Datasheet ADP5073 (Analog Devices) - 9

Data Sheet ADP5073 2.3 +125°C 2.2 +25°C mA) ( –40°C NT 2.1 IINDUCTOR 3 2.0 CURRE NT CE 1.9 1 S E VSW UI 1.8 Q ING 1.7 RAT 2 E P V 1.6 OUT O 1.5
016
0 2 4 6 8 10 12 14 16 CH1 5.00V M 4.00µs 2.50GS/s CH1 10.0V
019
V B
12817-
CH2 500mV W T 63.60% 1M POINTS IN (V) CH3 100mA
12817- Figure 15. Operating Quiescent Current (IQ) vs. Input Voltage (VIN) for Various Figure 18. Skip Mode Operation Showing Inductor Current (IINDUCTOR), Switch Temperatures, EN Pin On Node Voltage (VSW), and Output Ripple (VOUT), VIN = 12 V, VOUT = −5 V, ILOAD = 1 mA, fSW = 1.2 MHz, TA = 25°C
VIN IINDUCTOR 3 VOUT 2 1 1 VSW VFB 4 VOUT 2
017
CH1 1.00V B
0
W M 4.00ms 2.50MS/s CH1 5.00V CH1 5.00V M 200ns 2.50GS/s CH1 7.00V
-02
CH2 100mV B T 20.00% 100k POINTS B W
12817-
CH2 500mV W T 37.70% 1M points CH4 20.0mV BW CH3 200mA
12817 Figure 16. Line Transient Showing VIN, VOUT, and VFB, VIN = 4.5 V to 5.5 V Step, Figure 19. Discontinuous Conduction Mode Operation Showing Inductor VOUT = −5 V, RLOAD = 300 Ω, fSW = 1.2 MHz, TA = 25°C Current (IINDUCTOR), Switch Node Voltage (VSW), and Output Ripple (VOUT), VIN = 12 V, VOUT = −5 V, ILOAD = 50 mA, fSW = 1.2 MHz, TA = 25°C
IINDUCTOR ILOAD 3 VOUT 2 3 1 VSW VFB 4 VOUT 2 CH2 50.0mV BW M 4.00ms 2.50MS/s CH3 40.0mA CH1 5.00V M 200ns 2.50GS/s CH1 7.70V
018 021
CH3 10.0mA BW T 12.48ms 100k POINTS CH2 500mV BW T –13.0020µs 1M POINTS CH4 5.00mV B
12817-
W CH3 200mA B
12817-
W
Figure 17. Load Transient Showing ILOAD, VOUT, and VFB, VIN = 12 V, VOUT = −5 V, Figure 20. Continuous Conduction Mode Operation Showing Inductor ILOAD = 35 mA to 45 mA Step, fSW = 1.2 MHz, TA = 25°C Current (IINDUCTOR), Switch Node Voltage (VSW), and Output Ripple (VOUT), VIN = 12 V, VOUT = −5 V, ILOAD = 200 mA, fSW = 1.2 MHz, TA = 25°C Rev. A | Page 9 of 17 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION PWM MODE SKIP MODE UNDERVOLTAGE LOCKOUT (UVLO) OSCILLATOR AND SYNCHRONIZATION INTERNAL REGULATORS PRECISION ENABLING SOFT START SLEW RATE CONTROL CURRENT-LIMIT PROTECTION OVERVOLTAGE PROTECTION POWER GOOD 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