R1283Z001C-E2-F [RICOH]
DC-DC Regulated Power Supply Module, MODULE-11;![R1283Z001C-E2-F](http://pdffile.icpdf.com/pdf2/p00246/img/icpdf/R1283Z001C-E_1490945_icpdf.jpg)
型号: | R1283Z001C-E2-F |
厂家: | ![]() |
描述: | DC-DC Regulated Power Supply Module, MODULE-11 |
文件: | 总25页 (文件大小:523K) |
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R1283x SERIES
2ch DC/DC for CCD & OLED
OUTLINE
NO.EA-157-130509
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. A high efficiency boost and inverting DC/DC converter can be composed
with external inductors, diodes, capacitors, and resistors.
FEATURES
• Operating Voltage ......................................... 2.5V to 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
• Packages ...................................................... DFN(PLP)2730-12, WLCSP-11-P2 (Non-promotion)
APPLICATION
• Fixed voltage power supply for portable equipment
• Fixed voltage power supply for CCD, OLED, LCD
1
R1283x
BLOCK DIAGRAM
Timer
Current Limit
VCC
PVCC
UVLO
Vref
PWM
Control
L
X2
Maxduty
VREF
Discharge
Control
V
FB2
FB1
Vref
Vref
VOUTN
V
L
X1
GND
CE
PWM
Control
Sequence
Control
PGND
2
R1283x
SELECTION GUIDE
The start-up sequence, oscillator frequency, and the package for the ICs can be selected at the user’s
request.
Product Name
Package
Quantity per Reel
4,000 pcs
Pb Free
Yes
Halogen Free
WLCSP-11-P2
(Non-promotion)
Yes
Yes
R1283Z00x∗-E2-F
R1283K00x∗-TR
DFN(PLP)2730-12
5,000 pcs
Yes
x : The start-up sequence can be designated.
(1) Step-up → Inverting
(2) Inverting → Step-up
∗ : The oscillator frequency is the option as follows.
(A) 300kHz (A Version for 1283Z packaged in WLCSP-11-P2 is not available)
(B) 700kHz
(C) 1400kHz
The products scheduled to be discontinued : "Non-promotion"
These products will be discontinued in the future. We advise you to select other products.
3
R1283x
PIN CONFIGURATIONS
• WLCSP-11-P2
• DFN(PLP)2730-12
Top View Bottom View
Top View
Bottom View
12 11 10
9
8
7
7
8
9
10 11 12
3
2
1
3
2
1
∗
A
B
C
D
D
C
B
A
1
2
3
4
5
6
6
5
4
3
2
1
PIN DESCRIPTIONS
• WLCSP-11-P2 (Non-promotion)
Pin No
Symbol
PGND
VFB1
Pin Description
A1
Power GND pin
A2
Feedback pin for Step up DC/DC
Switching pin for Step up DC/DC
Power Input pin
A3
LX1
B1
PVCC
CE
B2
Chip Enable pin for the R1283
Switching pin for Inverting DC/DC
Analog GND pin
B3
LX2
C1
GND
VOUTN
VCC
C3
Discharge pin for Negative output
Analog power source Input pin
Reference Voltage Output pin
Feedback pin for Inverting DC/DC
D1
D2
VREF
VFB2
D3
• DFN(PLP)2730-12
Pin No
Symbol
NC
Pin Description
1
2
No Connect
LX1
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
3
LX2
4
VOUTN
CE
5
6
VFB2
7
VREF
VCC
8
9
VFB1
10
11
12
GND
PVCC
PGND
Power Input pin
Power GND pin
∗) Tab is GND level. (They are connected to the reverse side of this IC.)
The tab is better to be connected to the GND, but leaving it open is also acceptable.
4
R1283x
ABSOLUTE MAXIMUM RATINGS
(GND/PGND=0V)
Symbol
Item
Rating
6.5
Unit
V
VCC
VCC / PVCC pin Voltage
VFB1 pin Voltage
VFB2 pin Voltage
CE pin Voltage
VREF pin Voltage
LX1 pin Voltage
LX1 pin Current
LX2 pin Voltage
LX2 pin Current
VOUTN pin Voltage
VDTC
VFB
V
−0.3 to VCC+0.3
−0.7(∗1) to VCC+0.3
−0.3 to VCC+0.3
−0.7(∗1) to VCC+0.3
−0.3 to 24
V
V
V
V
A
V
A
V
VCE
VREF
VLX1
ILX1
Internally Limited
VCC−24 to VCC+0.3
Internally Limited
VCC−24 to VCC+0.3
1000
VLX2
ILX2
VNFB
Power Dissipation (WLCSP-11-P2) (Non-promotion) (∗2)
Power Dissipation (DFN(PLP)2730-12) (∗2)
Operating Temperature Range
PD
mW
1000
Topt
Tstg
−40 to 85
°C
°C
Storage Temperature Range
−55 to 125
∗1) In case the voltage range is from −0.7V to −0.3V, permissible current is 10mA or less.
