R1283K1B-TR [RICOH]
DC-DC Regulated Power Supply Module, 2.70 X 3 MM, DFN-12;
| 型号： | R1283K1B-TR |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | DC-DC Regulated Power Supply Module, 2.70 X 3 MM, DFN-12 |
| 文件： | 总22页 (文件大小：416K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
R1283x series
2ch DCDC for CCD & OLED
NO.EA-157-071019
OUTLINE
The R1283X 2ch DC/DC converter is designed for CCD & OLED Display power source. It contains a step up
DC/DC converter and an inverting DC/DC converter to generate two required voltages by CCD & OLED Display.
Step up DC/DC converter generates boosted output voltage up to 20V. Inverting DC/DC converter generates
negative voltage up to Vin voltage minus 20V independently. Start up sequence is internally made. Each of the
R1283X series consists of an oscillator, a PWM control circuit, a voltage reference, error amplifiers, over current
protection circuits, short protection circuits, an under voltage lockout circuit (UVLO), an Nch driver for boost
operation, a Pch driver for inverting, and so on. A high efficiency boost and inverting DC/DC converter can be
composed with external inductors, diodes, capacitors, and resistors.
FEATURES
ꢀ
Operating Voltage・・・・ 2.5V ~ 5.5V
ꢀ
Step Up DC/DC (CH1)
Internal Nch MOSFET Driver (Ron=400mΩTyp.)
Adjustable Vout Up to 20V with external resistor
Internal Soft start function (Typ. 4.5ms)
Over Current Protection
Maximum Duty Cycle: 91%(Typ.)
ꢀ
Inverting DC/DC (CH2)
Internal Pch MOSFET Driver (Ron=400mΩ Typ.)
Adjustable Vout Up to Vdd-20V with external resistor
Auto Discharge function for negative output
Internal Soft start function (Typ. 4.5ms)
Over Current Protection
Maximum Duty Cycle: 91%(Typ.)
ꢀ
Short Protection with timer latch function (Typ. 50ms); Short condition for either or both two outputs
makes all output drivers off and latches./ If the maximum duty cycle continues for a certain time, these
output drivers will be turned off.
CE with start up sequence function
CH1→CH2 (R1283K001X)/CH2->CH1(R1283K002X) Selectable
UVLO function.
Operating Frequency Selection・・・・ 300kHz / 700kHz / 1400kHz
・・・・
DFN（PLP）12 ( 2.7mm x 3.0mm ) or WLCSP11( 1.5mm x 2.4mm )
ꢀ
Small package
APPLICATION
ꢀ
ꢀ
Fixed voltage power supply for portable equipment
Fixed voltage power supply for CCD,OLED,LCD
1
R1283x
BLOCK DIAGRAM
Timer
Current Limit
CC
PVCC
LX2
UVLO
PWM
Control
VREF
REF
Discharge
Control
－
+
FB2
FB1
VOUTN
－
+
LX1
GND
CE
PWM
Control
Sequence
Control
PGND
SELECTION GUIDE
The mask option for the ICs can be selected at the user's request. The selection can be made with designating the
part number as shown below.
R 1 2 8 3 X 0 0 X X - X X
←Part Number
a
c d
b
code
a
contents
Designation of Package Type
K：DFN(PLP)-2730-12
Z：WLCSP11
Designation of Start-up Sequence
1: first CH1, second CH2.
b
c
2: first CH2, second CH1.
Designation of Oscillator Frequency
A: 300kHz, B: 700kHz, C: 1400kHz
Designation of Taping Type
TR：DFN(PLP)-2730-12
E2：WLCSP11
d
*1：The WLCSP11 package of the oscillation frequency 300kHz is being developed.
2
R1283x
PIN CONFIGURATION
● DFN(PLP)-2730-12
● WLCSP-11
3
2
1
VFB1
NC
PGN
PVCC
GND
VFB1
VCC
12
11
10
9
8
7
1
2
3
4
5
6
PGND
PVCC
GND
VCC
LX1
LX2
VOUTN
A
B
C
D
LX1
LX2
CE
VOUTN
VFB2
CE
VFB2
VREF
VREF
Top View
Mark Side
Bump Side
Bottom View
PIN DESCRIPTIONS
DFN(PLP)
PIN No.
