Datasheet ADP5075 (Analog Devices) - 8

ADP5075 Data Sheet 90 0.50 ) 80 ) (% FB 70 0.30 – V F 60 RE 1.2MHz E (V 0.10 CY (%) 50 G N 2.4MHz A IE 40 AVER –0.10 EFFIC 30 OM FR 20 –0.30 ATION 10
009
VARI
012
0
12819-
–0.50
12819-
0.001 0.01 0.1 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 CURRENT LOAD (A) OUTPUT CURRENT (A)
Figure 9. Efficiency vs. Current Load, VIN = 5 V, VNEG = −34 V, TA = 25°C Figure 12. Load Regulation, VIN = 12 V, VNEG = −5 V, fSW = 1.2 MHz, TA = 25°C
90 0.96 80 0.94 70 0.92 IT (A) 60 IM –40°C L 0.90 +25°C NT CY (%) 50 +125°C N IE 0.88 40 R CURRE EFFIC –40°C 0.86 30 +25°C TO +125°C 20 0.84 INDUC 10 0.82
010 013
0
12819-
0.80
12819-
0.001 0.01 0.1 1 0 2 4 6 8 10 12 14 16 CURRENT LOAD (A) VIN (V)
Figure 10. Efficiency vs. Current Load for Various Temperatures, VIN = 5 V, Figure 13. Inductor Current Limit (ILIMIT) vs. Input Voltage (VIN) for Various VNEG = −15 V, fSW = 1.2 MHz Temperatures
0.50 2.54 ) TA = +125°C ) (% TA = +25°C FB TA = –40°C 0.30 ) 2.49 – V Hz F (M RE 2.44 E (V 0.10 NCY G A UE Q RE 2.39 AVER –0.10 R F OM O 2.34 FR LLAT –0.30 SCI ATION O 2.29 VARI
011
–0.50
12819-
2.24 0 2 4 6 8 10 12 14 16 0 2 4 6 8 10 12 14 16
014
VIN (V) VIN (V)
12819- Figure 11. Line Regulation, VNEG = −5 V, fSW = 1.2 MHz, 15 mA Load, TA = 25°C Figure 14. Oscillator Frequency vs. Input Voltage (VIN) for Various Temperatures, SYNC/FREQ Pin = High Rev. B | Page 8 of 19 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION PWM MODE PSM MODE UNDERVOLTAGE LOCKOUT (UVLO) OSCILLATOR AND SYNCHRONIZATION INTERNAL REGULATORS PRECISION ENABLING SOFT START SLEW RATE CONTROL CURRENT-LIMIT PROTECTION OVERVOLTAGE PROTECTION THERMAL SHUTDOWN APPLICATIONS INFORMATION ADIsimPOWER DESIGN TOOL COMPONENT SELECTION Feedback Resistors Output Capacitor Input Capacitor VREG Capacitor VREF Capacitor Soft Start Resistor Diodes Inductor Selection Loop Compensation COMMON APPLICATIONS LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE