Datasheet
4.5V to 25V Input
1ch Synchronous Buck DC/DC Controller
BD95601MUV-LB
General Description
This is the product guarantees long time support in
industrial market.
BD95601MUV-LB is a high current buck regulator that
produces low output voltage (0.75V to 2.0V) from a wide
input voltage range (4.5V to 25V).High efficiency is
realized using external N channel MOSFETs.
3
TM
Using H Reg , Rohm’s advanced proprietary control
method that uses constant on-time control to provide
ultra-high transient responses to load changes.
SLLM (Simple Light Load Mode) technology is added to
improve efficiency with light loads giving high efficiency
over a wide load range. Soft start functionality, short
circuit protection with timer latch, over current protection
and tracking are all included features. This switching
regulator was designed for low voltage high current
power supplies.
Key Specifications
VIN Input Voltage Range：
VCC Input Voltage Range：
VDD Input Voltage Range：
Output Voltage Range：
Standby Current：
Operating Temperature Range：
4.5V to 25V
4.5V to 5.5V
4.5V to 5.5V
0.75V to 2.0V
0μA (Typ)
-10°C to +85°C
Package
VQFN020V4040
W(Typ) x D(Typ) x H(Max)
4.00mm x 4.00mm x 1.00mm
Features
Long Time Support Product for Industrial
Applications.
Adjustable Light Load and Selectable Continuous
Modes.
Multifunctional Protection Circuits.
-Thermal Shut down (TSD).
-Under Voltage Lock Out (UVLO).
-Over Current Protection (OCP).
-Over Voltage Protection (OVP).
-Short Circuit Protection (SCP).
Adjustable Soft Start.
Power Good Output.
200kHz to 500kHz Switching Frequency.
VQFN020V4040
Applications
FPGA, POL application.
Mobile PC, Desktop PC, LCD-TV, Digital Components
etc.
Industrial Equipment.
Typical Application Circuit
+12V
REG1_5V
PG_1
PG_2
C6
R7
C10
C11
PGOOD
GND
VIN
EN_1
EN_1MGT
EN_1.2
EN_1.35/1.5
EN_1.8
EN_2
R2
C1
BOOT
OUT
C12
20
1
2
R1
19
R8
18
17
C5
R6
C4
16
HG
15
SS
Q1
1V
1VMGT
EN/SLLM
U1
SW
14
L1
1.2V
C13
3
4
5
ILIM
BD95601MUV-LB
BD95371MUV
VDD
13
R13
C8
C3
C14
1.35/1.5V
1.8V
VCC
C2
LG
12
Q2
2V
FREQ
VOUT
FB
PGND
11
R4
R3
JP1
6
7
8
9
10
R12
R18
R20
R10
R5
C7
IS+
R11
GND
PGND
FS
Figure 1. Application Circuit
○Product
structure : Silicon monolithic integrated circuit
www.rohm.co.jp
© 2013 ROHM Co., Ltd. All rights reserved.
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○This
product has no designed protection against radioactive rays
IS-
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BD95601MUV-LB
VDD
SW
HG
LG
Pin Configuration
15 14 13 12 11
BOOT 16
VIN 17
OUT 18
PGOOD 19
GND 20
PGND
10 Is+
9 Is-
8 FS
7 FREQ
6 VOUT
1
SS
2
EN/SLLM
3
ILIM
4
VCC
5
FB
Figure 2. Pin Configuration
Pin Description
Pin No.
1
Pin Name
SS
Function
Soft Start Time input. The rise time is set by a capacitor connected between SS and
ground. At startup, a fixed current flows into the SS capacitor. Output voltage is
controlled until the SS input reaches the reference voltage of 0.75V.
Enable and Mode Selection Input. Voltage on this input selects the operating mode.
Standby Mode:
< 0.8V
Continuous Mode: 2.3V – 3.8V
Light Load Mode:
4.2V – 5.5V
Coil Current Limit input.
A 100KΩ resistor should be connected between this input and ground.
IC Internal Circuits Power input.
Output Voltage Sense input. A resistor divider to this input sets the output voltage.
Output Voltage Monitor input.
Current Sense Amplifier Output.
Frequency input. A resistor sets the switching frequency. The frequency can be set from
200kHz to 500kHz.
Input Current Sense Amplifier input. FREQ pin is output.
