Datasheet ADP2323 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Dual 3 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET |
| Pages / Page | 32 / 4 — ADP2323. Data Sheet. SPECIFICATIONS. Table 1. Parameters. Symbol. Test … |
| Revision | A |
| File Format / Size | PDF / 992 Kb |
| Document Language | English |
ADP2323. Data Sheet. SPECIFICATIONS. Table 1. Parameters. Symbol. Test Conditions/Comments. Min. Typ. Max. Units
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ADP2323 Data Sheet SPECIFICATIONS
PVIN1 = PVIN2 = 12 V at TJ = −40°C to +125°C, unless otherwise noted.
Table 1. Parameters Symbol Test Conditions/Comments Min Typ Max Units
POWER INPUT (PVINx PINS) Power Input Voltage Range V 4.5 20 V PVIN Quiescent Current (PVIN1 + PVIN2) I MODE = GND, no switching 3 5 mA Q Shutdown Current (PVIN1 + PVIN2) I EN1 = EN2 = GND 50 100 µA SHDN PVINx Undervoltage Lockout Threshold UVLO PVINx Rising 4.3 4.5 V PVINx Falling 3.5 3.8 V FEEDBACK (FBx PINS) FBx Regulation Voltage1 V PVINx = 4.5 V to 20 V 0.594 0.6 0.606 V FB FBx Bias Current I 0.01 0.1 µA FB ERROR AMPLIFIER (COMPx PINS) Transconductance g 230 300 370 µS m EA Source Current I 25 45 65 µA SOURCE EA Sink Current I 25 45 65 µA SINK INTERNAL REGULATOR (INTVCC PIN) INTVCC Voltage 4.75 5 5.25 V Dropout Voltage I = 30 mA 400 mV INTVCC Regulator Current Limit 40 75 120 mA SWITCH NODE (SWx PINS) High-Side On Resistance2 V to V = 5 V 90 130 mΩ BST SW SWx Peak Current Limit R = floating, V to V = 5 V 4 4.8 5.8 A ILIM BST SW R = 47 kΩ, V to V = 5 V 2.3 3 3.7 A ILIM BST SW R = 15 kΩ, V to V = 5 V 0.8 1.5 2.2 A ILIM BST SW SWx Minimum On Time3 t 130 ns MIN_ON SWx Minimum Off Time3 t 150 ns MIN_OFF LOW-SIDE DRIVER (DLx PINS ) Rising Time3 C = 2.2 nF, see Figure 19 20 ns DL Falling Time3 C = 2.2 nF, see Figure 22 10 ns DL Sourcing Resistor 4 6 Ω Sinking Resistor 2 4.5 Ω OSCILLATOR (RT PIN) PWM Switching Frequency f R = 100 kΩ 530 600 670 kHz SW OSC PWM Frequency Range 250 1200 kHz SYNCHRONIZATION (SYNC PIN) SYNC Input SYNC configured as input Synchronization Range 300 1200 kHz Minimum On Pulse Width 100 ns Minimum Off Pulse Width 100 ns High Threshold 1.3 V Low Threshold 0.4 V SYNC Output SYNC configured as output Frequency on SYNC Pin f f kHz CLKOUT SW Positive Pulse Time 100 ns SOFT START (SSx PINS) SSx Pin Source Current I 2.5 3.5 4.5 µA SS Rev. A | Page 4 of 32 Document Outline Features Applications Typical Application Circuit General Description Revision History Functional Block Diagram Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode PFM Mode Precision Enable/Shutdown Separate Input Voltages Internal Regulator (INTVCC) Bootstrap Circuitry Low-Side Driver Oscillator Synchronization Soft Start Peak Current-Limit and Short-Circuit Protection Voltage Tracking Parallel Operation Power Good Overvoltage Protection Undervoltage Lockout Thermal Shutdown Applications Information ADIsimPower Design Tool Input Capacitor Selection Output Voltage Setting Voltage Conversion Limitations Current-Limit Setting Inductor Selection Output Capacitor Selection Low-Side Power Device Selection Programming UVLO Input Compensation Components Design Design Example Output Voltage Setting Current-Limit Setting Frequency Setting Inductor Selection Output Capacitor Selection Low-Side MOSFET Selection Compensation Components Soft Start Time Programming Input Capacitor Selection External Components Recommendation Typical Application Circuits Outline Dimensions Ordering Guide
ADP2323 Data Sheet SPECIFICATIONS
PVIN1 = PVIN2 = 12 V at TJ = −40°C to +125°C, unless otherwise noted.
