Datasheet ADP5074 (Analog Devices) - 9

Data Sheet ADP5074 2.3 TA = +125°C 2.2 TA = +25°C mA) ( TA = –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
017
0 2 4 6 8 10 12 14 16 CH1 5.00V M 4.00µs 2.50GS/s CH1 7.00V
020
V
12818-
IN (V) CH2 500mV BW T 29.50% 1M POINTS CH3 100mA
12818- 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
018
CH1 1.00V B CH1 5.00V M 200ns 2.50GS/s CH1 7.00V W M 4.00ms 250kS/s CH1 5.00V
021
B CH2 100mV B T 11.92ms 10k POINTS CH2 500mV W T 37.70% 1M POINTS W
12818-
CH4 20.0mV B CH3 200mA
12818-
W
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 = 100 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 B
019
CH1 5.00V W M 200ns 2.50GS/s CH1 7.70V CH3 10.0mA B
022
W T 12.48ms 100k POINTS CH2 500mV BW T –13.0020µs 1M POINTS CH4 5.00mV B
12818-
W CH3 200mA
12818- Figure 17. Load Transient Showing ILOAD, VOUT, and VFB, VIN = 12 V, Figure 20. Continuous Conduction Mode Operation Showing Inductor VOUT = −5 V, 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 = 250 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 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