RICOH R5523N

R5523N_E/2006/05/12
USB HIGH-SIDE POWER SWITCH
R5523N SERIES
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
1
R5523N
BLOCK DIAGRAM
IN
OUT
GATE
CONTROL
EN
CURRENT
LIMIT
FLAG
DELAY
FLG
UVLO
THERMAL
SHUTDOWN
GND
SELECTION GUIDE
In the R5523N Series, output current and the logic of the enable pin can be designated.
Part Number is designated as follows:
R5523Nxxxx-TR ← Part Number
↑↑ ↑
abc
Code
Description
Designation of the output current.
a
001: 500mA
002: 250mA (Under development)
Designation of the logic of the enable pin.
b
A: active with "L"
B: active with "H"
c
2
Designation of the taping type.
TR (Refer to the taping specifications.)
R5523N
PIN CONFIGURATION
SOT23-5
4
5
1
2
3
ABSOLUTE MAXIMUM RATINGS
Topt=25°C
Symbol
VIN
VEN
Item
Input Voltage
Enable Pin Input
Voltage
Ratings
Unit
6.5
V
-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 Temperature
Tstg
Storage Temperature
-40 ~ +85
°C
-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.
3
R5523N
PIN DESCRIPTION
Pin No.
Symbol
description
1
EN
Enable Pin
2
GND
Ground Pin
3
FLG
FLG pin (Open Drain Output)
4
VIN
5
VOUT
Power Supply Pin
Output pin
ELECTRICAL CHARACTERISTICS
• R5523N001A/B
Symbol
Item
Conditions
Min.
Typ.
Max.
Unit
5.5
V
VIN
Input Voltage
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
1.9
V
VHYS
UVLO Hysteresis Range
VIN = decreasing
0.1
V
ITH
Current Limit Threshold
ILIM
Short Current Limit
VOUT=0V
tFD
Over Current Flag Delay
From Over Current to FLG = "L"
Thermal Shutdown
Tj =increasing
135
Temperature Threshold
Tj =decreasing
120
TTS
IEN
2.2
1.6
1.0
1.5
A
0.50
0.75
1.30
A
5
10
20
ms
Enable Pin Input Current
0.01
VEN1
Enable Pin Input Voltage 1
VEN = increasing
VEN2
Enable Pin Input Voltage 2
VEN = decreasing
ILO
Output Leakage Current
VLF
Flag "L" Output Voltage
IFOF
4
Topt=25°C
Flag Off Current
1.00
µA
V
2.0
0.1
ISINK = 1mA
VFLAG = 5.5V
°C
0.01
0.8
V
1.0
µA
0.4
V
1.00
µA
R5523N
• R5523N002A/B
Symbol
Topt=25°C
Item
Conditions
Min.
Typ.
Unit
5.5
V
VIN
Input Voltage
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
1.9
V
1.8
V
VUVLO
UVLO Threshold
2.2
Max.
VIN = increasing
1.6
VIN = decreasing
ITH
Current Limit Threshold
ILIM
Short Current Limit
VOUT=0V
tFD
Over Current Flag Delay
From Over Current to FLG = "L"
Thermal Shutdown
Tj =increasing
135
Temperature Threshold
Tj =decreasing
120
TTS
IEN
0.75
A
0.25
0.35
0.50
A
5
10
20
ms
Enable Pin Input Current
0.01
VEN1
Enable Pin Input Voltage 1
VEN = increasing
VEN2
Enable Pin Input Voltage 2
VEN = decreasing
ILO
Output Leakage Current
VLF
Flag "L" Output Voltage
IFOF
0.50
Flag Off Current
1.00
µA
V
2.0
0.1
ISINK = 1mA
VFLAG = 5.5V
°C
0.01
0.8
V
1.0
µA
0.4
V
1.00
µA
(Note1) EN=L (R5523NXXXA), EN=H (R5523NXXXB)
(Note2) EN=H (R5523NXXXA), EN=L (R5523NXXXB)
5
R5523N
OPERATION
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 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.
