ROHM BD95500MUV Technical data

High Performance Regulators for PCs
Switching Regulator with MOSFET for DDR-SDRAM Cores
Description
BD95500MUV is a switching regulator with high output current (up to 6A) which can achieve low output voltage (0.7V to 5.0V) from a wide input voltage range (3V to 20V). High efficiency for the switching regulator can be realized by utilizing an internal N-MOSFET power transistor. A new technology called H 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 power good function are all built in. This switching regulator is specially designed for sets of various kinds.
Features
1) Integrated low ON resistance N-MOSFET (TYP. 50mΩ)
2) H
3) Adjustable Simple Light Load Mode (SLLM), and forced continuous mode
4) Thermal Shut Down (TSD), Under Voltage LockOut (UVLO), Adjustable Over Current Protection (OCP), Over Voltage Protection (OVP), Short Circuit Protection(SCP) built-in
5) Soft start function to minimize rush current during startup
6) Adjustable switching frequency (f=200KHz~1000KHz)
7) Built-in output discharge function
8) VQFN040V6060 Package
9) Tracking Function
10) Integrated boot strap diode
11) Power Good function
Applications
Mobile PC, Desktop PC, LCD-TV, Digital Components, etc
3
RegTM DC/DC converter controller
3
RegTM is a Rohm proprietary control method to
No.10030ECT21
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1/20
2010.05 - Rev.C
BD95500MUV
Technical Note
Maximum Absolute Ratings (Ta=25℃)
Parameter Symbol Ratings Unit
Input Voltage 1 VCC 7 *1 V
Input Voltage 2 VDD 7 *1 V
Input Voltage 3 VIN 24 *1 V
BOOT Voltage BOOT 30 V
BOOT-SW Voltage BOOT-SW 7 V
LG Voltage LG VDD V
REF Voltage REF VCC V
Output Voltage VOUT/Is+/Is- VCC V
ILIM/SS/FS/MODE Voltage ILIM/SS/FS/MODE VCC V
VREG Voltage VREG VCC V
EN Input Voltage EN 7 V
Output Current (Average) Isw 6 A
Power Dissipation 1 Pd1 0.54 *2 W
Power Dissipation 2 Pd2 1.00 *3 W
Power Dissipation 3 Pd3 3.77 *4 W
Power Dissipation 4 Pd4 4.66 *5 W Operating Temperature Range Topr -10~+100 Storage Temperature Range Tstg -55~+150 Junction Temperature Tjmax +150
*1 Not to exceed Pd, ASO, and Tjmax=150℃. *2 Reduced by 4.3mW for each increase in Ta of 1 over 25 (when don’t mounted on a heat radiation board ) *3 Reduced by 8.0mW for increase in Ta of 1 over 25. (when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB which has 1 layer. (Copper foil area : 0mm *4 Reduced by 30.1mW for increase in Ta of 1 over 25. (when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB which has 4 layers.
st
(1
and 4th copper foil area : 20.2mm2, 2nd and 3rd copper foil area : 5505mm2))
*5 Reduced by 37.3mW for increase in Ta of 1 over 25. (when mounted on a board 70.0mm×70mm×1.6mm Glass-epoxy PCB which has 4 layers. (All copper foil area : 5505mm
2
))
2
))
Operating Conditions (Ta=25℃)
Parameter
Symbol
MIN MAX
Ratings
Unit
Input Voltage 1 VCC 4.5 5.5 V
Input Voltage 2 VDD 4.5 5.5 V
Input Voltage 3 VIN 3.0 20 V
BOOT Voltage BOOT 4.5 25 V
SW Voltage SW -0.7 20 V
BOOT-SW Voltage BOOT-SW 4.5 5.5 V
MODE Input Voltage MODE 0 5.5 V
EN Input Voltage EN 0 5.5 V
Output Adjustable Voltage REF 0.7 2.0 V
Is Input Voltage Is+/Is- 0.7 2.7 V
MIN ON Time Tonmin - 200 nsec
*This product should not be used in a radioactive environment.
