R5523N001A-TR-FE

R5523N SERIES USB HIGH-SIDE POWER SWITCH NO.EA-168-180516 OUTLINE The R5523N is a high-side MOSFET switch IC for Universal Serial Bus (USB) applications. Low ON Resistance (Typ.130m) and low supply current (Typ.20A at active mode) are realized in this IC. An over-current limit circuit, a thermal shutdown circuit, and an under voltage lockout (UVLO) circuit are built-in as protection circuits. Further, a delay circuit for flag signal after detecting over-current, is embedded to prevent miss-operation of error flag because of inrush current. The R5523N Series is ideal for applications of protection for USB power supply. Since the package is small SOT-23-5, high density mounting on board is possible. FEATURES  Built-in P-channel MOSFET Switch  · Supply Current ············································ Typ. 20A (at Active Mode)  Switch ON Resistance ································· Typ. 130m  Output Current ············································· Min. 500mA  Flag Delay Time ··········································· Typ. 10ms.  Package ····················································· SOT-23-5  Over- Current Limit / Short Circuit Protection  Built-in Under Voltage Lockout (UVLO) Function  Built-in Thermal Shutdown Protection  Built-in Soft-start Function APPLICATIONS  USB Peripherals  Notebook PCs SELECTION GUIDE The logic of the enable pin for the ICs can be selected at the user’s request. Product Name R5523N001-TR-FE Package Quantity per Reel Pb Free Halogen Free SOT-23-5 3,000 pcs Yes Yes  : Designation of the logic of the enable pin. (A) "L" active (B) "H" active 1 R5523N NO.EA-168-180516 BLOCK DIAGRAM IN OUT GATE CONTROL EN CURRENT LIMIT FLAG DELAY UVLO THERMAL SHUTDOWN GND R5523N Block Diagram PIN DESCRIPTION 5 4 (mark side) 1 2 3 R5523N (SOT-23-5) Pin Configuration 2 Pin No Symbol Pin Description 1 EN Enable Pin 2 GND Ground Pin 3 FLG FLG pin (Open Drain Output) 4 VIN Power Supply Pin 5 VOUT Output Pin FLG R5523N NO.EA-168-180516 ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit 6.5 V 0.3 to VIN+0.3 V VIN Input Voltage VEN Enable Pin Input Voltage VFLG Flag Voltage 0.3 to 6.5 V IFLG Flag Current 14 mA VOUT Output Voltage 0.3 to VIN+0.3 V IOUT Output Current PD Power Dissipation(1) (SOT-23-5, JEDEC STD.51-7) Tj Tstg Internal Limited 660 mW Junction Temperature Range 40 to 125 C Storage Temperature 55 to 125 C ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the lifetime and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Rating Unit VIN Operating Input Voltage 2.2 to 5.5 V Ta Operating Temperature Range −40 to 85 °C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. (2) Refer to POWER DISSIPATION for detailed information. 3 R5523N NO.EA-168-180516 ELECTRICAL CHARACTERISTICS R5523N001A/B Electrical Characteristics Symbol Item IDD1 Supply Current 1 (Enabled) (Ta = 25C) Conditions Typ. Max. Unit VOUT = OPEN (1) 20 45 μA IDD2 Supply Current 2 (Disabled) VOUT = OPEN (2) 0.1 1.0 μA RON Switch On Resistance VIN = 5V, IOUT = 500mA 130 180 m ton Output Turn-on Delay VIN = 5V, RL = 60 1400 μs toff Output Turn-off Delay VIN = 5V, RL = 60 5 μs VUVLO UVLO Threshold VIN at increasing 1.9 V VHYS UVLO Hysteresis Range VIN at decreasing 0.1 V ITH Current Limit Threshold ILIM Short Current Limit VIN=5V, 5ms after VOUT = 0V(3) Min. 1.6 1.0 1.5 A 0.5 0.75 1.3 A 5 10 20 ms VIN = 5V, tFD Over Current Flag Delay From Over Current to FLG = "L" TTS IEN (1) Thermal Shutdown Tj at increasing 135 C Temperature Threshold Tj at decreasing 120 C Enable Pin Input Current 0.01 VEN1 Enable Pin Input Voltage 1 VEN at increasing VEN2 Enable Pin Input Voltage 2 VEN at decreasing ILO Output Leakage Current VLF Flag "L" Output Voltage ISINK = 1mA IFOF Flag Off Current VFLG = 5.5V 2.0 4 μA V 0.1 0.01 EN=”L”(R5523NxxxA)､EN=”H”(R5523NxxxB) EN=”H”(R5523NxxxA)､EN=”L”(R5523NxxxB) (3) Refer to “Overcurrent Detection and Overcurrent limit” in THEORY OF OPERATION for details. (2) 1.0 0.8 V 1.0 μA 0.4 V 1.0 μA R5523N NO.EA-168-180516 THEORY OF OPERATION This explanation is based on the typical application.  There is a parasitic diode between source and drain of the switch transistor. (Refer to the block diagram.) Because of this, in both cases of enable and disable, if the voltage of VOUT pin is higher than VIN pin, current flows from VOUT to VIN.  In case that VOUT pin and GND is short, if over-current would continue, the temperature of the IC would increase drastically. If the temperature of the IC is beyond 135°C, the switch transistor turns off and the FLG pin level becomes "L". Then, when the temperature of the IC decreases equal or lower than 120°C, the switch transistor turns on and FLG becomes "H". Unless the abnormal situation of VOUT pin is removed, the switch transistor repeats on and off. Refer to the 24) Thermal Shutdown operation in the typical characteristics.  Over-current level is set internally in the IC. There are three types of response against over-current: Under the condition that VOUT pin is short or large capacity is loaded, if the IC is enabled, the IC becomes constant current state. After the flag delay time passes, FLG becomes "L", that means over current state. Refer to the 23) current limit transient response of typical characteristics. While the switch transistor is on, if VOUT pin is short or large capacity is loaded, until the current limit circuit responds, large transient current flows. After the transient current is beyond the over-current detector threshold and delay time of the flag passes, FLG becomes "L", that means over current state. Refer to the 25), 26) over-current limit transient response of typical characteristics. In the case that load current gradually increases, the IC is not into the constant current state until the current is beyond over current limit. Once the level is beyond the over current detector threshold, load current is limited into over current limit level. Note that load current continuously flows until the load current is beyond the over-current detector threshold.  FLG pin is Nch Open drain output. If the over-current or over-temperature is detected, FLG becomes "L". If over-current is detected, FLG becomes "L" after the flag delay time tFD passes. Therefore flag signal is not out with inrush current.  UVLO circuit prevents that the switch transistor turns on until the input voltage is beyond 1.9V. UVLO circuit can operate when the IC is enabled. 5 R5523N NO.EA-168-180516 Timing Chart R5523N001A Output On time/ Output Off time VEN 50% tON 50% 90% tOFF 10% VOUT FLG Output Delay Time VEN 50% tFD VFLG 10% R5523N001B Output On time/ Output Off time VEN 50% tON 50% tOFF 90% 10% VOUT FLG Output Delay Time VEN 50% tFD VFLG 10% 6 R5523N NO.EA-168-180516 Overcurrent Detection and Overcurrent Limit ITH (1) ILIM IOUT (2)