BD6520F_11 [ROHM]
Load Switch ICs for Portable Equipment; 用于便携式设备的负载开关IC
| 型号： | BD6520F_11 |
| 厂家： | 
ROHM |
| 描述： | Load Switch ICs for Portable Equipment |
| 文件： | 总17页 (文件大小：422K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Power Management Switch ICs for PCs and Digital Consumer Products
Load Switch ICs
for Potable Equipment
No.11029EBT12
BD6520F,BD6522F
●Description
The power switch for expansion module is a power management switch having one circuit of N-channel Power MOS FET.
The switch realizes 50mΩ(Typ.) ON resistance. The switch turns on smoothly by the built-in charge pump, therefore, it is
possible to reduce inrush current at switch on. And soft start control by external capacitor is available.
Further, it has a discharge circuit that discharges electric charge from capacitive load at switch off, Under voltage lockout
circuit, and a thermal shutdown circuit.
●Features
1) Low on resistance (50mΩ, Typ.) N-MOS switch built in
2) Maximum output current: 2A
3) Discharge circuit built in
4) Soft start control circuit built in
5) Under voltage lockout (UVLO) circuit built in
6) Thermal shutdown (Output off latching)
7) Reverse current flow blocking at switch off (only BD6522F)
●Applications
Notebook PC, PC peripheral device, etc.
●Lineup
Parameter
BD6520F
to 5.5V
2A
BD6522F
to 5.5V
2A
Supply Voltage
Switch current
On Resistance
OUT Rise Time
OUT Fall Time
Package
3
3
50mΩ
2000µs
3µs
50mΩ
1000µs
4µs
SOP8
-
SOP8
○
Reverse current flow blocking at switch off
●Absolute Maximum Ratings
Parameter
Supply Voltage
Symbol
VDD
Ratings
Unit
-0.3 to 6.0
-0.3 to 6.0
V
V
CTRL Input Voltage
VCTRL
-0.3 to VDD + 0.3 (BD6520F)
-0.3 to 6.0 (BD6522F)
-55 to 150
V
Switch Output Voltage
VOUT
V
Storage temperature
Power dissipation
TSTG
Pd
℃
mW
560*1
*1
*
*
This value decreases 4.48mW/℃ above Ta=25℃
Resistance radiation design is not doing.
Operation is not guaranteed.
●Operation conditions
Parameter
Ratings
3.0 to 5.5
0 to 2
Symbol
VDD
Unit
V
Supply Voltage
Switch current
IOUT
A
Operating Temperature
TOPR
-25 to 85
℃
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
1/16
Technical Note
BD6520F,BD6522F
●Electrical characteristics
◎BD6520F(Unless otherwise specified, Ta = 25℃, VDD = 5V)
Limits
Parameter
On Resistance
Symbol
Unit
Condition
Min.
Typ.
50
60
110
-
Max.
70
85
220
2
RON
1
2
-
mΩ
mΩ
µA
µA
V
VDD = 5V, VCTRL = 5V
VDD = 3V, VCTRL = 3V
VCTRL = 5V, OUT = OPEN
VCTRL = 0V, OUT = OPEN
VCTRL L = Low Level
RON
-
IDD
-
-
Operating Current
IDDST
VCTRL
VCTRL
L
-
-
0.7
-
Control Input voltage
Control Input current
Turn On Delay
H
2.5
-
V
VCTRL H = High Level
ICTRL
-1
0
1000
2000
3
1
µA
us
us
us
us
Ω
VCTRL = L, H
RL = 10Ω,SSCTL = OPEN
CTRL = L→H → OUT=50%
Trd
Tr
200
2000
7500
20
RL = 10Ω,SSCTL = OPEN
CTRL = 10% → 90%
Turn On Rise Time
500
RL = 10Ω,SSCTL = OPEN
CTRL = H→L → OUT=50%
Turn Off Delay
Tfd
-
-
-
RL = 10Ω,SSCTL = OPEN
CTRL = 90% → 10%
Turn Off Fall Time
Tf
1
20
Discharge Resistance
UVLO Threshold Voltage
UVLO Hysteresis Voltage
Thermal Shutdown Threshold
SSCTL Output Voltage
RSWDC
350
600
VDD = 5V, VCTRL = 0V, VOUT = 5V
VUVLO
H
2.3
2.1
2.5
2.3
2.7
2.5
V
V
VDD increasing
VDD decreasing
VUVLO
L
VHYS
TTS
100
200
135
13.5
300
mV
℃
V
VHYS = VUVLOH - VUVLO
VCTRL = 5V
L
-
-
-
-
VSSCTL
VCTRL = 5V
◎BD6522F(Unless otherwise specified, Ta = 25℃, VDD = 5V)
Limits
Parameter
On Resistance
Symbol
Unit
Condition
Min.
