Datasheet LTC3541 (Analog Devices) - 4

LTC3541
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fOSC Oscillator Frequency l 1.8 2.25 2.7 MHz RPFET RDS(ON) of P-Channel MOSFET ISW = 100mA 0.25 Ω RNFET RDS(ON) of N-Channel MOSFET ISW = 100mA 0.35 Ω ILSW SW Leakage Enable = 0V, VSW = 0V or 6V, VIN = 6V ±0.01 ±1 μA VIH Input Pin High Threshold MODE, ENBUCK, ENVLDO l 0.9 V VIL Input Pin Low Threshold MODE, ENBUCK, ENVLDO l 0.3 V IMODE, Input Pin Current l ±0.01 ±1 μA IENBUCK, IENVLDO
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 6:
The LTC3541 is tested in a proprietary test mode that connects may cause permanent damage to the device. Exposure to any Absolute VBUCKFB to the output of the error amplifier. For the reference regulation Maximum Rating condition for extended periods may affect device and line regulation tests, the output of the error amplifier is set to the reliability and lifetime. midpoint. For the load regulation test, the output of the error amplifier is
Note 2:
The LTC3541 is guaranteed to meet performance specifications driven to minimum and maximum of the signal range. from 0°C to 85°C. VLDO/linear regulator output is tested and specified
Note 7:
Measurement made in closed loop linear regulator configuration under pulse load conditions such that TJ ≈ TA, and are 100% production with LVOUT = 1.2V, ILOAD = 10μA. tested at 25°C. Specifications over the –40°C to 85°C operating
Note 8:
Measurement made in a proprietary test mode with slope temperature range are assured by design, characterization and correlation compensation disabled. with statistical process controls.
Note 9:
Measurement is assured by design, characterization and statistical
Note 3:
Minimum operating LVIN voltage required for VLDO regulator process control. regulation is:
Note 10:
This IC includes overtemperature protection that is intended LVIN ≥ LVOUT + VDROPOUT and LVIN ≥ 0.9V to protect the device during momentary overload conditions. Junction
Note 4:
Minimum operating VIN voltage required for VLDO regulator and temperature will exceed 125°C when overtemperature protection is active. linear regulator regulation is: Continuous operation above the specified maximum operating junction V temperature may impair device reliability. IN ≥ LVOUT + 1.4V and VIN ≥ 2.7V
Note 5:
TJ is calculated from the ambient temperature, TA, and power dissipation, PD, according to the following formula: TJ = TA + (PD • 43°C/W) 3541fb 4 For more information www.linear.com/LTC3541 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information BUCK Regulator VLDO/Linear regulator Applications Information Efficiency Considerations Thermal Considerations Applications Information Pc Board Layout Checklist Design Example Typical Applications Package Description Revision History Related Parts