Datasheet
Single-chip Type with Built-in FET Switching Regulator Series
Step-up and inverted Output
Power Supply for TFT-LCD Displays
BD83854MUV
General Description
BD83854MUV is a step-up switching regulator and
charge pump inverter for small TFT-LCD Displays. It has
a wide input voltage range of 2.5V to 4.5V that is
suitable for portable applications. In addition, its small
package design is ideal for miniaturizing the power
supply.
Key Specifications
■
■
■
■
■
■
■
■
Input Voltage Range
Output Boost Voltage
Output Inverted Voltage
Maximum Current
Operating Frequency
Efficiency
Output Voltage Accuracy
Standby Current
2.5V to 4.5V
5.4V(typ)
-5.4V(typ)
50mA(max)
1.0MHz(typ)
>85 %(typ)
±2 %(typ)
1µA(max)
Features
Wide input voltage range of 2.5V to 4.5V
High frequency operation
Output Discharge Independent ON/OFF
signal(STBYP, STBYN)
Circuit protection
Over Current Protection (OCP)
Short Current Protection (SCP)
Under Voltage Lock Out (UVLO)
Thermal Shutdown (TSD)
Package
W(Typ) x D(Typ) x H(Max)
Applications
TFT LCD Smart phones
TFT LCD Tablets
Typical Application Circuit
L
LX
4.7µH
UCSP50L1C
1.80mm
VQFN20PV3535
x 1.50mm x 0.57mm
3.50mm x 3.50mm x 1.00mm
LX
V
IN
2.5V to 4.5V
VIN
C1
4.7µF
PGND1
PGND2
AGND
VOUTP
C
VOP
4.7µF
C
CP
2.2µF
V-
-5.4V/max50mA
VREG_OUT
VREG_IN
VREG_CP
C
VREG
4.7µF
V+
5.4V/max50mA
STBYP
STBYN
CP1
CP2
VOUTN
C
VON
4.7µF
Figure 1. Application Circuit
〇Product
structure : Silicon monolithic integrated circuit
.
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111
•
15
•
001
〇This
product has no designed protection against radioactive rays
1/20
TSZ02201-0242AAJ00040-1-2
29.Aug.2014 Rev. 001
BD83854MUV
Contents
General Description ....................................................................................................................................................1
Features .......................................................................................................................................................................1
Applications ................................................................................................................................................................1
Key Specifications ......................................................................................................................................................1
Package
W(Typ) x D(Typ) x H(Max) .......................................................................................................................1
Typical Application Circuit .........................................................................................................................................1
Pin Configuration ........................................................................................................................................................3
Pin Description............................................................................................................................................................3
Block Diagram .............................................................................................................................................................4
Absolute Maximum Ratings (Ta = 25°C) ...................................................................................................................4
Recommended Operating Conditions ......................................................................................................................4
Electrical Characteristics (Unless otherwise specified V
IN
=3.7V Ta=25°C) ..........................................................5
Typical Performance Curves .....................................................................................................................................6
Application Information ........................................................................................................................................... 11
Description of Protection Circuits ....................................................................................................................... 11
Application Example .............................................................................................................................................13
Selection of External Components ......................................................................................................................13
Power Dissipation .....................................................................................................................................................14
I/O Equivalence Circuit .............................................................................................................................................15
Operational Notes .....................................................................................................................................................16
Ordering Information ................................................................................................................................................18
Marking Diagrams .....................................................................................................................................................18
Physical Dimension, Tape and Reel Information ...................................................................................................19
Revision History .......................................................................................................................................................20
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111
•
15
•
001
2/20
TSZ02201-0242AAJ00040-1-2
29.Aug.2014 Rev. 001
BD83854MUV
Pin Configuration
15
NC
14
AGND
13
AGND
12
STBYP
11
NC
16 VREG_CP
NC 10
17 CP1
VOUTP
9
18 PGND2
AGND
8
19 CP2
VOUTN
STBYN
PGND1
VREG_IN
7
VREG
_OUT
6
LX
20
VIN
1
2
NC
3
4
5
(Top view)
Figure 2. Pin assignment
(Bottom view)
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
-
Pin Name
STBYN
VIN
NC
PGND1
LX
VREG_OUT
VREG_IN
AGND
VOUTP
NC
NC
STBYP
AGND
AGND
NC
VREG_CP
CP1
PGND2
CP2
VOUTN
Back side
PAD
Charge pump inverter (V-) enable
Input voltage supply
No Connection
Boost Power ground
Boost converter switch
Boost converter output
Internal voltage supply
Analog ground
LDO output (V+)
No Connection
No Connection
LDO enable (V+)
Analog ground
Analog ground
No Connection
Internal voltage supply
Negative charge pump flying capacitor
Charge pump Power ground
Negative charge pump flying capacitor
Charge pump inverter (V-) output
Heat radiation PAD. This can be set to open or shorted to GND.
