Datasheet ADP2323 (Analog Devices) - 9

Data Sheet ADP2323 TYPICAL PERFORMANCE CHARACTERISTICS
Operating conditions: TA = 25°C, VIN = 12 V, VOUT = 3.3 V, L = 4.7 µH, COUT = 2 × 47 µF, fSW = 600 kHz, unless otherwise noted.
100 100 95 95 90 90 85 85 %) %) ( 80 ( 80 Y Y C C N 75 N 75 IE IE 70 FFIC 70 FFIC E V E OUT = 5.0V VOUT = 5.0V 65 V 65 OUT = 3.3V VOUT = 3.3V VOUT = 2.5V VOUT = 2.5V 60 60 VOUT = 1.8V VOUT = 1.8V INDUCTOR: CDRH105RNP-3R3N V INDUCTOR: CDRH105RNP-6R8N V 55 OUT = 1.5V OUT = 1.5V MOSFET: FDS8880 55 V MOSFET: FDS8880 OUT = 1.2V VOUT = 1.2V 50 50 0 0.5 1.0 1.5 2.0 2.5 3.0
005
0 0.5 1.0 1.5 2.0 2.5 3.0
008
OUTPUT CURRENT (A)
09357-
OUTPUT CURRENT (A)
09357- Figure 5. Efficiency at VIN = 12 V, fSW = 600 kHz, FPWM Figure 8. Efficiency at VIN = 12 V, fSW = 300 kHz, FPWM
100 100 90 90 80 80 70 70 %) %) ( 60 ( 60 Y Y C C N 50 N 50 IE IE V V 40 OUT = 3.3V, FPWM OUT = 3.3V, FPWM FFIC 40 FFIC E VOUT = 3.3V, PFM E VOUT = 3.3V, PFM 30 VOUT = 5V, FPWM 30 VOUT = 5V, FPWM VOUT = 5V, PFM VOUT = 5V, PFM 20 20 10 INDUCTOR: CDRH105RNP-3R3N 10 INDUCTOR: CDRH105RNP-6R8N MOSFET: FDS8880 MOSFET: FDS8880 0 0 0.01 0.1 1 10
006
0.01 0.1 1 10
009
OUTPUT CURRENT (A) OUTPUT CURRENT (A)
09357- 09357- Figure 6. Efficiency at VIN = 12 V, fSW = 600 kHz, PFM Figure 9. Efficiency at VIN = 12 V, fSW = 300 kHz, PFM
40 3.20 3.15 35 3.10 (μA) mA) ( 30 NT NT 3.05 25 CURRE 3.00 N CURRE W NT DO 2.95 CE 20 S E SHUT UI T 2.90 T J = –40°C Q J = –40°C T 15 TJ = +25°C J = +25°C T T J = +125°C 2.85 J = +125°C 10 2.80 4 6 8 10 12 14 16 18 20
007
4 6 8 10 12 14 16 18 20
010
VIN (V) V
09357-
IN (V)
09357- Figure 7. Shutdown Current vs. VIN Figure 10. Quiescent Current vs. VIN Rev. A | Page 9 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