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2/20
2010.05 - Rev.C
BD95500MUV
Electrical characteristics (Unless otherwise noted, Ta=25, VCC=5V, VDD=5V, EN / MODE=5V, VIN=12V, REF=1.8V, RFS=68k
Parameter Symbol
[Whole Device]
VCC Bias Current Icc - 1200 2000 μA VIN Bias Current Iin - 100 200 μA VCC Standby Current Iccstb - 0 10 μA EN0V VIN Standby Current Iinstb - 0 10 μA EN0V EN Low Voltage Enlow GND - 0.8 V EN High Voltage Enhigh 2.3 - 5.5 V EN Bias Current Ien - 7 10 μA
VREG Voltage Vreg 2.475 2.500 2.525 V
[Under Voltage Locked Out ]
VCC Threshold Voltage Vcc_UVLO 4.1 4.3 4.5 V VCC:Sweep up VCC Hysteresis Voltage dVcc_UVLO 100 160 220 mV VCC:Sweep down VIN Threshold Voltage Vin_UVLO 2.4 2.6 2.8 V VIN:Sweep up VIN Hysteresis dVin_UVLO 100 160 220 mV VIN:Sweep down VREG Threshold Voltage Vreg_UVLO 2.0 2.2 2.4 V VREG:Sweep up VREG Hysteresis Voltage dVreg_UVLO 100 160 220 mV VREG:Sweep down
[H3REGTM Control Block]
ON Time Ton 400 500 600 nsec MAX ON Time Tonmax - 3 6.0 μsec MIN OFF Time Toffmin - 450 550 nsec
[FET Block]
High Side ON Resistance HGhon - 50 80 m Low Side ON Resistance HGlon - 50 80 m
[SCP Block]
SCP Start up Voltage Vscp REF×0.60 REF×0.70 REF×0.80 V Delay Time Tscp - 1.0 2.0 ms
[OVP Block]
OVP Detect Voltage Vovp REF×1.16 REF×1.2 REF×1.24 V
[Soft Start Block]
Charge Current Iss 2 4 6 μA Discharge Current Idis 0.5 1.0 2.0 μA Standby Voltage Vss_stb - - 50 mV
[Over Current Protection Block]
Current Limit Threshold 1 Ilim1 40 50 60 mV
Current Limit Threshold2 Ilim2 160 200 240 mV ILIM=2.0V
[Vout Setting]
VOUT Offset Voltage 1 Voutoff1 REF-10m REF REF+10m V Ta=-10 to 100 VOUT Bias Current Ivout -100 0 100 nA REF Bias Current Iref -100 0 100 nA Is+ Input Current IIs+ -1 0 1 μA Is+=1.8V Is- Input Current IIs- -1 0 1 μA Is-=1.8V
[MODE Block]
SLLM Threshold VthSLLM VCC-0.5 - VCC V Forced Continuous Mode VthCONT GND - 0.5 V Input Impedance RMODE - 400 - k
[Power Good Block]
VOUT Power Good Low Voltage VoutPL REF×0.85 REF×0.90 REF×0.95 V VOUT Power Good High Voltage VoutPH REF×1.05 REF×1.10 REF×1.15 V
Min. Typ. Max.
Limit
Unit Condition
Technical Note
Ireg=0 to 500uA, Ta =- 10 to 100℃*
ILIM=0.5V , Ta =- 10 to 100
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3/20
2010.05 - Rev.C
]
]
]
]
]
p
p
BD95500MUV
Reference Data
2.500
2.498
2.496
2.494
VREG[V
2.492
2.490
-101030 50 7090 Ta(℃)
2.20
2.15
2.10
2.05
VREG[V
2.00
1.95
Sweep down
1.90
-101030507090 Ta(℃)
Fig.4 Ta vs UVLO (VREG)
3
2
1
0
-1
VOUT-REF [mV
-2
-3
-101030507090
Fig.7 Ta vs VOUT Offset
Ta
(℃)
100
80
SLLM
60
[%]
η
40
20
0
0.001 0.01 0.1 1 10
Fig.10 Io vs Efficiency
(V
Forced Continuous
Io(mA)
IN=7V, VOUT=1.5V)
Sweep up
4.30
4.25
4.20
4.15
VCC[V]
4.10
4.05
4.00
-101030507090
Sweep u
Sweep down
Ta(℃)
Fig.2 Ta vs UVLO (VCC)
2.20
2.15
2.10
2.05
VREG[V
2.00
1.95
1.90
-101030 50 7090
Sweep up
Sweep down
Ta(℃)
Fig.5 Ta vs EN Threshold
54
52
50
Is [mV
48
46
-101030507090
ILIM=0.5V
Ta (℃)
Fig.8 Ta vs Current Limit
Threshold
100
80
60
[%]
η
40
20
0
0.001 0.01 0.1 1 10
SLLM
Forced Continuous
Io(mA)
Fig.11 Io vs Efficiency
(VIN=12V, VOUT=1.5V)
Technical Note
2.70
2.65
2.60
2.55
VIN[V]
2.50
2.45
2.40
-101030507090
Fig.3 Ta vs UVLO (VIN) Fig.1 Ta vs VREG
2.8
2.4
2.0
1.6
1.2
VREG(V)
0.8
0.4
0.0
01.534.56
Fig.6 Vcc vs VREG
400
360
320
280
frequency[kHz]
240
200
0 5 10 15 20 25
Fig.9 VIN vs f
100
80
60
[%]
η
40
20
0
0.001 0.01 0.1 1 10
SLLM
Fig.12 Io vs Efficiency
(V
IN=19V, VOUT=1.5V)
Ta(℃)
Vcc(V)
Io=0A
VIN( V)
Io(mA)
Sweep u
Sweep down
Middle: 25
Right: -10
Io=2A
Forced Continuous
Left: 100
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© 2010 ROHM Co., Ltd. All rights reserved.
