Datasheet LT3510 (Analog Devices) - 4

LT3510
ELECTRICAL CHARACTERISTICS
LT3510IFE is guaranteed and tested over the full –40°C to 125°C operating
Note 5:
To enhance dropout operation, the output switch will be turned off junction temperature range. for the minimum off time only when the voltage across the boost capacitor
Note 3:
Minimum input voltage is defi ned as the voltage where internal drops below the minimum boost for 100% duty cycle threshold. bias lines are regulated so that the reference voltage and oscillator remain
Note 6:
The IND to VOUT maximum current is defi ned as the value of constant. Actual minimum input voltage to maintain a regulated output current fl owing from the IND pin to the VOUT pin which resets the switch will depend upon output voltage and load current. See Applications latch when the VC pin is at its high clamp. Information.
Note 7:
This is the minimum voltage across the boost capacitor needed to
Note 4:
An internal power-on reset (POR) latch is set on the positive guarantee full saturation of the internal power switch. transition of the SHDN pin through its threshold. The output of the latch
Note 8:
This IC includes overtemperature protection that is intended activates current sources on each SS pin which typically sink 1.5mA, to protect the device during momentary overload conditions. Junction discharging the SS capacitor. The latch is reset when both SS pins are temperature will exceed 125°C when overtemperature protection is active. driven below the soft-start POR threshold or the SHDN pin is taken below Continuous operation above the specifi ed maximum operating junction its threshold. temperature may impair device reliability.
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Threshold and Minimum Feedback Voltage vs Temperature RT/SYNC Voltage vs Temperature Input Voltage vs Temperature
0.816 1.05 3.0 0.811 2.5 MINIMUM INPUT 1.03 VOLTAGE 0.806 2.0 1.01 SHUTDOWN THRESHOLD 0.801 1.5 VOLTAGE VOLTAGE (V) VOLTAGE (V) 0.99 VOLTAGE (V) 0.796 1.0 0.97 0.791 0.5 0.786 0.95 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3510 G02 3510 G03 3510 G04
Shutdown Quiescent Current Soft-Start Source Current IND to VOUT Maximum Current vs vs Temperature vs Temperature Temperature
16 4.0 4.0 3.8 3.8 14 VVIN1 3.6 3.6 12 3.4 3.4 10 A) μ 3.2 3.2 8 3.0 3.0 VOUT = 5V 2.8 2.8 CURRENT (μA) 6 CURRENT ( CURRENT (A) 2.6 2.6 VOUT = 0V 4 2.4 2.4 2 V 2.2 2.2 VIN2 0 2.0 2.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –30 –10 10 30 50 70 90 110 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3510 G05 3510 G07 3510 G30 3510fe 4 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY RELATED PARTS