TEST CIRCUITS
(1) Supply Current Test Circuit
(2) Switch On Resistance Test Circuit
IOUT
VEN
1
EN
2
GND
3
FLG
OUT
5
VEN
IN
4
A
1
EN
OUT
2
GND
3
FLG
5
V VON
IN
4
VIN
VIN
0.1µF
0.1µF
(3) Output On Time Test Circuit
(4) Over-current Limit Test Circuit
IOUT
VOUT
1
OUT
EN
5
1
EN
2
GND
3
FLG
OUT
5
IN
4
A
10Ω
VEN
2
GND
3
FLG
VEN
IN
4
VIN
0.1µF
6
VIN
0.1µF
R5523N
(5) Over-current Threshold Test Circuit
(6) Enable Input Voltage
IOUT
1
EN
OUT
100kΩ
5
1
EN
OUT
5
V
VEN
2
GND
3
FLG
VEN
IN
4
2
GND
3
FLG
VOUT
IN
4
VIN
VIN
0.1µF
0.1µF
(7) Flag Output Delay Time Test
1
EN
(8) UVLO Threshold Test
OUT
5
100kΩ
1
VEN
2
OUT
5
GND
V
VEN
3
EN
FLG
IN
GND
3
FLG
4
IN
4
VIN
0.1µF
VFLG
2
VOUT
VIN
10kΩ
0.1µF
TYPICAL APLICATION AND TECHNICAL NOTES
• R5523N00XX
10kΩ to100kΩ
VEN
FLG
EN
VIN
IN
R5523Nxxxx
OUT
VOUT
GND
0.1uF
• Put a capacitance range from 0.1µF to 1µF bypass capacitor between IN pin and GND pin of the IC.
7
R5523N
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%
VEN
50%
tOFF
tON
90%
VOUT
10%
Output On Time/Output Off Time
10%
FLG Output Delay Time
tFD
50%
VEN
VFLG
TYPICAL CHARACTERISTICS
1)
Output Voltage vs. Output Current
2)
6.0
Output Voltage VOUT(V)
Supply Current IDD1[uA]
25
5.0
VIN=5.5V
4.0
3.0
VIN=2.2V
2.0
1.0
0.0
0
200
400
600
800
Output Current IOUT(mA)
8
Supply Current vs. Temperature
1000
1200
20
15
10
VIN=2.2V
VIN=5.5V
5
0
-40
-20
0
20
40
60
Temperature Topt [°C]
80
100
R5523N
3) Supply Current vs. Input Voltage
4)
180
Switch ON Resistance R ON [mΩ]
Supply Current I DD1 [uA]
25
85°C
20
25°C
15
-40°C
10
5
0
160
140
120
100
80
60
VIN=2.2V
40
VIN=5.5V
20
0
2
2.5
3
3.5
4
4.5
Input Voltage VIN [V]
5
5.5
On Resistance vs. Input Voltage
-40
6)
1200
160
1000
ON[us]
180
140
85°C
120
25°C
100
80
-40°C
60
3
4
Input Voltage VIN [V]
100
VIN=2.2V
VIN=5.5V
600
400
200
-40
5
-20
0
20
40
60
80
100
Temperature Topt[°C]
Output On Time vs. Input Voltage
8)
Output Off Time vs. Temperature
14
1200
12
1000
-40°C
800
Output OFF Time tOFF[us]
ON[us]
80
0
2
Output ON Time t
0
20
40
60
Temperature Topt [°C]
800
40
7)
-20
Output On Time vs. Temperature
Output ON Time t
Switch ON Resistance R ON [mΩ]
5)
On Resistance vs. Temperature
25°C
600
85°C
400
200
0
VIN=2.2V
10
VIN=5.5V
8
6
4
2
0
2
2.5
3
3.5
4
4.5
Input Voltage VIN[V]
5
5.5
-40
-20
0
20
40
60
Temperature Topt[°C]
80
100
9
R5523N
9) Output Off Time vs. Input Voltage
10) Short-current Limit vs. Temperature
1000
12
10
8
85°C
6
25°C
4
-40°C
2
900
Short Current Limit ILIM [mA]
Output OFF Time t
OFF[us]
14
800
700
600
500
400