NAME
NC
L1
L2
V
CE
V2
V
V
V1
GND
PV
PGND
FUNCTION
1
2
3
4
5
6
7
8
9
No Connect
Switching pin for Step up DC/DC
Switching pin for Inverting DC/DC
Discharge pin for Negative output
Chip enable pin for the R1283
Feedback pin for Inverting DC/DC
Reference voltage output pin
Analog power source input pin
Feedback pin for Step up DC/DC
Analog GND pin
10
11
12
Power input pin
Power GND pin
WLCSP
PIN No.
NAME
PGND
V1
L1
PV
CE
FUNCTION
Power GND pin
Feedback pin for Step up DC/DC
Switching pin for Step up DC/DC
Power input pin
Chip enable pin for the R1283
Switching pin for Inverting DC/DC
Analog GND pin
Discharge pin for Negative output
Analog power source input pin
Reference voltage output pin
Feedback pin for Inverting DC/DC
A1
A2
A3
B1
B2
B3
C1
C3
L2
GND
V
V
V
V2
D1
D2
D3
3
R1283x
ABSOLUTE MAXIMUM RATINGS
(GND / PGND=0V)
Item
Symbol
VCC
6.5
Unit
V
VCC / PVCC pin Voltage
V1 pin Voltage
V2 pin Voltage
CE pin Voltage
Vpin Voltage
L1 pin Voltage
L1 pin Current
L2 pin Voltage
L2 pin Current
V
V
V
V
V1
I1
V2
I2
V
PD
-0.3~VCC+0.3
-0.7(*1)~VCC+0.3
-0.3~VCC+0.3
-0.7(*1)~VCC+0.3
-0.3~24
Internally Limited
VCC-24 ~ VCC+0.3
Internally Limited
VCC-24 ~ VCC+0.3
1000
V
V
V
V
V
V
V
Vpin Voltage
Power Dissipation
Temperature Range
Storage Temperature Range
mW
ºC
ºC
Topt
Ts
-40 ~ +85
-55 ~ +125
*1: In case the voltage range is from -0.7V to -0.3V, permissible current is 10mA or less.
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded ever for an
instant under any conditions. Moreover, such values for any two items must not be reached
simultaneously. Operation above these absolute maximum ratings may cause degradation or
permanent damage to the device. These are stress ratings only and do not necessarily imply
functional operation these limits.
ELECTRICAL CHARACTERISTICS
(Topt=25ºC)
TYP. MAX. Unit.
Symbol
VCC
Item
Conditions
MIN.
2.5
Operating Input Voltage
5.5
V
VCC=5.5V , FREQ=300kHz
VCC=5.5V , FREQ=700kHz
2.0
4.0
8.0
250
300
350
0.1
mA
mA
mA
uA
uA
uA
uA
V
CC consumption current
ICC1
ICC2
(switching)
VCC=5.5V , FREQ =1400 kHz
VCC=5.5V , FREQ=300kHz
VCC=5.5V , FREQ=700kHz
VCC consumption current
(at no switching)
VCC=5.5V , FREQ =1400 kHz
3
ISTB
Standby current
VCC=5.5V
Falling
VUVLO
1
2.05
2.15
2.25
V
UVLO detect voltage
UVLO released voltage
VUVLO1
+0.16
1.2
2.48
V
V
VUVLO2
VREF
Rising
1.172
1.228
VCC=3.3V
VREF voltage tolerance
+VFB2 +VFB2 +VFB2
∆VREF
/∆T
Ppm
/ºC
V
REF voltage
temperature coefficient
VCC=3.3V
-40ºC≦Topt≦85ºC
±150
∆VREF
/∆VCC
5
mV
VREF Line regulation
2.5≦VCC≦5.5V
4
R1283x
∆VREF
/∆IOUT
VCC=3.3V
5
mV
VREF Load regulation
0.1mA≦IOUT≦2mA
15
mA
V
ILIMREF
VFB1
VCC=3.3V , VREF=0V
V
REF short current limit
