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RYC8520L

型号：

RYC8520L

品牌：

OKI[ OKI ELECTRONIC COMPONETS ]

页数：

7 页

PDF大小：

210 K

下载PDF手册
Power Management ICs  
Document: SCD 25862  
Status: Released  
Rev. B  
RYC852x  
Single Channel Protected Power Switch  
Date: APRIL 29, 2005  
GENERAL DESCRIPTION  
FEATURES  
The RYC852x is single channel protected power  
switch designed for USB and other 5 Volt high-  
side power switched applications. The output  
MOSFET typically has a low on resistance of  
110mΩ. The RYC852x provides current limiting  
and over-temperature protection. RYC852x has  
a deglitched fault flag to minimize nuisance  
tripping when high inrush current devices are  
plugged into the port. The RYC852x also  
features under-voltage lockout, soft start and  
reverse current blocking when disabled.  
•
•
•
Compliant to USB1.1 and USB2.0 specifications  
Low on-resistance, typical 110 mΩ  
Fast overcurrent shut down minimizes peak inrush  
current  
Built-in flag deglitch to minimize nuisance trip  
Overtemperature shutdown  
Reverse current blocking  
Undervoltage lockout (UVLO)  
Small 6pin SOT-23 package  
•
•
•
•
•
APPLICATIONS  
•
•
•
•
•
•
USB peripherals  
USB OTG  
Notebook PCs  
PDAs  
PC card hot swap  
General purpose power switches  
TYPICAL APPLICATION SCHEMATIC  
Vcc  
CIN  
50kΩ  
RYC852x  
VOUT  
µ
1
F
VIN  
EN  
FLG  
GND  
COUT  
100 µF  
Oki Semiconductor  
www.okisemi.com/us  
1 of 7  
Power Management ICs  
Document: SCD 25862  
Status: Released  
Rev. B  
RYC852x  
Single Channel Protected Power Switch  
Date: APRIL 29, 2005  
ORDERING INFORMATION  
Part Description  
Part Number  
Enable Logic  
Continuous  
Current (A)  
0.6  
Package  
Tape and Reel  
Quantity  
RYC8520H  
RYC8520L  
A20930-000  
E49332-000  
Active High  
Active Low  
SOT-23-6  
SOT-23-6  
2,500 pcs  
2,500 pcs  
0.6  
Note: Other current may be available, please contact factory  
MATERIALS INFORMATION  
ROHS Compliant  
ELV Compliant  
Pb-Free  
PIN CONFIGURATION  
6
4
5
EN  
IN  
NC  
OUT  
FLG  
GND  
1
2
3
PIN DESCRIPTION  
Pin Number  
Pin Name  
Pin Function  
1
FLG  
Fault Flag (Output): Active-low open-drain output. Indicate overcurrent, UVLO  
and thermal shutdown.  
2
3
GND  
OUT  
Ground: Supply return.  
Switch Output: Output MOSFET source. Typically connect to switched side of  
load.  
4
5
6
NC  
IN  
No connection.  
Supply Input: Output MOSFET drain. Also supplies IC’s internal circuitry.  
Connect to positive supply.  
Enable (Input): Logic-compatible enable input. High input > 2.4V. Low input <  
0.8V (H-active high, L-active low). Do not float.  
EN  
Oki Semiconductor  
www.okisemi.com/us  
2 of 7  
Power Management ICs  
Document: SCD 25862  
Status: Released  
Rev. B  
RYC852x  
Single Channel Protected Power Switch  
Date: APRIL 29, 2005  
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)  
Parameter  
Symbol  
VIN  
Value  
-0.3 to +6  
-0.3 to +6  
+6  
Units  
V
Max main supply voltage  
Max voltage, all I/O pins  
Output voltage  
VIN  
V
VOUT  
IOUT  
V
Output current  
Internally limited  
A
Control input  
VEN  
V
− 0.3 to Vin+0.3  
− 65 to +150  
260  
Storage temperature  
Max lead temperature during soldering (5 sec.)  
TS  
°C  
°C  
Note 1. Operation beyond absolute maximum rating or improper use may result in permanent damage to the device. Exposure to absolute  
maximum rating conditions for extended periods or to conditions beyond absolute maximum rating conditions may adversely affect  
device reliability. Functional operation under absolute maximum rating conditions is not implied.  
Note 2. Devices are ESD sensitive. Handling precautions recommended. .  
OPERATING RATINGS (Note 3)  
Parameter  
Symbol  
Value  
Units  
Supply voltage  
VIN  
+4.5 to +5.5  
V
Continuous output current  
IOUT  
TA  
0.6  
-40 to +85  
240  
A
Ambient operating temperature  
