SQ24301DSD

Application Note: SQ24301 Super Low Dropout 1A LDO Regulator Advanced Design Specification General Description Features     The SQ24301 is a super low dropout LDO regulator with small package, capable of delivering up to 1A output current. Ordering Information        SQ24301 □(□□ □) Package Code Optional Spec Code Ordering Number SQ24301DSD Package type DFN3×3-6 Note ---- Input Voltage Range: 1.6-5.5V Output Voltage Accuracy: ±5% Up to 1A Output Current Low Dropout Voltage: Typ. 0.32V at IOUT=1A, VOUT=1.5V Typ. 0.18V at IOUT=1A, VOUT=2.8V Current Limiting Protection Thermal Shutdown Protection Quiescent Current: 60μA Output Auto-discharge Function Over Temperature Protection RoHS Compliant and Halogen Free Compact Package: DFN3×3-6 Applications    Portable Communication Equipments Hand-Held Instruments, Notebook PC Camcorders and Cameras Typical Applications VOUT VIN:1.6V~5.5V CIN 4.7µF OUT VIN K SQ24301 EN RH COUT 4.7µF ADJ RL GND Figure1. Schematic Diagram AN_SQ24301 Rev. 0.0 © 2021 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 1 All Rights Reserved. SQ24301 Pinout (top view) OUT 1 OUT 2 ADJ 6 VIN Exposed thermal pad 3 5 EN 4 GND (DFN3×3-6) Top mark: 8Txyz for SQ24301DSD (Device code: 8T, x=year code, y=week code, z= lot number code) Pin Name Pin Number OUT 1, 2 ADJ 3 GND EN 4 5 VIN 6 Pin Description Output pin. Decouple this pin to the GND pin with at least a 4.7μF ceramic capacitor. Output voltage programming pin. Connect this pin to the center point of the output resistor divider (as shown in Figure 1) to program the output voltage: VOUT=1.0V×(1+RH/RL). Ground pin. Enable control pin. A 5MΩ pull-down resistor is integrated. Input pin. Decouple this pin to the GND pin with at least a 4.7μF ceramic capacitor. Block Diagram OUT IN ADJ Current limiting Sensor + Ref EN 1.0 Control Logic Thermal Sensor GND Figure2. Block Diagram AN_SQ24301 Rev. 0.0 © 2021 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 2 All Rights Reserved. SQ24301 Absolute Maximum Ratings (Note 1) IN, EN ------------------------------------------------------------------------------------------------------------------------- 6.0V Power Dissipation, PD @ TA = 25°C DFN3×3-6 -------------------------------------------------------------------------- 2W Package Thermal Resistance (Note 2) θ JA -------------------------------------------------------------------------------------------------------------- 50°C/W θ JC -------------------------------------------------------------------------------------------------------------- 15°C/W Junction Temperature Range --------------------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) ---------------------------------------------------------------------------------- 260°C Storage Temperature Range ----------------------------------------------------------------------------------- -65°C to 150°C Recommended Operating Conditions (Note 3) Supply Input Voltage ---------------------------------------------------------------------------------------------- 1.6V to 5.5V Junction Temperature Range ---------------------------------------------------------------------------------- -40°C to 125°C Ambient Temperature Range ----------------------------------------------------------------------------------- -40°C to 