(if open, heat radiation capacity lessens)
Function
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111
•
15
•
001
3/20
TSZ02201-0242AAJ00040-1-2
29.Aug.2014 Rev. 001
BD83854MUV
Block Diagram
V
IN
(Battery Voltage)
C
VIN
4.7µF
L
LX
4.7µH
VREG_IN
VIN
PGND1
LX
VREG
VREG_CP
C
VREG
4.7µF
OCP
Backgate
Control
VREF
LDO
VOUTP
V+
C
VOP
4.7µF
TSD
UVLO
VREF
STBYP
STBYN
LOGIC
SOFT
START
SEQ.
VREF
OSC1M
BOOST
CONVERTER
SCP
VREG
UVLO
OSC500k
CP1
CHARGE
PUMP
PGND2
CP2
C
CP
2.2µF
OSC1M
REF
AGND
VREF
OSC500k
OSC1M
VREF
VOUTN
V-
C
VON
4.7µF
Figure 3. Block diagram
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Maximum power supply voltage
Symbol
VIN
STBYP,STBYN
LX
VOUTP
Pd1
Pd2
Tstg
Tjmax
Rating
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 7.0
0.30
0.57
-55 to +150
+150
Unit
V
V
V
V
W
W
°C
°C
Voltage range
Power dissipation (no mount)
Power dissipation
(note1)
Storage temperature range
Junction temperature
(Note 1) Derate by 4.55mW/°C when operating above Ta=25°C (when
mounted in ROHM’s standard board).
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
Standard value
Parameter
Power supply voltage
Operating temperature range
Symbol
VDD
Topr
MIN
2.5
-40
TYP
-
25
MAX
4.5
85
Units
V
°C
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111
•
15
•
001
4/20
TSZ02201-0242AAJ00040-1-2
29.Aug.2014 Rev. 001
BD83854MUV
Electrical Characteristics (Unless otherwise specified V
IN
=3.7V Ta=25°C)
Standard value
MIN
2.5
2.20
-
-
TYP
-
2.26
2.39
0.13
MAX
4.5
-
2.50
-
Parameter
【Power
Supply】
Input Voltage Range
UVLO Detect Voltage
UVLO UnDetect Voltage
UVLO Hysteresis Voltage
【Soft
Start Sequence】
VOUTP Soft Start Time
VOUTN Soft Start Time
【Boost
Converter】
LX Switching Frequency
LX OCP Current
VREG Output Voltage
VREGUVLO Voltage 1
VREGUVLO Voltage 2
【Output
VOUTP】
Output Voltage
Output Voltage Accuracy
Maximum Output Current
Line Regulation
Load Regulation
Discharge Resistor
【Output
VOUTN】
CP Switching Frequency
Output Voltage
Output Voltage Accuracy
Maximum Output Current
Line Regulation
Load Regulation
Discharge Resistor
【STBYP,STBYN】
STBY pin
Control voltage
Active
Non-active
Symbol
Unit
Conditions
V
IN
V
UVLO1
V
UVLO2
V
HYS
V
V
V
V
t
SSVP
t
SSVN
0.4
3.7
0.5
4.1
1.0
4.6
ms
ms
C
VOP
=4.7µF+4.7µF
C
VON
=4.7µF+6.8µF
f
SWLX
OCPLXL
V
VREG
V
RUVLO1
V
RUVLO2
0.90
0.6
5.50
1.9
4.35
1.00
-
5.65
2.1
4.55
1.10
-
5.80
2.3
4.75
MHz
A
V
V
V
Among Soft Start Operation
V
OUTP
V
OUTPAQ
I
OUTP
V
OPLINE
V
OPLOAD
R
OPDIS
5.292
-2
-
-
-
20
5.400
-
-
0.1
10
40
5.508
2
50
-
-
80
V
%
mA
%/V
mV
Ω
Iout=10mA
Iout=50mA
VREG=5.25V
f
SWCP
V
OUTN
V
OUTNAQ
I
OUTN
V
ONLINE
V
ONLOAD
R
ONDIS
450
-5.508
-2
-
-
-
10
500
-5.400
-
-
0.1
10
20
550
-5.292
2
50
-
-
40
kHz
V
%
mA
%/V
mV
Ω
Iout=10mA
Iout=50mA
VREG=5.25V
V
STBH
V
STBL
R
STB1
1.5
-0.3
500
-
-
800
VIN
0.3
1100
V
V
kΩ
STBY pin pull down resistance
【Circuit
current】
Standby current
Circuit current of operation VIN
I
STB
I
DD
-
1.3
0
2.5
1
5.0
µA
mA
STBYP=STBYN=L
STBYP=STBYN=H
VOUTP IL=0,VOUTN IL=0
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111
•
15
•
001
5/20
TSZ02201-0242AAJ00040-1-2
29.Aug.2014 Rev. 001
京公网安备 11010802033920号
EEWORLD
