Datasheet LT3500 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
| Páginas / Página | 28 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| Formato / tamaño de archivo | PDF / 331 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LT3500
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TJ = 25°C. VVIN = 15V, VRT/SYNC = 2V, unless otherwise specifi ed. PARAMETER CONDITIONS MIN TYP MAX UNITS
LFB Voltage VLDRV = VLFB l 0.784 0.8 0.816 V LFB Line/Load Regulation VVIN = 3V to 40V, VLDRV = VLFB l 0.776 0.8 0.824 V SS to LFB Offset (VSS – VLFB) VSS = 0.8V, VLDRV = VLFB 90 115 140 mV LFB Bias Current VLFB = 0.8V 115 300 nA LDRV Dropout (VVIN – VLDRV) VLDRV = 3V, ILDRV = 5mA l 0.8 1.2 1.6 V LDRV Maximum Current VLDRV = 0V l 9 13 18 mA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings will depend upon output voltage and load current. See Applications may cause permanent damage to the device. Exposure to any Absolute Information. Maximum Rating condition for extended periods may affect device
Note 4:
An internal power-on reset (POR) latch is set on the positive reliability and lifetime. transition of the SHDN pin through its threshold. The output of the latch
Note2:
The LT3500EDD/LT3500EMSE is guaranteed to meet performance activates a current source on the SS pin which typically sinks 600μA, specifi cations from 0°C to 125°C junction temperature. Specifi cations over discharging the SS capacitor. The latch is reset when the SS pin is driven the –40°C to 125°C operating junction temperature range are assured by below the soft-start POR threshold or the SHDN pin is taken below its design, characterization and correlation with statistical process controls. threshold. The LT3500IDD/LT3500IMSE is guaranteed over the full –40°C to 125°C
Note 5:
This is the minimum voltage across the boost capacitor needed to operating junction temperature range. The LT3500HDD/LT3500HMSE is guarantee full saturation of the internal power switch. guaranteed over the full –40°C to 150°C operating junction temperature
Note 6:
This IC includes overtemperature protection that is intended range. High junction temperatures degrade operating lifetimes. Operating to protect the device during momentary overload conditions. Junction lifetime is derated at junction temperatures greater than 125°C. temperature will exceed the maximum operating junction temperature
Note 3:
Minimum input voltage is defi ned as the voltage where internal when overtemperature protection is active. Continuous operation above bias lines are regulated so that the reference voltage and oscillator remain the specifi ed maximum operating junction temperature may impair device constant. Actual minimum input voltage to maintain a regulated output reliability.
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Threshold and Minimum Feedback Voltage vs Temperature RT/SYNC Voltage vs Temperature Input Voltage vs Temperature
0.820 1.10 3.0 1.08 0.815 MINIMUM INPUT VOLTAGE 1.06 2.5 0.810 RRT/SYNC = 90.9k 1.04 2.0 0.805 1.02 FB 1.00 TAGE (V) 0.800 1.5 VOL LFB 0.98 0.795 VOLTAGE (V) VOLTAGE (V) 0.96 1.0 SHUTDOWN THRESHOLD 0.790 RRT/SYNC = 15k 0.94 0.5 0.785 0.92 0.780 0.90 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3500 G01 3500 G02 3500 G03 3500fc 4
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TJ = 25°C. VVIN = 15V, VRT/SYNC = 2V, unless otherwise specifi ed. PARAMETER CONDITIONS MIN TYP MAX UNITS
LFB Voltage VLDRV = VLFB l 0.784 0.8 0.816 V LFB Line/Load Regulation VVIN = 3V to 40V, VLDRV = VLFB l 0.776 0.8 0.824 V SS to LFB Offset (VSS – VLFB) VSS = 0.8V, VLDRV = VLFB 90 115 140 mV LFB Bias Current VLFB = 0.8V 115 300 nA LDRV Dropout (VVIN – VLDRV) VLDRV = 3V, ILDRV = 5mA l 0.8 1.2 1.6 V LDRV Maximum Current VLDRV = 0V l 9 13 18 mA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings will depend upon output voltage and load current. See Applications may cause permanent damage to the device. Exposure to any Absolute Information. Maximum Rating condition for extended periods may affect device
Note 4:
An internal power-on reset (POR) latch is set on the positive reliability and lifetime. transition of the SHDN pin through its threshold. The output of the latch
Note2:
The LT3500EDD/LT3500EMSE is guaranteed to meet performance activates a current source on the SS pin which typically sinks 600μA, specifi cations from 0°C to 125°C junction temperature. Specifi cations over discharging the SS capacitor. The latch is reset when the SS pin is driven the –40°C to 125°C operating junction temperature range are assured by below the soft-start POR threshold or the SHDN pin is taken below its design, characterization and correlation with statistical process controls. threshold. The LT3500IDD/LT3500IMSE is guaranteed over the full –40°C to 125°C
Note 5:
This is the minimum voltage across the boost capacitor needed to operating junction temperature range. The LT3500HDD/LT3500HMSE is guarantee full saturation of the internal power switch. guaranteed over the full –40°C to 150°C operating junction temperature
Note 6:
This IC includes overtemperature protection that is intended range. High junction temperatures degrade operating lifetimes. Operating to protect the device during momentary overload conditions. Junction lifetime is derated at junction temperatures greater than 125°C. temperature will exceed the maximum operating junction temperature
Note 3:
Minimum input voltage is defi ned as the voltage where internal when overtemperature protection is active. Continuous operation above bias lines are regulated so that the reference voltage and oscillator remain the specifi ed maximum operating junction temperature may impair device constant. Actual minimum input voltage to maintain a regulated output reliability.
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Threshold and Minimum Feedback Voltage vs Temperature RT/SYNC Voltage vs Temperature Input Voltage vs Temperature
0.820 1.10 3.0 1.08 0.815 MINIMUM INPUT VOLTAGE 1.06 2.5 0.810 RRT/SYNC = 90.9k 1.04 2.0 0.805 1.02 FB 1.00 TAGE (V) 0.800 1.5 VOL LFB 0.98 0.795 VOLTAGE (V) VOLTAGE (V) 0.96 1.0 SHUTDOWN THRESHOLD 0.790 RRT/SYNC = 15k 0.94 0.5 0.785 0.92 0.780 0.90 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3500 G01 3500 G02 3500 G03 3500fc 4