∗2) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system using the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
5
R1283x
ELECTRICAL CHARACTERISTICS
• R1283x
Topt=25°C
Unit.
V
Symbol
Item
Conditions
Min.
Typ.
Max.
VCC
Operating Input Voltage
2.5
5.5
VCC=5.5V, FREQ=300kHz
VCC=5.5V, FREQ=700kHz
VCC=5.5V, FREQ=1400kHz
VCC=5.5V, FREQ=300kHz
VCC=5.5V, FREQ=700kHz
VCC=5.5V, FREQ=1400kHz
VCC=5.5V
2.0
4.0
8.0
mA
mA
mA
μA
μA
μA
VCC Consumption Current
(Switching)
ICC1
ICC2
250
300
350
0.1
VCC Consumption Current
(At no switching)
Istandby
Standby Current
3
μA
VUVLO1
UVLO Detect Voltage
Falling
2.05
2.15
VUVLO1
+0.16
1.2
2.25
V
VUVLO2
VREF
UVLO Released Voltage
VREF Voltage Tolerance
Rising
2.48
V
V
1.172
+VFB2
1.228
+VFB2
VCC=3.3V
+VFB2
VREF Voltage Temperature
Coefficient
∆VREF/∆Topt
ppm/ºC
VCC=3.3V, −40ºC≤Topt≤85ºC
±150
∆VREF/∆VCC VREF Line Regulation
∆VREF/∆IOUT VREF Load Regulation
2.5V≤VCC≤5.5V
5
5
mV
mV
mA
V
VCC=3.3V, 0.1mA≤IOUT≤2mA
VCC=3.3V, VREF=0V
VCC=3.3V
ILIMREF
VFB1
VREF Short Current Limit
VFB1 Voltage Tolerance
15
1.0
0.985
1.015
VFB1 Voltage Temperature
Coefficient
∆VFB1/∆Topt
ppm/ºC
VCC=3.3V, −40ºC≤Topt≤85ºC
±150
IFB1
VFB2
IFB2
VFB1 Input Current
VFB2 Voltage Tolerance
VFB2 Input Current
VCC=5.5V, VFB1=0V or 5.5V
VCC=3.3V
0.1
25
−0.1
−25
−0.1
240
600
1200
86
μA
mV
μA
kHz
kHz
kHz
%
0
VCC=5.5V, VFB2=0V or 5.5V
VCC=3.3V
0.1
300
700
1400
91
360
800
1600
fosc
Oscillator Frequency
VCC=3.3V
VCC=3.3V
Maxduty1 CH1 Max. Duty Cycle
Maxduty2 CH2 Max. Duty Cycle
VCC=3.3V
VCC=3.3V
86
91
%
tSS1
tSS2
CH1 Soft-start Time
CH2 Soft-start Time
Delay Time for Protection
LX1 ON Resistance
LX1 Leakage Current
LX1 Current limit
VCC=3.3V, VFB1=0.9V
VCC=3.3V, VFB2=0.12V
VCC=3.3V
4.5
4.5
50
ms
ms
ms
mΩ
μA
A
tDLY
20
1.0
1.0
RLX1
VCC=3.3V
400
IOFFLX1
ILIMLX1
RLX2
VCC=5.5V, VLX1=20V
VCC=3.3V
5
5
1.5
LX2 ON Resistance
LX2 Leakage Current
LX2 Current limit
VCC=3.3V
400
mΩ
μA
A
IOFFLX2
ILIMLX2
RVOUTN
VCEL
VCEH
ICEL
VCC=5.5V, VLX=−14.5V
VCC=3.3V
1.5
10
VOUTN Discharge Resistance
CE "L" Input Voltage
CE "H" Input Voltage
CE "L" Input Current
CE "H" Input Current
25
VCC=3.3V, VOUTN=−0.3V
VCC=2.5V
Ω
V
0.3
VCC=5.5V
1.5
V
VCC=5.5V
1.0
1.0
−1.0
−1.0
μA
μA
ICEH
VCC=5.5V
6
R1283x
TYPICAL APPLICATION
C1
L1
D1
VOUT
1
LX1
C2
VCC
R3
C5
R2
PGND
VFB
1
R1
VOUTN
LX2
PVCC
D2
C1B
VOUT
2
C3
R6
C6
L2
R5
EN
CE
VFB
2
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 × (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 R5 as in the next formula.
VOUT2 = VFB2 − (VREF−VFB2) × R5 / R4
• Auto Discharge Function
When CE level turns from "H" to "L" level, the R1283x 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
7
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)
Soft Start CH2
Soft start CH1
0V
CH2(VOUT2)
• 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 CH1 and 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
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.
