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PDF BD9528MUV Data sheet ( Hoja de datos )
| Número de pieza | BD9528MUV | |
| Descripción | Main Power Supply ICs | |
| Fabricantes | ROHM Semiconductor | |
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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 (1.0V～
5.5V) from a wide input voltage range (5.5V～28V). 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 H3REGTM 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=200kHz～500kHz)
6) Built-in Power good circuit
7) Built-in 2ch Linear regulator (5V/100mA,3.3V/100mA)
www.DataSheet.co.kr
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
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/33
2010.03 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
BD9528MUV
●Output condition table
Input
CTL EN1 EN2 REG1(5V)
Low Low Low
OFF
Low Low High
OFF
Low High Low
OFF
Low High High
OFF
High Low Low
ON
High Low High
ON
High
High
Low
ON
High
High
High
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.
Technical Note
Output
REG2(3.3V)
DC/DC1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON OFF
ON OFF
ON ON
ON ON
DC/DC2
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
●Block Diagram, Application circuit
FS2
10
5
PGOOD2
FB2
11
6
SS2
ILIM2
8
EN2
4
3 2 1 31
REG1
32
22 23 24 26
REG1
25
CL2
SCP2
OVP2
Short through
Protection
Circuit
SLLMTM
Block
MCTL
H3RegTM
Controller
Block
FS2
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Short through
Protection
Circuit
MCTL
SLLMTM
Block
CL1
SCP1
OVP1
H3RegTM
FS1 Controller
Block
EN2 EN1
Thermal
Protection
Reference
Block
5V 3.3V
Reg Reg
AGND
13
FS1 RFS1
15
20
PGOOD1
FB1
14
REF
12
SS1
19
ILIM1
17
EN1
21
79
30
29 28 18 16
27
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/33
2010.03 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
BD9528MUV
●Electrical characteristic curves (Reference data) – Continued
3.500
3.000
2.500
2.000
1.500
1.000
0.500
0.000
0
V IN =7.5V ( -5℃ ）
VIN=21V（-5℃）
V IN =7.5V ( 75℃ ）
VIN=21V（75℃）
2 4 6 8 10 12 14 16
IOUT [A]
Fig.49 Ta-IOCP
(Vo=3.3V)
IOUT - REG1 voltage
5.1
5
4.9
4.8
4.7
4.6
4.5
0
50 100 150 200
IOUT [mA]
Fig.50 IREG1-REG1
250
Technical Note
3.4
3.3
3.2
3.1
3
2.9
2.8
0
IOUT - REG2 voltage
50 100 150 200 250
IOUT [mA]
Fig.51 IREG2-REG2
www.DataSheet.co.kr
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/33
2010.03 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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