Typ.
50
60
110
-
Max.
70
85
220
2
RON1
-
mΩ
mΩ
µA
µA
V
VDD = 5V, VCTRL = 5V
RON2
-
VDD = 3.3V, VCTRL = 3.3V
VCTRL = 5V, OUT = OPEN
VCTRL = 0V, OUT = OPEN
VCTRLL = Low Level
IDD
-
-
Operating Current
IDDST
VCTRLL
-
-
0.7
-
Control Input Voltage
Control Input Current
Turn On Time
VCTRL
H
2.5
-
V
VCTRLH = High Level
ICTRL
TON
TOFF
-1
-
0
1000
4
1
µA
us
us
Ω
VCTRL = L, H
RL = 10Ω,SSCTL = OPEN
CTRL = H → OUT =90%
3500
20
RL = 10Ω,SSCTL = OPEN
CTRL = L → OUT = 10%
Turn Off Time
-
Discharge Resistance
UVLO Threshold Voltage
UVLO Hysteresis Voltage
Thermal Shutdown Threshold
SSCTL Output Voltage
RSWDC
-
350
600
VDD = 5V,VCTRL = 0V
VUVLO
H
2.3
2.1
2.5
2.3
2.7
2.5
V
V
VDD increasing
VDD decreasing
VUVLO
L
VHYS
TTS
100
200
135
13.5
300
mV
℃
V
VHYS = VUVLOH - VUVLO
VCTRL = 5V
L
-
-
-
-
VSSCTL
VCTRL = 5V
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
2/16
Technical Note
BD6520F,BD6522F
●Measurement circuit
◎BD6520F
◎BD6522F
VDD
VDD
BD6520F
BD6522F
VDDA
VDDA
VDDB
OUTA
OUTB
OUTA
OUTB
DISC
VSS
VDDB
SSCTL
CTRL
SSCTL OUTC
CTRL VSS
RL
CL
RL
CL
IOUT
IOUT
CSS
CSS
VCTRL
VCTRL
Fig.1 Measurement circuit
●Timing diagram
◎BD6520F
◎BD6522F
Tf
Tr
90%
50%
90%
90%
VOUT
VOUT
50%
10%
10%
10%
Trd
Tfd
TOFF
TON
TON
TOFF
VCTRL
VCTRL
VCTRLH
VCTRLL
VCTRLH
VCTRLL
Fig.2 Timing diagram
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
3/16
Technical Note
BD6520F,BD6522F
●Typical characteristics
◎BD6520F
80
70
60
50
40
30
20
10
0
120
100
80
60
40
20
0
80
Ta = 25℃
Ta = 25℃
70
60
50
40
30
20
10
0
VDD=3.0V
VDD=3.3V
VDD=5.0V, 5.5V
2
3
4
5
6
2
3
4
5
6
-40 -20
0
20
40
60
80 100
SUPPLY VOLTAGE : VDD [V]
SUPPLY VOLTAGE : VDD [V]
AMBITENT TEMPERATURE : Ta [℃]
Fig.3 On resistance
Fig.4 On resistance
Fig.5 Operating current
(CTRL enable)
1.0
0.8
0.6
0.4
0.2
0.0
0.10
120
100
80
60
40
20
0
VDD = 5.0V
Ta = 25℃
VDD = 5.0V
0.08
0.06
0.04
0.02
0.00
2
3
4
5
6
0
20
40
60
80
100
-40 -20
0
20
40
60
80 100
SUPPLY VOLTAGE : VDD [V]
AMBIENT TEMPERATURE : Ta [
]
℃
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.6 Operating current
(CTRL enable)
Fig.7 Operating current
(CTRL disenable)
Fig.8 Leak current
2.5
2.0
1.5
1.0
0.5
0.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5
2.0
1.5
1.0
0.5
0.0
Ta = 25℃
VDD = 5.0V
VDD = 5.0V
Low to High
High to Low
-40 -20
0
20
40
60
80 100
-40 -20
0
20
40
60
80 100
2
3
4
5
6
AMBIENT TEMPERATURE : Ta [
]
