Datasheet ADP1882, ADP1883 (Analog Devices) - 10

ADP1882/ADP1883 0.804 1000 0.803 950 900 ) 0.802 V ( E ) 850 0.801 Hz AG k T L Y ( 800 O 0.800 NC UE 750 Q 0.799 E DBACK V R 700 E F E F 0.798 650 V V IN = 3.6V IN = 5.5V 0.797 V +125°C +125°C DD = 2.7V, VIN = 2.7/3.6V 600 V +25°C +25°C DD = 3.6V, VIN = 3.6V TO 16.5V V –40°C –40°C DD = 5.5V, VIN = 5.5/13V/16.5V 0.796 550
1 2
–40.0 –7.5 25.0 57.5 90.0 122.5
24 0
10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2
0 1- 1- 90 90
TEMPERATURE (°C) V
08 08
IN (V)
Figure 22. Feedback Voltage vs. Temperature Figure 25. Switching Frequency vs. High Input Voltage, 1.0 MHz, ±10% of 12 V
355 335 340 325 315 325 305 310 ) ) Hz k 295 Hz 295 k Y ( Y ( 285 280 NC NC UE 275 265 Q UE E Q R 265 E 250 F R F 255 235 245 V V DD = 3.6V DD = 5.5V 220 V V IN = 5.5V VIN = 13V IN = 16.5V +125°C +125°C +125°C +125°C +125°C 235 +25°C +25°C 205 +25°C +25°C +25°C –40°C –40°C –40°C –40°C –40°C 225 190
22
10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2
0
0 2k 4k 6k 8k 10k 12k 14k 16k
5 1- -02
V
890
IN (V)
01 0
LOAD CURRENT (mA)
89 0 Figure 23. Switching Frequency vs. High Input Voltage, 300 kHz, ±10% of 12 V Figure 26. Frequency vs. Load Current, 300 kHz, VOUT = 0.8 V
650 380 VIN = 5.5V 370 +125°C +25°C 360 600 –40°C 350 ) ) 340 Hz Hz k 550 k ( 330 Y ( Y NC NC 320 E UE U VIN = 13V Q 500 310 Q E +125°C R RE +25°C F 300 F –40°C 290 450 V V V OUT = 1.8V DD = 5.5V 280 IN = 16.5V +125°C +125°C +125°C +25°C +25°C 270 +25°C –40°C –40°C –40°C 400 260
23
10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2
6 0
0 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k
02 1- 1- 90
V
90
IN (V) LOAD CURRENT (mA)
08 08 Figure 24. Switching Frequency vs. High Input Voltage, 600 kHz, VOUT = 1.8 V, Figure 27. Frequency vs. Load Current, 300 kHz, VOUT = 1.8 V ±10% of 12 V Rev. 0 | Page 10 of 40 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE BOUNDARY CONDITION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS ADP1882/ADP1883 BLOCK DIAGRAM THEORY OF OPERATION STARTUP SOFT START PRECISION ENABLE CIRCUITRY UNDERVOLTAGE LOCKOUT THERMAL SHUTDOWN PROGRAMMING RESISTOR (RES) DETECT CIRCUIT VALLEY CURRENT-LIMIT SETTING HICCUP MODE DURING SHORT CIRCUIT SYNCHRONOUS RECTIFIER POWER SAVING MODE (PSM) VERSION (ADP1883) TIMER OPERATION PSEUDO-FIXED FREQUENCY APPLICATIONS INFORMATION FEEDBACK RESISTOR DIVIDER INDUCTOR SELECTION OUTPUT RIPPLE VOLTAGE (ΔVRR) OUTPUT CAPACITOR SELECTION COMPENSATION NETWORK Output Filter Impedance (ZFILT) Error Amplifier Output Impedance (ZCOMP) Error Amplifier Gain (GM) Current-Sense Loop Gain (GCS) Crossover Frequency EFFICIENCY CONSIDERATIONS Channel Conduction Loss MOSFET Driver Loss Switching Loss Diode Conduction Loss Inductor Loss INPUT CAPACITOR SELECTION THERMAL CONSIDERATIONS DESIGN EXAMPLE Input Capacitor Inductor Current Limit Programming Output Capacitor Feedback Resistor Network Setup Compensation Network Loss Calculations EXTERNAL COMPONENT RECOMMENDATIONS LAYOUT CONSIDERATIONS IC SECTION (LEFT SIDE OF EVALUATION BOARD) POWER SECTION DIFFERENTIAL SENSING TYPICAL APPLICATIONS CIRCUITS DUAL-INPUT, 300 kHz HIGH CURRENT APPLICATIONS CIRCUIT SINGLE-INPUT, 600 kHz APPLICATIONS CIRCUIT DUAL-INPUT, 300 kHz HIGH CURRENT APPLICATIONS CIRCUIT OUTLINE DIMENSIONS ORDERING GUIDE