FB1 voltage tolerance
0.985
1.0
1.015
VCC=3.3V
V
∆VFB1
/∆T
VFB1 voltage
temperature coefficient
VCC=3.3V
-40ºC≦Topt≦85ºC
Ppm
/ºC
±150
-0.1
-25
0.1
25
µA
IFB1
VFB2
IFB2
VCC=5.5V , VFB1=0V or 5.5V
VCC=3.3V
V
V
V
FB1 input current
0
mV
FB2 voltage tolerance
FB2 input current
-0.1
0.1
µA
VCC=5.5V , VFB2=0V or 5.5V
VCC=3.3V
VCC=3.3V
240
600
300
700
360
800
kHz
kHz
Fosc
Oscillator frequency
VCC=3.3V
1200 1400 1600 kHz
86
91
%
Maxduty1
Maxduty2
TSS1
VCC=3.3V
CH1 Max. Duty cycle
CH2 Max. Duty cycle
CH1 soft start time
CH2 soft start time
Delay time for protection
LX1 ON resistance
LX1 Leakage current
LX1 current limit
86
91
%
VCC=3.3V
4.5
4.5
50
ms
ms
ms
mΩ
uA
A
VCC=3.3V , VFB1=0.9V
VCC=3.3V , VFB2=0.12V
VCC=3.3V
TSS2
20
1.0
1.0
TDLY
400
RLX1
VCC=3.3V
5
5
I OFF LX1
ILIMLX1
RLX2
VCC=5.5V , VLX1=20V
VCC=3.3V
1.5
400
mΩ
uA
A
VCC=3.3V
LX2 ON resistance
LX2 Leakage current
LX2 current limit
I OFF LX2
ILIMLX2
IVOUTN
VCEL
VCC=5.5V , VLX=-14.5V
VCC=3.3V
1.5
10
25
Ω
VCC=3.3V , VOUTN=-0.3V
VCC=2.5V
VOUTNDischarge current
0.3
V
CE “L” input voltage
CE “H” input voltage
CE “L” input current
CE “H” input current
1.5
-1.0
-1.0
V
VCEH
VCC=5.5V
1.0
1.0
uA
uA
ICEL
VCC=5.5V
ICEH
VCC=5.5V
5
R1283x
TYPICAL APPLICATION
C1
L1
D1
VOUT
1
LX1
C2
C3
VCC
R3
C5
R2
PGND
VFB1
R1
VOUTN
LX2
PVCC
D2
C1B
VOUT
2
R6
C6
L2
R5
EN
CE
VFB2
R4
GND
VREF
C4
ꢀ
Step-up DC/DC converter output voltage setting
The output voltage VOUT1 of the step-up DC/DC converter is controlled with maintaining the VFB1 as 1.0V.
VOUT1 can be set with adjusting the values of R1 and R2 as in the next formula. VOUT1 can be set equal or
less than 20V.
VOUT1 = VFB1 x (R1+R2) / R1
ꢀ
Inverting DC/DC converter output voltage setting
The output voltage VOUT2 of the inverting DC/DC converter is controlled with maintaining the VFB2 as 0V.
VOUT2 can be set with adjusting the values of R4 and R5as in the next formula.
VOUT2 = VFB2 - (VREF-VFB2) x R5 / R4
ꢀ
Auto Discharge Function
When CE level turns from ‘H’ to ‘L’ level, the R1283 goes into standby mode and switching of the outputs of
LX1 and LX2 will stop. Then dischage Tr. between VOUT2 and VCC turns on and discharges the negative
output voltage. When the negative output voltage is discharged to 0V, the Tr. turns off and the negative
output will be Hi-Z.
When the Auto discharge function is unnecessary ,VOUTN connect to VCC or make be Hi-Z.
CE
0V
Negative output
Hi-Z
Discharge
6
R1283x
ꢀ
Start up Sequence (R1283X001x)
When CE level turns from ‘L’ to ‘H’ level, the softstart of CH1 starts the operation. After detecting output
voltage of CH1（VOUT1） as the nominal level, the soft start of CH2 starts the operation.