Thermal resistance (5pin SOT-23), Note 5  
°C  
°C/W  
θ JA  
Note 3. The device is not designed to function outside its operating rating.  
ELECTRICAL CHARACTERISTICS (VIN = +5V; TA = 25°C; unless noted.)  
Power Switch  
Condition  
Min  
Typ  
110  
0.5  
Max  
Units  
mΩ  
ms  
Pin to Pin Resistance  
Output Turn-On Time  
Output Turn-Off Time  
VIn = 5V, I OUT = 500mA  
RL = 50 Ω, CL = 1µF, sum of delay+ rise time.  
RL = 50 Ω, CL = 1µF, sum of delay+ fall time  
150  
µs  
Current Limit  
Condition  
Min  
Typ  
Max  
Units  
Short-circuit Current Limit  
0.6  
1.0  
1.25  
A
RYC8520, Short circuit applied to the output pin of EN device with 0.5Ω  
load  
Short-circuit response time  
Short-circuit applied to the output pin ('Hot-plugged short') VOUT = 5.0V,  
RL = 0.5Ω, Note 5  
1
µs  
Enable Input  
Enable Input Threshold  
Condition  
Min  
Typ  
1.5  
1.5  
Max  
2.4  
Units  
V
V
µA  
pF  
Low-to-high transition, Note 4  
High-to-low transition, Note 4  
VEN = 0V to 5.5V  
0.8  
Enable Input Current  
Enable Input Capacitance  
0.01  
1
5
Note 5  
Leakage Current  
Supply Current  
Condition  
Min  
Typ  
6
100  
1
Max  
15  
200  
20  
Units  
µA  
µA  
Switch disabled, OUT =open  
Switch on, OUT = open  
Output disabled  
Output Leakage Current  
0.01  
µA  
Overtemperature and UVLO Condition  
Min  
Typ  
130  
120  
2.4  
Max  
Units  
°C  
°C  
V
Overtemperature Shutdown  
Threshold  
TJ increasing, Note 5  
TJ decreasing, Note 5  
VIn = increasing  
UVLO Threshold  
VIn = decreasing  
2.2  
V
Oki Semiconductor  
www.okisemi.com/us  
3 of 7  
Power Management ICs  
Document: SCD 25862  
Status: Released  
Rev. B  
RYC852x  
Single Channel Protected Power Switch  
Date: APRIL 29, 2005  
Error Flag  
Condition  
VIn = 5V, IL = 10mA, open drain  
VFLAG = 5V  
Min  
Typ  
50  
0.01  
10  
Max  
100  
1
Units  
Ω
µA  
Error Flag Output Resistance  
Error Flag Off Current  
Error flag output deglitch  
Fault on overcurrent, UVLO and thermal shutdown, Note 6  
20  
ms  
Note 4. VIN should be within the operating range before the device is enabled.  
Note 5. Validated by design, but not production tested.  
Note 6. No error flag out deglitch on UVLO and thermal shutdown.  
TYPICAL CHARACTERISTICS  
Figure 1. Test Circuit and Timing Diagram  
Figure 2. Turn-on Delay Time  
VIN = 5V, RL = 50 Ω  
Time (200 µs/div)  
VEN  
(5V/div)  
OUT  
tr  
tf  
RL  
CL  
90% 90%  
VOUT  
VFLG  
(5V/div)  
10%  
10%  
Output rise and fall  
time  
Test Circuit  
VOUT  
(5V/div)  
50%  
50% 50%  
50%  
90%  
VEN  
VEN  
tON  
tOFF  
tON  
tOFF  
90%  
VOUT  
VOUT  
IOUT  
10%  
10%  
(0.5A/div)  
Active-low switch delay  
time  
Active-high switch delay  
time  
FUNCTIONAL DESCRIPTION  
The RYC852x is single channel protected power switches designed for USB and other 5 Volt high-side power  
switched applications. The output MOSFET has a low on resistance of typical 110mΩ. The RYC852x provides  
current limiting and over-temperature protection. RYC852x has a deglitched fault flag to minimize nuisance tripping  
when high inrush current devices are plugged into the port. The RYC852x also features under-voltage lockout, soft  
start and reverse current blocking when disabled.  
Current Limit and Overtemperature  
Oki Semiconductor  
www.okisemi.com/us  
4 of 7  
Power Management ICs  
Document: SCD 25862  
Status: Released  
Rev. B  
RYC852x  
Single Channel Protected Power Switch  
Date: APRIL 29, 2005  
The current limit is 0.6A minimum and 1.25A maximum for the RYC8520. When the current limit is exceeded, the  
device will first limit the current and then, if necessary, will go into thermal shutdown when the die temperature  
reaches approximately 130°C. When the temperature falls 10°C below the thermal shutdown temperature, the  
device will restart. If the fault has not been removed, the device will continue to cycle on and off. The frequency of  
