Datasheet ADP2105, ADP2106, ADP2107 (Analog Devices) - 6

ADP2105/ADP2106/ADP2107 Data Sheet Parameter Min Typ Max Unit Test Conditions/Comments
INPUT CURRENT CHARACTERISTICS IN Operating Current 20 µA ADP2105/ADP2106/ADP2107 (ADJ), VFB = 0.9 V 30 µA ADP2105/ADP2106/ADP2107 (ADJ), VFB = 0.9 V, −40°C ≤ TJ ≤ +125°C 20 µA ADP2105/ADP2106/ADP2107 (x.x V) output voltage 10% above regulation voltage 30 µA ADP2105/ADP2106/ADP2107 (x.x V) output voltage 10% above regulation voltage, −40°C ≤ TJ ≤ +125°C IN Shutdown Current4 0.1 1 µA VEN = 0 V LX (SWITCH) NODE CHARACTERISTICS LX On Resistance4 190 mΩ P-channel switch, ADP2105 270 mΩ P-channel switch, ADP2105, −40°C ≤ TJ ≤ +125°C 100 mΩ P-channel switch, ADP2106 and ADP2107 165 mΩ P-channel switch, ADP2106 and ADP2107, −40°C ≤ TJ ≤ +125°C 160 mΩ N-channel synchronous rectifier, ADP2105 230 mΩ N-channel synchronous rectifier, ADP2105, −40°C ≤ TJ ≤ +125°C 90 mΩ N-channel synchronous rectifier, ADP2106 and ADP2107 140 mΩ N-channel synchronous rectifier, ADP2106 and ADP2107, −40°C ≤ TJ ≤ +125°C LX Leakage Current4, 5 0.1 1 µA VIN = 5.5 V, VLX = 0 V, 5.5 V LX Peak Current Limit5 2.9 A P-channel switch, ADP2107 2.6 3.3 A P-channel switch, ADP2107, −40°C ≤ TJ ≤ +125°C 2.25 A P-channel switch, ADP2106 2.0 2.6 A P-channel switch, ADP2106, −40°C ≤ TJ ≤ +125°C 1.5 A P-channel switch, ADP2105 1.3 1.8 A P-channel switch, ADP2105, −40°C ≤ TJ ≤ +125°C LX Minimum On-Time 110 ns In PWM mode of operation, −40°C ≤ TJ ≤ +125°C ENABLE CHARACTERISTICS EN Input High Voltage 2 V VIN = 2.7 V to 5.5 V, −40°C ≤ TJ ≤ +125°C EN Input Low Voltage 0.4 V VIN = 2.7 V to 5.5 V, −40°C ≤ TJ ≤ +125°C EN Input Leakage Current −0.1 µA VIN = 5.5 V, VEN = 0 V, 5.5 V −1 +1 µA VIN = 5.5 V, VEN = 0 V, 5.5 V, −40°C ≤ TJ ≤ +125°C OSCILLATOR FREQUENCY 1.2 MHz VIN = 2.7 V to 5.5 V 1 1.4 MHz VIN = 2.7 V to 5.5 V, −40°C ≤ TJ ≤ +125°C SOFT START PERIOD 750 1000 1200 µs CSS = 1 nF THERMAL CHARACTERISTICS Thermal Shutdown Threshold 140 °C Thermal Shutdown Hysteresis 40 °C COMPENSATOR 50 µA/V TRANSCONDUCTANCE (gm) CURRENT SENSE AMPLIFIER GAIN (GCS)2 1.875 A/V ADP2105 2.8125 A/V ADP2106 3.625 A/V ADP2107 1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). Typical values are at TA = 25°C. 2 Guaranteed by design. 3 The ADP2105/ADP2106/ADP2107 line regulation was measured in a servo loop on the automated test equipment that adjusts the feedback voltage to achieve a specific COMP voltage. 4 All LX (switch) node characteristics are guaranteed only when the LX1 pin and LX2 pin are tied together. 5 These specifications are guaranteed from −40°C to +85°C. Rev. E | Page 6 of 36 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL OPERATING CIRCUIT REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE BOUNDARY CONDITION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PWM MODE OPERATION PFM MODE OPERATION PULSE-SKIPPING THRESHOLD 100% DUTY CYCLE OPERATION (LDO MODE) DESIGN FEATURES Enable/Shutdown Synchronous Rectification Current Limit Short-Circuit Protection Undervoltage Lockout (UVLO) Thermal Protection Soft Start APPLICATIONS INFORMATION ADIsimPower DESIGN TOOL EXTERNAL COMPONENT SELECTION SETTING THE OUTPUT VOLTAGE INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION INPUT CAPACITOR SELECTION INPUT FILTER SOFT START PERIOD LOOP COMPENSATION BODE PLOTS LOAD TRANSIENT RESPONSE EFFICIENCY CONSIDERATIONS Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses THERMAL CONSIDERATIONS DESIGN EXAMPLE EXTERNAL COMPONENT RECOMMENDATIONS CIRCUIT BOARD LAYOUT RECOMMENDATIONS EVALUATION BOARD EVALUATION BOARD SCHEMATIC FOR ADP2107 (1.8 V) RECOMMENDED PCB LAYOUT (EVALUATION BOARD LAYOUT) APPLICATION CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE