Datasheet ADP2105, ADP2106, ADP2107 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | 2 Amp Synchronous, Step-Down DC-to-DC Converter |
| Seiten / Seite | 36 / 7 — Data Sheet. ADP2105/ADP2106/ADP2107. ABSOLUTE MAXIMUM RATINGS Table 2. … |
| Revision | E |
| Dateiformat / Größe | PDF / 1.0 Mb |
| Dokumentensprache | Englisch |
Data Sheet. ADP2105/ADP2106/ADP2107. ABSOLUTE MAXIMUM RATINGS Table 2. THERMAL RESISTANCE. Parameter. Rating
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Data Sheet ADP2105/ADP2106/ADP2107 ABSOLUTE MAXIMUM RATINGS Table 2. THERMAL RESISTANCE Parameter Rating
θJA is specified for the worst-case conditions, that is, a device IN, EN, SS, COMP, FB to AGND −0.3 V to +6 V soldered in a circuit board for surface-mount packages. LX1, LX2 to PGND −0.3 V to (VIN + 0.3 V) PWIN1, PWIN2 to PGND −0.3 V to +6 V
Table 3. Thermal Resistance
PGND to AGND −0.3 V to +0.3 V
Package Type θJA Unit
GND to AGND −0.3 V to +0.3 V 16-Lead LFCSP 40 °C/W PWIN1, PWIN2 to IN −0.3 V to +0.3 V Maximum Power Dissipation 1 W Operating Junction Temperature Range −40°C to +125°C Storage Temperature Range −65°C to +150°C
BOUNDARY CONDITION
Soldering Conditions JEDEC J-STD-020 Natural convection, 4-layer board, exposed pad soldered to the PCB.
ESD CAUTION
Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. Rev. E | Page 7 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
θJA is specified for the worst-case conditions, that is, a device IN, EN, SS, COMP, FB to AGND −0.3 V to +6 V soldered in a circuit board for surface-mount packages. LX1, LX2 to PGND −0.3 V to (VIN + 0.3 V) PWIN1, PWIN2 to PGND −0.3 V to +6 V
Table 3. Thermal Resistance
PGND to AGND −0.3 V to +0.3 V
Package Type θJA Unit
GND to AGND −0.3 V to +0.3 V 16-Lead LFCSP 40 °C/W PWIN1, PWIN2 to IN −0.3 V to +0.3 V Maximum Power Dissipation 1 W Operating Junction Temperature Range −40°C to +125°C Storage Temperature Range −65°C to +150°C
BOUNDARY CONDITION
Soldering Conditions JEDEC J-STD-020 Natural convection, 4-layer board, exposed pad soldered to the PCB.
ESD CAUTION
Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. Rev. E | Page 7 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