Power Supply IC Series for TFT-LCD Panels
5V Input Multi-channel
System Power Supply IC
BD9862MUV
No.10035EAT16
●Description
The BD9862MUV is a 3ch system power supply for mobile TFT liquid crystal panels.Operable at VBAT=1.8V, CH2 & CH3
adopts the original PWM/PFM automatic switching control charge pump and realizes high efficiency in full-load range.
●Features
1) Input voltage range: 1.8V~4.5V (The input voltage can be 5.5V if a double charge pump is not used)
2) The step-up switching regulator has a built-in output FET (CH1)
3) There is a built-in PWM/PFM automatic switching charge pump circuit with a fixed PWM terminal (CH2,3)
4) Switching regulator oscillation frequency: MHz(typ.)
5) Charge pump oscillation frequency: 500kHz(typ.)
6) There is a built-in circuit to discontinue output (timer latch type) in the event of overload
7) Package VQFN024V4040
●Applications
Small & medium TFT liquid crystal displays etc.
●Absolute
Maximum Ratings (Ta = 25°C)
Parameter
Maximum adding power supply voltage
Maximum adding voltage
Symbol
VBAT
LX
FB1, INV1, INV2, UVLOSET, C2N,
VIN2A, CN, CP, CPOUT, REGOUT,
PWM, RT ,VREF ,NON3
VIN3, C3P, Vo2, C2P, VIN2B
Pd
Topr
Tstg
Tjmax
Ratings
-0.3 ~ 7
-0.3 ~ 18
-0.3~7
-0.3~15.5
0.34(*1)
0.70(*2)
-40 ~ +85
-55 ~ +150
+150
Unit
V
V
Power dissipation
Operating temperature range
Storage Temperature Range
Junction temperature
W
℃
℃
℃
(*1) When used as a stand-alone IC (for Ta=25℃ and over), the value is reduced by 27mW/℃.
(*2) When used for Printed Circuit Boards (glass epoxy board of 74.2mm×74.2mm×1.6mm) mounting
for Ta=25℃ and over, the value is reduced by 5.6mW/℃.
●Operating
Conditions(Ta=25℃)
Parameter
Power Supply Voltage
CH1Output Voltage
CH2 Output Voltage
CH3 Output Voltage
Starting capacity, adding charge pump
flying capacitor
Reversing capacity charge pump
flying capacitor
Starting charge pump Output capacitance
Switching regulator oscillation frequency
Charge pump oscillation frequency
CH1 PowerNMOS Drain current
Symbol
VBAT
Vo1
Vo2
Vo3
Cflys,Cflya
Cflyi
CCPOUT
fOSC1
fOSC2
Iidn1
MIN
1.8
-
-
-15
0.1
0.022
1.0
700
350
-
Ratings
TYP
-
-
-
-
0.22
0.047
2.0
1.0
500
-
MAX
4.5
(
※
1)
15
15
-
-
-
-
1.4
700
1.0
Unit
V
V
V
V
µF
µF
µF
MHz
kHz
A
CCPOUT≧Cfly*10
RRT=82kΩ~180kΩ
RRT=82kΩ~180kΩ
condition
(※1) When using a double charge pump for starting. 5.5V when not using a double charge pump
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1/16
2010.03 - Rev.A
BD9862MUV
●Electrical
Characteristics (unless otherwise specified,Ta=25℃,VBAT=2.5V)
Limits
Parameter
Symbol
MIN
TYP
MAX
【Starting
circuit part】
Output voltage
VBAT Voltage to start operation
【Soft
start part】
CH1Soft start time
CH2 Soft start time
CH3 Soft start time
【Oscillation
circuit
】
Switching regulator frequency
Charge Pump Frequency
【Regulator】
Output Voltage
【PWM
Comparator】
MAX Duty1
MAX Duty2
MAX Duty3
【Error
amplifier】
INV1Threshold Voltage
INV2Threshold Voltage
NON3Threshold Voltage
CH3 Error amplifier off set voltage
【Output
part(Switching Regulator
】
NMOSFET ON Resistance
Leak current when NMOSFET OFF
【Adding
step-up charge pump】
Output impedance
【Inverted
charge pump】
Output FET
ON resistance
PMOS
NMOS
RonP3
RonN3
RPWM
VPWMH
VPWML
Latch
UVth
UVhy
-
-
0.5
1.2
0
110
0.97
50
20
10
1
-
-
131
1.0
75
40
20
2
VBAT
0.3
150
1.03
100
Ω
VIN3=10V
R2
-
53
90
Ω
RonN1
IreakN1
0.2
-
0.45
-
0.7
10
Ω
µA
VINV1
VINV2
VNON3
Voffset
0.985
0.985
0.985
-50
1.0
1.0
1.0
