Datasheet LTC1701, LTC1701B (Analog Devices) - 2

LTC1701/LTC1701B
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
ORDER PART (Voltages Referred to GND Pin) TOP VIEW NUMBER VIN Voltage (Pin 5)...– 0.3V to 6V SW 1 5 V I IN TH/RUN Voltage (Pin 4) .. – 0.3V to 3V GND 2 LTC1701ES5 VFB Voltage (Pin 3) ..– 0.3V to 3V VFB 3 4 ITH/RUN LTC1701BES5 VIN – SW (Max Switch Voltage) ..8.5V to –0.3V S5 PACKAGE Operating Temperature Range (Note 2) .. – 40°C to 85°C 5-LEAD PLASTIC SOT-23 S5 PART Junction Temperature (Note 5) ... 125°C MARKING TJMAX = 125°C, θJA = 250°C/W Storage Temperature Range ... – 65°C to 150°C SEE THE APPLICATION LTKG Lead Temperature (Soldering, 10 sec).. 300°C INFORMATION SECTION LTUD Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 3.3V, RITH/RUN = 1Meg (from VIN to ITH/RUN) unless otherwise specified. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage Range 2.5 5.5 V IFB Feedback Pin Input Current (Note 3) ±0.1 µA VFB Feedback Voltage (Note 3) ● 1.22 1.25 1.28 V ∆VLINE REG Reference Voltage Line Regulation VIN = 2.5V to 5V (Note 3) 0.04 0.1 %/V ∆VLOAD REG Output Voltage Load Regulation Measured in Servo Loop, VITH = 1.5V, (Note 3) 0.01 0.70 % Measured in Servo Loop, VITH = 1.9V, (Note 3) – 0.80 –1.50 % Input DC Supply Current (Note 4) Active Mode VFB = 0V 185 300 µA Sleep Mode VFB = 1.4V (LTC1701 only) 135 200 µA Shutdown VITH/RUN = 0V 0.25 1 µA VITH/RUN Run Threshold High ITH/RUN Ramping Down 1.4 1.6 V Run Threshold Low ITH/RUN Ramping Up 0.3 0.6 V IITH/RUN Run Pullup Current VITH/RUN = 1V 50 100 300 µA ISW(PEAK) Peak Switch Current Threshold VFB = 0V 0.9 1.1 A RDS(ON) Switch ON Resistance VIN = 5V, VFB = 0V 0.28 Ω VIN = 3.3V, VFB = 0V 0.30 Ω VIN = 2.5V, VFB = 0V 0.35 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VITH/RUN = 0V, VFB = 0V 0.01 1 µA tOFF Switch Off-Time 400 500 600 ns
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
The LTC1701/LTC1701B are tested in a feedback loop which of a device may be impaired. servos VFB to the midpoint for the error amplifier without RITH/RUN = 1MHz
Note 2:
The LTC1701E/LTC1701BE guaranteed to meet performance (VITH = 1.7V unless otherwise specified). specifications from 0°C to 70°C. Specifications over the – 40°C to 85°C
Note 4:
Dynamic supply current is higher due to the internal gate charge operating temperature range are assured by design, characterization and being delivered at the switching frequency. correlation with statistical process controls.
Note 5:
TJ is calculated from the ambient TA and power dissipation PD according to the following formula: LTC1701ES5/LTC1701BES5: TJ = TA + (PD • 250°C/W) 2