Datasheet ADP2230 (Analog Devices) - 7

Data Sheet ADP2230 TYPICAL PERFORMANCE CHARACTERISTICS
VIN = VENx = 5.0 V, CIN1 = CIN2 = COUT1 = COUT2 = 10 µF (GRM21BR61C106KE15), L1 = L2 = 2.2 μH (XFL3012-222MEB), typical values are at TA = 25°C, and minimum/maximum limits are guaranteed for TJ = −40°C to +125°C, unless otherwise noted. Al limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
100 1.220 V V OUT = 1.2V V OUT = 1.2V IN = 2.5V f f AUTO MODE V SW = 2MHz SW = 2MHz IN = 3.5V AUTO MODE 1.215 VIN = 4.5V 90 VIN = 5.5V 1.210 VIN = 6.5V 1.205 80 E (V) %) ( G 1.200 Y A C LT N 70 PWM MODE O 1.195 IE T V PWM MODE U 1.190 FFIC E TP 60 OU 1.185 VIN = 2.5V 1.180 50 VIN = 3.5V VIN = 4.5V 1.175 VIN = 5.5V VIN = 6.5V 40 1.170 0.1 1 10 100 1000
103
1 10 100 1000
106
LOAD CURRENT (mA) LOAD CURRENT (mA)
10705- 10705- Figure 3. Efficiency vs. Load Current, VOUT = 1.2 V, Different Input Voltages Figure 6. Load Regulation, VOUT = 1.2 V
100 3.36 VOUT = 3.3V V V AUTO MODE OUT = 3.3V IN = 4.5V f V 95 fSW = 2MHz 3.35 IN = 5.5V SW = 2MHz VIN = 6.5V 90 3.34 85 3.33 AUTO MODE %) E (V) ( 80 G 3.32 Y A C LT N 75 O 3.31 IE PWM MODE T V 70 U FFIC 3.30 E TP 65 OU 3.29 60 3.28 PWM MODE V 55 IN = 4.5V V 3.27 IN = 5.5V VIN = 6.5V 50 3.26 0.1 1 10 100 1000
104
0.1 1 10 100 1000
107
LOAD CURRENT (mA)
10705-
LOAD CURRENT (mA)
10705- Figure 4. Efficiency vs. Load Current, VOUT = 3.3 V, Different Input Voltages Figure 7. Load Regulation, VOUT = 3.3 V
1.45 280 VOUT = 1.2V VOUT = 1.8V V 260 OUT = 3.3V US 1.40 240 INUO A) ( ) NT A 220 NT 1.35 (m CO T 200 N UM E IM CURRE 180 AX UT 1.30 P CURR M L UT D A A O 160 C O L YPI 1.25 V T 140 OUT = 1.2V RISING VOUT = 1.8V RISING VOUT = 3.3V RISING 120 VOUT = 1.2V FALLING VOUT = 1.8V FALLING 1.20 VOUT = 3.3V FALLING 2.3 3.3 4.3 5.3 6.3
105
100
1 1
2.3 3.0 3.7 4.4 5.1 5.8 6.5
0
INPUT VOLTAGE (V)
10705-
INPUT VOLTAGE (V)
10705- Figure 5. Typical Maximum Continuous Output Current vs. Input Voltage Figure 8. PSM to PWM Mode Transition Threshold vs. Input Voltage Rev. A | Page 7 of 18 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATION CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS RECOMMENDED COMPONENT SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW OPERATING CONDITIONS Input Voltage Output Voltage SYNC PIN CONTROL SCHEMES PWM Mode PSM/PWM Automatic Transitioning Mode External Clock Synchronization FEATURES DESCRIPTIONS Precision Enable Quick Output Discharge Output Short-Circuit Protection Undervoltage Lockout Thermal Shutdown Soft Start Current Limit 100% Duty Cycle APPLICATIONS INFORMATION SETTING THE OUTPUT VOLTAGE SELECTING THE INDUCTOR SELECTING THE INPUT AND OUTPUT CAPACITORS Input Capacitor Output Capacitor PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE