Datasheet ADP2121 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 600 mA, 6 MHz Synchronous Step-Down DC-to-DC Converter |
| Pages / Page | 20 / 3 — Data Sheet. ADP2121. SPECIFICATIONS. Table 2. Parameters. Conditions. … |
| Revision | C |
| File Format / Size | PDF / 2.4 Mb |
| Document Language | English |
Data Sheet. ADP2121. SPECIFICATIONS. Table 2. Parameters. Conditions. Min. Typ. Max. Unit
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Text Version of Document
Data Sheet ADP2121 SPECIFICATIONS
VIN = EN = 3.6 V; VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, and 2.3 V; typical values are at TA = 25°C; and minimum/maximum limits guaranteed for TJ = −40°C to +125°C,1 unless otherwise noted.
Table 2. Parameters Conditions Min Typ Max Unit
SUPPLY Input Voltage Range VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V 2.3 5.5 V VOUT = 2.3 V 2.9 5.5 V Quiescent Current Auto mode, no load, not switching, TA = −40°C to 85°C 36 56 µA PWM mode, no load 10 mA Shutdown Current VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VEN = 0 V, TA = −40°C to 85°C 0.3 1 µA VOUT = 2.3 V, VEN = 0 V, TA = −40°C to 85°C 0.4 1.5 µA UNDERVOLTAGE LOCKOUT Undervoltage Lockout Threshold VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN rising 2.1 2.3 V VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN falling 1.6 2.0 V VOUT = 2.3 V, VIN rising 2.4 2.6 V VOUT = 2.3 V, VIN falling 1.9 2.3 V OUTPUT Maximum Continuous Output Current2 VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN = 2.3 V 300 mA VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN = 2.5 V 500 mA VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN = 2.7 V to 5.5 V 600 mA VOUT = 2.3 V, VIN = 2.9 V to 5.5 V 600 mA Output Voltage Accuracy3 Auto mode, VIN = 3.6 V, TA = 25°C, no load, with respect to VOUT −3 +3 % PWM mode, VIN = 2.5 V to 4.5 V, no load, with respect to VOUT −3 +3 % Load Regulation4 PWM mode, ILOAD = 1 mA to 600 mA −0.2 %/A Feedback Bias Current VOUT = 1.8 V, VFB = 1.8 V and VOUT = 1.82 V, VFB = 1.82 V 3.8 8 µA VOUT = 1.85, VFB = 1.85 V and VOUT = 1.875 V, VFB = 1.875 V 4.1 8 µA VOUT = 2.3 V, VFB = 2.3 V 6.4 8 µA SWITCHING CHARACTERISTICS SW On Resistance (RDSon) P-channel switch 220 440 mΩ N-channel synchronous rectifier 260 550 mΩ SW Leakage Current VIN = 5.5 V, VSW = 0 V and 5.5 V 5 µA SW Current Limit P-channel switch, open loop, TA = −40°C to 125°C 790 1000 1222 mA P-channel switch, open loop, TA = −40°C to 85°C 828 1000 1222 mA Oscillator Frequency 5.36 6 6.64 MHz EN/MODE INPUT LOGIC VIN = 2.3 V to 5.5 V High Threshold Voltage 1.3 V Low Threshold Voltage 0.4 V Leakage Current VIN = VEN = VMODE = 5.5 V 0.01 1 µA SOFT START Time from EN ≥ 1.2 V to stable VOUT Soft Start Period5 VOUT = 1.82 V, RLOAD = 5.1 Ω 275 310 µs VOUT = 1.8 V, 1.85 V, 1.875 V, RLOAD = 5.1 Ω 75 85 µs VOUT = 2.3 V, RLOAD = 5.1 Ω 100 115 µs SHORT-CIRCUIT THRESHOLD 1.24 V THERMAL SHUTDOWN Thermal Shutdown Threshold 150 °C Thermal Shutdown Hysteresis 15 °C 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. The maximum output current guarantee for 2.3 V to 2.5 V increases linearly from 300 mA to 500 mA. The maximum output current guarantee for 2.5 V to 2.7 V increases linearly from 500 mA to 600 mA. For greater than 2.7 V, the maximum output current guarantee is 600 mA. 3 Transients not included in voltage accuracy specifications. For PFM mode, the VOUT accuracy specification is for the upper point of the ripple. 4 The load regulation typical value includes all voltage options. The typical value is different for each voltage option, but can be up to −0.2%/A. 5 Typical value characterized on bench. Maximum specification guaranteed by design. CIN = 2.2 µF (GRM155R60J225M), L = 0.47 µH (LQM2HPNR47MG0L), COUT = 4.7 µF (GRM155R60J475ME87D). Rev. C | Page 3 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW MODE SELECTION Pulse-Width Modulation (PWM) Mode Auto Mode (PFM and PWM Switching) Pulse Frequency Modulation (PFM) Mode Transition ENABLE/SHUTDOWN INTERNAL CONTROL FEATURES Overcurrent Protection Soft Start Synchronous Rectification Compensation Undervoltage Lockout (UVLO) Output Short-Circuit Protection Thermal Shutdown (TSD) Protection APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE
VIN = EN = 3.6 V; VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, and 2.3 V; typical values are at TA = 25°C; and minimum/maximum limits guaranteed for TJ = −40°C to +125°C,1 unless otherwise noted.
