Datasheet ADP2325 (Analog Devices) - 9

Data Sheet ADP2325 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, VIN = 12 V, VOUT = 3.3 V, L = 2.2 µH, COUT = 2 × 100 µF, fSW = 600 kHz, unless otherwise noted.
100 100 INDUCTOR: FDVE1040-2R2M INDUCTOR: FDVE1040-4R7M MOSFET: FDS8880 95 MOSFET: FDS8880 95 90 90 85 85 %) %) ( 80 ( 80 Y Y C C N 75 N 75 IE IE 70 FFIC FFIC 70 E E 65 65 VOUT = 5.0V VOUT = 5.0V 60 VOUT = 3.3V 60 V V OUT = 3.3V OUT = 2.5V V V OUT = 2.5V OUT = 1.8V V 55 V 55 OUT = 1.8V OUT = 1.5V V V OUT = 1.5V OUT = 1.2V VOUT = 1.2V 50 50 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
005
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
008
OUTPUT CURRENT (A)
10036-
OUTPUT CURRENT (A)
10036- Figure 5. Efficiency at VIN = 12 V, fSW = 600 kHz, FPWM Figure 8. Efficiency at VIN = 12 V, fSW = 300 kHz, FPWM
100 100 INDUCTOR: FDVE1040-2R2M INDUCTOR: FDVE1040-4R7M MOSFET: FDS8880 MOSFET: FDS8880 90 90 80 80 70 70 %) %) ( 60 ( 60 Y Y C C N 50 N 50 IE IE FFIC 40 40 FFIC E E 30 30 20 20 VOUT = 5.0V, FPWM VOUT = 5.0V, FPWM V V 10 OUT = 3.3V, FPWM OUT = 3.3V, FPWM V 10 OUT = 5.0V, PFM VOUT = 5.0V, PFM VOUT = 3.3V, PFM VOUT = 3.3V, PFM 0 0 0.01 0.1 1
006
0.01 0.1 1
009
OUTPUT CURRENT (A)
10036-
OUTPUT CURRENT (A)
10036- Figure 6. Efficiency at VIN = 12 V, fSW = 600 kHz, FPWM and PFM Figure 9. Efficiency at VIN = 12 V, fSW = 300 kHz, FPWM and PFM
100 100 INDUCTOR: FDVE1040-1R5M INDUCTOR: FDVE1040-4R7M MOSFET: FDS8880 95 MOSFET: FDS8880 95 90 90 85 85 %) ( %) 80 ( Y 80 Y C C N 75 N IE 75 IE 70 FFIC FFIC 70 E E 65 65 VOUT = 5.0V 60 VOUT = 3.3V 60 VOUT = 3.3V VOUT = 2.5V VOUT = 2.5V V V 55 OUT = 1.8V OUT = 1.8V V 55 OUT = 1.5V VOUT = 1.5V VOUT = 1.2V VOUT = 1.2V 50 50 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
007
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
010
OUTPUT CURRENT (A)
10036-
OUTPUT CURRENT (A)
10036- Figure 7. Efficiency at V Figure 10. Efficiency at V IN = 5 V, fSW = 600 kHz, FPWM IN = 18 V, fSW = 300 kHz, FPWM 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 Coincident Tracking Ratiometric 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 the 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 Recommendations Typical Application Circuits Packaging and Ordering Information Outline Dimensions Ordering Guide