Datasheet LT6650 (Analog Devices) - 3

LT6650
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 5V, CIN = 1
µ
F, FB = OUT, no DC load, CL = 1
µ
F, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
TC Output Voltage Temperature ● 30 ppm/°C Coefficient (Note 10) ∆VDO Dropout Voltage (Note 7) Referred to VIN = 1.8V, VOUT = 1.4V (RF = 100k, RG = 39.2k) ∆VOUT = –0.1%, IOUT = 0µA 75 100 mV ● 150 mV ∆VOUT = –0.1%, IOUT = –200µA Sourcing 165 250 mV ● 350 mV ∆VOUT = –0.1%, IOUT = 200µA Sinking (Note 11) –300 –150 mV ● 0 mV ISC Short-Circuit Output Current VOUT Shorted to GND 5 mA VOUT Shorted to VIN 9 mA IIN Supply Current 5.6 11 µA ● 14 µA VIN = 18V 5.9 12 µA ● 15 µA IFB FB Pin Input Current VFB = VOUT = 400mV 1.2 10 nA LT6650CS5, LT6650IS5 ● 15 nA LT6650HS5 ● 30 nA TON Turn-On Time CLOAD = 1µF 0.5 ms en Output Noise (Note 8) 0.1Hz ≤ ƒ ≤ 10Hz 20 µVP-P 10Hz ≤ ƒ ≤ 1KHz, IOUT = –200µA Sourcing 23 µVRMS VHYS Hysteresis (Note 9) ∆T = 0°C to 70°C ● 0.1 mV ● 250 ppm ∆T = –40°C to 85°C ● 0.24 mV ● 600 ppm
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 6:
Load regulation is measured on a pulse basis from no load to the of a device may be impaired. specified load current. Output changes due to die temperature change
Note 2:
The FB pin is protected by an ESD diode to the ground. If the FB must be taken into account separately. input voltage exceeds –0.3V below ground, the FB input current should be
Note 7:
Dropout Voltage is (VIN – VOUT) when VOUT falls to 0.1% below its limited to less than 10mA. If the FB input voltage is greater than 5V, the FB nominal value at VIN = 1.8V. input current is expected to meet specified performance from Typical
Note 8:
Peak-to-Peak noise is measured with a single pole highpass filter Performance Characteristics but is not tested or QA sampled at this at 0.1Hz and a 2-pole lowpass filter at 10Hz. The unit is enclosed in a still voltage. air environment to eliminate thermocouple effects on the leads. The test
Note 3:
If the part is operating at temperatures above 85°C, it is time is 10 seconds. recommended to enhance the stability margin by using an output
Note 9:
Hysteresis in the output voltage is created by package stress that capacitor greater than 10µF or a series RC combination having a 100µs differs depending on whether the IC was previously at a higher or lower equivalent time constant. See Application section for details. temperature. Output voltage is always measured at 25°C, but the IC is
Note 4:
If the part is stored outside of the specified temperature range, the cycled to 85°C or –40°C before a successive measurement. Hysteresis is output voltage may shift due to hysteresis. roughly proportional to the square of the temperature change.
Note 5:
ESD (Electrostatic Discharge) sensitive devices. Extensive use of
Note 10:
Temperature coefficient is measured by dividing the change in ESD protection devices are used internal to the LT6650; however, high output voltage by the specified temperature range. electrostatic discharge can damage or degrade the device. Use proper ESD
Note 11:
This feature guarantees the shunt mode operation of the device. handling precautions. 6650fa 3