Hi-performance Regulator IC Series for PCs
Switching Regulators
for DDR-SDRAM Cores
BD9575FV
No.09030EBT11
●Description
BD9575FV is a switching regulator controller with high output current which can achieve low output voltage (0.7V to 2.0V)
from a wide input voltage range (4.5V to 28V). High efficiency for the switching regulator can be realized by utilizing an
external N-MOSFET power transistor. A new technology called H3Reg
TM
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, the soft start
function, variable frequency function, short circuit protection function with timer latch, over voltage protection function and
REF synchronous function are all built in. This switching regulator is specially designed for the DDR-SDRAM core.
●Features
1) H
3
Reg
TM
Switching Regulator Controller
2) Light Load Mode and Continuous Mode Changeable
3) Thermal Shut Down (TSD), Under Voltage LockOut (UVLO), Over Current Protection (OCP),
Over Voltage Protection (OVP), Short Circuit Protection (SCP) built-in
4) Soft start function to minimize rush current during startup
5) Switching Frequency Variable (f=200KHz½600KHz)
6) SSOP-B20 Package
●Applications
Laptop PC, Desktop PC, LCD-TV, Digital Components
●Maximum
Absolute Ratings (Ta=25℃)
Parameter
Input Voltage 1
Input Voltage 2
Input Voltage 3
BOOT Voltage
BOOT-SW Voltage
HG-SW Voltage
LG Voltage
REF Voltage
Output Voltage
ILIM/SCP/SS/FS/SLLM Voltage
VREG Voltage
EN Input Voltage
Power Dissipation 1
Power Dissipation 2
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Symbol
VCC
VDD
VIN
BOOT
BOOT-SW
HG-SW
LG
REF
VOUT/Is+/Is-
ILIM/SCP/SS/FS/SLLM
VREG
EN
Pd1
Pd2
Topr
Tstg
Tjmax
Limit
7
＊
1
7
＊
1
30
＊
35
＊
1
1
Unit
V
V
V
V
V
V
V
V
V
V
V
V
W
W
℃
℃
℃
7
＊
1
7
＊
1
VDD
VCC
VCC
VCC
VCC
7
＊
1
0.5
＊
2
0.81
＊
3
-20½+100
-55½+150
+150
*1 Not to exceed Pd.
*2 Reduced by 4mW for each increase in Ta of 1℃ over 25℃. IC only.
*3 Reduced by 6.5mW for increase in Ta of 1℃ over 25℃. (when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB, 1 layer)
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© 2009 ROHM Co., Ltd. All rights reserved.
1/20
2009.04 - Rev.B
BD9575FV
●Operating
Conditions (Ta=25℃)
Parameter
Input Voltage 1
Input Voltage 2
Input Voltage 3
BOOT Voltage
SW Voltage
BOOT-SW Voltage
SLLM Input Voltage
EN Input Voltage
Output setting voltage
Is Input Voltage
MIN ON Time
*This product should not be used in a radioactive environment.