AMBIENT TEMPERATURE : Ta [
]
℃
℃
SUPPLY VOLTAGE : VDD [V]
Fig.9 CTRL input voltage
Fig.10 CTRL input voltage H→L
Fig.11 CTRL input voltage L→H
0.4
0.3
0.2
0.1
0
0.4
5
4
3
2
1
0
Ta = 25℃
VDD = 5.0V
Ta = 25℃
0.3
0.2
0.1
0
Ton
Tr
Trd
2
3
4
5
6
2
3
4
5
6
-40 -20
0
20
40
60
80 100
SUPPLY VOLTAGE : VDD [V]
SUPPLY VOLTAGE : VDD[V]
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.13 CTRL hysteresis voltage
Fig.14 Turn On Rise time
Fig.12 CTRL hysteresis voltage
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
4/16
Technical Note
BD6520F,BD6522F
5
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
VDD = 5.0V
Ta = 25℃
VDD = 5.0V
4
Toff
Toff
Tfd
3
Ton
Tfd
Tf
2
Tr
Tf
Trd
1
0
2
3
4
5
6
-40 -20
0
20
40
60
80 100
-40 -20
0
20
40
60
80 100
SUPPLY VOLTAGE : VDD [V]
AMBIENT TEMPERATURE : Ta [
]
℃
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.16 Turn Off Fall time
Fig.17 Turn Off Fall time
Fig.15 Turn On Rise time
500
400
300
200
100
0
500
400
300
200
100
0
3.0
Ta = 25℃
VDD = 5.0V
VDD = 5.0V
2.8
2.6
2.4
2.2
2.0
VDD increasing
VDD decreasing
-40 -20
0
20
40
60
80 100
2
3
4
5
6
-40 -20
0
20
40
60
80 100
AMBIENT TEMPERATURE : Ta [
]
℃
SUPPLY VOLTAGE : VDD [V]
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.18 Switch discharge resistance
Fig.19 Switch discharge resistance
Fig.20 UVLO threshold voltage
100
100
0.3
VDD = 5.0V
VDD = 5.0V, Ta = 25℃, RL = 10Ω
VDD = 5.0V, Ta = 25℃, RL = 10Ω
0.2
0.1
0
10
10
1
1
1
10
100
1000
10000
1
10
100
1000
10000
-40 -20
0
20
40
60
80 100
Css [pF]
Css [pF]
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.21 UVLO hysteresis voltage
Fig.22 Turn On Rise time (vs. Css)
Fig.23 Turn Off Fall time (vs. Css)
16
16
Ta = 25℃
VDD = 5.0V
14
14
12
10
8
12
10
8
6
6
4
4
2
2
0
0
2
3
4
5
6
-40 -20
0
20
40
60
80 100
SUPPLY VOLTAGE : VDD [V]
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.24 SSCTL output voltage
Fig.25 SSCTL output voltage
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
5/16
Technical Note
BD6520F,BD6522F
◎BD6522F
120
100
80
60
40
20
0
80
70
60
50
40
30
20
10
0
80
Ta = 25℃
Ta = 25℃
70
60
50
40
30
20
10
0
VDD=3.3V
VDD=5.0V
2
3
4
5
6
-40 -20
0
20
40
60
80 100
2
3
4
5
6
SUPPLY VOLTAGE : VDD [V]
AMBIENT TEMPERATURE : Ta [
]
℃
SUPPLY CURRENT : VDD [V]
Fig.26 ON resistance
Fig.27 ON resistance
Fig.28 Operating current
(CTRL enable)
120
100
80
60
40
20