CE
CH1 (VOUT1)
Soft start CH1
Soft Start CH2
0V
CH2 (VOUT2)
ꢀ
Start up Sequence (R1283X002x)
When CE level turns from ‘L’ to ‘H’ level, the softstart of CH2 starts the operation. After detecting output
voltage of CH2（VOUT2） as the nominal level, the soft start of CH1 starts the operation.
CE
CH1(VOUT1)
CH2(VOUT2)
Soft Start CH2
Soft start CH1
0V
ꢀ
Short protection circuit timer
In case that the voltage of VFB1 drops, the error amplifier of CH1 outputs "H". In case that the voltage of
VFB2 rises, the error amplifier of CH2 outputs "L". The built-in short protection circuit makes the ineternal
timer operate with detecting the output of the error amplifier of CH1 as "H", or the output of the error
amplifier of CH2 as "L". After the setting time will pass, the switching of LX1 and LX2 will stop.
To release the latch operatoion, make the Vcc set equal or less than UVLO level and restart or set the CE
pin as "L" and make it "H" again.
During the softstart operation of CH1and CH2, the timer operates independently from the outputs of the
error amplifiers. Therefore, even if the softstart cannot finish correctly because of the short circuit, the
protection timer function will be able to work correctly.
ꢀ
Phase Compensation of step-up DC/DC converter
DC/DC converter's phase may lose 180 degree by external components of L and C and load current.
Because of this, the phase margin of the system will be less and the stability will be worse. Therefore, the
phase must be gained.
A pole will be formed by external components, L and C.
F
pole ~ 1 / {2×π×√(L1×C2)} （CH1）
pole ~ 1 / {2×π×√(L2×C3)} （CH2）
F
Zero will be formed with R2, C5, R5, and C6.
F
zero ~ 1/(2×π×R2×C5)
（CH1）
（CH2）
Fzero ~ 1/(2×π×R5×C6)
Set the cut-off frequency of the Zero lower than the cut off frequency of the pole by L and C.
7
R1283x
ꢀ
To reduce the noise of Feedback voltage
If the noise of the system is large, the output noise affects the feedback and the operation may be unstable.
In that case, resistor values, R1, R2, R4, and R5 should be set lower and make the noise into the feedback
pin reduce. Another method is set R3 and R6 . The appropriate value range is from 1kΩ to 5kΩ.
ꢀ
Set a ceramic 1µF or more capacitor as C1B between VCC pin and GND. Set another 4.7µF or more
capacitor between PVcc and GND as C1.
ꢀ
ꢀ
Set a ceramic 1µF or more capacitor between VOUT1 and GND, and between VOUT2 and GND for each as
C2 and C3.Recommendation value range is from 4.7µF to 22µF.
Set a ceramic capacitor between VREF and GND as C4. Recommendation value range is from 0.1µF to
2.2µF.
Operation of Step-up DC/DC Converter and Output Current
＜Basic Circuit＞
IL2
Diode
Lx Tr
I
V
VIN
IL1
CL
＜Current through L＞
Continuous Mode
Discontinuous Mode
ILxmax
ILxmax
IL
IL
ILxmin
ILxmin
Tf
t
t
Ton
Toff
Ton
T=1/fosc
Toff
T=1/fosc
8
R1283x
There are two operation modes for the PWM control step-up switching regulator, that is the continuous
mode and the discontinuous mode.
When the LX Tr. is on, the voltage for the inductor L will be VIN. The inductor current (IL1) will be;
IL1 = VIN×Ton / ...................................................................................................................Formula1
When the Lx transistor turns off, power will supply continuously. The inductor current at off (IL2) will be;
IL2 = (VOUT-VIN)×Tf / L.........................................................................................................Formula2
In terms of the PWM control, when the Tf=Toff, the inductor current will be continuous, the operation of the
switching regulator will be continuous mode.
