R5523N RICOH | Alldatasheet

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Technical content

USB HIGH-SIDE POWER SWITCH R5523N SERIES R5523N_E/2006/05/12

DESCRIPTION

The R5523N is CMOS-based high-side MOSFET switch IC for Universal Serial Bus (USB) applications. Low ON Resistance (Typ. 130mΩ) and low supply current (Typ. 20µA at active mode) are realized in this IC. An over-current limit circuit, a thermal shutdown circuit, and an under voltage lockout 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 is ideal for applications of protection for USB power supply. Since the package is small SOT23-5, high density mounting on board is possible.

FEATURES

  • Built-in 130 mΩ (Typ.) P-channel MOSFET Switch
  • Low Supply Current Typ. 20µA (at Active Mode)
  • Output Current Min. 500mA/ Min. 250mA 2 types are available.
  • Flag Delay Time Typ. 10ms.
  • Over- Current Limit / Short Circuit Protection
  • Under Voltage Lockout
  • Thermal Shutdown Protection
  • Soft-start Function
  • SOT23-5 pin Package

APPLICATIONS

  • USB Peripherals
  • Notebook PCs

In the R5523N Series, output current and the logic of the enable pin can be designated. Part Number is designated as follows: R5523Nxxx x-TR ← Part Number ↑↑ ↑ a b c Code Description a Designation of the output current. 001: 500mA 002: 250mA (Under development) b Designation of the logic of the enable pin. A: active with "L" B: active with "H" c Designation of the taping type. TR (Refer to the taping specifications.)

Topt=25°C Symbol Item Ratings Unit VIN Input Voltage 6.5 V VEN Enable Pin Input Voltage -0.3 ~ VIN+0.3 V VFLG Flag Voltage -0.3 ~ 6.5 V IFLG Flag Current 14 mA VOUT Output Voltage -0.3 ~ VIN+0.3 V IOUT Output Current Internal Limited PD Power Dissipation Internal Limited Topt Operating Tempera- ture -40 ~ +85 °C Tstg Storage Temperature -55 ~ +125 °C ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits. 1 2 3

Pin No. Symbol 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

ELECTRICAL CHARACTERISTICS

  • R5523N001A/B Topt=25°C Symbol Item Conditions Min. Typ. Max. Unit VIN Input Voltage 2.2 5.5 V IDD1 Supply Current 1 *Note1 VOUT = open (Note1) 20 45 µA IDD2 Supply Current 2 *Note2 OUT = open, (Note2) 0.1 1.0 µA RON Switch On Resistance VIN = 5V, IOUT=500mA 130 180 mΩ tON Output Turn-on Delay VIN = 5V, RL=60Ω 400 µs tOFF Output Turn-off Delay VIN = 5V, RL=60Ω 5 µs VUVLO UVLO Threshold VIN = increasing 1.6 1.9 V VHYS UVLO Hysteresis Range VIN = decreasing 0.1 V ITH Current Limit Threshold 1.0 1.5 A ILIM Short Current Limit VOUT=0V 0.50 0.75 1.30 A tFD Over Current Flag Delay From Over Current to FLG = "L" 5 10 20 ms Tj =increasing 135 TTS Thermal Shutdown Temperature Threshold Tj =decreasing 120 IEN Enable Pin Input Current 0.01 1.00 µA VEN1 Enable Pin Input Voltage 1 VEN = increasing 2.0 V VEN2 Enable Pin Input Voltage 2 VEN = decreasing 0.8 V ILO Output Leakage Current 0.1 1.0 µA VLF Flag "L" Output Voltage ISINK = 1mA 0.4 V IFOF Flag Off Current VFLAG = 5.5V 0.01 1.00 µA
  • R 5 5 2 3 N 0 0 2 A / B T o p t = 2 5 ° C Symbol Item Conditions Min. Typ. Max. Unit VIN Input Voltage 2.2 5.5 V IDD1 Supply Current 1 *Note1 VOUT = open (Note1) 20 45 µA IDD2 Supply Current 2 *Note2 OUT = open, (Note2) 0.1 1.0 µA RON Switch On Resistance VIN = 5V, IOUT=500mA 130 180 mΩ tON Output Turn-on Delay RL=60Ω 400 µs VIN = increasing 1.6 1.9 V VUVLO UVLO Threshold VIN = decreasing 1.8 V ITH Current Limit Threshold 0.50 0.75 A ILIM Short Current Limit VOUT=0V 0.25 0.35 0.50 A tFD Over Current Flag Delay From Over Current to FLG = "L" 5 10 20 ms Tj =increasing 135 TTS Thermal Shutdown Temperature Threshold Tj =decreasing 120 IEN Enable Pin Input Current 0.01 1.00 µA VEN1 Enable Pin Input Voltage 1 VEN = increasing 2.0 V VEN2 Enable Pin Input Voltage 2 VEN = decreasing 0.8 V ILO Output Leakage Current 0.1 1.0 µA VLF Flag "L" Output Voltage ISINK = 1mA 0.4 V IFOF Flag Off Current VFLAG = 5.5V 0.01 1.00 µA (Note1) EN=L (R5523NXXXA), EN=H (R5523NXXXB) (Note2) EN=H (R5523NXXXA), EN=L (R5523NXXXB)