Table 2. Parameters Conditions Min Typ Max Unit
SUPPLY Input Voltage Range VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V 2.3 5.5 V VOUT = 2.3 V 2.9 5.5 V Quiescent Current Auto mode, no load, not switching, TA = −40°C to 85°C 36 56 µA PWM mode, no load 10 mA Shutdown Current VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VEN = 0 V, TA = −40°C to 85°C 0.3 1 µA VOUT = 2.3 V, VEN = 0 V, TA = −40°C to 85°C 0.4 1.5 µA UNDERVOLTAGE LOCKOUT Undervoltage Lockout Threshold VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN rising 2.1 2.3 V VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN falling 1.6 2.0 V VOUT = 2.3 V, VIN rising 2.4 2.6 V VOUT = 2.3 V, VIN falling 1.9 2.3 V OUTPUT Maximum Continuous Output Current2 VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN = 2.3 V 300 mA VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN = 2.5 V 500 mA VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VIN = 2.7 V to 5.5 V 600 mA VOUT = 2.3 V, VIN = 2.9 V to 5.5 V 600 mA Output Voltage Accuracy3 Auto mode, VIN = 3.6 V, TA = 25°C, no load, with respect to VOUT −3 +3 % PWM mode, VIN = 2.5 V to 4.5 V, no load, with respect to VOUT −3 +3 % Load Regulation4 PWM mode, ILOAD = 1 mA to 600 mA −0.2 %/A Feedback Bias Current VOUT = 1.8 V, VFB = 1.8 V and VOUT = 1.82 V, VFB = 1.82 V 3.8 8 µA VOUT = 1.85, VFB = 1.85 V and VOUT = 1.875 V, VFB = 1.875 V 4.1 8 µA VOUT = 2.3 V, VFB = 2.3 V 6.4 8 µA SWITCHING CHARACTERISTICS SW On Resistance (RDSon) P-channel switch 220 440 mΩ N-channel synchronous rectifier 260 550 mΩ SW Leakage Current VIN = 5.5 V, VSW = 0 V and 5.5 V 5 µA SW Current Limit P-channel switch, open loop, TA = −40°C to 125°C 790 1000 1222 mA P-channel switch, open loop, TA = −40°C to 85°C 828 1000 1222 mA Oscillator Frequency 5.36 6 6.64 MHz EN/MODE INPUT LOGIC VIN = 2.3 V to 5.5 V High Threshold Voltage 1.3 V Low Threshold Voltage 0.4 V Leakage Current VIN = VEN = VMODE = 5.5 V 0.01 1 µA SOFT START Time from EN ≥ 1.2 V to stable VOUT Soft Start Period5 VOUT = 1.82 V, RLOAD = 5.1 Ω 275 310 µs VOUT = 1.8 V, 1.85 V, 1.875 V, RLOAD = 5.1 Ω 75 85 µs VOUT = 2.3 V, RLOAD = 5.1 Ω 100 115 µs SHORT-CIRCUIT THRESHOLD 1.24 V THERMAL SHUTDOWN Thermal Shutdown Threshold 150 °C Thermal Shutdown Hysteresis 15 °C 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. The maximum output current guarantee for 2.3 V to 2.5 V increases linearly from 300 mA to 500 mA. The maximum output current guarantee for 2.5 V to 2.7 V increases linearly from 500 mA to 600 mA. For greater than 2.7 V, the maximum output current guarantee is 600 mA. 3 Transients not included in voltage accuracy specifications. For PFM mode, the VOUT accuracy specification is for the upper point of the ripple. 4 The load regulation typical value includes all voltage options. The typical value is different for each voltage option, but can be up to −0.2%/A. 5 Typical value characterized on bench. Maximum specification guaranteed by design. CIN = 2.2 µF (GRM155R60J225M), L = 0.47 µH (LQM2HPNR47MG0L), COUT = 4.7 µF (GRM155R60J475ME87D). Rev. C | Page 3 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW MODE SELECTION Pulse-Width Modulation (PWM) Mode Auto Mode (PFM and PWM Switching) Pulse Frequency Modulation (PFM) Mode Transition ENABLE/SHUTDOWN INTERNAL CONTROL FEATURES Overcurrent Protection Soft Start Synchronous Rectification Compensation Undervoltage Lockout (UVLO) Output Short-Circuit Protection Thermal Shutdown (TSD) Protection APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE
