LTP3456-18NYT5

LTP3456 P-1 General Description The LTP3456 family is a 500 mA LDO linear regulator with auto discharge function, It uses an advanced CMOS process and a P-MOSFET pass device to achieve high power supply rejection ratio (PSRR), low noise, low dropout, low ground current, fast start-up, and excellent output accuracy. The LTP3456 family is stable with a 1.0 µF ceramic output capacitor. The device uses a precision voltage reference and feedback loop to achieve excellent Regulation and transient response. The LTP3456 family is offered in a small SOT23-5L and DFN1×1-4L packages, which are ideal for small form factor portable equipment. The LTP3456 family is available in standard fixed output voltages of 0.8 V, 1.2 V, 1.5 V, 1.8 V , 2.5 V, 2.8 V, 3.0 V, and 3.3 V. Features and Benefits ◼ Wide Input Voltage Range from 1.9 V to 5.5 V ◼ Up to 500 mA Load Current ◼ Standard Fixed Output Voltage Options: 0.8 V, 1.2 V, 1.5 V, 1.8V, 2.5 V, 2.8 V, 3.0 V and 3.3 V ◼ Very Low IQ of 45 µA Typically ◼ Low Dropout of Typical 200 mV at 2.8 V Output and 300 mA Load ◼ High PSRR: 70 dB at 1 kHz ◼ Low Noise: 40 µVRMS at 1.2 V Output ◼ Excellent Load/Line Transient Response ◼ Packages:SOT23-5L, DFN1×1-4L Applications ◼ Smart Phones and Tablets ◼ IP Cameras ◼ Portable instruments CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO LTP3456 P-2 Ordering Information Model Note1 LTP3456 Package Name Type Number Note1 Packing Quantity SOT23-5L LTP3456-xxNYT5 Tape and Reel, 3 000 DFN1×1-4L LTP3456-xxNYF4 Tape and Reel, 10 000 Note1: xx stands for output voltage, e.g. if xx = 18, the output voltage is 1.8V; if xx = 30, the output voltage is 3.0V. The device with suffix "N" is shutdown version with enable control input. Pin Configurations (Top View) IN 1 GND 2 EN 3 IN EN IN EN 5 OUT 4 3 4 3 4 NC 1 2 1 2 OUT GND OUT GND SOT23-5 DFN1.0×1.0-4L Pin Function Package SOT23-5L DFN1×1-4L Symbol Function 1 4 IN 2 2 GND Supply input pin. Ground. 3 3 EN Enable control input, active high. 4 / NC No Connection. 5 1 OUT Output pin. CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO LTP3456 P-3 Block Diagram IN OUT RLOW Gate Driver EN Current Limitand Thermal Shutdown + VREF GND Functional Description INPUT CAPACITOR A 1 μF ceramic capacitor is recommended to connect between VIN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both VIN and GND. OUTPUT CAPACITOR An output capacitor is required for the stability of the LDO. The recommended output capacitance is from 0.47 µF to 4.7 µF, Equivalent Series Resistance (ESR) is from 5 mΩ to 100 mΩ, and temperature characteristics is X7R or X5R. Higher capacitance values help to improve load/line transient response. The output capacitance may be increased to keep low undershoot/overshoot. Place output capacitor as close as possible to OUT and GND pins. ON/OFF INPUT OPERATION The LTP3456 is turned on by setting the EN pin high, and is turned off by pulling it low. If this feature is not used, the EN pin should be tied to IN pin to keep the regulator output on at all time. ULTRA FAST START-UP After enabled, the LTP3456 is able to provide full power in as little as tens of microseconds, typically 80 µs. This feature will help load circuitry move in and out of standby mode in real time, eventually extend battery life for mobile phones and other portable devices. CURRENT LIMIT PROTECTION When output current at the OUT pin is higher than current limit threshold or the OUT pin is short-circuit to GND, the current limit protection will be triggered and clamp the output current to approximately 500 mA to prevent over-current and to protect the regulator from damage due to overheating. THERMAL SHUTDOWN PROTECTION Thermal protection disables the output when the junction temperature rises to approximately +155°C , allowing the device to cool down. When the junction temperature reduces to approximately + 130°C the output circuitry is enabled again. