R5523N SERIES
USB HIGH-SIDE POWER SWITCH
NO.EA-168-071107
1
OUTLINE
The R5523N Series 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 (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 SOT23-5, high density mounting on board is
possible.
FEATURES
• Built-in P-channel MOSFET Switch
• Supply Current ......................................................Typ. 20µA (at Active Mode)
• Switch ON Resistance ........................................Typ. 130mΩ
• Output Current ......................................................Min. 500mA, Min. 250mA (2 types are available.)
• 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
R5523N
2
BLOCK DIAGRAM
IN
EN
OUT
FLG
GATE
CONTROL CURRENT
LIMIT
FLAG
DELAY
UVLO
THERMAL
SHUTDOWN
GND
SELECTION GUIDE
The output current and the logic of the enable pin for the ICs can be selected at the user’s request.
The selection can be made with designating the part number as shown below;
R5523Nxxxx-xx-x ←Part Number
↑ ↑ ↑ ↑ ↑
a b c d e
Code Contents
a Designation of Package Type:
N: SOT-23-5
b
Designation of the output current.
001: 500mA
002: 250mA (Under development)
c
Designation of the logic of the enable pin.
A: active with "L"
B: active with "H"
d Designation of Taping Type:
TR (Refer to the taping specifications.)
e Designation of composition of pin plating:
-F: Lead free plating (SOT-23-5)
R5523N
3
PIN CONFIGURATIONS
• SOT-23-5
123
4
5
(mark side)
PIN DESCRIPTION
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
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VIN Input Voltage 6.5 V
VEN Enable Pin Input Voltage −0.3 to VIN+0.3 V
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 Internal Limited
PD Power Dissipation (SOT-23-5) *Note1 420 mW
Topt Operating Temperature −40 to +85 °C
Tstg Storage Temperature −55 to +125 °C
*Note1) For Power Dissipation please refer to PACKAGE INFORMATION to be described.
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.
R5523N
4
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 VOUT=open *1 20 45
µA
IDD2 Supply Current 2 VOUT=open *2 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 ms
toff Output Turn-off Delay VIN=5V, RL=60Ω 5 ms
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 0.5 0.75 1.3 A
tFD Over Current Flag Delay From Over Current to
FLG= "L" 5 10 20 ms
TJ=increasing 135
°C
TTS Thermal Shutdown
Temperature Threshold TJ=decreasing 120
°C
IEN Enable Pin Input Current 0.01 1.0 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 VFLG=5.5V 0.01 1.0 µA
*1) EN= "L" (R5523NxxxA), EN= "H" (R5523NxxxB)
*2) EN= "H" (R5523NxxxA), EN= "L" (R5523NxxxB)
R5523N
5
• R5523N002A/B (Under Development)
(Topt=25°C)
Symbol Item Conditions MIN. TYP. MAX. Unit
VIN Input Voltage 2.2 5.5 V
IDD1 Supply Current 1 VOUT=open *1 20 45
µA
IDD2 Supply Current 2 VOUT=open *2 0.1 1.0 µA
RON Switch On Resistance VIN=5V, IOUT=500mA 130 180
mΩ
ton Output Turn-on Delay RL=60Ω 400 ms
VUVLO UVLO Threshold VIN=increasing 1.6 1.9 V
VHYS UVLO Hysteresis Range 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 °C
TTS Thermal Shutdown
Temperature Threshold Tj =decreasing 120 °C
IEN Enable Pin Input Current 0.01 1.0 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 1.0 µA
*1) EN="L" (R5523NxxxA), EN="H" (R5523NxxxB)
*2) EN="H" (R5523NxxxA), EN="L" (R5523NxxxB)
R5523N
6
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.
R5523N
7
TYPICAL APPLICATION AND TECHNICAL NOTES
• Bypass capacitor
• Put a capacitance range from 0.1µF to 1µF bypass capacitor between VIN pin and GND pin of the IC.
Without a bypass capacitor, in case of output short, because of the high side inductance of VIN pin, the
ringing may be generated and it might be a cause of an unstable operation.
• Pull-up resistance value range of flag pin
• Recommended pull-up resistance value range of flag pin is from 10kΩ to 100kΩ.
VIN OUT
EN
GND
0.1µF
R5523Nxxxx
VEN
FLG
10kΩ to100kΩ
IN VOUT
R5523N00xx
• Over-current limit Function
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 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 becomes equal or more
than 135°C( Typ.), both the over-current limit circuit and thermal shutdown circuit work for the protection of the
IC.