0
1.0
0.8
0.6
0.4
0.2
0.0
0.10
VDD = 5.0V
Ta = 25℃
VDD = 5.0V
0.08
0.06
0.04
0.02
0.00
0
20
40
60
80
100
-40 -20
0
20
40
60
80 100
2
3
4
5
6
AMBIENT TEMPERATURE : Ta [
]
℃
AMBIENT TEMPERATURE : Ta [
]
℃
SUPPLY VOLTAGE : VDD [V]
Fig.29 Operating current
(CTRL enable)
Fig.31 Leak current
Fig.30 Operating current
(CTRL disenable)
2.5
2.0
1.5
1.0
0.5
0.0
2.5
2.0
1.5
1.0
0.5
0.0
0.4
0.3
0.2
0.1
0
Ta = 25℃
VDD = 5.0V
Ta = 25℃
High to Low
Low to High
Low to High
High to Low
2
3
4
5
6
-40 -20
0
20
40
60
80 100
2
3
4
5
6
SUPPLY VOLTAGE : VDD [V]
AMBIENT TEMPERATURE : Ta [
]
℃
SUPPLY VOLTAGE : VDD [V]
Fig.33 CTRL input voltage
Fig.32 CTRL input voltage
Fig.34 CTRL hysteresis voltage
5
4
3
2
1
0
0.4
0.3
0.2
0.1
0.0
5
VDD = 5.0V
Ta = 25℃
VDD = 5.0V
4
3
2
1
0
2
3
4
5
6
-40 -20
0
20
40
60
80 100
-40 -20
0
20
40
60
80 100
DD
AMBIENT TEMPERATURE : Ta [
]
SUPPLY VOLTAGE :V [V]
AMBIENT TEMPERATURE : Ta [ ]
℃
℃
Fig.35 CTRL hysteresis voltage
Fig.36 Turn On time
Fig.37 Turn On time
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
6/16
Technical Note
BD6520F,BD6522F
7
7
6
5
4
3
2
1
0
500
400
300
200
100
0
Ta = 25℃
VDD = 5.0V
Ta = 25℃
6
5
4
3
2
1
0
-40 -20
0
20
40
60
80 100
2
3
4
5
6
2
3
4
5
6
AMBIENT TEMPERATURE : Ta [
]
℃
SUPPLY VOLTAGE : VDD [V]
SUPPLY VOLTAGE : VDD [V]
Fig.38 Turn Off time
Fig.39 Turn Off time
Fig.40 Switch discharge resistance
0.3
3.0
500
400
300
200
100
0
VDD = 5.0V
Ta = 25℃
VDD = 5.0V
2.8
2.6
2.4
2.2
2.0
0.2
0.1
0
VDD increasing
VDD decreasing
-40 -20
AMBIENT TEMPERATURE : Ta [ ]
℃
0
20
40
60
80 100
-40 -20
0
20
40
60
80 100
-40 -20
0
20
40
60
80 100
AMBIENT TEMPERATURE : Ta [
]
℃
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.43 UVLO hysteresis voltage
Fig.41 Switch discharge resistance
Fig.42 UVLO threshold voltage
100
16
100
10
1
VDD = 5.0V, Ta = 25℃, RL = 10Ω
VDD = 5.0V, Ta = 25℃, RL = 10Ω
Ta = 25℃
14
12
10
8
10
6
4
2
1
0
1
10
100
1000
10000
2
3
4
5
6
1
10
100
1000
10000
Css [pF]
SUPPLY VOLTAGE : VDD [V]
Css [pF]
Fig.44 Turn On time (vs. Css)
Fig.45 Turn Off time (vs. Css)
Fig.46 SSCTL output voltage
16
14
12
10
8
VDD = 5.0V
6
4
2
0
-40 -20
0
20
40
60
80 100
AMBIENT TEMPERATURE : Ta [
]
℃
Fig.47 SSCTL output voltage
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
7/16
Technical Note
BD6520F,BD6522F
●Waveform data
VDD = 5V, CL = 47µF, RL = 47Ω, unless otherwise specified.