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This cycling limits the heat dissipation of the regulator, protecting it from damage due to overheating. CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO LTP3456 P-4 Absolute Maximum Ratings Parameter Symbol Min. Max. Unit IN Voltage VIN –0.3 7 V –0.3 VIN + 0.3 V 500 mA DFN1×1-4L 180 °C/W SOT23-5 260 °C/W 150 °C 150 °C 300 °C Other Pin Voltage Maximum Load Current Package Thermal Resistance Junction Temperature TJ Storage Temperature TSTG Lead Temperature(Soldering, 10 sec) –65 TL NOTE：Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol IN Voltage VIN Output Current Min. Max. Unit 1.9 5.5 V IOUT 0 500 mA Operating Ambient Temperature TA -40 85 Effective Input Ceramic Capacitor Value CIN 0.47 4.7 µF Effective Output Ceramic Capacitor Value COUT 0.47 4.7 µF Input and Output Capacitor Equivalent Series Resistance (ESR) ESR 5 100 mΩ Caution: This integrated circuit can be damaged by ESD if you don’t pay attention to ESD protection. LINEARIN recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. LINEARIN reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. Please contact LINEARIN sales office to get the latest datasheet. CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO LTP3456 P-5 Electrical Characteristics TA = +25°C, VIN = VEN = VOUT + 1 V unless otherwise noted. Symbol Parameter VIN ΔVOUT Test Conditions Input Voltage Range Regulated Output Voltage IOUT = 1 mA, -40℃≤ TA ≤85℃ Line Regulation VIN = VOUT +1 V to 5.5 V, IOUT = 10 mA Min Max Unit 1.9 Typ 5.5 V –2 2 %VOUT 0.03 0.2 %VOUT 40 mA Load Regulation IOUT = 0 mA to 300 mA 20 TS Soft-start Time From enable to power on 80 µS ISHORT Short Current limit VOUT = 0 V 70 mA IQ-ON DC Supply Quiescent Current Active mode: VEN=VIN 45 70 μA IQ-OFF DC Supply Shutdown Current VEN = 0V 0.01 1 μA VDROP Dropout Voltage ILMT Current Limit PSRR Power supply rejection ration VOUT = 1.2 V, IOUT = 300 mA 380 480 mV VOUT = 1.5 V, IOUT = 300 mA 300 400 mV VOUT = 1.8 V, IOUT = 300 mA 220 340 mV VOUT = 2.5 V, IOUT = 300 mA 210 330 mV VOUT = 2.8 V, IOUT = 300 mA 200 320 mV VOUT = 3.0 V, IOUT = 300 mA 190 310 mV VOUT = 3.3 V, IOUT = 300 mA 180 300 mV RLOAD = 1 Ω 300 mA f = 1 kHz, COUT = 1 µF, IOUT = 20 mA 70 dB f = 10 kHz, COUT = 1 µF, IOUT = 30 mA 65 dB BW = 10 Hz to 100 kHz, IOUT = 200 mA, VOUT = 2.8 V, COUT = 1 µF 60 μVRMS BW = 10 Hz to 100 kHz, IOUT = 200 mA, VOUT = 1.2 V, COUT = 1 µF 40 μVRMS 0.3 V eN Output Noise Voltage VIL EN Low Threshold VIH EN High Threshold IEN EN Pin Input current RPD EN pull-down resistance RLOW Output resistance of auto discharge at off state EN= 0 V,VIN= 4 V 90 Ω TTSD Thermal shutdown threshold TJ rising 150 °C THYS Thermal shutdown hysteresis TJ falling from shutdown 20 °C 1.2 VEN = 0 V 0.8 V 0 0.1 μA 1 1.3 MΩ Note: Production test at + 25℃. Specifications over the temperature range are guaranteed by design and characterization. CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO LTP3456 P-6 Application Circuits VIN VDD VOUT OUT 1µF 1µF Enable EN GND ON OFF CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO LTP3456 P-7 Package Dimension DFN1×1-4L D A2 A E e A1 b P1N1 Unit: mm Symbol Dimensions In Millimeters MIN MOD MAX A 0.450 0.500 0.550 A1 0.000 0.025 0.050 A2 0.125REF D 0.950 1.000 1.050 D1 0.380 0.480 0.580 E 0.950 1.000 1.050 E1 0.380 0.480 0.580 b 0.150 0.200 0.250 e 0.650BSC f 0.190 0.195 0.200 L 0.150 0.250 0.350 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO LTP3456 P-8 Package Dimension SOT23-5L θ D E E1 L b c e Symbol A A2 A1 e1 Unit: mm Dimensions In Millimeters MIN MAX A 0.700 1.250 A1 0.000 0.100 A2 1.050 1.150 b 0.350 0.500 c 0.080 0.200 D 2.820 3.020 E 2.650 2.950 E1 1.600 1.700 e 0.950BSC E1 1.800 2.000 L 0.300 0° 0.600 8° Θ CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Linearin and designs are registered trademarks of LinearinTechnology Corporation. ©Copyright Linearin Technology Corporation. All RightsReserved. All other trademarks mentioned are the property of their respective owners. FN1621-42.0 — Data Sheet High PSRR, 500 mA LDO