l6996dtr STMicroelectronics, l6996dtr Datasheet
l6996dtr
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l6996dtr Summary of contents
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... The active droop allows adjust both the output load- line slope and the zero-load output voltage. 25V OSC 5V BOOT HGATE SENSE PHASE LGATE LS L6996 DS PGND GND CS+ CS- VFB- VFB+ VPROG C VPROG L6996 TSSOP24 L6996DTR (Tape & Reel) V OUT 1.25V 1/26 ...
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L6996 ABSOLUTE MAXIMUM RATINGS Symbol GND GND DR DR HGATE and BOOT, to PHASE HGATE and BOOT, to PGND V PHASE PHASE LGATE to PGND ILIM, VFB+, VFB-, CS-, CS+, SHDN, VID0-4, ...
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PIN FUNCTIONS N Name 1,2,3, VID4-0 Voltage Identification inputs. VID0 is the LSB and VID4 is the MSB for the DAC (see VID table) 23,24 4 CS- This pin is used for both current sensing and to detect overvoltage and ...
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L6996 ELECTRICAL CHARACTERISTICS ( 5V 0°C to 70°C unless otherwise specified amb Symbol Parameter SUPPLY SECTION Vin Input voltage range Vcc Vccoff Turn-off voltage V UVLO Hysteresys HYST Iqcc Quiescent current ...
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ELECTRICAL CHARACTERISTICS (continued 5V 0°C to 70°C unless otherwise specified amb Symbol Parameter UVP Under voltage trip PGOOD Upper threshold (CS-/V ) PROG PGOOD Lower threshold (CS-/V ) PROG Ron P GOOD ...
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L6996 Figure 1. Functional & Block Diagram VCC 6/26 OSC CS- OSC CS- ...
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TYPICAL OPERATING CHARACTERISTICS The test conditions refer to the component list the table 5. V unless otherwise noted. Figure 2. Dynamic Output Voltage Transition 1.55V -> 1.35V Figure 3. Dynamic Output Voltage Transition 1.35V -> 1.55V Figure 4. Load Transient ...
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L6996 Figure 7. Test Condition 20V, V5v=5V 0.88 0.86 0.84 0.82 0.8 0.78 0.76 0.10 Figure 8. Test Condition 1.75V, F out 0.92 0.91 0.9 0.89 0.88 0.87 0.86 0.85 0.84 0.83 0.82 0.81 ...
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Figure 10. Typical Application with Active Voltage Droop V51 C V52 R R PU2 PU1 PGOOD OVP L6996 R IL1 ILIM R IL2 SHDN VID4:0 Figure 11. Typical Application without Active Voltage ...
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L6996 1 DEVICE DESCRIPTION 1.1 Constant On Time PWM Topology Figure 12. Loop block schematic diagram Vin R1 One-shot generator OSC CS- R2 VID0-4 Vprog VFB+ VFB- This device implements a Constant On Time control, where the Ton is the ...
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PWM comparator output is low (i.e. the output voltage is below the ref- erence voltage), the minimum off time is passed and the current limit comparator is not triggered (i.e. the induc- tor current is ...
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L6996 has an average value equal to Io. The intention is to find the output average value called Vo important to remember that the loop is closed a valley of the ripple, in this conditions the inputs of ...
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The transition from PFM to PWM occurs when load current is around half the inductor current ripple. This threshold value depends is, the smaller the threshold is. On the other hand, the ...
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L6996 To set the current threshold, choose AX_VAL LEY Where K is the current limit factor (0.25 A typ.). A negative current limit is also introduced during dynamic tran- C sitions, when zero-cross comparator is ...
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Q The low side driver has been designed to have a low resistance pull-down transistor, around 0.5 ohms. This prevents the voltage on LGATE pin raises during the fast rise-time of the pin ...
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L6996 2 APPLICATION INFORMATION 2.1 Demo board description The demoboard shows the device operation in general purpose applications. The evaluation board needs two different supplies; one for the IC section (5V), and another for the conversion section (up to 28V). ...
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Demoboard Layout Figure 17. PCB Board Layout - Layer one (Top component side) Figure 18. PCB Board Layout - Layer two (Internal Ground plane) Figure 19. PCB Board Layout - Layer three (Internal signal plane) Figure 20. PCB Board ...
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L6996 Table 2. PCB Layout guidelines Goal Low radiation and low magnetic coupling with the adjacent circuitry Don’t penalty the efficiency Ensure high accuracy in the current sense system Reduce the noise effects DESIGN EXAMPLES 3.1 V ...
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Considering 10uF capacitors ceramic, that have ICINRMS =1.5A, 6 pzs. are needed. 3.3 Inductor selection In order to determine the inductor value is necessary considering the maximum output current to decide the in- ductor current saturation. Once the inductor current ...
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L6996 3.5 Power MOSFET and Schottky Diodes Since a 5V bus powers the gate drivers of the device, the use of logic-level MOSFET is highly recommended, especially for high current applications. The breakdown voltage V certain margin, so the selection ...
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With our parameter 7.8pF VP1 No-load offset is obtained by R VP3 VP3 where OFFSET The capacitor C in parallel to R VP3 VP3 3.8 Input ...
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L6996 Table 3. Component List The component list is shared in two sections: the first for logic and general-purpose component, the second for power section: Part name Value R1, R2, R3, R4, R5, R6, 33k R7, R9, R18, R19, R24 ...
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... EEFUE0D271R PANASONIC Part number Manufacturer ETQP6F0R6BFA PANASONIC A959AS-R60N TOKO CEP12D38H-0R6 SUMIDA Part number Manufacturer STS11F3LL STMicroelectronics STSJ25NF3LL STMicroelectronics STS17NH3LL STMicroelectronics STS25NH3LL STMicroelectronics L6996 Notes 1% Notes 25V ceramic 25V ceramic 25V ceramic 35V ceramic 25V ceramic 25V ceramic Notes 2V 2V Notes Notes Q5 N.M . 23/26 ...
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... L6996 dissipate high power (for switching losses or conduction losses). POWER DIODES Part name Value D2 STPS2L25U This component must have low forward voltage and must have high reverse voltage (at least equal at the input voltage). 24/26 Part number Manufacturer STPS2L25U STMICROELECTRONICS Notes 25V ...
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DIM. MIN. TYP. MAX. MIN. A 1.20 A1 0.05 0.15 0.002 A2 0.80 1.00 1.05 0.031 b 0.19 0.30 0.007 c 0.09 0.20 0.003 D 7.70 7.80 7.90 0.303 E 6.40 E1 4.30 4.40 4.50 0.170 e 0.65 L ...
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... 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. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...