics (see test circuit). V Voltage feedback 5 η Efficiency DC characteristics Total operating I qop quiescent current I Quiescent current q Error amplifier ...
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... Typical characteristics 4 Typical characteristics Figure 3. Output voltage vs junction temperature Figure 5. Output voltage vs junction temperature Figure 7. Shutdown current vs junction temperature 6/12 Figure 4. Line regulatior Figure 6. Quiescent current vs junction temperature Figure 8. Junction temperature vs output current A5972D ...
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... A5972D Figure 9. Junction temperature vs output current Figure 11. Efficiency vs output current Figure 10. Efficiency vs. output current 7/12 ...
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... 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. ECOPACK specifications are available at: 8/12 www.st.com A5972D ...
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... A5972D Table 5. 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 12. Package dimensions mm. Min Typ Max 1.35 1.75 0.10 0.25 1.10 1.65 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.27 5.80 6.20 0.25 0.50 0.40 1.27 0° (min.), 8° (max.) ...
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... Order codes 6 Order codes Table 6. Order code Order code A5972D A5972D013TR 10/12 Package SO8 Tape and reel A5972D Packing Tube ...
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... A5972D 7 Revision history Table 7. Document revision history Date 06-Aug-2007 5-Nov-2007 Revision 1 Initial release 2 Updated: Table 4 on page 5 Changes 11/12 ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 12/12 Please Read Carefully: © 2007 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com A5972D ...