0
1.015
1.015
1.015
50
V
V
V
mV
Dmax1
Dmax2
Dmax3
85
40
40
90
45
45
95
50
50
%
%
%
VREGOUT
3.4
3.5
3.6
V
fosc1
fosc2
0.9
450
1.0
500
1.1
550
MHz R
RT
=120kΩ
kHz R
RT
=120kΩ
Tss1
Tss2
Tss3
0.5
3.5
3.5
1.0
5.0
5.0
2.0
6.5
6.5
ms
ms
ms
R
RT
=120kΩ
R
RT
=120kΩ
R
RT
=120kΩ
Vcpout
Vst
3.7
-
4.2
-
4.7
1.8
V
V
Iout=0~10mA
Technical Note
Unit
Condition
Iout=0~10mA,VBAT=2.0V~4.5V
Making VREF as absolute value
REGOUT=3.5V
UVLOSET=0V
Io=0~10mA,VIN2A=3.5V,
VIN2B=10V,INV2=GND
【Control
Terminal Part】
PWM Terminal pull down resistance
PWM Terminal
control voltage
Timer Latch Time
【UVLO】
Relief voltage threshold
Hysteresis
【Circuit
current】
Circuit current during operation
(VBAT terminal inflow current)
◎It
is not the radiation-proof design for this product.
MΩ
V
V
ms
V
mV
VBAT=5V,
UVLOSET=INV1=INV2=5V
NON3=-0.2V
PWM Fixed mode
PWM/PFM Auto shift mode
R
RT
=120kΩ
Operation
Non-operation
【Short
circuit protection circuit】
IVBAT
0.4
0.8
1.6
mA
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2/16
2010.03 - Rev.A
BD9862MUV
●Power
Dissipation Reduction
Technical Note
4.5
4.0
3.5
①:
Stand-alone IC
②:
One-layer substrate
(Surface-layer heat release copper foil 0mm2)
③:
Four-layer substrate
(Surface and inside-layer heat release copper foil 10mm2)
(2, 3 layer heat release copper foil 5505mm2)
④:
Four-layer substrate
(All-layers heat release copper foil 5505mm2)
④
3.56W
Power Dissipation Pd
（
W)
3.0
2.5
①
②
③
④
:
θja
= 367.6℃/W
:
θja
= 178.6℃/W
:
θja
=
56.6℃/W
:
θja
=
35.1℃/W
③2.21W
2.0
1.5
1.0
0.5
0.0
0
25
50
75
②0.70W
①
0.34W
100
125
150
Ambient Temperature Ta
(℃)
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3/16
2010.03 - Rev.A
BD9862MUV
●Reference
Data(Unless specified Ta=25℃,VCC=2.5V,R
RT
=120kΩ)
Technical Note
90
85
80
75
70
65
60
55
50
45
40
1
90
L=15uH
85
L=4.7uH
80
75
70
65
10
Load current[mA]
100
0.1
1
Load current[mA]
10
PWM MODE
PWM/PFM MODE
50
PWM/PFM MODE
48
efficiency[%]
46
44
42
40
38
36
0.1
1
Load current[mA]
10
PWM MODE
efficiency[%]
Fig.1 CH1Current Load to Efficiency
(Vo1=10V)
3.6
Fig.2 CH2 Current Load to Efficiency
(VIN2A=3.5V,VIN2B=10V,Vo2=12V)
3.520
REGOUT voltage[V]
efficiency[%]
Fig.3 CH3 Current Load to Efficiency
(VIN3=10V,Vo3=-5V)
3.518
3.516
REGOUT voltage[V]
3.515
REGOUT voltage[V]
3.59
3.58
3.57
3.56
3.55
0
5
10
Load current[mA]
15
3.514
3.512
3.510
3.508
3.506
3.510
3.505
3.500
3.6
4.0
4.4
4.8
5.2
CPOUT voltage[V]
3.504
-40
-15
10
35
60
85
Ta[℃]
Fig.4 REGOUT
Output Load Regulation
1.006
INV1 threshold voltage[V]
INV2 threshold voltage[V]
1.006
Fig.5 REGOUT
Output Line Regulation
Fig.6 REGOUT Output Voltage
Temperature Feature
1.012
NON3 threshold voltage[V]
1.005
1.005
1.011
1.004
1.004
1.010
1.003
1.003
1.009
1.002
-40
-15
10
35
60
85
Ta[℃]
1.002
-40
-15
10
35
60
85
Ta[℃]
1.008
-40
-15
10
35
60
85
Ta[℃]
Fig.7 INV1 Threshold Voltage
Temperature Feature
Fig.8 INV2 Threshold Voltage
Temperature Feature
Fig.8 NON3 Threshold Voltage
Temperature Feature
100
90
80
70
60
50
40
30
20
10
0
0.6 0.8
1 1.2 1.4 1.6 1.8
FB1 voltage[V]
2
1015
1010
frequency[kHz]
1005
1000
995
990
985
-40
-15
10
35
Ta[℃]
60
85
frequency[kHz]
1050
1040
1030
1020
1010
1000
990
980
970
960
950
2
3
4
VBAT[V]
5
Duty[%]
Fig.10 CH1 FB1Voltage-
On Duty Feature
Fig.11 CH1 Switching Frequency
Temperature Feature
Fig.12 CH1 Switching Frequency
to VBAT Voltage Feature
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© 2010 ROHM Co., Ltd. All rights reserved.