Output Current Sense Amplifier input. If the voltage between this pin and VOUT pin
reaches the specified voltage level (setting at ILIM pin), the switching is turned OFF.
Ground pin for Low-side FET driver.
This is the pin to drive the gate of the Low-side FET. This voltage swings between VDD
and PGND. High-speed gate driving for the Low-side FET is achieved using an output
MOS (3Ω when LG is high, 0.5Ω when LG is low.).
This is the power supply pin to drive the Low-side FET.
It is recommended that 10μF bypass capacitor be used to compensate for peak current
during the FET on/off transition.
This is the ground pin for High-side FET.
The maximum absolute rating is 30V from ground.
This is the pin to drive the gate of the High-side FET. The status of the switching swings
between BOOT and SW. High-speed gate driving for High-side FET is achieved using an
output MOS (3Ω when HG is high, 2Ω when HG is low).
This is the power supply pin to drive the High-side FET.
The maximum absolute ratings are 35V from ground and 7V from SW.
The switching waveform sweeps from (VIN+VDD) to VDD by BOOT operation.
3
TM
This is the pin for H Reg control. It determines necessary on-time by monitoring input
voltage. It is recommended to connect 1kΩ / 0.1μF CR filter.
This is the output pin of output voltage control amp. Please connect a resistor and
capacitor to ground in series.
It is recommended that a 0.01μF capacitor be established in normal operation.
Power Good output. This pin outputs a high-level when the FB pin voltage is above 63%
of the reference voltage.
This is an open drain pin and therefore requires an external pull-up.
Ground pin of control circuit. It is the same as FIN potential.
Backside thermal pad. Please connect to the Ground.
2
EN/SLLM
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
FIN
ILIM
VCC
FB
VOUT
FREQ
FS
Is-
Is+
PGND
LG
VDD
SW
HG
BOOT
VIN
OUT
PGOOD
GND
FIN
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BD95601MUV-LB
Block Diagram
VDD
VIN
4
VCC
17
VIN
TSD
1
SS
20
GND
VDD
GND
PGND
EN/SLLM
2
Reference
Block
REF×0.56
SS×0.56
FB
VOUT
+
-
BG
UVLO
Thermal
Protection
EN
SS
16
Soft Start Block
BOOT
VIN
HG
15
VOUT
SCP
2.5ms Delay
-
+
SLLM
REF×1.2
FB
BG
REF
H Reg
Controller
Block
3
TM
-
+
OVP
R
S
Q
SLLM
SLLM
Driver
Circuit
14
SW
VDD
13
EN/UVLO
OUT
18
FB
5
SS
REF
-
+
+
-
+
+
-
ls+ UVLO
ILIM
SCP
TSD
FS
OVP
Current Limit
ILIM
12
LG
11
PGND
19
+
-
Is+
REF
×0.63
FB
+
-
PGOOD
FREQ
7
9
ls-
10
Is+
8
VOUT
6
3
ILIM
Figure 3. Block Diagram
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BD95601MUV-LB
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Input Voltage 1
Input Voltage 2
Input Voltage 3
BOOT Voltage
BOOT-SW Voltage
HG-SW Voltage
LG Voltage
Output Voltage
EN Input Voltage
Power Dissipation 1
Power Dissipation 2
Power Dissipation 3
Power Dissipation 4
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Symbol
V
CC
V
DD
V
IN
BOOT
BOOT-SW
HG-SW
LG
V
OUT
/Is+/Is-
EN
Pd1
Pd2
Pd3
Pd4
Topr
Tstg
Tjmax
Rating
7
7
28
35
7
7
V
DD
V
CC
7
0.34
0.70
2.20
3.56
-10 to +85
-55 to +150
+150
Unit
V
V
V
V
V
V
V
V
V
W
W
W
W
°C
°C
°C
Note 1
Note 3
Note 4
Note 5
Note 6
Condition
Note 1, Note 2
Note 1, Note 2
Note 1, Note 2
Note 1, Note 2
Note 1, Note 2
Note 1, Note 2
(Note 1) Not to exceed Pd.
(Note 2) Instantaneous surge voltage, back electromotive force and voltage under less than 10% duty cycle.
(Note 3) Derating in done 2.7 mW/°C for operating above Ta
≥
25°C (when don’t mounted on a heat radiation board).
(Note 4) Derating in done 5.6 mW/°C for operating above Ta
≥
25°C (Mount on 1-layer 70.0mm x 70.0mm x 1.6mm board).