85°C Electrical Characteristics (VIN = 5V, CIN=4.7μF, COUT=4.7μF. TJ = -40°C to +125°C. Typical values are specified. The values are guaranteed by test, design or statistical correlation.) Parameter Symbol Test Conditions Input Voltage Range VIN Supply Current ISS VEN=VIN=2V, VOUT=VADJ, IOUT=0A Shutdown Current ISD VIN=6.0V, VEN=0 Output Voltage VOUT=VADJ, VIN=2.0V, △ VOUT Accuracy IOUT=100mA Output Voltage Range Current Limit ILIM VOUT=VADJ, VIN=2.0V Load Regulation △ VOUT/△ IOUT 1mA≤IOUT≤1A △ VOUT/ VOUT=VADJ, IOUT=100mA Line Regulation △ VIN 2.0≤VIN≤5.5V EN Pull-down REN Resistance f=1kHz, Ripple 0.5VP-P Ripple Rejection RR VOUT=VADJ, VIN=2.5V, IOUT=100mA Output Voltage IOUT=100mA Temperature △ VOUT/△ T -40℃≤TJ≤85℃ Coefficient Short Current Limit ISHORT VOUT=0V Discharge Resistor RDISCHG EN Rising Threshold VENH EN Falling Threshold VENL Thermal Shutdown TSD Temperature (Note 4) Thermal Shutdown THYS Hysteresis (Note 4) Dropout Voltage VDROP Refer to following table AN_SQ24301 Rev. 0.0 © 2021 Silergy Corp. at TJ = 25°C, unless otherwise Min 1.6 Typ. Max 5.5 100 10 Unit V µA µA 0.95 1.05 V 1.0 1.0 VIN V A 60 0.1 -3 0.05 mV/A 0.3 %/V 5 MΩ -60 dB ±100 ppm/°C 250 100 mA Ω V V 1.0 0.3 150 °C 20 °C Silergy Corp. Confidential- Prepared for Customer Use Only 3 All Rights Reserved. SQ24301 Dropout Voltage by output Voltage Output Voltage(V) VOUT 1.0V≤VOUT < 1.5V 1.5V≤ VOUT < 2.6V (Note 4) 2.6V≤VOUT (Note 4) Typ. 0.18 0.10 0.05 TJ = -40°C to +125°C. Dropout Voltage VDROP (V) I=300mA I=1A Max Typ 0.32 0.50 0.15 0.28 0.10 0.18 Note 1: Stresses beyond the “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note 2: θ JA is measured in the natural convection at TA = 25°C on a two-layer Silergy evaluation board. Note 3: The device is not guaranteed to function outside its operating conditions. Note 4: Guaranteed by design. AN_SQ24301 Rev. 0.0 © 2021 Silergy Corp. Silergy Corp. Confidential- Prepared for Customer Use Only 4 All Rights Reserved. SQ24301 Typical Operating Characteristics Load Regulation Dropout Voltage vs. Input Voltage (VIN=2V, CIN=4.7μF, COUT=4.7μF) 1.010 0.6 IOUT=0.3A IOUT=1.0A Output Voltage (V) Dropout Voltage (V) 0.5 0.4 0.3 0.2 1.005 1.000 0.995 0.1 0 1.0 0.990 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Load Current (A) Input Voltage (V) Line Regulation Power Supply Rejection Ratio (IO=0.1A, CIN=4.7μF, COUT=4.7μF) (VIN=2.5V, Io=0.1A, CIN=4.7μF, COUT=4.7μF) 1.010 10 -10 Gain(dB) Output Voltage (V) 0 1.005 1.000 0.995 -20 -30 -40 -50 -60 0.990 1.5 2 2.5 3 3.5 4 4.5 5 Input Voltage (V) 5.5 -70 1k 10k 100k Startup from EN Shutdown from EN (VIN=2V, VOUT=1V, IO=1A) (VIN=2V, VOUT=1V, IO=1A) VEN 2.0V/div VOUT 1.0V/div IOUT VEN 2.0V/div VOUT 1.0V/div 500mA/div IOUT Time (20μs/div) AN_SQ24301 Rev. 0.0 © 2021 Silergy Corp. 500k Frequency (Hz) 500mA/div Time (10μs/div) Silergy Corp. Confidential- Prepared for Customer Use Only 5 All Rights Reserved. SQ24301 Load Transient Short Circuit Protection (VIN=2V, VOUT=1V, IO=0.1~1A) (VIN=2V, VOUT=1V, 1A to hard short) VOUT 500mV/div ∆VOUT IOUT 200mV/div 500mA/div Time (40μs/div) AN_SQ24301 Rev. 0.0 © 2021 Silergy Corp. IOUT 500mA/div Time (2ms/div) Silergy Corp. Confidential- Prepared for Customer Use Only 6 All Rights Reserved. SQ24301 Operation Information For better accuracy, choosing RL