4/16
2010.03 - Rev.A
BD9862MUV
●Reference
data(Unless specified Ta=25℃,VCC=2.5V)
Technical Note
1.01
1.005
1
0.995
0.99
0.985
0.98
0.975
0.97
0.965
0.96
0.955
-40
-15
10
35
Ta[℃]
60
85
5.08
5.06
soft start time[ms]
5.04
5.02
5
4.98
4.96
4.94
-40
-15
10
35
Ta[℃]
60
85
Max duty[%]
91.2
91.1
91
90.9
90.8
90.7
90.6
90.5
90.4
90.3
-40
-15
10
35
Ta[℃]
60
85
soft start time[ms]
Fig.13 CH1
Soft Start Temperature Feature
Fig.14 CH2,CH3
Soft Start Temperature Feature
Fig.15 CH1
Max Duty Temperature Feature
46
45.9
45.8
45.7
45.6
45.5
45.4
45.3
45.2
45.1
45
-40
-15
10
35
Ta[℃]
60
85
1500
1400
1300
frequency[kHz]
1200
1100
1000
900
800
700
600
60
80 100 120 140 160 180 200
R
RT
[kOhm]
Max duty[%]
Fig.16 CH2,CH3
Max Duty Temperature Feature
Fig.17 RT Resistance to CH1
Switching Frequency Feature
●Block
Diagram
CP CN
CPOUT
REGOUT
INV1
VBAT
VBAT
REGOUT
VBAT
VBAT
500kHz CLK
Ring OSC
for startup
SELECTOR
FB1
Error Amp1
CPOUT
CLK
×2
C.P.
CPOUT
1.2V
LDO
REGOUT
UVLO
H:Vout OFF
L:Vout ON
Soft
Start
PWM Comp1
LX
Step Up
Switching Control
VBAT
PFM
Control
1.0V
SS1 OK
REGOUTUVLO:L OK
INV2
VIN2A
DRIVER
PWM/PFM
Control
Max Duty CP
SS2 OK
Min Duty
PWM
VIN2B
C2N
PGND2
-
+
ref2
CLK Control
Comp
PWM Comp2
500kHz CLK
REGOUT
1MHz SLOPE
1.0V
CLK
Soft
Start
SS3 OK
Error Amp2
RT
OSC
GND
VBAT
TSD
VBAT
REGOUT
1.2V
Max Duty1
Max Duty CP
1/2 f
DISCHARGE
VREF & IREF
VBATUVLO:L
PWM
H：PWM
L：PWM/PFM Auto
VBATUVLO:L
Min Duty
VIN3
Error Amp3
VBAT
UVLOSET
-
+
1.0V/0.9V
VBATUVLO
H:IC OFF
L:IC ON
1.2V
VBAT
ref1(1.0V)
REGOUT
ref2(1.0V)
0.7V
INV1
ErrAmpOUT2
ErrAmpOUT3
2.0V
NON3
1.0V
CLK
Soft
Start
SS3 OK
SCPCOMP
SS2 OK
SS1 OK
Fig.18
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5/16
+
-
-
+
+
+
VBAT
VREF
SCP
COUNTER
-
+
1.0V
SCPOUT
CHI-CH3 Driver stop
CH1½CH3ドライバー停止
+
-
+
+
-
+
-
Max Duty1
PGND1
+
-
DRIVER
C2P
VO2
+
-
PWM Comp3
Max Duty CP
PWM/PFM
Control
DRIVER
C3P
Min Duty
PWM
PGND2
-
REGOUT
UVLO:L
VREF
Buffer
2010.03 - Rev.A
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