2
Surface heat dissipation copper foil:10.29mm .
(Note 5) Derating in done 17.6 mW/°C for operating above Ta
≥
25°C (Mount on 4-layer 70.0mm x 70.0mm x 1.6mm board
Two sides heat dissipation copperfoil:10.29mm
2
. 2 or 3-layer : heat dissipation copper foil : 5505mm
2
).
(Note 6) Derating in done 28.5 mW/°C for operating above Ta
≥
25°C (Mount on 4-layer 70.0mm x 70.0mm x 1.6mm board)
All layers heat dissipation copper foil:5505mm
2
.
Caution:
Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Recommended Operating Conditions
(Ta= 25°C)
Parameter
Input Voltage 1
Input Voltage 2
Input Voltage 3
BOOT Voltage
SW Voltage
BOOT-SW Voltage
EN Input Voltage
Is Input Voltage
MIN ON Time
Symbol
V
CC
V
DD
V
IN
BOOT
SW
BOOT-SW
EN
I
S+
/I
S-
T
ONMIN
Min
4.5
4.5
4.5
4.5
-0.7
4.5
0
0.7
-
Typ
-
-
-
-
-
-
-
-
-
Max
5.5
5.5
25
30
25
5.5
5.5
2.7
80
Unit
V
V
V
V
V
V
V
V
ns
Condition
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BD95601MUV-LB
Electrical Characteristics
(Unless otherwise specified VCC=5V VDD=5V EN=3V VIN=12V VOUT=1.05V RFS=36kΩ Ta=25°C)
Parameter
Whole Device
VCC Bias Current
VCC Stand-by Current
VIN Bias Current
VIN Stand-by Current
EN Low Voltage
EN High Voltage
(Forced Continuous Mode)
EN High Voltage
(SLLM Mode)
EN Bias Current
Under Voltage Locked Out
VCC Threshold Voltage
VCC Hysteresis Voltage
H Reg
3
TM
Symbol
Min
Typ
Max
Unit
Conditions
I
CC
I
CCSTB
I
IN
I
INSTB
EN
LOW
EN
HIGH
_
CON
EN
HIGH
_
SLLM
I
EN
V
CC
_
UVLO
dV
CC
_
UVLO
T
ON
T
ONMAX
T
OFFMIN
HG
HON
HG
LON
LG
HON
LG
LON
V
SCP
T
SCP
V
OVP
I
SS
V
SS
_
STB
I
ILIM
V
ILIM
R
EF1
I
S+
I
S-
V
PGOOD
R
ONPGOOD
V
F
-
-
-
-
GND
2.3
4.5
-
3.7
100
194
-
-
-
-
-
-
0.345
-
0.825
1
-
-
75
0.743
-1
-1
0.38
-
0.4
1500
0
30
0
-
-
-
15
4.0
160
219
3.5
490
3.0
2.0
3.0
0.5
0.420
2.5
0.900
2
-
10
100
0.750
0
0
0.47
50
0.5
1800
10
80
10
0.8
3.8
5.5
25
4.2
220
244
-
700
6.0
4.0
6.0
1.0
0.495
-
0.975
3
50
-
120
0.757
1
1
0.56
150
0.6
µA
µA
µA
µA
V
V
V
µA
V
mV
ns
µs
ns
Ω
Ω
Ω
Ω
V
ms
V
µA
mV
µA
mV
V
µA
µA
V
Ω
V
I
F
= 1mA
L
S+
= 1.05V
L
S-
= 1.05V
R
ILIM
= 100kΩ
EN= 3V
VCC:Sweep up
VCC:Sweep down
EN= 0V
EN= 0V
Control
ON Time
MAX ON Time
MIN OFF Time
FET Driver
HG High-side ON Resistance
HG Low-side ON Resistance
LG High-side ON Resistance
LG Low-side ON Resistance
SCP
SCP Start-up Voltage
SCP Delay Time
OVP
FB Threshold Voltage
Soft Start
Charge Current
Stand-by Voltage
Current Limit
Setting Current
Current Limit Threshold Voltage
Output Voltage Sense
Output Reference Voltage 1
Is+ Input Voltage
Is- Input Voltage
POWER GOOD
FB Power Good Voltage
Discharge ON Resistance
Diode for BOOT
V
F
Voltage
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