Hi-performance Regulator IC Series for PCs
Main Power Supply ICs
for Note PC (Linear Regulator Integrated)
BD9528MUV
No.10030EAT26
●Description
BD9528MUV is a 2ch switching regulator controller with high output current which can achieve low output voltage (1.0V½
5.5V) from a wide input voltage range (5.5V½28V). High efficiency for the switching regulator can be realized by utilizing an
external N-MOSFET power transistor. A new technology called H3RegTM(High speed, High efficiency, High performance)
is a Rohm proprietary control method to realize ultra high transient response against load change. SLLM (Simple Light Load
Mode) technology is also integrated to improve efficiency in light load mode, providing high efficiency over a wide load
range. For protection and ease of use, 2ch LDO (5V/100mA, 3.3V/100mA), the soft start function, variable frequency
function, short circuit protection function with timer latch, over voltage protection, and Power good function are all built in.
This switching regulator is specially designed for Main Power Supply of laptop PC.
●Features
1) 2ch H
3
REG
TM
DC/DC Converter controller
2) Adjustable Simple Light Load Mode (SLLM), Quiet Light Load Mode (QLLM) and Forced continuous Mode
3) Thermal Shut Down (TSD), Under Voltage LockOut (UVLO), Over Current Protection (OCP),
Over Voltage Protection (OVP), Short circuit protection with 0.75ms timer-latch (SCP)
4) Soft start function to minimize rush current during startup
5) Switching Frequency Variable (f=200kHz½500kHz)
6) Built-in Power good circuit
7) Built-in 2ch Linear regulator (5V/100mA,3.3V/100mA)
8) Built in reference voltage(0.7V)
9) VQFN032V5050 package
10) Built-in BOOT-Di
11) Built-in output discharge
●Applications
Laptop PC, Desktop PC, LCD-TV, Digital Components
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© 2010 ROHM Co., Ltd. All rights reserved.
1/33
2010.03 - Rev.A
BD9528MUV
●Absolute
maximum ratings
(Ta=25℃)
Parameter
Symbol
VIN, CTL,SW1,SW2
EN1, EN2, PGOOD1, PGOOD2
Vo1, Vo2, MCTL1, MCTL2
FS1, FS2, FB1, FB2, ILIM1, ILIM2,
SS1, SS2, LG1, LG2, REF,REG2
BOOT1, BOOT2
BOOT1-SW1, BOOT2-SW2,
HG1-SW1, HG2-SW2
HG1
HG2
PGND1, PGND2
Pd1
Pd2
Pd3
Pd4
Topr
Tstg
Tjmax
Limits
30
*
1
*
2
6
*
1
*
2
REG1+0.3 *
1
35
*
1
*
2
7
*
1
*
2
BOOT1+0.3
*
1
*
2
BOOT2+0.3
*
1
*
2
AGND±0.3
*
1
*
2
0.38 *
3
0.88 *
4
3.26 *
5
6
4.56 *
-20½+100
-55½+150
+150
Technical Note
Unit
V
V
V
V
V
V
V
V
W
W
W
W
℃
℃
℃
Terminal Voltage
Power Dissipation1
Power Dissipation2
Power Dissipation3
Power Dissipation4
Operating temperature Range
Storage temperature Range
Junction Temperature
*1 Do not however exceed Pd.
*2 Instantaneous surge voltage, back electromotive force and voltage under less than 10% duty cycle.
*3 Reduced by 3.0mW for each increase in Ta of 1℃ over 25℃ (when don’t mounted on a heat radiation board )
*4 Reduced by 7.0mW for increase in Ta of 1℃ over 25℃. (when mounted on a board 74.2mm×74.2mm×1.6mm Glass-epoxy PCB which has 1 layer.
(Copper foil area : 20.2mm
2
)
*5 Reduced by 26.1mW for increase in Ta of 1℃ over 25℃. (when mounted on a board 74.2mm×74.2mm×1.6mm Glass-epoxy PCB which has 4 layers.
(1
st
and 4
th
copper foil area : 20.2mm
2
, 2
nd
and 3
rd
copper foil area : 5505mm
2
)
*6 Reduced by 36.5mW for increase in Ta of 1℃ over 25℃. (when mounted on a board 74.2mm×74.2mm×1.6mm Glass-epoxy PCB which has 4 layers.