In the continuous mode, the current variation of IL1 and IL2 are same, therefore
VIN×Ton / L = (VOUT-VIN)×Toff / L.........................................................................................Formula3
In the continuous mode, the duty cycle will be
DUTY = Ton / (Ton+Toff) = (VOUT-VIN) / VOUT .........................................................................Formula4
If the input power equals to output power,
2
I
OUT = VIN ×Ton / (2×L×VOUT) ............................................................................................Formula5
When IOUT becomes more then Formula5 ,it will be continuous mode.
In this moment ,the peak current,Ilxmax flowing through the inductor is described as follows:
ILxmax = IOUT×VOUT / VIN + VIN×Ton /（2×L）......................................................................Formula6
ILxmax = IOUT×VOUT / VIN + VIN×Tx (VOUT-VIN) /（2×L×VOUT） ...........................................Formula7
Therefore,peak current is more than IOUT.Considering the value of Ilxmax,the condition of input and
output,and external components should be selected.
The explanation above is based on the ideal calculation,and the loss caused by Lx switch and external
components is not included.
The actual maximum output current is between 50% and 80% of the calculation.
Especially,when the IL is large,or VIN is low,the loss of VIN is generated with on resistance of the switch.As
for VOUT,VF(as much as 0.3V)of the diode should be considered.
Operation of Inverting DC/DC Converter and Output Current
＜Basic Circuit＞
Lx Tr
Diode
I
V
VIN
IL1
IL2
CL
Inductor
9
R1283x
＜Current through L＞
Discontinuous Mode
ILxmax
Continuous Mode
ILxmax
IL
IL
ILxmin
ILxmin
Tf
t
t
Ton
T=1/fosc
Toff
Ton
Toff
T=1/fosc
There are also two operation modes for the PWM control inverting switching regulator, that is the continuous
mode and the discontinuous mode.
When the LX Tr. is on, the voltage for the inductor L will be VIN. The inductor current (IL1) will be;
IL1 = VIN×Ton / L..................................................................................................................Formula8
Inverting circuit saves energy during on time of Lx Tr,and supplies the energy to output during off time,output
voltage opposed to input voltage is obtained. The inductor current at off (IL2) will be;
IL2 = VOUT×Tf / L.................................................................................................................Formula9
(The above formula and after, the absolute value of the negative output voltage is assumed to be
VOUT.
:Output voltage= -10V ,VOUT=10 )
In terms of the PWM control, when the Tf=Toff, the inductor current will be continuous, the operation of the
switching regulator will be continuous mode.
In the continuous mode, the current variation of IL1 and IL2 are same, therefore
VIN×Ton / L = VOUT×Toff / L .................................................................................................Formula10
In the continuous mode, the duty cycle will be:
DUTY = Ton / (Ton+Toff) = VOUT / (VOUT + VIN )......................................................................Formula11
If the input power equals to output power,
2
I
OUT = VIN ×Ton / (2×L×VOUT) ............................................................................................Formula12
When IOUT becomes more then Formula12 ,it will be continuous mode.
In this moment ,the peak current,Ilxmax flowing through the inductor is described as follows:
ILxmax = IOUT×VOUT / VIN + VIN×Ton / （2×L）........................................................................Formula13
ILxmax = IOUT×VOUT / VIN + VIN×VOUT×T / { 2×L×(VOUT + VIN ) }........................................Formula14
Therefore,peak current is more than IOUT.Considering the value of Ilxmax,the condition of input and
output,and external components should be selected.
The explanation above is based on the ideal calculation,and the loss caused by Lx switch and external
components is not included.
The actual maximum output current is between 50% and 80% of the calculation.
Especially,when the IL is large,or VIN is low,the loss of VIN is generated with on resistance of the switch.As
for VOUT,VF(as much as 0.3V)of the diode should be considered.