R5523N
8
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
TEST CIRCUITS
15
2GND
OUT
EN
FLG 4IN
V
IN
A
V
EN
3
0.1µF
15
2GND
OUTEN
FLG 4IN
V
IN
V
EN
3
0.1µF
I
OUT
VV
ON
Supply Current Test Circuit Switch On Resistance Test Circuit
R5523N
9
15
2GND
OUT
EN
FLG 4IN
V
IN
V
EN
3
0.1µF
V
OUT
10Ω
15
2GND
OUT
EN
FLG 4IN
V
IN
A
V
EN
3
0.1µF
I
OUT
Output On Time Test Circuit Over-current Limit Test Circuit
15
2GND
OUTEN
FLG 4IN
V
IN
V
EN
3
0.1µF
I
OUT
15
2GND
OUTEN
FLG 4IN
V
IN
V
EN
3
0.1µF
100kΩ
V
V
OUT
Over-current Threshold Test Circuit Enable Input Voltage
15
2GND
OUTEN
FLG 4IN
V
IN
V
EN
3
0.1µF
10kΩ
V
FLG
15
2GND
OUTEN
FLG 4IN
V
IN
V
EN
3
0.1µF
100kΩ
V
V
OUT
Flag Output Delay Time Test UVLO Threshold Test
100k
Ω
R5523N
10
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current 2) Supply Current vs. Temperature
3) Supply Current vs. Input Voltage 4) On Resistance vs. Temperature
5) On Resistance vs. Input Voltage 6) Output On Time 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)
0
5
10
15
20
25
-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
0
5
10
15
20
25
22.533.544.555.5
Input Voltage VIN [V]
Supply Current IDD1 [uA]
0
20
40
60
80
100
120
140
160
180
-40 -20 0 20 40 60 80 100
Temperature Topt [°C]
Switch ON Resistance RON [mΩ]
VIN=2.2V
VIN=5.5V
-40°C
25°C
85°C
40
60
80
100
120
140
160
180
2345
Input Voltage VIN [V]
Switch ON Resistance RON [mΩ]
0
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
85°C
25°C
-40°C
R5523N
11
7) Output On Time vs. Input Voltage 8) Output Off Time vs. Temperature
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
0
200
400
600
800
1000
1200
22.533.544.555.5
Input Voltage VIN[V]
Output ON Time t ON[us]
-40°C
25°C
85°C
0
2
4
6
8
10
12
14
-40 -20 0 20 40 60 80 100
Temperature Topt[°C]
Output OFF Time tOFF[us]
VIN=2.2V
VIN=5.5V
0
2
4
6
8
10
12
14
22.533.544.555.5
Input Voltage VIN[V]
Output OFF Time t OFF[us]
-40°C
25°C
85°C
0
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
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
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
-40 -20 0 20 40 60 80 100
Temperature Topt(°C)
Over Current Threshold ITH(mA)
VDD=2.2V
VDD=5.5V
R5523N
12
13) Over Current Threshold vs. Input Voltage 14) Enable Input Voltage vs. Temperature
15) Enable Input Voltage vs. VIN Input Voltage 16) Flag Output Delay Time vs. Temperature
17) Flag Output Delay Time vs. VIN Input Voltage 18) UVLO Threshold vs. Temperature
500
600
700
800
900
1000
1100
1200
1300
1400
1500
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
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 80 100
Temperature Topt[°C]
EN Threshold VEN1/VEN2[V]
VIH
VIL
VIN=5.0V
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
0
2
4
6
8
10
12
14
16
18
20
-40 -20 0 20 40 60 80 100
Temperature Topt [°C]
FLG Output Delay Time tFD[ms]
VIN=2.2V
VIN=5.5V
0
2
4
6
8
10
12
14
16
18
20
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
R5523N
13
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
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
VIN (2V/div)
VFLG (2V/div)
VOUT (2V/div)
IOUT (100mA/div)
VEN (10V/div)
VFLG (5V/div)
VOUT (5V/div)
IOUT (200mA/div)
VEN (10V/div)
VFLG (5V/div)
VOUT (5V/div)
IOUT (200mA/div)
VEN (10V/div)
VFLG (10V/div)
IOUT (200mA/div)
CL=470µF
CL=220µF
CL=100µF
CL=10
µ
F
VFLG (5V/div)
IOUT (500mA/div)
VEN (5V/div)
VFLG (5V/div)
IOUT (500mA/div)
VFLG (5V/div)
VOUT (5V/div)
IOUT (500mA/div)
13.8ms
R5523N
14
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
VFLG (5V/div)
VOUT (5V/div)
IOUT (2A/div)
VOUT (5V/div)
IOUT (2A/div)
PACKAGE INFORMATION PE-SOT-23-5-0610
• SOT-23-5 (SC-74A) Unit: mm
PACKAGE DIMENSIONS
2.9±0.2
0.4±0.1
1.9±0.2
(0.95) (0.95)
54
123
+0.2
−0.1
1.6
+0.2
−0.1
1.1
+0.1
−0.05
0.15
2.8±0.3
0 to 0.1
0.8±0.1
0.2 Min.
TAPING SPECIFICATION
2.0Max.
0.3±0.1
4.0±0.1
2.0±0.05
4.0±0.1
3.3
3.2
8.0±0.3
1.75±0.1
3.5±0.05
φ1.5+0.1
0
∅1.1±0.1
TR
User Direction of Feed
TAPING REEL DIMENSIONS REUSE REEL (EIAJ-RRM-08Bc)
(1reel=3000pcs)
2±0.5
11.4±1.0
9.0±0.3
13±0.2
∅
60
∅+1
0
180
∅0
−1.5
21±0.8
PACKAGE INFORMATION PE-SOT-23-5-0610
POWER DISSIPATION (SOT-23-5)
This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board.
This specification is based on the measurement at the condition below:
(Power Dissipation (SOT-23-5) is substitution of SOT-23-6.)
Measurement Conditions
Standard Land Pattern
Environment Mounting on Board (Wind velocity=0m/s)
Board Material Glass cloth epoxy plactic (Double sided)
Board Dimensions 40mm × 40mm × 1.6mm
Copper Ratio Top side : Approx. 50% , Back side : Approx. 50%
Through-hole φ0.5mm × 44pcs
Measurement Result
(Topt=25°C,Tjmax=125°C)
Standard Land Pattern Free Air
Power Dissipation 420mW 250mW
Thermal Resistance θja=(125−25°C)/0.42W=263°C/W 400°C/W
0 50 10025 75 85 125 150
Ambient Temperature (°C)
0
200
100
300
400
250
420
500
600
Power Dissipation P
D
(mW)
On Board
Free Air
40
40
Power Dissipation Measurement Board Pattern
IC Mount Area Unit : mm
RECOMMENDED LAND PATTERN
0.7 MAX.
0.95
0.95
1.9
2.4
1.0
(Unit: mm)
