Datasheet ADP7105 (Analog Devices) - 4

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ADP7105 Data Sheet Parameter Symbol Test Conditions/Comments Min Typ Max Unit
THERMAL SHUTDOWN Thermal Shutdown Threshold TS T rising 150 SD J °C Thermal Shutdown Hysteresis TS 15 SD-HYS °C SOFT START SOURCE CURRENT SS SS = GND 1 µA I-SOURCE PROGRAMMABLE EN/UVLO UVLO Threshold Rising UVLO 3.3 V ≤ V ≤ 20 V, T = −40°C to +125°C 1.18 1.22 1.28 V RISE IN J UVLO Threshold Falling UVLO 3.3 V ≤ V ≤ 20 V, T = −40°C to +125°C, 10 kΩ in 1.13 V FALL IN J series with the enable input pin UVLO Hysteresis Current UVLO V > 1.25 V, T = −40°C to +125°C 7.5 9.8 12 µA HYS EN J Enable Pull-Down Current I EN = V 500 nA EN-IN IN Start Threshold V T = −40°C to +125°C 3.2 V START J Shutdown Threshold V T = −40°C to +125°C 2.45 V SHUTDOWN J Hysteresis 250 mV OUTPUT NOISE OUT 10 Hz to 100 kHz, V = 5.5 V, V = 1.8 V 15 µV rms NOISE IN OUT 10 Hz to 100 kHz, V = 6.3 V, V = 3.3 V 15 µV rms IN OUT 10 Hz to 100 kHz, V = 8 V, V = 5 V 15 µV rms IN OUT 10 Hz to 100 kHz, V = 12 V, V = 9 V 15 µV rms IN OUT 10 Hz to 100 kHz, V = 5.5 V, V = 1.5 V, 18 µV rms IN OUT adjustable mode 10 Hz to 100 kHz, V = 12 V, V = 5 V, adjustable 30 µV rms IN OUT mode 10 Hz to 100 kHz, V = 20 V, V = 15 V, 65 µV rms IN OUT adjustable mode POWER SUPPLY REJECTION RATIO PSRR 100 kHz, V = 4.3 V, V = 3.3 V 50 dB IN OUT 100 kHz, V = 6 V, V = 5 V 50 dB IN OUT 10 kHz, V = 4.3 V, V = 3.3 V 60 dB IN OUT 10 kHz, V = 6 V, V = 5 V 60 dB IN OUT 100 kHz, V = 3.3 V, V = 1.8 V, adjustable mode 50 dB IN OUT 100 kHz, V = 6 V, V = 5 V, adjustable mode 60 dB IN OUT 100 kHz, V = 16 V, V = 15 V, adjustable mode 60 dB IN OUT 10 kHz, V = 3.3 V, V = 1.8 V, adjustable mode 60 dB IN OUT 10 kHz, V = 6 V, V = 5 V, adjustable mode 80 dB IN OUT 10 kHz, V = 16 V, V = 15 V, adjustable mode 80 dB IN OUT 1 Based on an endpoint calculation using 1 mA and 500 mA loads. See Figure 6 for typical load regulation performance for loads less than 1 mA. 2 The adjust input function (ADJ) of the SENSE/ADJ pin applies to adjustable output voltage models only; whereas the sense function (SENSE) applies to fixed output voltage models only. 3 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This specification applies only for output voltages greater than 3.0 V. 4 Start-up time is defined as the time between the rising edge of EN to VOUT being at 90% of its nominal value. 5 Current-limit threshold is defined as the current at which the output voltage falls to 90% of the specified typical value. For example, the current limit for a 5.0 V output voltage is defined as the current that causes the output voltage to fall to 90% of 5.0 V, or 4.5 V.
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS Table 2. Parameter Symbol Test Conditions/Comments Min Typ Max Unit
Minimum Input and Output Capacitance1 C T = −40°C to +125°C 0.7 µF MIN A Capacitor ESR R T = −40°C to +125°C 0.001 0.2 Ω ESR A 1 Ensure that the minimum input and output capacitance is greater than 0.7 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 regulator. Rev. C | Page 4 of 26 Document Outline Features Applications Typical Application Circuits General Description Table of Contents Revision History Specifications Input and Output Capacitor, Recommended Specifications 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 Programmable Undervoltage Lockout (UVLO) Soft Start Function Power-Good Feature Noise Reduction of the Adjustable ADP7105 Current-Limit and Thermal Overload Protection Thermal Considerations Printed Circuit Board Layout Considerations Outline Dimensions Ordering Guide