Datasheet ADP2138, ADP2139 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Compact, 800 mA, 3 MHz, Step-Down DC-to-DC Converter with an Internal Discharge Switch |
| Pages / Page | 20 / 3 — Data Sheet. ADP2138/ADP2139. SPECIFICATIONS. Table 1. Parameter. Test … |
| Revision | C |
| File Format / Size | PDF / 551 Kb |
| Document Language | English |
Data Sheet. ADP2138/ADP2139. SPECIFICATIONS. Table 1. Parameter. Test Conditions/Comments. Min. Typ. Max. Unit
Model Line for this Datasheet
Text Version of Document
Data Sheet ADP2138/ADP2139 SPECIFICATIONS
VIN = 3.6 V, VOUT = 0.8 V − 3.3 V, TJ = −40°C to +125°C for minimum/maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted. All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
Table 1. Parameter Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS Input Voltage Range 2.3 5.5 V Undervoltage Lockout Threshold VIN rising 2.3 V VIN falling 2.00 2.15 2.25 V OUTPUT CHARACTERISTICS Output Voltage Accuracy PWM mode −2 +2 % Line Regulation VIN = 2.3 V to 5.5 V, PWM mode 0.25 %/V Load Regulation ILOAD = 0 mA − 800 mA −0.95 %/A PWM TO POWER SAVE MODE CURRENT THRESHOLD 100 mA INPUT CURRENT CHARACTERISTICS DC Operating Current ILOAD = 0 mA, device not switching 23 30 μA Shutdown Current EN = 0 V, TA = TJ = −40°C to +85°C 0.2 1.0 μA SW CHARACTERISTICS SW On Resistance PFET 155 240 mΩ NFET 115 200 mΩ Current Limit PFET switch peak current limit 1100 1500 1650 mA Discharge Switch (ADP2139) 100 Ω ENABLE AND MODE CHARACTERISTICS Input High Threshold 1.2 V Input Low Threshold 0.4 V Input Leakage Current EN/MODE = 0 V (min), 3.6 V (max ) −1 0 +1 μA OSCILLATOR FREQUENCY 2.6 3.0 3.4 MHz START-UP TIME 250 μs THERMAL CHARACTERISTICS Thermal Shutdown Threshold 150 °C Thermal Shutdown Hysteresis 20 °C
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS
TA = −40°C to +125°C, unless otherwise specified. All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
Table 2. Parameter Symbol Min Typ Max Unit
MINIMUM INPUT AND OUTPUT CAPACITANCE CMIN 4.7 µF CAPACITOR ESR RESR 0.001 1 Ω Rev. C | Page 3 of 20 Document Outline Features Applications General Description Typical Applications Circuit Revision History Table of Contents Specifications Input and Output Capacitor, Recommended Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode Power Save Mode Power Save Mode Current Threshold Enable/Shutdown Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Operation Discharge Switch Applications Information ADIsimPower Design Tool External Component Selection Inductor Thermal Considerations PCB Layout Guidelines Evaluation Board Evaluation Board Layout Outline Dimensions Ordering Guide
VIN = 3.6 V, VOUT = 0.8 V − 3.3 V, TJ = −40°C to +125°C for minimum/maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted. All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
Table 1. Parameter Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS Input Voltage Range 2.3 5.5 V Undervoltage Lockout Threshold VIN rising 2.3 V VIN falling 2.00 2.15 2.25 V OUTPUT CHARACTERISTICS Output Voltage Accuracy PWM mode −2 +2 % Line Regulation VIN = 2.3 V to 5.5 V, PWM mode 0.25 %/V Load Regulation ILOAD = 0 mA − 800 mA −0.95 %/A PWM TO POWER SAVE MODE CURRENT THRESHOLD 100 mA INPUT CURRENT CHARACTERISTICS DC Operating Current ILOAD = 0 mA, device not switching 23 30 μA Shutdown Current EN = 0 V, TA = TJ = −40°C to +85°C 0.2 1.0 μA SW CHARACTERISTICS SW On Resistance PFET 155 240 mΩ NFET 115 200 mΩ Current Limit PFET switch peak current limit 1100 1500 1650 mA Discharge Switch (ADP2139) 100 Ω ENABLE AND MODE CHARACTERISTICS Input High Threshold 1.2 V Input Low Threshold 0.4 V Input Leakage Current EN/MODE = 0 V (min), 3.6 V (max ) −1 0 +1 μA OSCILLATOR FREQUENCY 2.6 3.0 3.4 MHz START-UP TIME 250 μs THERMAL CHARACTERISTICS Thermal Shutdown Threshold 150 °C Thermal Shutdown Hysteresis 20 °C
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS
TA = −40°C to +125°C, unless otherwise specified. All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
Table 2. Parameter Symbol Min Typ Max Unit
MINIMUM INPUT AND OUTPUT CAPACITANCE CMIN 4.7 µF CAPACITOR ESR RESR 0.001 1 Ω Rev. C | Page 3 of 20 Document Outline Features Applications General Description Typical Applications Circuit Revision History Table of Contents Specifications Input and Output Capacitor, Recommended Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode Power Save Mode Power Save Mode Current Threshold Enable/Shutdown Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Operation Discharge Switch Applications Information ADIsimPower Design Tool External Component Selection Inductor Thermal Considerations PCB Layout Guidelines Evaluation Board Evaluation Board Layout Outline Dimensions Ordering Guide
