Datasheet
2.7V to 5.5V, 3A 1ch
Synchronous Buck Converter integrated FET
BD9139MUV
●General
Description
ROHM’s high efficiency step-down switching regulator
BD9139MUV is a power supply designed to produce a
low voltage including 0.8 volts from 5.5/3.3 volts power
supply line. Offers high efficiency with our original pulse
skip control technology and synchronous rectifier.
Employs a current mode control system to provide
faster transient response to sudden change in load.
●Features
Offers fast transient response with current mode
PWM control system.
Offers highly efficiency for all load range with
synchronous
rectifier
(Nch/Nch
FET)
and
SLLM(Simple Light Load Mode)
Incorporates soft-start function.
Incorporates thermal protection and ULVO
functions.
Incorporates short-current protection circuit with
time delay function.
Incorporates shutdown function
●Applications
Power supply for LSI including DSP, Micro computer and ASIC
●Typical
Application Circuit
VQFN016V3030
Rf
Cin
EN
VOUT
ADJ
L
ITH
RITH
CITH
GND,PGND
SW
ESR
CO
RO
VOUT
PVCC
VCC
CBST
Cf
●Key
Specifications
Input voltage range:
Output voltage range:
Output current:
Switching frequency:
High side FET ON resistance:
Low side FET ON resistance:
Standby current:
Operating temperature range:
●Package
VQFN016V3030:
2.7V to 5.5V
0.8V to 3.3V
3.0A (Max.)
1MHz(Typ.)
100mΩ(Typ.)
80mΩ(Typ.)
0µA (Typ.)
-40℃ to +105℃
(Typ.)
(Typ.)
(Max.)
3.00mm x 3.00mm x 1.00mm
VCC
Fig. 1
Typical application circuit
○Product
structure：Silicon monolithic integrated circuit
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©2012 ROHM Co., Ltd. All rights reserved.
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○This
product is not designed protection against radioactive rays.
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TSZ02201-0J3J0AJ00170-1-2
02.MAR.2012 Rev.001
BD9139MUV
●Pin
Configuration (TOP VIEW)
Datasheet
ITH
12
ADJ
11
EN
10
VCC
9
GND
13
8
7
6
5
1
SW
2
SW
3
SW
4
SW
BST
PVCC
PVCC
PVCC
PGND 14
PGND 15
PGND 16
Fig. 2 Pin Configuration
●Pin
Description
Pin
Pin
No.
name
1
2
3
4
5
6
7
8
SW
SW
SW
SW
PVCC
PVCC
PVCC
BST
SW pin
SW pin
SW pin
SW pin
Highside FET source pin
Highside FET source pin
Highside FET source pin
Bootstrapped voltage input pin
Function
Pin
No.
9
10
11
12
13
14
15
16
Pin
name
VCC
EN
ADJ
ITH
GND
PGND
PGND
PGND
Function
VCC power supply input pin
Enable pin(High Active）
Output voltage detect pin
GmAmp output pin/Connected phase
compensation capacitor
Ground
Lowside source pin
Lowside source pin
Lowside source pin
●Block
Diagram
EN
VREF
V
CC
VCC
BST
Current
Comp
+
R Q
S
Current
Sense/
Protect
+
SW
Driver
Logic
PVCC
Output
PVCC
3.3V
Input
Gm Amp
+
Soft
Start
SLOPE
CLK
OSC
VCC
UVLO
TSD
SCP
PGND
GND
ADJ
ITH
R
ITH
C
ITH
R1 R2
Fig. 3 Block Diagram
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TSZ22111½15½001
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TSZ02201-0J3J0AJ00170-1-2
02.MAR.2012 Rev.001
BD9139MUV
●Absolute
Maximum Ratings(Ta=25℃)
Parameter
V
CC
Voltage
PV
CC
Voltage
BST Voltage
BST_SW Voltage
EN Voltage
SW,ITH Voltage
Power Dissipation 1
Power Dissipation 2
Power Dissipation 3
Power Dissipation 4
Operating temperature range
Storage temperature range
Maximum junction temperature
＊1
＊2
＊3
＊4
＊5
Datasheet
Symbol
V
CC
PV
CC
V
BST
V
BST
-
SW
VEN
VSW,
VITH
Pd1
Pd2
Pd3
Pd4
Topr
Tstg
Tjmax
Limits
-0.3 to +7 *
-0.3 to +7 *
-0.3 to +7
-0.3 to +7
-0.3 to +7
0.27 *
0.62 *
1.77 *
2.66 *
2
3
4
5
1
1
Unit
V
V
V
V
-0.3 to +13
V
V
W
W
W
W
℃
℃
℃
2
-40 to +105
-55 to +150
+150
Pd should not be exceeded.