(All copper foil area : 5505mm
2
)
●Operating
conditions(Ta=25℃)
Parameter
Symbol
VIN
CTL
EN1, EN2, MCTL1, MCTL2
BOOT1, BOOT2
SW1, SW2
BOOT1-SW1, BOOT2-SW2, HG1-SW1, HG2-SW2
Vo1, Vo2, PGOOD1, PGOOD2
TONmin
MIN.
5.5
-0.3
-0.3
4.5
-0.3
-0.3
-0.3
-
MAX.
28
28
5.5
33
28
5.5
5.5
150
Unit
V
V
V
V
V
V
V
nsec
Terminal Voltage
MIN ON TIME
★
This product should not be used in a radioactive environment.
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© 2010 ROHM Co., Ltd. All rights reserved.
2/33
2010.03 - Rev.A
BD9528MUV
●Electrical
characteristics
(unless otherwise noted, Ta=25℃ VIN=12V, CTL=OPEN, EN1=EN2=5V, FS1=FS2=51kΩ)
Standard Value
Parameter
VIN standby current
VIN bias current
VIN shut down mode current
CTL Low Voltage
CTL High Voltage
CTL bias current
EN Low Voltage
EN High Voltage
EN bias current
[5V linear regulator](VIN)
REG1 output voltage
Maximum current
Line Regulation
Load Regulation
[3.3V linear regulator]
REG2 output voltage
Maximum current
Line Regulation
Load Regulation
[5V linear regulator](Vo1)
Input threshold voltage
Input delay time
Switch resistance
[Under Voltage lock out block]
REG1 threshold voltage
Hysteresis voltage
[Output voltage sense block]
Feedback voltage1
FB1 bias current
Output discharge resistance1
Feedback voltage2
FB2 bias current
Output discharge resistance2
VFB1
IFB1
RDISOUT1
VFB2
IFB2
RDISOUT2
0.693
-
50
0.693
-
50
0.700
0
100
0.700
0
100
0.707
1
200
0.707
1
200
V
μA
Ω
V
μA
Ω
REG1_UVLO
dV_UVLO
3.9
50
4.2
100
4.5
200
V
mV
REG1th
TREG1
RREG1
4.1
1.5
-
4.4
3.0
1.0
4.7
6.0
3.0
V
ms
Ω
VREG2
IREG2
Reg.l2
Reg.L2
3.27
100
-
-
3.30
-
-
-
3.33
-
20
30
V
mA
mV
mV
VREG1
IREG1
Reg.l1
Reg.L1
4.90
100
-
-
5.00
-
90
30
5.10
-
180
50
V
mA
mV
mV
Symbol
MIN.
ISTB
IIN
ISHD
VCTLL
VCTLH
ICTL
VENL
VENH
IEN
70
60
6
-0.3
2.3
-18
-0.3
2.3
-
TYP.
150
130
12
-
-
-12
-
-
3
MAX.
250
230
18
0.8
28
-6
0.8
5.5
6
μA
μA
μA
V
V
μA
V
V
μA
Unit
Technical Note
Condition
CTL=5V, EN1=EN2=0V
Vo1=5V
CTL=0V
CTL=0V
EN=3V
IREG1=1mA
IREG2=0mA
VIN=5.5 to 25V
IREG1=0 to 30mA
IREG2=1mA
IREG1=0mA
VIN=5.5 to 25V
IREG2=0 to 30mA
Vo1: Sweep up
REG1: Sweep up
REG1, Sweep down
FB1=REF
FB2=REF
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© 2010 ROHM Co., Ltd. All rights reserved.
