ROHM BD6538G Technical data
Power Management Switch ICs for PCs and Digital Consumer Products
1ch Small Package
High Side Switch IC
for USB Devices and Memory Cards
BD6538G
●Description
BD6538G is single channel high side powers switch with low ON resistance Nch power MOSFET.
Rich safety functions such as Over current detection, Thermal shutdown (TSD), Under Voltage Lock Out(UVLO) and
Soft start function which are required for the power supply port protection are integrated into 1chip.
●Feature
1) Single channel of low ON resistance (Typ = 150mΩ) Nch power MOSFET built in
2) 500mA Continuous current load
3) Active”High”Control Logic
4) Soft start function
5) Over current detection（Output Off-latch Operating）
6) Thermal shutdown
7) Open drain error flag output
8) Under voltage lockout
9) Power supply voltage range 2.7V~5.5V
10) Operating temperature range-40°C~85°C
11) SSOP5 Package
●Absolute maximum ratings
Parameter Symbol Ratings Unit
Supply voltage VIN -0.3 to 6.0 V
No.11029EBT14
Enable voltage VEN -0.3 to 6.0 V
/OC voltage V
/OC current I
OUT voltage V
Storage temperature T
Power dissipation PD 675 *1 mW
*1 1 Mounted on 70mm * 70mm * 1.6mm grass-epoxy PCB. Derating : 5.4mW / °C for operating above Ta=25°C.
* This product is not designed for protection against radioactive rays.
●Operating conditions
Parameter Symbol
Operating voltage VIN 2.7 - 5.5 V
Operating temperature T
Continuous output current I
-0.3 to 6.0 V
/OC
5 mA
/OC
-0.3 to VIN + 0.3 V
OUT
-55 to 150 °C
STG
Ratings
Min Typ Max
-40 - 85 °C
OPR
0 - 0.5 A
OUT
Unit
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/11
2011.05 - Rev.B
BD6538G
●Electric characteristics
Unless otherwise specified VIN = 5.0V, Ta = 25°C
DC characteristics
Parameter Symbol
Limits
Min. Typ. Max.
Technical Note
unit Condition
Operating Current IDD - 110 160 μA VEN = 5.0V, V
Standby Current I
EN input voltage
- 0.01 5 μA VEN = 0V, V
STB
V
2.0 - - V High input
EN
VEN - - 0.8 V Low input
EN input current IEN -1.0 0.01 1.0 μA VEN =0Vor5V
ON resistance RON - 150 200 mΩ I
= 50mA
OUT
Over current threshold ITH 0.5 - 1.0 A -
Output current at short ISC 0.35 - - A V
/OC output lOW voltage V
UVLO Threshold
- - 0.4 V I
/OC
V
2.1 2.3 2.5 V Increasing VIN
TUVH
V
2.0 2.2 2.4 V Decreasing VIN
TUVL
= 0V (RMS)
OUT
= 0.5mA
/OC
AC characteristics
Parameter Symbol
Output rise time T
Min. Typ. Max.
- 1 6 ms RL = 20Ω, Fig. 2 Ref.
ON1
Limits
unit Condition
OUT
= Open
OUT
= Open
Output rise delay time T
Output fall time T
Output fall delay time T
Blanking time T
- 1.5 10 ms RL = 20Ω, Fig. 2 Ref.
ON2
- 1 20 μs RL = 20Ω, Fig. 2 Ref.
OFF1
- 3 40 μs RL = 20Ω, Fig. 2 Ref.
OFF2
10 15 20 ms -
BLANK
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2/11
2011.05 - Rev.B
BD6538G
/
/
●Measurement circuit
Technical Note
1µF
EN
V
A
1µF
EN
V
ON resistance, Over current /OC output LOW voltage
●Timing diagram
A
VIN
VIN
VIN
GND
EN
VIN
GND
EN
VOUT
OC
VOUT
OC
V
EN
V
OUT
IN
V
A
VIN
1µF RL
GND
EN
V
EN
EN input voltage, Output rise, fall time Operating current
IN
V
I
OUT
10k
A
VIN
1µF
GND
EN
V
EN
Fig.1 Measurement circuit
50% 50%
T
ON2
90%
10%
T
ON1
Fig.2 Timing chart at output rise / fall time
90%
T
OFF2
10%
T
OFF1
VOUT
/OC
VOUT
/OC
OC
I
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
3/11
2011.05 - Rev.B
BD6538G
w
●Reference data
Technical Note
140
Ta= 2 5° C
120
100
80
[μA]
DD
I
60
40
OPERATING CURRENT :
20
0
23456
SUPPLY VOLTAGE : V
Fig.3 Operating current
EN Enable
1.0
VIN=5.0V
0.8
0.6
STB[μA]
I
0.4
0.2
OPERATING CURRENT :
0.0
-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]
Fig.6 Operating current
EN Disable
200
Ta= 2 5° C
150
mΩ]
100
ON[
R
ON RESISTANCE :
50
0
23456
SUPPLY VOLTAGE : V
Fig.9 ON resistance
1.0
VIN=5.0V
0.9
0.8
0.7
0.6
Overcurrent threshold : ITH[A]
0.5
-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]
Fig.12 Over current detection
140
VIN=5.0V
120
100
80
[μA]
DD
60
I
40
OPERATING CURRENT :
20
0
-50 0 50 100
[V]
IN
AMBI ENT TEM PERATU RE : Ta[℃]
Fig.4 Operating current
EN Enable
2.0
Ta= 2 5° C
1.5
Low to High
High to Low
1.0
EN[V] 0
V
0.5
ENABLE INPUT VOLTAGE :
0.0
23456
SUPPLY VOLTAGE : V
IN[V]
Fig.7 EN input voltage
200
VIN=5.0V
150
[mΩ]
100
ON
R
ON RESISTANCE :
50
0
-50 0 50 100
IN
[V]
AMBIENT TEMPERATURE : Ta[℃]
Fig.10 ON resistance
100
Ta= 2 5° C
80
60
40
V/OC[mV]
20
/OC OUTPUT LOW V OLTAGE :
0
23456
SUPPLY VOLTAGE : V
[V]
IN
Fig.13 /OC output LOW voltage
1.0
Ta= 2 5° C
0.8
0.6
[µA]
STB
I
0.4
OPERATING CURRENT :
0.2
0.0
23456
SUPPLY VOLTAGE : VIN[V]
Fig.5 Operating current
EN Disable
2.0
VIN=5.0V
1.5
EN[V]
1.0
V
0.5
ENABLE INPUT VOLTAGE :
0.0
-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]
Low to High
High to Lo
Fig.8 EN input voltage
1.0
Ta= 2 5° C
0.9
[A]
TH
0.8
0.7
0.6
Overcurrent threshold : I
0.5
23456
SUPPLY VOLTAGE : V
Fig.11 Over current detection
100
VIN=5.0V
80
60
[mV]
/O C
V
40
20
/OC OUTPUT LOW VOLTAGE :
0
-50 0 50 100
AMBIENT TEMPERATURE : Ta[℃]
Fig.14 /OC output LOW voltage
[V]
IN
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
4/11
2011.05 - Rev.B
Loading...