VCTRL
VCTRL
VCTRL
(5V/div.)
(5V/div.)
(5V/div.)
VOUT
VOUT
VOUT
(5V/div.)
(5V/div.)
(5V/div.)
IOUT
(0.5A/div.)
IOUT
(0.5A/div.)
IOUT
(0.5A/div.)
TIME (1ms/div.)
TIME (5ms/div.)
TIME (1ms/div.)
Fig.48 Turn On Rise Time
(BD6520F)
Fig.49 Turn Off Fall Time
(BD6520F)
Fig.50 Turn On Rise Time
(BD6522F)
VCTRL
VCTRL
VCTRL
(5V/div.)
(5V/div.)
(5V/div.)
CL=330uF
CL=330uF
Open
Open
VOUT
470pF
(5V/div.)
1000pF
4700pF
2200pF
IOUT
IOUT
IOUT
(0.5A/div.)
(0.2A/div.)
(0.5A/div.)
TIME (5ms/div.)
TIME (2ms/div.)
TIME (2ms/div.)
Fig.51 Turn Off Fall Time
(BD6522F)
Fig.52 Inrush current vs. Css
(BD6520F)
Fig.53 Inrush current vs. Css
(BD6522F)
VCTRL
VCTRL
(5V/div.)
(5V/div.)
DISC terminal in use
VOUT
VOUT
(2V/div.)
(2V/div.)
Temperature decline
Latch release
Return
Thermal shut down
TIME (500ms/div.)
TIME (20ms/div.)
Fig.54 Discharge: CL = 47uF, RL = Open
(BD6522F)
Fig.55 Thermal shutdown
VDD
(2V/div.)
VDD
VOUT
(2V/div.)
(2V/div.)
VOUT
(2V/div.)
TIME (500ms/div)
TIME (500ms/div)
Fig.56 UVLO (at VDD increase)
Fig.57 UVLO (at VDD decrease)
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
8/16
Technical Note
BD6520F,BD6522F
●Block diagram, pin configuration, pin description
(BD6520F)
OUTA
VDDA
1
8
OUTB
7
VDDB
2
Oscillator
Charge
Pump
OUTC
6
SSCTL
3
＋
UVLO
－
Band
Gap
Thermal
Shutdown
S
R
Q
1
2
8
7
6
OUTA
VDDA
FF
VDDB
OUTB
OUTC
3
SSCTL
CTRL
4
5
VSS
CTRL
4
VSS
5
Fig.58 Block diagram(BD6520F)
Switch input pin
Pin No.
1,2
Symbol
Pin Function
VDDA, VDDB
SSCTL
At use, connect each pin outside.
Soft start setting pin
Add external capacitor, it is possible to delay switch On, Off time.
3
4
Control input pin
Switch On at High level, switch Off at Low level.
CTRL
5
VSS
Ground
Switch output pin
At use, connect each pin outside.
6,7,8
OUTA, OUTB, OUTC
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
9/16
Technical Note
BD6520F,BD6522F
(BD6522F)
VDDA
1
OUTA
8
VDDB
2
OUTB
7
Oscillator
Charge
Pump
SSCTL
3
＋
UVLO
－
DISC
6
Band
Gap
Thermal
Shutdown
S
Q
FF
R
1
2
8
7
6
OUTA
VDDA
VDDB
OUTB
DISC
CTRL
3
SSCTL
CTRL
4
4
5
VSS
VSS
5
Fig.59 Block diagram(BD6522F)
Switch input pin
Pin No.
1,2
Symbol
Pin Function
VDDA, VDDB
SSCTL
At use, connect each pin outside.
