Datasheet ADP3050 (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | 200 kHz, 1 A Step-Down High-Voltage Switching Regulator |
| Páginas / Página | 20 / 3 — Data Sheet. ADP3050. SPECIFICATIONS. Table 1. Parameter. Symbol. … |
| Revisión | C |
| Formato / tamaño de archivo | PDF / 356 Kb |
| Idioma del documento | Inglés |
Data Sheet. ADP3050. SPECIFICATIONS. Table 1. Parameter. Symbol. Conditions. Min. Typ. Max. Unit
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Data Sheet ADP3050 SPECIFICATIONS
VIN = 10 V, TA = −40°C to +85°C, unless otherwise noted.
Table 1. Parameter
1
Symbol Conditions Min Typ Max Unit
FEEDBACK Feedback Voltage VFB Over line and temperature ADP3050 1.16 1.20 1.24 V ADP3050-3.3 3.20 3.30 3.40 V ADP3050-5 4.85 5.00 5.15 V Line Regulation VIN = 10 V to 30 V, no load 0.005 %/V Load Regulation ILOAD = 100 mA to 1 A, ADP3050AR only −1.0 +0.1 +1.0 %/A ADP3050AR-3.3, ADP3050AR-5 −0.5 +0.1 +0.5 %/A Input Bias Current IFB ADP3050AR only 0.65 2 μA ERROR AMPLIFIER Transconductance2 gm 1250 μMho Voltage Gain2 AVOL 300 V/V Output Current ADP3050 COMP = 1.0 V, FB = 1.1 V to 1.3 V ±115 μA ADP3050-3.3 COMP = 1.0 V, FB = 3.0 V to 3.6 V ±120 μA ADP3050-5 COMP = 1.0 V, FB = 4.5 V to 5.5 V ±135 μA OSCILLATOR Oscillator Frequency3 fOSC 170 200 240 kHz Minimum Duty Cycle DMIN 10 % Maximum Duty Cycle DMAX 90 % SWITCH Average Output Current Limit4 ICL(AVG) ADP3050 BOOST = 15 V, FB = 1.1 V 1.0 1.25 1.5 A ADP3050-3.3 BOOST = 15 V, FB = 3.0 V 1.0 1.25 1.5 A ADP3050-5 BOOST = 15 V, FB = 4.5 V 1.0 1.25 1.5 A Peak Switch Current Limit5 ICL(PEAK) 1.5 1.7 2.1 A Saturation Voltage BOOST = 15 V, ILOAD = 1 A 0.65 0.95 V Leakage Current 50 nA SHUTDOWN Input Voltage Low 0.4 V Input Voltage High 2.0 V SUPPLY Input Voltage Range6 VIN 3.6 30 V Minimum BIAS Voltage VBIAS 3.0 V Minimum BOOST Voltage VBOOST 3.0 V IN Supply Current IQ Normal Mode BIAS = 5.0 V 0.7 1.5 mA Shutdown Mode SD = 0 V, VIN ≤ 30 V 15 40 μA BIAS Supply Current IBIAS BIAS = 5.0 V 4.0 6.0 mA BOOST Supply Current IBOOST BOOST = 15 V, ISW = 0.5 A 18 mA BOOST = 15 V, ISW = 1.0 A 20 40 mA 1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). 2 Transconductance and voltage gain measurements refer to the internal amplifier without the voltage divider. To calculate the transconductance and gain of the fixed voltage parts, divide the values shown by FB/1.20. 3 The switching frequency is reduced when the feedback pin is lower than 0.8 × FB. 4 See Figure 24 for typical application circuit. 5 Switch current limit is measured with no diode, no inductor, and no output capacitor. 6 Minimum input voltage is not measured directly, but is guaranteed by other tests. The actual minimum input voltage needed to keep the output in regulation depends on output voltage and load current. Rev. C | Page 3 of 20 Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Setting the Output Voltage Applications Information ADIsimPower Design Tool Inductor Selection Continuous Mode Discontinuous Mode Inductor Core Types and Materials Choosing an Inductor Output Capacitor Selection Choosing an Output Capacitor Catch Diode Selection Choosing a Catch Diode Input Capacitor Selection Discontinous Mode Ringing Setting the Output Voltage Frequency Compensation Current Limit/Frequency Foldback Bias Pin Connection Boosted Drive Stage Start-Up/Minimum Input Voltage Thermal Considerations Board Layout Guidelines Typical Applications 5 V to 3.3 V Buck (Step-Down) Regulator Inverting (Buck Boost) Regulator Dual Output SEPIC Regulator Outline Dimensions Ordering Guide
Data Sheet ADP3050 SPECIFICATIONS
VIN = 10 V, TA = −40°C to +85°C, unless otherwise noted.
