link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 link to page 10 L6983Electrical characteristicsSymbolParameterTest conditionsMin.Typ.Max.Unit TSS Internal soft-start 1 1.3 1.6 ms Error amplifier Adjustable version 0.845 0.85 0.855 V TJ = 25 °C Adjustable version 0.842 0.85 0.858 V TJ = - 40 °C ≤ TJ ≤ 125 ° (4) Fixed 3.3 V version 3.27 3.3 3.33 V TJ = 25 °C VFB Voltage feedback Fixed 3.3 V version 3.284 3.3 3.346 V TJ = -40 °C ≤ TJ ≤ 125 °C (4) Fixed 5.0 V version 4.955 5.0 5.045 V TJ = 25 °C Fixed 5.0 V version 4.93 5 5.07 V TJ = -40 °C ≤ TJ ≤ 125 °C (4) Overvoltage protection V Overvoltage trip (VOVP/ OVP 115 120 125 % VREF) VOVP_HYST Overvoltage hysteresis 1 2 6 % Synchronization (LNM versions only) fCLKIN (3) Synchronization range 200 2200 kHz VCLKIN_TH (3) Amplitude of 2.3 V synchronization clock Synchronization pulse ON and OFF time 2.3 V VCLKIN_TH = 2.3 V 60 ns ≤ VCLKIN_TH ≤ 2.5 V VCLKIN_T (3) Synchronization pulse ON and OFF time 20 ns VCLKIN_TH > 2.5 V Power Good Adjustable output version 87 90 93 % TJ = -40 °C ≤ TJ ≤ 125 °C (4) Fixed 3.3 output version VTHR PGOOD threshold 87 90 93 % TJ = -40 °C ≤ TJ ≤ 125 °C (4) Fixed 5.0 output version 87 90 93 % TJ = -40 °C ≤ TJ ≤ 125 °C (4) VTHR_HYST (4) PGOOD hysteresis 3 VIN > VIN_H AND VFB < VTH 0.4 V V PGOOD open collector PGOOD 4 mA sinking load output 2 < VIN < VIN_H 0.8 V 4 mA sinking load DS13116 - Rev 1page 9/63 Document Outline 1 Diagram 2 Pin configuration 3 Typical application circuit 4 Absolute maximum ratings 4.1 ESD protection 4.2 Thermal characteristics 5 Electrical characteristics 5.1 Frequency selection table 6 Functional description 6.1 Enable 6.2 Soft-start 6.3 Undervoltage lockout 6.4 Light-load operation 6.4.1 Low consumption mode (LCM) 6.4.2 Low noise mode (LNM) 6.4.3 Efficiency for low consumption mode and low noise mode part number 6.4.4 Load regulation for low consumption mode and Low noise mode part number 6.5 Switch-over feature 6.6 Spread spectrum 6.7 Overvoltage protection 6.8 Overcurrent protection 6.9 Thermal shutdown 6.10 Power Good 7 Closing the loop 7.1 GCO(s) control to output transfer function 7.2 Error amplifier compensation network 7.3 Voltage divider 8 Application notes 8.1 Programmable power up threshold 8.2 External synchronization (available for low noise mode only) 8.3 Output voltage adjustment 8.4 Switching frequency 8.5 Design of the power components 8.5.1 Input capacitor selection 8.5.2 Inductor selection 8.5.3 Output capacitor selection 9 Application board 10 Efficiency curves 11 Thermal dissipation 12 Package information 12.1 QFN16 (3x3 mm) package information 13 Ordering information Revision history