Soft start setting pin
Add external capacitor, it is possible to delay switch On, Off time.
3
4
Control input pin
Switch On at High level, switch Off at Low level.
CTRL
5
VSS
Ground
6
DISC
Discharge pin
Switch output pin
At use, connect each pin outside.
7,8
OUTA, OUTB
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
10/16
Technical Note
BD6520F,BD6522F
●I/O circuit
Equivalent circuit
BD6520F
Equivalent circuit
BD6522F
Symbol
Pin No.
SSCTL
SSCTL
SSCTL
CTRL
DISC
OUT
3
CTRL
CTRL
4
DISC
6
(BD6522F)
OUT
OUT
6 (BD6520F),
7, 8
Fig.60 I/O circuit
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
11/16
Technical Note
BD6520F,BD6522F
●Functional description
1. Switch operation
VDD pin and OUT pin are connected to the drain and the source of switch MOSFET respectively. And the VDD is used
also as power source input to internal control circuit.
When CTRL input is set to High level and the switch is turned on, VDD and OUT is connected by a 50mΩ switch. In a
normal condition, current flows from VDD to OUT. If voltage of OUT is higher than VDD, current flows from OUT to VDD,
since the switch is bidirectional.
In BD6520F, there is a parasitic diode between the drain and the source of switch MOSFET. Therefore, even when the
switch is off, if the voltage of OUT is higher than that of VDD, current flows from OUT to VDD. In BD6522F, there is not this
parasitic diode, it is possible to prevent current from flowing reversely from OUT to VDD.
2. Thermal shutdown
Thermal shut down circuit turns off the switch when the junction temperature exceeds 135℃(Typ.).
The switch off status of the thermal shut down is latched. Therefore, even when the junction temperature goes down,
switch off is maintained. To release the latch, it is necessary to input a signal to switch off to CTRL terminal or make UVLO
status. When the switch on signal is input or UVLO is released, the switch output is recovered.
The thermal shut down circuit works when CTRL signal is active.
3. Low voltage malfunction prevention circuit (UVLO)
The UVLO circuit monitors the voltage of the VDD pin, when the CTRL input is active. UVLO circuit prevents the switch
from turning on until the VDD exceeds 2.5V(Typ.). If the VDD drops below 2.3V(Typ.) while the switch turns on, then UVLO
shuts off the switch.
4. Soft start control
In BD6520F/BD6522F, soft start is carried out in order to reduce inrush current at switch on. Further, in order to reduce
inrush current, soft start control pin (SSCTL) is prepared.
By connecting external capacitor to between SSCTL and GND, it is possible to make smoother the switch rise time. When
the switch is enabled, SSCTL outputs voltage of about 13.5V.
SSCTL terminal requires high impedance, so pay attention in packaging it so that there should not be leak current. And
when voltage is impressed from the outside to SSCTL terminal, switch on, off cannot be made correctly.
5. Discharge circuit
When the switch between the VDD and the OUT is OFF, the 200Ω(Typ.) discharge switch between OUT and GND turns on.
By turning on this switch, electric charge at capacitive load is discharged.