Table 1. Parameter
1
Symbol Conditions Min Typ Max Unit
FEEDBACK Feedback Voltage VFB Over line and temperature ADP3050 1.16 1.20 1.24 V ADP3050-3.3 3.20 3.30 3.40 V ADP3050-5 4.85 5.00 5.15 V Line Regulation VIN = 10 V to 30 V, no load 0.005 %/V Load Regulation ILOAD = 100 mA to 1 A, ADP3050AR only −1.0 +0.1 +1.0 %/A ADP3050AR-3.3, ADP3050AR-5 −0.5 +0.1 +0.5 %/A Input Bias Current IFB ADP3050AR only 0.65 2 μA ERROR AMPLIFIER Transconductance2 gm 1250 μMho Voltage Gain2 AVOL 300 V/V Output Current ADP3050 COMP = 1.0 V, FB = 1.1 V to 1.3 V ±115 μA ADP3050-3.3 COMP = 1.0 V, FB = 3.0 V to 3.6 V ±120 μA ADP3050-5 COMP = 1.0 V, FB = 4.5 V to 5.5 V ±135 μA OSCILLATOR Oscillator Frequency3 fOSC 170 200 240 kHz Minimum Duty Cycle DMIN 10 % Maximum Duty Cycle DMAX 90 % SWITCH Average Output Current Limit4 ICL(AVG) ADP3050 BOOST = 15 V, FB = 1.1 V 1.0 1.25 1.5 A ADP3050-3.3 BOOST = 15 V, FB = 3.0 V 1.0 1.25 1.5 A ADP3050-5 BOOST = 15 V, FB = 4.5 V 1.0 1.25 1.5 A Peak Switch Current Limit5 ICL(PEAK) 1.5 1.7 2.1 A Saturation Voltage BOOST = 15 V, ILOAD = 1 A 0.65 0.95 V Leakage Current 50 nA SHUTDOWN Input Voltage Low 0.4 V Input Voltage High 2.0 V SUPPLY Input Voltage Range6 VIN 3.6 30 V Minimum BIAS Voltage VBIAS 3.0 V Minimum BOOST Voltage VBOOST 3.0 V IN Supply Current IQ Normal Mode BIAS = 5.0 V 0.7 1.5 mA Shutdown Mode SD = 0 V, VIN ≤ 30 V 15 40 μA BIAS Supply Current IBIAS BIAS = 5.0 V 4.0 6.0 mA BOOST Supply Current IBOOST BOOST = 15 V, ISW = 0.5 A 18 mA BOOST = 15 V, ISW = 1.0 A 20 40 mA 1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). 2 Transconductance and voltage gain measurements refer to the internal amplifier without the voltage divider. To calculate the transconductance and gain of the fixed voltage parts, divide the values shown by FB/1.20. 3 The switching frequency is reduced when the feedback pin is lower than 0.8 × FB. 4 See Figure 24 for typical application circuit. 5 Switch current limit is measured with no diode, no inductor, and no output capacitor. 6 Minimum input voltage is not measured directly, but is guaranteed by other tests. The actual minimum input voltage needed to keep the output in regulation depends on output voltage and load current. Rev. C | Page 3 of 20 Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Setting the Output Voltage Applications Information ADIsimPower Design Tool Inductor Selection Continuous Mode Discontinuous Mode Inductor Core Types and Materials Choosing an Inductor Output Capacitor Selection Choosing an Output Capacitor Catch Diode Selection Choosing a Catch Diode Input Capacitor Selection Discontinous Mode Ringing Setting the Output Voltage Frequency Compensation Current Limit/Frequency Foldback Bias Pin Connection Boosted Drive Stage Start-Up/Minimum Input Voltage Thermal Considerations Board Layout Guidelines Typical Applications 5 V to 3.3 V Buck (Step-Down) Regulator Inverting (Buck Boost) Regulator Dual Output SEPIC Regulator Outline Dimensions Ordering Guide