Datasheet ADP5075 (Analog Devices) - 9

Data Sheet ADP5075 1.27 TA = +125°C TA = +25°C VIN ) 1.25 TA = –40°C Hz (M 1.23 NCY UE Q 1.21 VOUT RE 3 R F 1.19 1 O VFB LLAT 1.17 SCI 2 O 1.15 1.13 CH1 1.00V B 00V CH2 10.0mV B 4.00ms CH1 5.06V
018
0 2 4 6 8 10 12 14 16 W W
015
CH3 100mV B T 12.4800ms V W
12819-
IN (V)
12819- Figure 15. Oscillator Frequency vs. Input Voltage (VIN) for Various Figure 18. Line Transient Showing VIN, VOUT, and VFB, VIN = 4.5 V to 5.5 V Step, Temperatures, SYNC/FREQ Pin = Low VNEG = −12 V, RLOAD = 300 Ω, fSW = 1.2 MHz, TA = 25°C
14 ILOAD 12 (µA) NT 10 CURRE V NT 8 OUT 3 ESCE 6 4 UI N Q VFB W 4 DO 2 2 T SHUT A = +125°C TA = +25°C TA = –40°C 0 CH2 10.0mV BW 4.00ms CH4 41.2mA
019
0 2 4 6 8 10 12 14 16
016
CH3 50.0mV BW CH4 10.0mA BW T 11.9600ms V
12819-
IN (V)
12819- Figure 16. Shutdown Quiescent Current vs. Input Voltage (VIN) for Various Figure 19. Load Transient Showing ILOAD, VOUT, and VFB, VIN = 5 V, VNEG = −12 V, Temperatures, EN Pin Below Shutdown Threshold ILOAD = 35 mA to 45 mA Step, fSW = 1.2 MHz, TA = 25°C
2.5 2.0 IINDUCTOR 4 1.5 (mA) –40°C NT +25°C +125°C SW 1.0 2 CURRE V 0.5 NEG 3
017
0
12819-
CH2 5.00V B 4.00µs CH2 3.10V
020
0 2 4 6 8 10 12 14 16 W CH3 20.0mV B T 401.600µs V W CH4 50.0mA BW
12819-
IN (V)
Figure 17. Operating Quiescent Current vs. Input Voltage (VIN) for Various Figure 20. Skip Mode Operation Showing Inductor Current (IINDUCTOR), Switch Temperatures, EN Pin On Node Voltage, and Output Ripple, VIN = 5 V, VNEG = −5 V, ILOAD = 0.5 mA, fSW = 1.2 MHz, TA = 25°C Rev. B | Page 9 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