10
R1283x
TYPCAL CHARACTERISTICS
1) Output Voltage VS. Output Current
Topt=25°C
Topt=25°C
4.8
-4.2
-4.3
-4.4
-4.5
-4.6
VIN=2.8V
VIN=3.6V
VIN=4.2V
4.7
4.6
VIN=2.8V
VIN=3.6V
VIN=4.2V
4.5
4.4
0
50
100
150
200
0
50
100
150
200
IOUT2 [mA]
OUT
I
1 [mA]
Topt=25°C
Topt=25°C
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=5.0V
12.6
12.4
12.2
12.0
11.8
11.6
11.4
-7.2
-7.3
-7.4
-7.5
-7.6
-7.7
-7.8
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=5.0V
0
25
50
75
100
125
150
0
50
100
150
200
OUT
I
1 [mA]
OUT
I
2 [mA]
R1283x001B
R1283x001B
Topt=25°C
Topt=25°
C
4.8
4.7
4.6
4.5
4.4
-5.2
-5.3
-5.4
-5.5
-5.6
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=2.8V
VIN=3.6V
VIN=4.2V
0
50
100
150
1 [mA]
200
250
0
50
100
2 [mA]
150
200
OUT
I
OUT
I
11
R1283x
R1283x001B
R1283x001B
Topt=25°C
Topt=25°C
12.6
12.4
12.2
12.0
11.8
11.6
11.4
-7.2
-7.3
-7.4
-7.5
-7.6
-7.7
-7.8
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=5.0V
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=5.0V
0
50
100
150
200
250
0
100
200
300
IOUT1 [mA]
IOUT2 [mA]
R1283x001C
R1283x001C
Topt=25°C
Topt=25°C
-4.2
-4.3
-4.4
-4.5
-4.6
4.8
4.7
4.6
4.5
4.4
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=2.8V
VIN=3.6V
VIN=4.2V
0
50
100 150 200 250 300 350
IOUT1 [mA]
0
50
100
150
IOUT2 [mA]
200
250
300
R1283x001C
R1283x001C
Topt=25°C
Topt=25°C
12.6
12.4
12.2
12.0
11.8
11.6
11.4
-7.2
-7.3
-7.4
-7.5
-7.6
-7.7
-7.8
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=5.0V
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=5.0V
0
50
100
IOUT1 [mA]
150
200
250
0
50 100 150 200 250 300 350
IOUT2 [mA]
12
R1283x
2) Efficiency VS. Output Current
Topt=25℃ , VOUT2=-4.4V
Topt=25 , VOUT1=4.6V
VOUT1=4.6V , IOUT1=0mA
VOUT2=-4.4V , IOUT2=0mA
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
20
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
0
20 40 60 80 100 120 140 160
IOUT2 [mA]
0
20 40 60 80 100 120 140 160 180
IOUT1 [mA]
Topt=25°C , VOUT1=12V
VOUT2=-7.5V , IOUT2=0mA
Topt=25°C , VOUT2=-7.5V
VOUT1=12V , IOUT1=0mA
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
20
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=5 [V]
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=5 [V]
0
20 40 60 80 100 120 140 160
IOUT1 [mA]
0
20 40 60 80 100 120 140 160
IOUT2 [mA]
R1283x001B
R1283x001B
Topt=25°C , VOUT1=4.6V
VOUT2=-5.4V , IOUT2=0mA
Topt=25°C , VOUT2=-5.4V
VOUT1=4.6V , IOUT1=0mA
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
20
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
0
30
60
90
120 150 180
0
50
100
150
200
250
IOUT2 [mA]
IOUT1 [mA]
13
R1283x
R1283x001B
R1283x001B
Topt=25°C , VOUT1=12V
VOUT2=-7.5V , IOUT2=0mA
Topt=25°C, VOUT2=-7.5V
VOUT1=12V , IOUT1=0mA
100
90
80
70
60
50
40
30
20
10
100
