Datasheet L6983 (STMicroelectronics) - 10
| 制造商 | STMicroelectronics |
| 描述 | 38 V 3A synchronous step-down converter with 17uA quiescent current |
| 页数 / 页 | 63 / 10 — L6983. Frequency selection table. Symbol. Parameter. Test conditions. … |
| 文件格式/大小 | PDF / 5.1 Mb |
| 文件语言 | 英语 |
L6983. Frequency selection table. Symbol. Parameter. Test conditions. Min. Typ. Max. Unit. 5.1. Table 7. FSW selection. Option. RVCC (kΩ)
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L6983 Frequency selection table Symbol Parameter Test conditions Min. Typ. Max. Unit
TSHDWN (5) Thermal shutdown 165 °C temperature THYS (5) Thermal shutdown 30 °C hysteresis 1. Parameter tested in the static condition during testing phase. The parameter value may change over a dynamic application condition. 2. LCM version. 3. LNM version. 4. Specifications in the - 40 to 125 °C temperature range are assured by characterization and statistical correlation. 5. Not tested in production.
5.1 Frequency selection table
Specification referred to - 40 ≤ TJ ≤ 125 °C and VIN = 24 V, assured by testing at TJ = 25 °C, design, characterization and statistical correlation.
Table 7. FSW selection Symbol Option RVCC (kΩ) RGND (kΩ) Min. Typ. Max. Unit
1.8 N.C. 200 kHz 0 N.C. 400 kHz 3.3 N.C. 500 kHz 5.6 N.C. 700 kHz Dithering (5 % FSW typ.) 10 N.C. 1000 kHz 18 N.C. 1500 kHz 33 N.C. 2000 kHz 56 N.C. 2300 kHz FSW N.C. 1.8 200 kHz N.C. 0 360 400 440 kHz N.C. 3.3 500 kHz N.C. 5.6 630 700 770 kHz No dithering N.C. 10 900 1000 1100 kHz N.C. 18 1500 kHz N.C. 33 2000 kHz N.C. 56 2000 2300 2600 kHz
DS13116
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Rev 1 page 10/63
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
L6983 Frequency selection table Symbol Parameter Test conditions Min. Typ. Max. Unit
TSHDWN (5) Thermal shutdown 165 °C temperature THYS (5) Thermal shutdown 30 °C hysteresis 1. Parameter tested in the static condition during testing phase. The parameter value may change over a dynamic application condition. 2. LCM version. 3. LNM version. 4. Specifications in the - 40 to 125 °C temperature range are assured by characterization and statistical correlation. 5. Not tested in production.
5.1 Frequency selection table
Specification referred to - 40 ≤ TJ ≤ 125 °C and VIN = 24 V, assured by testing at TJ = 25 °C, design, characterization and statistical correlation.
Table 7. FSW selection Symbol Option RVCC (kΩ) RGND (kΩ) Min. Typ. Max. Unit
1.8 N.C. 200 kHz 0 N.C. 400 kHz 3.3 N.C. 500 kHz 5.6 N.C. 700 kHz Dithering (5 % FSW typ.) 10 N.C. 1000 kHz 18 N.C. 1500 kHz 33 N.C. 2000 kHz 56 N.C. 2300 kHz FSW N.C. 1.8 200 kHz N.C. 0 360 400 440 kHz N.C. 3.3 500 kHz N.C. 5.6 630 700 770 kHz No dithering N.C. 10 900 1000 1100 kHz N.C. 18 1500 kHz N.C. 33 2000 kHz N.C. 56 2000 2300 2600 kHz
DS13116
-
Rev 1 page 10/63
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