Technical Note
Symbol
VCC
VDD
VIN
BOOT
SW
BOOT-SW
SLLM
EN
REF
Is+/Is-
Tonmin
MIN
4.5
4.5
4.5
4.5
-0.7
4.5
0
0
0.7
0.7
-
MAX
5.5
5.5
28
33
28
5.5
5.5
5.5
2.0
2.7
200
Unit
V
V
V
V
V
V
V
V
V
V
nsec
●Electrical
characteristics
(unless otherwise noted, Ta=25℃ VCC=5V, VDD=5V, EN/SLLM=5V, VIN=12V, REF=1.8V, R
FS
=68kΩ)
Standard Value
Parameter
Symbol
Unit
MIN
TYP
MAX
[Whole Device]
VCC Bias Current
VIN Bias Current
VCC Standby Current
VIN Standby Current
EN Low Voltage
EN HighVoltage
EN Bias Current
VREG Voltage
[Under Voltage Locked Out ]
VCC threshold voltage
VCC hysteresis voltage
VIN threshold voltage
VIN hysteresis voltage
VREG threshold voltage
VREG hysteresis voltage
[H
3
Reg
TM
]
Frequency
ON Time
MAX ON Time
MIN OFF Time
[FET Driver]
HG Higher side ON resistor
HG Lower side ON resistor
LG Higher side ON resistor
LG Lower side ON resistor
[Dead Time]
HG rising
LG rising
HGdead
LGdead
-
-
50
50
-
-
nsec
nsec
HGhon
HGlon
LGhon
LGlon
-
-
-
-
3.0
2.0
2.0
0.5
6.0
4.0
4.0
1.0
Ω
Ω
Ω
Ω
Fosc
Ton
Tonmax
Toffmin
-
400
-
-
300
500
3
450
-
600
-
550
kHz
nsec
μsec
nsec
Vcc_UVLO
dVcc_UVLO
Vin_UVLO
dVin_UVLO
Vreg_UVLO
dVreg_UVLO
4.1
100
4.1
100
2.0
100
4.3
160
4.3
160
2.2
160
4.5
220
4.5
220
2.4
220
V
mV
V
mV
V
mV
Icc
Iin
Iccstb
Iinstb
Enlow
Enhigh
Ien
Vreg
-
-
-
-
GND
2.3
-
2.475
700
100
0
100
-
-
7
2.500
900
200
10
200
0.8
5.5
10
2.525
μA
μA
μA
μA
V
V
μA
V
EN=0V
EN=0V
Condition
Ireg=100μA
Ta=-10℃ to 100℃*
VCC:Sweep up
VCC:Sweep down
VIN:Sweep up
VIN:Sweep down
VREG:Sweep up
VREG:Sweep down
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© 2009 ROHM Co., Ltd. All rights reserved.
2/20
2009.04 - Rev.B
BD9575FV
●Electrical
characteristics – Continued
(unless otherwise noted, Ta=25℃ VCC=5V, VDD=5V, EN/SLLM=5V, VIN=12V, REF=1.8V, R
FS
=68kΩ)
Standard Value
Parameter
Symbol
Unit
MIN
TYP
MAX
[SCP]
SCP Detect Voltage
SCP threshold voltage
Charge current
Standby voltage
[OVP]
OVP Detect Voltage
[Soft start]
Charge current
Standby voltage
[Over Current Protection Block]
Current limit threshold1
Current limit threshold2
Reverse current limit threshold1
Reverse current limit threshold2
[VOUT setting ]
VOUT offset voltage1
VOUT bias current
REF bias current
Is+ Input current
Is- Input current
[SLLM ]
Continuous mode threshold
SLLM threshold
* Design Guarantee
Technical Note
Condition
Vscp
Vscpth
Iscp
Vscp_stb
V
OVP
Iss
Vss_stb
REF×0.65
1.2
1.5
-
REF×1.16
1.5
-
REF×0.7
1.25
2
-
REF×1.2
2
-
REF×0.75
1.3
2.5
50
REF×1.24
2.5
50
V
V
μA
mV
V
μA
mV
ILIM=0.5V
Ta=-20℃ to 100℃*
ILIM=2.0V
ILIM=0.5V
ILIM=2.0V
Ta=-20℃ to 100℃*
Ilim1
Ilim2
ReIlim1
ReIlim2
Voutoff1
Ivout
Iref
IIs+
IIs-
Vthcon
VthSLLM
43
160
-
-
REF-7m
-100
-100
-1
-1
VCC-0.5
GND
50
200
-50
-200
REF
0
0
0
0
-
-
57
240
-
-
REF+7m
100
100
1
1
VCC
0.5
mV
mV
mV
mV
V
nA
nA
μA
μA
V
V
Is+=1.8V
Is-=1.8V
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© 2009 ROHM Co., Ltd. All rights reserved.
3/20
2009.04 - Rev.B
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