Datasheet ADP121 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 150 mA, Low Quiescent Current, CMOS Linear Regulator |
| Pages / Page | 20 / 4 — ADP121. Data Sheet. Parameter. Symbol. Conditions. Min. Typ. Max. Unit. … |
| Revision | G |
| File Format / Size | PDF / 677 Kb |
| Document Language | English |
ADP121. Data Sheet. Parameter. Symbol. Conditions. Min. Typ. Max. Unit. RECOMMENDED SPECIFICATIONS: INPUT AND OUTPUT CAPACITORS
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ADP121 Data Sheet Parameter Symbol Conditions Min Typ Max Unit
POWER SUPPLY REJECTION RATIO PSRR 10 kHz, V = 5 V, V = 3.3 V 60 dB IN OUT 10 kHz, V = 5 V, V = 2.5 V 66 dB IN OUT 10 kHz, V = 5 V, V = 1.2 V 70 dB IN OUT 1 Based on an end-point calculation using 1 mA and 100 mA loads. See Figure 6 for typical load regulation performance for loads less than 1 mA. 2 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only for output voltages above 2.3 V. 3 Start-up time is defined as the time between the rising edge of EN to VOUT being at 90% of its nominal value. 4 Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 3.0 V output voltage is defined as the current that causes the output voltage to drop to 90% of 3.0 V, or 2.7 V.
RECOMMENDED SPECIFICATIONS: INPUT AND OUTPUT CAPACITORS Table 2. Parameter Symbol Conditions Min Typ Max Unit
INPUT AND OUTPUT CAPACITOR1 Minimum Input and Output Capacitance C T = −40°C to +125°C 0.70 µF MIN A Capacitor ESR R T = −40°C to +125°C 0.001 1 Ω ESR A 1 The minimum input and output capacitance should be greater than 0.70 μF over the full range of operating conditions. The full range of operating conditions in the application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R and X5R type capacitors are recommended; Y5V and Z5U capacitors are not recommended for use with any LDO. Rev. G | Page 4 of 20 Document Outline Features Applications Typical Application Circuits General Description Revision History Specifications Recommended Specifications: Input and Output Capacitors Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Undervoltage Lockout Enable Feature Current Limit and Thermal Overload Protection Thermal Considerations PCB Layout Considerations Outline Dimensions Ordering Guide
ADP121 Data Sheet Parameter Symbol Conditions Min Typ Max Unit
POWER SUPPLY REJECTION RATIO PSRR 10 kHz, V = 5 V, V = 3.3 V 60 dB IN OUT 10 kHz, V = 5 V, V = 2.5 V 66 dB IN OUT 10 kHz, V = 5 V, V = 1.2 V 70 dB IN OUT 1 Based on an end-point calculation using 1 mA and 100 mA loads. See Figure 6 for typical load regulation performance for loads less than 1 mA. 2 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only for output voltages above 2.3 V. 3 Start-up time is defined as the time between the rising edge of EN to VOUT being at 90% of its nominal value. 4 Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 3.0 V output voltage is defined as the current that causes the output voltage to drop to 90% of 3.0 V, or 2.7 V.
RECOMMENDED SPECIFICATIONS: INPUT AND OUTPUT CAPACITORS Table 2. Parameter Symbol Conditions Min Typ Max Unit
INPUT AND OUTPUT CAPACITOR1 Minimum Input and Output Capacitance C T = −40°C to +125°C 0.70 µF MIN A Capacitor ESR R T = −40°C to +125°C 0.001 1 Ω ESR A 1 The minimum input and output capacitance should be greater than 0.70 μF over the full range of operating conditions. The full range of operating conditions in the application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R and X5R type capacitors are recommended; Y5V and Z5U capacitors are not recommended for use with any LDO. Rev. G | Page 4 of 20 Document Outline Features Applications Typical Application Circuits General Description Revision History Specifications Recommended Specifications: Input and Output Capacitors Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Undervoltage Lockout Enable Feature Current Limit and Thermal Overload Protection Thermal Considerations PCB Layout Considerations Outline Dimensions Ordering Guide
