RICOH R5524N Technical data
R5524N SERIES
USB HIGH-SIDE POWER SWITCH
NO.EA-188-111212
OUTLINE
The R5524N series is CMOS-based high-side MOSFET switch ICs for Universal Serial Bus (USB) applications. Using Nch FET as a switching transistor, low ON resistance (Typ.100mΩ) and reverse current protection is possible.
An Over-current limit circuit, a thermal shutdown circuit, and an under voltage lockout circuit (UVLO) 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.
In order to support easy power-line design, the over-current level is highly accurate.
The R5524N 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
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N-channel MOS High-Side switch IC |
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• Switch ON Resistance ........................................ |
Typ. 100mΩ (5V input) |
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Current Limit Threshold ........................................ |
Min. 650mA (001A/B, 002A/B), Min.1.25A (004A) |
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Over-current Limit ................................................. |
Min. 550mA |
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Flag Delay Time .................................................... |
Typ. 20ms. |
•Built-in under-voltage lockout circuit (UVLO)
•Built-in Thermal Shutdown Circuit
•Built-in Reverse current protection circuit
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Package ................................................................ |
SOT-23-5 |
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Built-in Soft-start Function |
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APPLICATIONS
•PCs and PC peripherals
•Digital Televisions (DTV)
•Set Top Boxes (STB)
•Printers
•PDA
•Game Consoles
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R5524N
BLOCK DIAGRAM
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R5524NxxxA |
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VIN |
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VOUT |
EN |
GATE |
CURRENT |
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CONTROL |
LIMIT |
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UVLO |
FLG DELAY |
FLG |
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THERMAL |
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SHUTDOWN |
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GND |
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R5524NxxxB |
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VI N |
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VOU T |
EN |
GATE |
CURRENT |
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CONTROL |
LIMIT |
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UVLO |
FLG DELAY |
FLG |
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THERMAL |
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SHUTDOWN |
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GND |
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R5524N
SELECTION GUIDE
The over-current limit protection type,the Current Limit Threshold and the auto discharge function for the ICs can be selected at the user’s request.
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Product Name |
Package |
Quantity per Reel |
Pb Free |
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Halogen Free |
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R5524N00x -TR-FE |
SOT-23-5 |
3,000 pcs |
Yes |
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Yes |
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x : Select the combination of the over-current limit protection type and Current Limit Threshold. |
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1 |
: Latch Off Type Current Limit Threshold Min.650mA |
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2 |
: Constant Current Type Current Limit Threshold Min.650mA |
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4 : Constant Current Type Current Limit Threshold Min.1.25A B Version for R5524N004 is not available.
: Auto discharge function at off state are options as follows.
(A) with auto discharge function at off state
(B) without auto discharge function at off state
PIN CONFIGURATIONS
• SOT-23-5
5 4
(mark side)
1 2 3
PIN DESCRIPTION
Pin No |
Symbol |
Pin Description |
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1 |
VIN |
Input Pin |
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2 |
GND |
Ground Pin |
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3 |
EN |
Enable Pin ("H" active) |
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4 |
FLG |
FLG pin (Open Drain Output) |
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5 |
VOUT |
Output Pin |
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3
R5524N
ABSOLUTE MAXIMUM RATINGS
Symbol |
Item |
Rating |
Unit |
VIN |
Input Voltage |
6.0 |
V |
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VEN |
Enable Pin Input Voltage |
−0.3 to 6.0 |
V |
VFLG |
Flag Voltage |
−0.3 to 6.0 |
V |
IFLG |
Flag Current |
14 |
mA |
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VOUT |
Output Voltage |
−0.3 to 6.0 |
V |
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IOUT |
Output Current |
Internal Limited |
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PD |
Power Dissipation (SOT-23-5) * |
420 |
mW |
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Topt |
Operating Temperature |
−40 to 85 |
°C |
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Tstg |
Storage Temperature |
−55 to 125 |
°C |
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*) For Power Dissipation please refer to PACKAGE INFORMATION to be described.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time 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.
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R5524N
ELECTRICAL CHARACTERISTICS
• R5524N
Topt=25°C
Symbol |
Item |
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Conditions |
Min. |
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Typ. |
Max. |
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Unit |
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VIN |
Input Voltage |
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V |
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2.7 |
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5.5 |
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IDD1 |
Supply Current (Active Mode) |
VOUT=OPEN,EN=”H”,VIN=5V |
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110 |
180 |
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μA |
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IDD2 |
Supply Current |
VOUT=OPEN,EN=”L”,VIN=5V |
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0.1 |
1.0 |
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μA |
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(Standby Mode) |
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RON |
Switch On Resistance |
VIN=5V, IOUT 500mA |
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100 |
150 |
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mΩ |
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ton |
Output Turn-on Delay |
VIN=5V, RL=60Ω |
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400 |
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μs |
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toff |
Output Turn-off Delay |
VIN=5V, RL=60Ω |
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50 |
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μs |
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VUVLO |
UVLO Released Voltage |
VIN=increasing |
2.3 |
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2.5 |
2.7 |
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V |
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VHYS |
UVLO Hysteresis Range |
VIN=decreasing |
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0.1 |
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V |
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001A/001B |
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VIN=5V |
650 |
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800 |
980 |
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mA |
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002A/002B |
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ITH |
Current Limit Threshold |
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004A |
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VIN=5V |
1.25 |
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1.55 |
1.85 |
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A |
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VIN=5V,Topt=0 ~ 70°C |
1.2 |
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1.55 |
1.9 |
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ILIM |
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VIN=5V, 5ms after VOUT=0V |
550 |
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650 |
800 |
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mA |
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tFD |
Flag Delay Time*1 |
VIN=5V, From Over Current to |
7 |
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20 |
30 |
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ms |
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FLG=”L” |
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TTSD |
Thermal Shutdown |
Junction Temperature |
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135 |
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Temperature |
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TTSR |
Thermal Shutdown |
Junction Temperature |
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120 |
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Released Temperature |
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IEN |
Enable Pin Input Current |
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0.01 |
1.0 |
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μA |
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VEN1 |
Enable Pin Input Voltage 1 |
VEN=increasing |
2.0 |
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6.0 |
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V |
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VEN2 |
Enable Pin Input Voltage 2 |
VEN=decreasing |
-0.3 |
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0.8 |
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V |
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ILO |
Output Leakage Current |
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0.1 |
1.0 |
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μA |
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VLF |
Flag "L" Output Voltage |
ISINK=1mA |
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0.4 |
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V |
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IFOF |
Flag Off Current |
VFLG=5.5V |
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0.01 |
1.0 |
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μA |
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IREV |
Reverse Leakage Current |
VIN=0V, VOUT=5.5V |
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50 |
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μA |
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RLOW |
Nch. On Resistance for |
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450 |
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Ω |
Auto Discharge (A Version) |
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*1) Flag delay time depends on input voltage.
The specification in |
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is checked and guaranteed by design engineering. |
All of unit are tested and specified under load conditions such that Tj≈Topt=25°C except for Thermal Shutdown item.
5
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