Datasheet ADP1874, ADP1875 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | Synchronous Buck Controller with Constant On-Time, Valley Current Mode, and Power Saving Mode |
| Páginas / Página | 44 / 5 — Data Sheet. ADP1874/ADP1875. Parameter. Symbol. Test Conditions/Comments. … |
| Revisión | A |
| Formato / tamaño de archivo | PDF / 1.8 Mb |
| Idioma del documento | Inglés |
Data Sheet. ADP1874/ADP1875. Parameter. Symbol. Test Conditions/Comments. Min. Typ. Max. Unit
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Data Sheet ADP1874/ADP1875 Parameter Symbol Test Conditions/Comments Min Typ Max Unit
TRACKING Track Input Voltage Range 0 5 V FB-to-Tracking Offset Voltage 0.5 V < TRACK < 0.6 V, offset = V − V 63 mV FB TRACK Leakage Current V = 5 V 1 50 nA TRACK 1 The maximum specified values are with the closed loop measured at 10% to 90% time points (see Figure 59 and Figure 60), CGATE = 4.3 nF, and the upper side and lower side MOSFETs being Infineon BSC042N03MS G. 2 Guaranteed by design. 3 Not automatic test equipment (ATE) tested. Rev. A | Page 5 of 44 Document Outline Features Applications General Description Typical Applications Circuit Table of Contents Revision History Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics ADP1874/ADP1875 Block Digram Theory of Operation Startup Soft Start Precision Enable Circuitry Undervoltage Lockout On-Board Low Dropout Regulator Thermal Shutdown Programming Resistor (RES) Detect Circuit Valley Current-Limit Setting Hiccup Mode During Short Circuit Synchronous Rectifier ADP1875 Power Saving Mode (PSM) Timer Operation Pseudo-Fixed Frequency Power Good Monitoring Voltage Tracking Applications Information Feedback Resistor Divider Inductor Selection Output Ripple Voltage (ΔVRR) Output Capacitor Selection Compensation Network Output Filter Impedance (ZFILT) Error Amplifier Output Impedance (ZCOMP) Error Amplifier Gain (Gm) Current-Sense Loop Gain (GCS) Crossover Frequency Efficiency Consideration Channel Conduction Loss MOSFET Driver Loss Switching Loss Diode Conduction Loss Inductor Loss Input Capacitor Selection Thermal Considerations Design Example Input Capacitor Inductor Current Limit Programming Output Capacitor Feedback Resistor Network Setup Compensation Network Loss Calculations External Component Recommendations Layout Considerations IC Section (Left Side of Evaluation Board) Power Section Differential Sensing Typical Application Circuits 12 A, 300 kHz High Current Application Circuit 5.5 V Input, 600 kHz Application Circuit 300 kHz High Current Application Circuit Outline Dimensions Ordering Guide
Data Sheet ADP1874/ADP1875 Parameter Symbol Test Conditions/Comments Min Typ Max Unit
TRACKING Track Input Voltage Range 0 5 V FB-to-Tracking Offset Voltage 0.5 V < TRACK < 0.6 V, offset = V − V 63 mV FB TRACK Leakage Current V = 5 V 1 50 nA TRACK 1 The maximum specified values are with the closed loop measured at 10% to 90% time points (see Figure 59 and Figure 60), CGATE = 4.3 nF, and the upper side and lower side MOSFETs being Infineon BSC042N03MS G. 2 Guaranteed by design. 3 Not automatic test equipment (ATE) tested. Rev. A | Page 5 of 44 Document Outline Features Applications General Description Typical Applications Circuit Table of Contents Revision History Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics ADP1874/ADP1875 Block Digram Theory of Operation Startup Soft Start Precision Enable Circuitry Undervoltage Lockout On-Board Low Dropout Regulator Thermal Shutdown Programming Resistor (RES) Detect Circuit Valley Current-Limit Setting Hiccup Mode During Short Circuit Synchronous Rectifier ADP1875 Power Saving Mode (PSM) Timer Operation Pseudo-Fixed Frequency Power Good Monitoring Voltage Tracking Applications Information Feedback Resistor Divider Inductor Selection Output Ripple Voltage (ΔVRR) Output Capacitor Selection Compensation Network Output Filter Impedance (ZFILT) Error Amplifier Output Impedance (ZCOMP) Error Amplifier Gain (Gm) Current-Sense Loop Gain (GCS) Crossover Frequency Efficiency Consideration Channel Conduction Loss MOSFET Driver Loss Switching Loss Diode Conduction Loss Inductor Loss Input Capacitor Selection Thermal Considerations Design Example Input Capacitor Inductor Current Limit Programming Output Capacitor Feedback Resistor Network Setup Compensation Network Loss Calculations External Component Recommendations Layout Considerations IC Section (Left Side of Evaluation Board) Power Section Differential Sensing Typical Application Circuits 12 A, 300 kHz High Current Application Circuit 5.5 V Input, 600 kHz Application Circuit 300 kHz High Current Application Circuit Outline Dimensions Ordering Guide