This explanation is based on the typical application. Over-current limit Function In case that OUT 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 equal or more than 135°C (Typ.), the switch transistor turns off because of thermal shutdown protection. In other words, when the temperature of the IC be- comes equal or more than 135°C( Typ.), both the over-current limit circuit and thermal shutdown circuit work for the protection of the IC. TEST CIRCUITS (1) Supply Current Test Circuit (2) Switch On Resistance Test Circuit 1 5

2 GND

A VEN 0.1µF 0.1µF IOUT V VON (3) Output On Time Test Circuit (4) Over-current Limit Test Circuit 1 5 0.1µF VOUT 10Ω 1 5 A VEN 0.1µF IOUT

(5) Over-current Threshold Test Circuit (6) Enable Input Voltage 0.1µF IOUT 0.1µF 100kΩ V VOUT (7) Flag Output Delay Time Test (8) UVLO Threshold Test 0.1µF 10kΩVFLG 0.1µF 100kΩ V VOUT TYPICAL APLICATION AND TECHNICAL NOTES

  • R5523N00XX VIN OUT EN GND 0.1uF R5523Nxxxx VEN FLG 10kΩ to100kΩ IN VOUT
  • Put a capacitance range from 0.1µF to 1µF bypass capacitor between IN pin and GND pin of the IC.

Without a bypass capacitor, in case of output short, because of the high side inductance of IN pin, the ringing may be generated and it might be a cause of an unstable operation.

  • Recommended pull-up resistance value range of flag pin is from 10kΩ to 100kΩ. TIMING CHART 50% 90% 50% 10% tOFF tON VEN VOUT Output On Time/Output Off Time 50% 10% tFD VEN VFLG FLG Output Delay Time TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current 2) Supply Current vs. Temperature 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 200 400 600 800 1000 1200 Output Current IOUT(mA) Output Voltage VOUT(V) -40 -20 0 20 40 60 80 100 Temperature Topt [°C] Supply Current IDD1[uA] VIN=2.2V VIN=5.5V VIN=5.5V VIN=2.2V

3) Supply Current vs. Input Voltage 4) On Resistance vs. Temperature 5) On Resistance vs. Input Voltage 6) Output On Time vs. Temperature 7) Output On Time vs. Input Voltage 8) Output Off Time vs. Temperature 22 . 533 . 544 . 555 . 5 Input Voltage V IN [V] Supply Current IDD1 [uA] 100 120 140 160 180 - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 Temperature Topt [ °C] Switch ON Resistance RON [mΩ] VIN=2.2V VIN=5.5V 100 120 140 160 180 2345 Input Voltage VIN [V] Switch ON Resistance RON [mΩ] 200 400 600 800 1000 1200 -40 -20 0 20 40 60 80 100 Temperature Topt[ °C] Output ON Time t ON[us] VIN=2.2V VIN=5.5V 200 400 600 800 1000 1200 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage VIN[V] Output ON Time t ON[us] -40°C 25°C 85°C 85°C 25°C -40°C -40°C 25°C 85°C -40 -20 0 20 40 60 80 100 Temperature Topt[°C] Output OFF Time tOFF[us] VIN=2.2V VIN=5.5V