90
80
70
60
50
40
30
20
10
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=5 [V]
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=5 [V]
0
40
80 120 160 200 240 280
0
30
60
90 120 150 180 210
IOUT1 [mA]
IOUT2 [mA]
R1283x001C
R1283x001C
Topt=25°C , VOUT2=-4.4V
Topt=25°C , VOUT1=4.6V
VOUT2=-4.4V , IOUT2=0mA
VOUT1=4.6V , IOUT1=0mA
100
90
80
70
60
50
40
30
20
10
100
90
80
70
60
50
40
30
20
10
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
0
40 80 120 160 200 240 280 320
IOUT1 [mA]
0
50
100
150
200
250
300
IOUT2 [mA]
R1283x001C
R1283x001C
Topt=25°C , VOUT2=-7.5V
VOUT1=12V , IOUT1=0mA
Topt=25°C , VOUT1=12V
VOUT2=-7.5V , IOUT2=0mA
100
90
80
70
60
50
40
30
20
10
100
90
80
70
60
50
40
30
20
10
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=5 [V]
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=5 [V]
0
40 80 120 160 200 240 280 320
IOUT2 [mA]
0
30 60 90 120 150 180 210 240
IOUT1 [mA]
14
R1283x
3) CE "L" Input Voltage VS. Temparature
R1283x00xx
4) CE "H" Input Voltage VS. Temparature
R1283x00xx
VIN=5.5V
VIN=2.5V
1.1
1
1.1
1
0.9
0.8
0.7
0.9
0.8
0.7
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
5) VFB1 Voltage VS. RTe1m28p3axra0t0uxrex
6) VFB2 Voltage VS. RTe1m28p3axra0t0uxrex
1.02
1.01
1
0.01
0.005
0
0.99
0.98
0.97
-0.005
-0.01
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
7) VREF Voltage VS. Temparature
R1283x00xx
8) UVLO Voltage VS. Temparature
R1283x00xx
1.22
1.21
1.2
2.4
2.35
2.3
UVLO Release
2.25
1.19
1.18
1.17
1.16
2.2
2.15
0
2.1
2.05
-40
-20
20
Topt [°C]
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
15
R1283x
9) LX1 ON Resistance VS. Temparature
R1283x00xx
10) LX2 ON Resistance VS. Temparature
R1283x00xx
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
11) LX1 Limit Current VS. Temparature
R1283x00xx
12) LX2 Limit Current VS. Temparature
R1283x00xx
2
1.8
1.6
1.4
1.2
1
2
1.8
1.6
1.4
1.2
1
-40
-20
0
20
40
60
80
-40
-20
0
20
Topt [°C]
40
60
80
Topt [°C]
13) Osillator Frequency VS. Temparature
R1283x00xB
800
750
700
650
600
350
330
310
290
270
250
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
16
R1283x
R1283x00xC
1600
1500
1400
1300
1200
-40
-20
0
20
40
60
80
Topt [°C]
14) Maxduty1 VS. Temparature
R1283x00xB
94
93
92
91
90
89
88
94
93
92
91
90
89
88
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
15) Maxduty2 VS. Temparature
R1283x00xC
92
91
90
89
88
87
86
94
93
92
91
90
89
88
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
17
R1283x
R1283x00xB
R1283x00xC
92
91
90
89
88
87
86
92
91
90
89
88
87
86
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
16) CH1 Soft-start Time VS. Temparature
R1283x00xx
17) CH2 Soft-start Time VS. Temparature
R1283x00xx
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