Table 1. Parameters Symbol Test Conditions/Comments Min Typ Max Units
POWER INPUT (PVINx PINS) Power Input Voltage Range V 4.5 20 V PVIN Quiescent Current (PVIN1 + PVIN2) I MODE = GND, no switching 3 5 mA Q Shutdown Current (PVIN1 + PVIN2) I EN1 = EN2 = GND 50 100 µA SHDN PVINx Undervoltage Lockout Threshold UVLO PVINx Rising 4.3 4.5 V PVINx Falling 3.5 3.8 V FEEDBACK (FBx PINS) FBx Regulation Voltage1 V PVINx = 4.5 V to 20 V 0.594 0.6 0.606 V FB FBx Bias Current I 0.01 0.1 µA FB ERROR AMPLIFIER (COMPx PINS) Transconductance g 230 300 370 µS m EA Source Current I 25 45 65 µA SOURCE EA Sink Current I 25 45 65 µA SINK INTERNAL REGULATOR (INTVCC PIN) INTVCC Voltage 4.75 5 5.25 V Dropout Voltage I = 30 mA 400 mV INTVCC Regulator Current Limit 40 75 120 mA SWITCH NODE (SWx PINS) High-Side On Resistance2 V to V = 5 V 90 130 mΩ BST SW SWx Peak Current Limit R = floating, V to V = 5 V 4 4.8 5.8 A ILIM BST SW R = 47 kΩ, V to V = 5 V 2.3 3 3.7 A ILIM BST SW R = 15 kΩ, V to V = 5 V 0.8 1.5 2.2 A ILIM BST SW SWx Minimum On Time3 t 130 ns MIN_ON SWx Minimum Off Time3 t 150 ns MIN_OFF LOW-SIDE DRIVER (DLx PINS ) Rising Time3 C = 2.2 nF, see Figure 19 20 ns DL Falling Time3 C = 2.2 nF, see Figure 22 10 ns DL Sourcing Resistor 4 6 Ω Sinking Resistor 2 4.5 Ω OSCILLATOR (RT PIN) PWM Switching Frequency f R = 100 kΩ 530 600 670 kHz SW OSC PWM Frequency Range 250 1200 kHz SYNCHRONIZATION (SYNC PIN) SYNC Input SYNC configured as input Synchronization Range 300 1200 kHz Minimum On Pulse Width 100 ns Minimum Off Pulse Width 100 ns High Threshold 1.3 V Low Threshold 0.4 V SYNC Output SYNC configured as output Frequency on SYNC Pin f f kHz CLKOUT SW Positive Pulse Time 100 ns SOFT START (SSx PINS) SSx Pin Source Current I 2.5 3.5 4.5 µA SS Rev. A | Page 4 of 32 Document Outline Features Applications Typical Application Circuit General Description Revision History Functional Block Diagram Specifications Absolute Maximum Ratings Thermal Resistance Boundary Condition ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode PFM Mode Precision Enable/Shutdown Separate Input Voltages Internal Regulator (INTVCC) Bootstrap Circuitry Low-Side Driver Oscillator Synchronization Soft Start Peak Current-Limit and Short-Circuit Protection Voltage Tracking Parallel Operation Power Good Overvoltage Protection Undervoltage Lockout Thermal Shutdown Applications Information ADIsimPower Design Tool Input Capacitor Selection Output Voltage Setting Voltage Conversion Limitations Current-Limit Setting Inductor Selection Output Capacitor Selection Low-Side Power Device Selection Programming UVLO Input Compensation Components Design Design Example Output Voltage Setting Current-Limit Setting Frequency Setting Inductor Selection Output Capacitor Selection Low-Side MOSFET Selection Compensation Components Soft Start Time Programming Input Capacitor Selection External Components Recommendation Typical Application Circuits Outline Dimensions Ordering Guide
