E-L5971 STMicroelectronics, E-L5971 Datasheet
E-L5971
Specifications of E-L5971
Related parts for E-L5971
E-L5971 Summary of contents
Page 1
... An internal oscillator fixes the switching frequency at 250KHz. Having a minimum input voltage of 4.4V only particularly suitable for 5V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection ...
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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Application ideas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2/16 ...
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... D98IN955 Regulator output. Master/slave synchronization. A logical signal (active high) disables the device. If INH not used the pin must be grounded. When it is open an internal pull-up disable the device. E/A output for frequency compensation. Feedback input. Connecting directly to this pin results in an output voltage of 1 ...
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... Electrical data 2 Electrical data 2.1 Maximum ratings Table 2. Absolute maximum ratings Symbol V Input voltage 8 V Output DC voltage 1 Output peak voltage 0.1µs I Maximum output current Analog pins INH 3 V SYNC 2 P Power dissipation at T TOT T Operating junction temperature range J T Storage temperature range STG 2 ...
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... CC 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 q Total stand-by I qst-by quiescent current Inhibit ...
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... V = 2.33V sync I = 3mA source no load 1.65V sync 5mA REF V = 4.4V to 36V 0mA REF V = 4.4V to 36V 5mA REF from -40 to 125°C. Specification over the -40 to +125 T J L5970D Min Typ Max Unit 1 1.5 mA µA 2 2 REF 0.74 V 0.11 0. ...
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... Io (A) Line regulator 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 Vcc (V) Output voltage vs junction temperature Vo (V) 1.25 1.24 1.23 1.22 Vcc = 12V 1.21 1.2 - (°C) 1 Vcc=12V 100 150 7/16 ...
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... Vo= Vo=3. Vcc=12V 72 70 0.1 0.2 0.3 8/16 Figure 10. Switching frequency vs Fsw (KHz) 50 100 150 Tj (°C) Figure 12. Efficiency vs output current 50 100 150 Tj (°C) Vo=2.5V 0.4 0.5 0.6 0.7 0.8 0 (A) junction temperature 260 250 240 Vcc = 12V 230 Vo = 3.3V 220 - 100 ...
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... L5970D 5 Application circuit Figure 14. Demo board application circuit VIN = 4.4V to 25V C1 10µF 25V CERAMIC Table 5. Component list Reference VREF 3.3V 6 VCC 8 L5970D SYNC. 2 COMP INH. GND 22nF C3 R3 220pF 4.7K Part number GRM32DR61E106KA12L 10µF, 25V POSCAP 10TPB100M 100µF, 10V ...
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... Application circuit Figure 15. PCB layout (component side) Figure 16. PCB layout (bottom side) Figure 17. PCB layout (front side) 10/16 L5970D ...
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... L5970D 6 Application ideas Figure 18. Dual output voltage with auxiliary winding VIN=12V C1 10uF C2 25V 220pF Ceramic Figure 19. Buck-boost regulator VIN=12V C1 C2 10uF 10uF 35V 25V Ceramic Ceramic Vin=12V Vout=-12V Iout=0.5A Efficiency=81% Figure 20. Positive Buck-Boost regulator VIN=5V C1 10uF C2 25V 220pF Ceramic Vin=5V Vout=12V Iout=0.3A Efficiency=76% Figure 21 ...
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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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... Table 6. 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 22. Package dimensions mm. Min Typ Max 1.35 1.75 0.10 0.25 1.10 1.65 0.33 0.51 0.19 ...
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... Order codes 8 Order codes Table 7. Order codes Part number L5970D L5970D013TR 14/16 Package Packaging SO8 SO8 Tape and reel L5970D Tube ...
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... L5970D 9 Revision history Table 8. Revision history Date 26-Jan-2007 16-Mar-2007 16-Oct-2007 Revision 14 Updated Table 5 on page 9 15 Mechanical data typo 16 Updated Section 5: Application circuit on page 9 Revision history Changes 15/16 ...
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