18) Timer Latch Delay Time VS. Temparature
R1283x00xx
19) VOUTN Discharge Current VS. Temparature
R1283x00xx
0
-20
-40
-60
-80
100
80
60
40
20
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
18
R1283x
20) Startup Response
R1283x001x
R1283x002x
IN
Topt=25°C , V =3.6V
Topt=25°C , VIN=3.6V
VOUT1=12V , VOUT2=-7.5V
OUT
OUT
V
1=12V , V 2=-7.5V
6
4
2
0
6
4
2
0
15
12
9
15
12
9
CE
VOUT1
6
6
3
0
3
0
-3
-6
-9
OUT
-3
-6
-9
VOUT2
0
5
10
15
20
0
5
10
Time [ms]
15
20
Time [ms]
21)Shut down Response
R1283x001x
R1283x001x (VOUTN=Open)
Topt=25°C , VIN=3.6V
VOUT1=12V , VOUT2=-7.5V
IOUT1=10mA
Topt=25°C , VIN=3.6V
VOUT1=12V , VOUT2=-7.5V
IOUT1=10mA
6
6
CE
4
2
0
4
2
0
15
15
12
9
12
9
VOUT1
VOUT1
6
6
3
0
3
0
VOUT2:not discharge
-3
-6
-9
-3
-6
-9
VOUT2 :discharge
0
5
10
15
20
0
5
10
15
20
Time [ms]
Time [ms]
R1283x002x
R1283x002x (VOUTN=Open)
Topt=25°C , VIN=3.6V
VOUT1=12V , VOUT2=-7.5V
Topt=25°C , VIN=3.6V
VOUT1=12V , VOUT2=-7.5V
IOUT1=10mA
IOUT1=10mA
6
6
4
2
0
4
CE
CE
2
0
15
15
12
9
12
9
VOUT1
VOUT1
6
6
3
0
-3
-6
-9
3
0
VOUT2:not discharge
-3
-6
-9
VOUT2:discharge
0
5
10
15
20
0
5
10
15
20
Time [ms]
Time [ms]
19
R1283x
22) Load Transient Response
Topt=25°C , VIN=3.6V
Topt=25°C , VIN=3.6V
-
-
50
200
100
0
0
-
-50
-100
-150
12.6
12.4
12.2
12.0
-7.3
-7.4
-7.5
-7.6
-7.7
0
1
2
3
4
5
0
1
2
3
4
5
Time [ms]
Time [ms]
R1283x00xB
R1283x00xB
Topt=25°C , VIN=3.6V
Topt=25°C , VIN=3.6V
-
-
50
12.5
12.3
12.1
11.9
11.7
11.5
200
100
0
0
-
-50
-100
-150
-7.3
-7.4
-7.5
-7.6
-7.7
0
1
2
3
4
5
0
1
2
3
4
5
Time [ms]
Time [ms]
R1283x00xC
R1283x00xC
Topt=25°C , VIN=3.6V
Topt=25°C , VIN=3.6V
-
-
50
12.5
12.3
12.1
11.9
11.7
11.5
200
100
0
0
-
-50
-100
-150
-7.3
-7.4
-7.5
-7.6
-7.7
0
1
2
3
4
5
0
1
2
3
4
5
Time [ms]
Time [ms]
20
R1283x
APPLIED CIRCUIT
1) Application with outputting power supply (+12V/-7.5V) for CCD from Li battery
3.6V
4.7uF
L1
SBD
VOUT1= 12V
10uF x 2
LX1
1kΩ
VCC
110kΩ
PGND
VFB
C5
1
10kΩ
VOUTN
LX2
PVCC
CE
SBD
-7.5V
VOUT2=
10uF
L2
1kΩ
C6
EN
75kΩ
VFB2
Ω
12k
GND
VREF
0.1uF
L1
15uH
L2
10uH
C5
220pF
C6
220pF
Inductor
SBD
VLF3010(TDK)
CR02(TOSHIBA)
R1283x00xA
R1283x00xB
R1283x00xC
6.8uH
4.7uH
6.8uH
4.7uH
150pF
220pF
150pF
220pF
2) Application with outputting power supply (+4.6V/-4.4V) for AMOLED from Li battery
3.6V
4.7uF
L1
SBD
V
VOUT1=
LX1
10uF
10uF
1kΩ
VCC
36k
Ω
PGND
C5
VFB1
10k
Ω
VOUTN
LX2
PVCC
CE
SBD
L2
V
4.4
VOUT2=
-
1kΩ
C6
EN
56kΩ
VFB
2
GND
Ω
15k
VREF
0.1uF
L1
15uH
L2
10uH
C5
100pF
C6
100pF
Inductor
SBD
VLF3010(TDK)
CR02(TOSHIBA)
R1283x00xA
R1283x00xB
R1283x00xC
4.7uH
4.7uH
4.7uH
4.7uH
47pF
68pF
33pF
47pF
21
R1283x
3)Application with output disconnect and discharge.
EN
SBD
VOUT
1
LX1
VCC
PGND
EN
VFB1
VOUTN
LX2
PVCC
CE
SBD
VOUT
2
EN
VFB2
GND
VREF
22
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