Datasheet LT3093 (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | –20V, 200mA, Ultralow Noise, Ultrahigh PSRR Negative Linear Regulator |
| Páginas / Página | 32 / 6 — ELECTRICAL CHARACTERISTICS. Note 1:. Note 8:. Note 9:. Note 10:. Note 2:. … |
| Formato / tamaño de archivo | PDF / 4.3 Mb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. Note 1:. Note 8:. Note 9:. Note 10:. Note 2:. Note 3:. Note 11:. Note 12:. Note 4:. Note 13:. Note 5:. Note 14:
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ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
The EN/UV pin threshold must be met to ensure device operation. may cause permanent damage to the device. Exposure to any Absolute
Note 9:
OUTS ties directly to OUT. Maximum Rating condition for extended periods may affect device
Note 10:
Dropout voltage is the minimum input-to-output differential reliability and lifetime. voltage needed to maintain regulation at a specified output current. The
Note 2:
Parasitic diodes exist internally between the EN/UV, ILIM, PG, dropout voltage is measured when output is 1% out of regulation. This PGFB, SET, GND, VIOC, OUTS and OUT pins and the IN pin. Do not drive definition results in a higher dropout voltage compared to hard dropout— these pins more than 0.3V below the IN pin during a fault condition. which is measured when VIN = VOUT(NOMINAL). For output voltages These pins must remain at a voltage more positive than IN during between 0V and –1.8V, dropout voltage is limited by the minimum input normal operation. voltage specification.
Note 3:
The LT3093 is tested and specified under pulse load conditions
Note 11:
GND pin current is tested with VIN = VOUT(NOMINAL) and a current such that TJ ≅ TA. The LT3093E is tested at TA = 25°C and performance source load. Therefore, the device is tested while operating in dropout. is guaranteed from 0°C to 125°C. Performance of the LT3093E over the This is the worst-case GND pin current. GND pin current decreases at full –40°C and 125°C operating temperature range is assured by design, higher input voltages. Note that GND pin current does not include SET pin characterization, and correlation with statistical process controls. The or ILIM pin current, but they are included in quiescent current. LT3093I is guaranteed over the full –40°C to 125°C operating junction
Note 12:
Adding a capacitor across the SET pin resistor decreases output temperature range. The LT3093H is 100% tested at the 150°C operating voltage noise. Adding this capacitor bypasses the SET pin resistor’s temperature. High junction temperatures degrade operating lifetimes. thermal noise as well as the reference current’s noise. The output noise Operating lifetime is derated at junction temperatures greater than 125°C. then equals the error amplifier noise. Use of a SET pin bypass capacitor
Note 4:
SET and OUTS pins are clamped using diodes and two 400Ω also increases start-up time. series resistors. For less than 5ms transients, this clamp circuitry can
Note 13:
The current limit programming scale factor is specified while the carry more than the rated current. internal backup current limit is not active. Note that the internal current
Note 5:
Maximum SET and OUTS pin current requirement must limit has foldback protection for VOUT – VIN differentials greater than 7V. be satisfied.
Note 14:
The internal backup current limit circuitry incorporates foldback
Note 6:
Maximum OUT-to-OUTS differential is guaranteed by design. protection that decreases current limit for VOUT – VIN > 7V. Some level of
Note 7:
Maximum junction temperature limits operating conditions. The output current is provided at all VOUT – VIN differential voltages. Consult the regulated output voltage specification does not apply for all possible Typical Performance Characteristics graph for current limit vs VIN – VOUT. combinations of input voltage and output current, especially due to the
Note 15:
The VIOC amplifier outputs a voltage equal to VIN – VOUT or VIN internal current limit foldback which starts to decrease current limit at + 1.5V (when VOUT is between 0V and –1.5V). See Block Diagram and VOUT – VIN > 7V. If operating at maximum output current, limit the input Applications Information for further information. voltage range. If operating at maximum input voltage, limit the output
Note 16:
For output voltages between 0V and –1.5V, the LT3093 requires current range. a 10µA minimum load current for stability. Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Application Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
The EN/UV pin threshold must be met to ensure device operation. may cause permanent damage to the device. Exposure to any Absolute
Note 9:
OUTS ties directly to OUT. Maximum Rating condition for extended periods may affect device
Note 10:
Dropout voltage is the minimum input-to-output differential reliability and lifetime. voltage needed to maintain regulation at a specified output current. The
Note 2:
Parasitic diodes exist internally between the EN/UV, ILIM, PG, dropout voltage is measured when output is 1% out of regulation. This PGFB, SET, GND, VIOC, OUTS and OUT pins and the IN pin. Do not drive definition results in a higher dropout voltage compared to hard dropout— these pins more than 0.3V below the IN pin during a fault condition. which is measured when VIN = VOUT(NOMINAL). For output voltages These pins must remain at a voltage more positive than IN during between 0V and –1.8V, dropout voltage is limited by the minimum input normal operation. voltage specification.
Note 3:
The LT3093 is tested and specified under pulse load conditions
Note 11:
GND pin current is tested with VIN = VOUT(NOMINAL) and a current such that TJ ≅ TA. The LT3093E is tested at TA = 25°C and performance source load. Therefore, the device is tested while operating in dropout. is guaranteed from 0°C to 125°C. Performance of the LT3093E over the This is the worst-case GND pin current. GND pin current decreases at full –40°C and 125°C operating temperature range is assured by design, higher input voltages. Note that GND pin current does not include SET pin characterization, and correlation with statistical process controls. The or ILIM pin current, but they are included in quiescent current. LT3093I is guaranteed over the full –40°C to 125°C operating junction
Note 12:
Adding a capacitor across the SET pin resistor decreases output temperature range. The LT3093H is 100% tested at the 150°C operating voltage noise. Adding this capacitor bypasses the SET pin resistor’s temperature. High junction temperatures degrade operating lifetimes. thermal noise as well as the reference current’s noise. The output noise Operating lifetime is derated at junction temperatures greater than 125°C. then equals the error amplifier noise. Use of a SET pin bypass capacitor
Note 4:
SET and OUTS pins are clamped using diodes and two 400Ω also increases start-up time. series resistors. For less than 5ms transients, this clamp circuitry can
Note 13:
The current limit programming scale factor is specified while the carry more than the rated current. internal backup current limit is not active. Note that the internal current
Note 5:
Maximum SET and OUTS pin current requirement must limit has foldback protection for VOUT – VIN differentials greater than 7V. be satisfied.
Note 14:
The internal backup current limit circuitry incorporates foldback
Note 6:
Maximum OUT-to-OUTS differential is guaranteed by design. protection that decreases current limit for VOUT – VIN > 7V. Some level of
Note 7:
Maximum junction temperature limits operating conditions. The output current is provided at all VOUT – VIN differential voltages. Consult the regulated output voltage specification does not apply for all possible Typical Performance Characteristics graph for current limit vs VIN – VOUT. combinations of input voltage and output current, especially due to the
Note 15:
The VIOC amplifier outputs a voltage equal to VIN – VOUT or VIN internal current limit foldback which starts to decrease current limit at + 1.5V (when VOUT is between 0V and –1.5V). See Block Diagram and VOUT – VIN > 7V. If operating at maximum output current, limit the input Applications Information for further information. voltage range. If operating at maximum input voltage, limit the output
Note 16:
For output voltages between 0V and –1.5V, the LT3093 requires current range. a 10µA minimum load current for stability. Rev. 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Application Package Description Typical Application Related Parts