the cycle is dependent on the impedance of the fault and the thermal environment.  
Enable Pull Up/Down  
The EN input is logic level compatible. The enable pin should not be allowed to float; a pull-up/down resistor should  
be used to tie the pin high/low.  
Fault Flag  
The fault flag signal is asserted low when an overcurrent, overtemperature or undervoltage event occurs. In the  
event of an overcurrent, the fault flag is deglitched for approximately 10 ms to minimize nuisance tripping. The FLAG  
pin is an open drain design and will require a pull-up resistor.  
Undervoltage lockout (UVLO)  
If the supply voltage drops below approximately 2.2V the RYC852x will turn off. The undervoltage limit protects the  
hub from operating at voltages too low to assure reliable logic operation.  
Soft Start  
When the device is first enabled into a load, the device is turned on slowly and requires 0.5 ms to reach 90% of the  
maximum voltage.  
Oki Semiconductor  
www.okisemi.com/us  
5 of 7  
Power Management ICs  
Document: SCD 25862  
Status: Released  
Rev. B  
RYC852x  
Single Channel Protected Power Switch  
Date: APRIL 29, 2005  
APPLICATION INFORMATION  
Input Capacitor  
Decoupling input capacitors (0.1 µF) should be used to tie the VIN pin to ground to minimize voltage transients.  
Input transients which exceed the absolute maximum rating may cause damage to the device.  
Output Capacitors  
Decoupling capacitors (0.1 µF) between the output and ground are also recommended to reduce the impact of other  
voltage transients such as ESD. Output capacitors will help minimize negative voltage spikes due to parasitic  
inductance. USB specifications require 120 µF of low ESR output capacitance per hub.  
Vcc  
CIN  
50kΩ  
RYC852x  
1 µF  
VOUT  
FLG  
VIN  
EN  
GND  
COUT  
100 µF  
Oki Semiconductor  
www.okisemi.com/us  
6 of 7  
Power Management ICs  
Document: SCD 25862  
Status: Released  
Rev. B  
RYC852x  
Single Channel Protected Power Switch  
Date: APRIL 29, 2005  
PACKAGE INFORMATION  
6 Pin SOT-23 PACKAGE NOTES:  
1. Dimensions and tolerance per ANSI Y14.5M-1982.  
2. Dimensions A and B are datums and T is a datum surface.  
3. Controlling dimensions: Millimeters  
4. Dimension A and B do not include mold flash. Mold flash shall not exceed 0.15mm [0.006] per side.  
5. Dimension D does not include interlead flash. Interlead flash shall not exceed 0.25 mm [0.010].  
Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of each product for  
their applications. Oki Semiconductor assumes no responsibility for the use of its product or for any infringement of patents or other rights of third  
parties resulting from the use of its product. No license is granted by implication or otherwise under any patent or proprietary right of Oki  
Semiconductor except the right to use such product for the purpose for which it is sold. Oki Semiconductor reserves the right to change or  
update, without notice, any information contained in this publication; to change, without notice, the design, construction, processing, or  
specification of any product; and to discontinue or limit production or distribution of any product. This publication supersedes and replaces all  
information previously supplied. Without express written consent by an officer of Oki Semiconductor, Oki Semiconductor does not authorize the  
use of any its products as components in nuclear facility applications, aerospace, or in critical life support devices or systems. Oki  
Semiconductor’ only obligations are those in the Oki Semiconductor Standard Terms and Conditions of Sale and in no case will Oki  
Semiconductor be liable for any incidental, indirect, or consequential damages arising from the sale, resale, use, or misuse of its products.  
© 2006 Oki Semiconductor  
Oki Semiconductor  
www.okisemi.com/us  
7 of 7  
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