9) Output Off Time vs. Input Voltage 10) Short-current Limit vs. Temperature 11) Short Current Limit vs. Input Voltage 12) Over Current Threshold vs. Temperature 13) Over Current Threshold vs. Input Voltage 14) Enable Input Voltage vs. Temperature 22 . 533 . 544 . 555 . 5 Input Voltage V IN[V] Output OFF Time t OFF[us] -40°C 25°C 85°C 100 200 300 400 500 600 700 800 900 1000 -40 -20 0 20 40 60 80 100 Temperature Topt [°C] Short Current Limit ILIM [mA] VDD=2.2V VDD=5.5V 500 550 600 650 700 750 800 850 900 950 1000 Input Voltage VIN [V] Short Current Limit ILIM[mA] -40°C 25°C 85°C 500 600 700 800 900 1000 1100 1200 1300 1400 1500 - 4 0 - 2 00 2 04 06 08 0 1 0 0 Temperature Topt(°C) Over Current Threshold ITH(mA) VDD=2.2V VDD=5.5V 500 600 700 800 900 1000 1100 1200 1300 1400 1500 Input Voltage VIN(V) Over Current Threshold ITH(mA) -40°C 25°C 85°C 0.0 0.4 0.8 1.2 1.6 2.0 -40 -20 0 20 40 60 80 100Temperature Topt[°C] EN Threshold VEN1/VEN2[V] VIH VIL VIN=5.0V

15) Enable Input Voltage vs. VIN Input Voltage 16) Flag Output Delay Time vs. Temperature 17) Flag Output Delay Time vs. V IN Input Voltage 18) UVLO Threshold vs. Temperature 19) UVLO Characteristic at VIn increasing 20) Turn on Response VEN=0V , CL=47µF, RL=35Ω VIN=5V , CL=47µF, RL=35Ω 4ms/div 1ms/div 0.0 0.4 0.8 1.2 1.6 2.0 22 . 533 . 544 . 555 . 5 Input Voltage VIN[V] EN Threshold Voltage VEN1/VEN2 [V] VIH VIL Topt=25°C - 4 0 - 2 00 2 04 06 08 0 1 0 0 Temperature Topt [°C] FLG Output Delay Time tFD[ms] VIN=2.2V VIN=5.5V 22 . 533 . 544 . 555 . 5 Input Voltage VIN [V] FLG Output Delay Time tFD[ms] -40°C 25°C 85°C 1.6 1.7 1.8 1.9 2.0 2.1 2.2 -40 -20 0 20 40 60 80 100 Temperature Topt[°C] UVLO Threshold VUVLO[V] VIN increasing VIN decreasing VIN (2V/div) VFLG (2V/div) VOUT (2V/div) IOUT (100mA/div) VEN (10V/div) VFLG (5V/div) VOUT (5V/div) IOUT (200mA/div)

21) Turn off Response 22) Inrush current VIN=5V , CL=47µF, RL=35Ω VIN=5V , RL=35Ω 2ms/div 1ms/div 23) Current Limit Transient Response 24) Thermal Shutdown Operation (Case: Enable to Short) VIN=5V VIN=5V, CL=47µF 2ms/div 100ms/div 25) Current Limit Transient Response 26) Zoomed in 25) (Case: Output short during enable) VIN=5V, CL=47µF VIN=5V, CL=47µF 2ms/div 100us/div ĝČĕçïø÷ĝöīİĽðç ĝčēĎçïüĝöīİĽðç ĝĖĜěçïüĝöīİĽðç ĐĖĜěçïù÷÷ĴĈöīİĽðç ĝČĕçïø÷ĝöīİĽðç ĝčēĎçïø÷ĝöīİĽðç ĐĖĜěçïù÷÷ĴĈöīİĽðç ĊēĄûþ÷Жčç ĊēĄùù÷Жčç ĊēĄø÷÷Жčç ĊēĄø÷Жčç ĝčēĎç ïüĝöīİĽð ĐĖĜěçïü÷÷ĴĈöīİĽðç VEN (5V/div) VFLGç (5V/div) IOUT (500mA/div) VFLG (5V/div) VOUT (5V/div) IOUT (500mA/div) 13.8ms VFLG (5V/div) VOUT (5V/div) IOUT (2A/div) VOUT (5V/div) IOUT (2A/div)