100
0
2
2.5
3
3.5
4
4.5
Input Voltage VIN[V]
5
5.5
-40°C
800
750
700
650
25°C
85°C
600
550
500
2.0
2.5
3.0 3.5 4.0 4.5
Input Voltage VIN [V]
5.0
14)
EN Threshold VEN1/VEN2[V]
1300
-40°C
1000
25°C
900
800
85°C
700
600
2.5
3.0
3.5
4.0
4.5
Input Voltage VIN(V)
100
VDD=5.5V
-20
5.0
5.5
0
20
40
60
Temperature Topt(°C)
80
100
Enable Input Voltage vs. Temperature
VIN=5.0V
2.0
1400
1100
80
VDD=2.2V
-40
1500
1200
0
20
40
60
Temperature Topt [°C]
1500
1400
1300
1200
1100
1000
900
800
700
600
500
5.5
13) Over Current Threshold vs. Input Voltage
500
2.0
-20
12) Over Current Threshold vs. Temperature
1000
950
900
850
-40
Over Current Threshold ITH(mA)
Short Current Limit ILIM[mA]
11) Short Current Limit vs. Input Voltage
Over Current Threshold ITH(mA)
VDD=5.5V
200
0
10
VDD=2.2V
300
1.6
1.2
0.8
VIH
VIL
0.4
0.0
-40
-20
0
20
40
60
Temperature Topt[°C]
80
100
R5523N
15) Enable Input Voltage vs. VIN Input Voltage
16) Flag Output Delay Time vs. Temperature
20
EN Threshold Voltage VEN1/VEN2
[V]
FLG Output Delay Time tFD[ms]
Topt=25°C
2.0
1.6
1.2
0.8
VIH
0.4
VIL
0.0
16
14
12
10
8
6
VIN=2.2V
4
VIN=5.5V
2
0
2
2.5
3
3.5
4
4.5
Input Voltage VIN[V]
5
5.5
17) Flag Output Delay Time vs. VIN Input Voltage
-40
-20
0
20
40
60
Temperature Topt [°C]
80
100
18) UVLO Threshold vs. Temperature
20
2.2
18
-40°C
16
UVLO Threshold VUVLO[V]
FLG Output Delay Time tFD[ms]
18
25°C
14
85°C
12
10
8
6
4
2
0
2
2.5
3
3.5
4
4.5
Input Voltage VIN [V]
19) UVLO Characteristic at VIn increasing
VEN=0V, CL=47µF, RL=35Ω
VIN (2V/div)
5
5.5
2.1
2.0
VIN increasing
1.9
1.8
VIN decreasing
1.7
1.6
-40
-20
0
20
40
60
Temperature Topt[°C]
80
100
20) Turn on Response
VIN=5V, CL=47µF, RL=35Ω
VEN (10V/div)
VFLG (2V/div)
VFLG (5V/div)
VOUT (2V/div)
VOUT (5V/div)
IOUT (100mA/div)
IOUT (200mA/div)
4ms/div
1ms/div
11
R5523N
21) Turn off Response
22) Inrush current
VIN=5V, CL=47µF, RL=35Ω
VIN=5V, RL=35Ω
VEN (10V/div)
VEN (10V/div)
VFLG (10V/div)
VFLG (5V/div)
CL=470μF
CL=220μF
VOUT (5V/div)
CL=100μF
IOUT (200mA/div)
IOUT (200mA/div)
2ms/div
CL=10μF
1ms/div
23) Current Limit Transient Response
(Case: Enable to Short)
24) Thermal Shutdown Operation
VIN=5V
2ms/div
VIN=5V, CL=47µF
100ms/div
VEN (5V/div)
VFLG (5V/div)
VFLG (5V/div)
13.8ms
VOUT (5V/div)
VFLG (5V/div)
IOUT (500mA/div)
(500mA/div)
IIOUT
OUT (500mA/div)
25) Current Limit Transient Response
(Case: Output short during enable)
VIN=5V, CL=47µF
VFLG (5V/div)
26) Zoomed in 25)
VIN=5V, CL=47µF
VOUT (5V/div)
VOUT (5V/div)
IOUT (2A/div)
IOUT (2A/div)
2ms/div
12
100us/div