IC only
1-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 6.28mm
2
4-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 6.28mm , in each layers
4-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 5505mm
2
, in each layers
●Recommended
Operating Ratings(Ta=-40
to +105℃)
Parameter
Power Supply Voltage
EN Voltage
Output voltage Setting Range
SW average output current
＊6
＊7
Symbol
V
CC
PV
CC
V
EN
V
OUT
I
SW
Min.
2.7
2.7
0
0.8
-
Typ.
3.3
3.3
-
-
-
Max.
5.5
5.5
5.5
3.3*
3.0*
6
7
Unit
V
V
V
V
A
In case set output voltage 1.6V or more, VccMin = Vout+1.3V.
Pd should not be exceeded.
●Electrical
Characteristics
(Ta=25℃ V
CC
=PV
CC
=3.3V, EN=V
CC
, R
1
=10kΩ, R
2
=5kΩ, unless otherwise specified.)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Standby current
Active current
EN Low voltage
EN High voltage
EN input current
Oscillation frequency
High side FET ON resistance
Low side FET ON resistance
ADJ Voltage
ITH
SI
nk current
ITH
S
ource
C
urrent
UVLO threshold voltage
UVLO release voltage
Soft start time
Timer latch time
Output Short circuit
Threshold Voltage
I
STB
I
CC
V
ENL
V
ENH
I
EN
F
OSC
R
ONH
R
ONL
V
ADJ
I
THSI
I
THSO
V
UVLO1
V
UVLO2
T
SS
T
LATCH
V
SCP
-
-
-
2.0
-
0.8
-
-
0.788
10
10
2.400
2.425
0.5
0.5
-
0
200
GND
Vcc
3.3
1
100
80
0.800
18
18
2.500
2.550
1
1
0.40
10
500
0.8
-
10
1.2
165
135
0.812
-
-
2.600
2.700
2
2
0.56
µA
µA
V
V
µA
MHz
mΩ
mΩ
V
µA
µA
V
V
ms
ms
V
V
ADJ
=0.8V→0V
V
ADJ
=1V
V
ADJ
=0.6V
V
CC
=3.3V→0V
V
CC
=0V→3.3V
PV
CC
=3.3V
PV
CC
=3.3V
Standby mode
Active mode
V
EN
=3.3V
EN=GND
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TSZ02201-0J3J0AJ00170-1-2
02.MAR.2012 Rev.001
BD9139MUV
●Typical
Performance Curves
Datasheet
Fig.4 Vcc - VOUT
Fig.5 VEN - VOUT
Fig.6 IOUT - VOUT
Fig. 7 Ta - VOUT
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TSZ22111½15½001
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TSZ02201-0J3J0AJ00170-1-2
02.MAR.2012 Rev.001
BD9139MUV
Datasheet
Fig.8 Efficiency
Fig.9 Ta - Fosc
Fig.10 Ta – RONN, RONP
Fig.11 Ta - VEN
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©2012 ROHM Co., Ltd. All rights reserved.
TSZ22111½15½001
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TSZ02201-0J3J0AJ00170-1-2
02.MAR.2012 Rev.001
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