In BD6522F, the input of discharge circuit is separately prepared as DISC pin. When to use the discharge circuit, connect
OUT pin and DISC pin outside.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
12/16
Technical Note
BD6520F,BD6522F
●Timing diagram
VDD
VCTRL
VOUT
Discharge circuit
ON
OFF
ON
Fig.61 Normal operation
VDD
VUVLOL
VUVLOH
VCTRL
VOUT
Discharge circuit
ON
OFF
Fig.62 UVLO operation
Over temperature Over temperature
corrected occurs
Over temperature
corrected
Over temperature
occurs
VDD
VCTRL
VOUT
Latch
Release
Release
Set
Set
Release
ON OFF
Fig.63 Thermal shutdown operation
Release
Discharge circuit
OFF
OFF
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
13/16
Technical Note
BD6520F,BD6522F
●Typical application circuits
BD6520F
BD6522F
VDDA OUTA
Power Supply
Power Supply
1µF
OUTA
VDDA
VDDB
1µF
Load
Load
OUTB
OUTC
OUTB
DISC
VSS
VDDB
Css
Css
SSCTL
CTRL
SSCTL
CTRL
On/Off
On/Off
VSS
Fig.64 Power supply switch circuit (BD6520F)
Fig.65 Power supply switch circuit (BD6522F)
BD6522F
BD6522F
Power Supply A
VDDA
VDDB
OUTA
OUTB
VDDA
VDDB
OUTA
OUTB
Power Supply B
On/Off
Load
Css
Css
DISC
VSS
DISC
VSS
SSCTL
CTRL
SSCTL
CTRL
On/Off
Fig.66 2 power supply changeover switch circuit (BD6522F)
●Thermal derating characteristic
(SOP8)
600
500
400
300
200
100
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE: Ta [
]
℃
Fig. 67 Power dissipation curve
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
14/16
Technical Note
BD6520F,BD6522F
●Notes for use
(1) Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can
break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any
special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety
measures including the use of fuses, etc.
(2) Operating conditions
These conditions represent a range within which characteristics can be provided approximately as expected. The
electrical characteristics are guaranteed under the conditions of each parameter.
(3) Reverse connection of power supply connector
The reverse connection of power supply connector can break down ICs. Take protective measures against the breakdown due
to the reverse connection, such as mounting an external diode between the power supply and the IC’s power supply terminal.
(4) Power supply line
Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines. In this regard,
for the digital block power supply and the analog block power supply, even though these power supplies has the same
level of potential, separate the power supply pattern for the digital block from that for the analog block, thus suppressing
the diffraction of digital noises to the analog block power supply resulting from impedance common to the wiring patterns.
For the GND line, give consideration to design the patterns in a similar manner.
Furthermore, for all power supply terminals to ICs, mount a capacitor between the power supply and the GND terminal. At the
same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the capacitor to be used
present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant.
(5) GND voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient.
(6) Short circuit between terminals and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can
break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between
the terminal and the power supply or the GND terminal, the ICs can break down.
(7) Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
(8) Inspection with set PCB
On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress.
Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set
PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the jig.
After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In addition,
for protection against static electricity, establish a ground for the assembly process and pay thorough attention to the
transportation and the storage of the set PCB.
(9) Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic
element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal.
Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower than
the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input terminals when
no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input terminals
a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics.
(10) Ground wiring pattern
If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND
pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that
resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the
small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well.
(11) External capacitor
In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a
degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc.
(12) Thermal shutdown circuit (TSD)
When junction temperatures become 135°C (typ.) or higher, the thermal shutdown circuit operates and turns a switch OFF.
The thermal shutdown circuit, which is aimed at isolating the LSI from thermal runaway as much as possible, is not aimed
at the protection or guarantee of the LSI. Therefore, do not continuously use the LSI with this circuit operating or use the
LSI assuming its operation.
(13) Thermal design
Perform thermal design in which there are adequate margins by taking into account the power dissipation (Pd) in actual states of use.
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2011.05 - Rev.B
15/16
Technical Note
BD6520F,BD6522F
●Ordering part number
B
D
6
5
2
0
F
-
E
2
Part No.
Part No.
6520
6522
Package
F: SOP8
Packaging and forming specification
E2: Embossed tape and reel
(SOP8)
SOP8
<Tape and Reel information>
5.0 0.2
(MAX 5.35 include BURR)
Tape
Embossed carrier tape
2500pcs
+
−
6
°
4°
4
°
Quantity
8
7
6
5
E2
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
(
)
1
2
3
4
0.595
+0.1
0.17
-
0.05
S
0.1
S
1.27
Direction of feed
1pin
0.42 0.1
Reel
Order quantity needs to be multiple of the minimum quantity.
(Unit : mm)
∗
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.05 - Rev.B
16/16
Notice
N o t e s
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
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instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-
controller or other safety device). ROHM shall bear no responsibility in any way for use of any
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such special purpose, please contact a ROHM sales representative before purchasing.
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A
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