Datasheet LTC3823 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Fast No RSENSE Step-Down Synchronous DC/DC Controller with Differential Output Sensing, Tracking and PLL |
| Seiten / Seite | 26 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| Dateiformat / Größe | PDF / 315 Kb |
| Dokumentensprache | Englisch |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LTC3823
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 15V unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS PGOOD Output
ΔVFBH PGOOD Upper Threshold VFB Rising 8 11 14 % ΔVFBL PGOOD Lower Threshold VFB Falling –8 –11 –14 % ΔVFB(HYS) PGOOD Hysteresis VFB Returning 1.5 3 % VPGL PGOOD Low Voltage IPGOOD = 5mA 0.15 0.4 V
Differential Sensing Amplifi er
ADA Gain l 0.9965 1.000 1.0035 V/V R + IN Input Resistance Measured at VOUTSENSE Input 80 kΩ V + OS Input Offset Voltage VOUTSENSE = VDIFFOUT = 1.5V, 2 mV IDIFFOUT = 1mA PSRROA Power Supply Rejection Ratio 6V < VIN < 30V 90 dB ICL Maximum Output Current 3 mA VOUT(MAX) Maximum Output Voltage IDIFFOUT = 300μA l 3.775 4 V GBW Gain Bandwidth Product IDIFFOUT = 1mA 3.5 MHz
Thermal Shutdown
TSD Shutdown Temperature Rising 170 °C THYST Thermal Hysteresis 15 °C
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3823 is tested in a feedback loop that servos VFB to may cause permanent damage to the device. Exposure to any Absolute achieve a specifi ed error amplifi er output voltage (ITH). Maximum Rating condition for extended periods may affect device
Note 4:
The LTC3823E is guaranteed to meet performance specifi cations reliability and lifetime. from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
Note 2:
TJ is calculated from the ambient temperature TA and power temperature range are assured by design, characterization and correlation dissipation PD according to the following formulas: with statistical process controls. The LTC3823I is guaranteed over the full LTC3823GN: T –40°C to 85°C operating temperature range. J = TA + (PD • 80°C/W) LTC3823UH: TJ = TA + (PD • 34°C/W)
TYPICAL PERFORMANCE CHARACTERISTICS Current Sense Threshold vs ITH Voltage On-Time vs ION Current On-Time vs VON Voltage
300 10000 800 V V I RNG = 2V ON = 0V ION = 60μA 250 700 1.4V 200 600 1V 150 1000 0.7V 500 100 400 50 0.5V ON-TIME (ns) ON-TIME (ns) 300 0 100 200 –50 CURRENT SENSE THRESHOLD (mV) –100 100 –150 10 0 0 0.5 1 1.5 2 2.5 0 10 20 30 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 ITH VOLTAGE (V) ION CURRENT (μA) VON VOLTAGE (V) 2823 G01 3823 G02 3823 G03 3823fd 4
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 15V unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS PGOOD Output
ΔVFBH PGOOD Upper Threshold VFB Rising 8 11 14 % ΔVFBL PGOOD Lower Threshold VFB Falling –8 –11 –14 % ΔVFB(HYS) PGOOD Hysteresis VFB Returning 1.5 3 % VPGL PGOOD Low Voltage IPGOOD = 5mA 0.15 0.4 V
Differential Sensing Amplifi er
ADA Gain l 0.9965 1.000 1.0035 V/V R + IN Input Resistance Measured at VOUTSENSE Input 80 kΩ V + OS Input Offset Voltage VOUTSENSE = VDIFFOUT = 1.5V, 2 mV IDIFFOUT = 1mA PSRROA Power Supply Rejection Ratio 6V < VIN < 30V 90 dB ICL Maximum Output Current 3 mA VOUT(MAX) Maximum Output Voltage IDIFFOUT = 300μA l 3.775 4 V GBW Gain Bandwidth Product IDIFFOUT = 1mA 3.5 MHz
Thermal Shutdown
TSD Shutdown Temperature Rising 170 °C THYST Thermal Hysteresis 15 °C
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
The LTC3823 is tested in a feedback loop that servos VFB to may cause permanent damage to the device. Exposure to any Absolute achieve a specifi ed error amplifi er output voltage (ITH). Maximum Rating condition for extended periods may affect device
Note 4:
The LTC3823E is guaranteed to meet performance specifi cations reliability and lifetime. from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
Note 2:
TJ is calculated from the ambient temperature TA and power temperature range are assured by design, characterization and correlation dissipation PD according to the following formulas: with statistical process controls. The LTC3823I is guaranteed over the full LTC3823GN: T –40°C to 85°C operating temperature range. J = TA + (PD • 80°C/W) LTC3823UH: TJ = TA + (PD • 34°C/W)
TYPICAL PERFORMANCE CHARACTERISTICS Current Sense Threshold vs ITH Voltage On-Time vs ION Current On-Time vs VON Voltage
300 10000 800 V V I RNG = 2V ON = 0V ION = 60μA 250 700 1.4V 200 600 1V 150 1000 0.7V 500 100 400 50 0.5V ON-TIME (ns) ON-TIME (ns) 300 0 100 200 –50 CURRENT SENSE THRESHOLD (mV) –100 100 –150 10 0 0 0.5 1 1.5 2 2.5 0 10 20 30 40 50 60 70 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 ITH VOLTAGE (V) ION CURRENT (μA) VON VOLTAGE (V) 2823 G01 3823 G02 3823 G03 3823fd 4