4/20
2010.05 - Rev.C
BD95500MUV
Reference Data
VOUT
HG/LG
IOUT
Fig.13 Transient Response
IN=7V)
(V
VOUT
HG/LG
IOUT
Fig.16 Transient Response
(VIN=7V)
VOUT
IL
HG/LG
Fig.19 SLLM Mode
OUT=0A)
(I
IL
HG/LG/SW
Fig.22 Continuous Mode
(Io=0A)
IL
HG/LG/SW
VOUT
HG/LG
IOUT
Fig.14 Transient Response
(VIN=12V)
VOUT
HG/LG
IOUT
Fig.17 Transient Response
(VIN=12V)
VOUT
IL
HG/LG
Fig.20 SLLM Mode
OUT=0.4A)
(I
Fig.23 Continuous Mode
(Io=4A)
IL
HG/LG/SW
Technical Note
VOUT
HG/LG
IOUT
Fig.15 Transient Response
(VIN=19V)
VOUT
HG/LG
IOUT
Fig.18 Transient Response
(V
IN=19V)
VOUT
IL
HG/LG
Fig.21 SLLM Mode
OUT=1A)
(I
Fig.24 OCP Status
(Io=5A)
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5/20
2010.05 - Rev.C
V
BD95500MUV
Reference Data
VIN
HG/LG
VOUT
Fig.25 V
IN change
(519V)
1.52
1.51
1.50
Output Voltage [
1.49
Continuous
SLLM
1.48
0.001 0.01 0. 1 1 10
Iout [A]
Fig.28 IOUT vs VOUT
Block Diagram
EN
VDD
Vcc
5
Reference
39
Block
Vcc
PGOOD
V
REF
REF×0.85
SS×0.85
V
OUT
10
1
OUT
11
Thermal
Protection
Power
Good
EN/UVLO
TSD
6
VIN
ILIM
SCP
TSD
UVLO
VIN
SCP
8
VREG
Delay
SS
UVLO
GND F S
VIN
HG/LG
VOUT
37
H3RegTM
Controller
Block
Fig.26 V
IN change
(195V)
500
400
Continuous
300
Continuous
200
Frequency [kHz
100
0
0.001 0.01 0.1 1 10
SLLM
Iout [A]
Fig.29 IOUT vs f
SSVREGVINS
ILIM
ILIM
×
Current
Limit
0.1
9
OVP
SLLM/
MODE
13
2.5VReg
40
MODE N.C.
7
2.5V
REF×1.2
OUT
V
R Q
S
42
SLLM
Soft Start
Is+
Technical Note
EN
SS
OUT
V
PGOOD
Fig.27 EN wake up
60
50
40
]
30
Tc [
Δ
20
10
0
0123456
Io [A]
Fig.30 IOUT vs ΔTc
VDD
BOOT
SS
Driver
Circuit
12
Is-
38
31
VIN
|
36
22
SW
|
29
14
VDD
15
PGND
|
21
30
PGND
3
CE
C IN
3.3V
20V
V OUT
C
OUT
5V
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6/20
2010.05 - Rev.C
BD95500MUV
Technical Note
Pin Configuration
VIN
31
29 28 27 26 25 30
24 23 22
VIN
VIN
VIN
VIN
VIN
32
33
34
35
36
VINS
BOOT
EN
MODE
37
38
39
40
1 2 3 4 5
PGOOD
N.C.
ILIM CE
6
VC C GN D
7 8 9
VREG FS
*Connect the bottom side (FIN) to the ground terminal
Pin Function Table
PIN No. PIN name PIN function
1 PGOOD
Power Good Output Pin(+/-10% Window)
2 N.C.
3 CE
4 ILIM
5 VCC
6 GND
7 VREG
8 FS
9 SS/TRACK
10 REF
11 VO U T
12 Is-
13 Is+
14 VDD
15-21 PGND
22-29 SW
30 PGND
31-36 VIN
37 VINS
38 BOOT
39 EN
Ceramic Capacitor Reactive Pin
Current Limit Setting Pin
Power Supply Input pin (Control Block)
Sense GND
IC Reference Voltage (2.5V/500uA) Switching Frequency Adjustable Pin (30k~100kΩ)
Soft Start Setting Pin (w/ Capacitor)/Tracking Voltage Input Pin
Vo Setting Pin
Output Voltage Sense Pin
Current Sense Pin -
Current Sense Pin +
FET Driver Power Supply Pin (5V Input)
Power GND Pin
High Side FET Source Pin
Power GND Pin
Battery Voltage Input pin (3.3~20V Input)
Battery Voltage Sense pin
HG Driver Power Supply Pin
Enable Input pin (IC ON when High)
Control Mode Adjustment Pin
40 MODE
Low: Continuous High: SLLM
bottom FIN
Substrate connection
SS/
TRACK
PGND SW SW SW SW SW SW SW SW PGND
REF
-
21
10
20
19
18
17
16
15
14
13
12
11
PGND
PGND
PGND
PGND
PGND
PGND
VDD
Is+
Is-
VOUT
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7/20
2010.05 - Rev.C
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