3/33
2010.03 - Rev.A
BD9528MUV
●Electrical
characteristics – Continued
(unless otherwise noted, Ta=25℃ VIN=12V, CTL=OPEN, EN1=EN2=5V, FS1=FS2=51kΩ)
Standard Value
Parameter
[H
3
REG block]
Ontime1
Ontime2
Maximum On time 1
Maximum On time 2
Minimum Off time
[FET driver block]
HG higher side ON resistor
HG lower side ON resistor
LG higher side ON resistor
LG lower side ON resistor
[Over voltage protection block]
OVP threshold voltage
OVP Hysteresis
[Short circuit protection block]
SCP threshold voltage
Delay time
[Current limit protection block]
Offset voltage
[Power good block]
Power good low threshold
Power good low voltage
Delay time
Power good leakage current
[Soft start block]
Charge current
Standby voltage
[Mode control block]
MCTL Low voltage
MCTL High voltage
MCTL bias current
VMCTL_L
VMCTL_H
IMCTL
-0.3
2.3
8
-
-
16
0.3
REG1
+0.3
24
V
V
μA
ISS
VSS_STB
1.5
-
2.3
-
3.1
50
μA
mV
VPGTHL
VPGL
TPGOOD
ILEAKPG
0.525
(-25%)
-
0.4
-2
0.595
(-15%)
0.1
0.75
0
0.665
(-5%)
0.2
1.5
2
V
V
ms
μA
dVSMAX
80
100
120
mV
VSCP
TSCP
0.42
(-40%)
0.4
0.49
(-30%)
0.75
0.56
(-20%)
1.5
V
ms
VOVP
dV_OVP
0.77
(+10%)
50
0.84
(+20%)
150
0.91
(+30%)
300
V
mV
HGHON
HGLON
LGHON
LGLON
-
-
-
-
3.0
2.0
2.0
0.5
6.0
4.0
4.0
1.0
Ω
Ω
Ω
Ω
TON1
TON2
TONMAX1
TONMAX2
TOFFMIN
0.760
0.470
2.5
1.65
-
0.910
0.620
5
3.3
0.2
1.060
0.770
10
6.6
0.4
μs
μs
μs
μs
μs
Symbol
MIN.
TYP.
MAX.
Unit
Technical Note
Condition
Vo1=5V
Vo2=3.3V
Vo1=5V
Vo2=33V
ILIM=100kΩ
IPGOOD=1mA
VPGOOD=5V
MCTL=5V
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© 2010 ROHM Co., Ltd. All rights reserved.
4/33
2010.03 - Rev.A
BD9528MUV
●Output
condition table
Input
EN1
Low
Low
High
High
Low
Low
High
High
Output
REG2(3.3V)
DC/DC1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
ON
ON
ON
Technical Note
CTL
Low
Low
Low
Low
High
High
High
High
EN2
Low
High
Low
High
Low
High
Low
High
REG1(5V)
OFF
OFF
OFF
OFF
ON
ON
ON
ON
DC/DC2
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
※
CTL pin is connected to VIN pin with 1MΩ resistor(pull up) internal IC.
※
EN pin is connected to AGND pin with 1MΩ resistor(pull down) internal IC.
●Block
Diagram, Application circuit
Vo2
Adjustable
Vo1
Adjustable
BOOT2
VIN
BOOT1
VIN
PGND2
3
2
1
31
REG1
32
REG1
22
23
24
26
PGND1
25
SW2
SW1
HG2
HG1
LG2
REG1
REG1
LG1
AGND
Short through
Protection
Circuit
SLLM
TM
Block
CL1
SCP1
OVP1
CL2
SCP2
OVP2
13
Short through
Protection
Circuit
SLLM
TM
Block
FS2
10
Short Circuit Protect
SCP2
REG1
MCTL
MCTL
FS1
15
SCP1
RFS1
Short Circuit Protect
5
PGOOD2
20
PGOOD1
Power Good
Over Voltage
Protect
OVP2
Timer
Timer
Timer
Power Good
FS2
FS1
EN2
TSD
EN1
FB2
REF
UVLO
Timer
H
3
Reg
TM
Controller
Block
H
3
Reg
TM
Controller
Block
Over Voltage
Protect
OVP1
FB1
REF
Thermal
Protection
11
6
SS2
Over Current
Protect
CL2
14
REF
12
SS1
19
Over Current
Protect
CL1
ILIM2
REF
ILIM1
17
PGND1
SW1
8
SW2
PGND2
MCTL
EN2
4
Vo1
5V
Reg
3.3V
Reg
SLLM Mode Control
Reference
Block
REG1
EN1
21
MCTL1
MCTL2
Vo2
VIN
CTL
REG1
1uF
5.5½28V
REG1
VIN
REG2
REG2
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© 2010 ROHM Co., Ltd. All rights reserved.
3.3V
5V
Vo1
7
9
30
29
28
18
16
27
5/33
2010.03 - Rev.A
REG1
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