Fpole ~ 1 / {2×π×√(L1×C2)} (CH1)
Fpole ~ 1 / {2×π×√(L2×C3)} (CH2)
Zero will be formed with R2, C5, R5, and C6.
8
R1283x
Fzero ~ 1/(2×π×R2×C5) (CH1)
Fzero ~ 1/(2×π×R5×C6) (CH2)
Set the cut-off frequency of the Zero close to the cut off frequency of the pole by L and C.
• 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
Inductor
IL1
Diode
Lx Tr
IOUT
VOUT
VIN
CL
<Current through L>
Continuous Mode
ILxmax
Discontinuous Mode
ILxmax
IL
IL
ILxmin
ILxmin
tf
t
t
ton
toff
ton
toff
T=1/fosc
T=1/fosc
9
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 / L ............................................................................................................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
IOUT = 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 × T × (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.
10
R1283x
Operation of Inverting DC/DC Converter and Output Current
<Basic Circuit>
Lx Tr
Diode
IOUT
VOUT
VIN
IL1
IL2
CL
Inductor
<Current through L>
Continuous Mode
ILxmax
Discontinuous Mode
ILxmax
IL
IL
ILxmin
ILxmin
Tf
t
t
toff
ton
ton
toff
T=1/fosc
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
11
R1283x
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
IOUT = 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.
12
R1283x
TYPICAL CHARACTERISTICS
1) Output Voltage VS. Output Current
R1283x001A
R1283x001A
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
4.5
4.4
VIN=3.6V
VIN=4.2V
0
50
100
150
200
0
50
100
150
200
IOUT2 [mA]
IOUT1 [mA]
R1283x001A
R1283x001A
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
IOUT1 [mA]
IOUT2 [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
200
250
0
50
100
150
200
IOUT2 [mA]
IOUT1 [mA]
13
R1283x
R1283x001B
R1283x001B
Topt=25°C
Topt=25°C
12.6
12.4
12.2
12.0
11.8
11.6
-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
11.4
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
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=2.8V
VIN=3.6V
VIN=4.2V
4.4
0
50
100
150
200
250 300
350
0
50
100
150
200
250
300
IOUT1 [mA]
IOUT2 [mA]
R1283x001C
R1283x001C
Topt=25°C
Topt=25°C
12.6
12.4
12.2
12.0
11.8
11.6
-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
11.4
0
50
100
150
200
250
0
50
100 150
200 250
300 350
IOUT1 [mA]
IOUT2 [mA]
14
R1283x
2) Efficiency
Output Current
VS.
R1283x001A
R1283x001A
Topt=25 , VOUT2=-4.4V
Topt=25 , VOUT1=4.6V
℃
V
OUT1=4.6V , IOUT1=0mA
V
OUT2=-4.4V , IOUT2=0mA
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
VIN=2.8 [V]
VIN=3.6 [V]
VIN=4.2 [V]
20
0
0
20
40
60
80 100 120 140 160
OUT2 [mA]
20 40 60 80 100 120 140 160 180
OUT1 [mA]
I
I
R1283x001A
R1283x001A
Topt=25°C , VOUT1=12V
Topt=25°C , VOUT2=-7.5V
V
OUT2=-7.5V , IOUT2=0mA
V
OUT1=12V , IOUT1=0mA
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
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]
20
0
20
40
60
I
80 100 120 140 160
0
20 40
60 80 100 120 140 160
IOUT2 [mA]
OUT1 [mA]
R1283x001B
R1283x001B
Topt=25°C , VOUT1=4.6V
Topt=25°C , VOUT2=-5.4V
V
OUT2=-5.4V , IOUT2=0mA
V
OUT1=4.6V , IOUT1=0mA
100
90
80
70
60
50
40
30
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]
20
0
0
30
60
90
120
150
180
50
100
150
200
250
IOUT2 [mA]
IOUT1 [mA]
15
R1283x
R1283x001B
R1283x001B
Topt=25°C , VOUT1=12V
Topt=25°C, VOUT2=-7.5V
V
OUT2=-7.5V , IOUT2=0mA
V
OUT1=12V , IOUT1=0mA
100
90
80
70
60
50
40
30
20
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]
10
0
0
40
80
120 160
OUT2 [mA]
200
240
280
30
60
90
120 150 180 210
I
IOUT1 [mA]
R1283x001C
R1283x001C
Topt=25°C , VOUT2=-4.4V
Topt=25°C , VOUT1=4.6V
V
OUT1=4.6V , IOUT1=0mA
V
OUT2=-4.4V , IOUT2=0mA
100
90
80
70
60
50
40
30
20
10
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]
10
0
40
80 120 160 200 240 280 320
OUT1 [mA]
0
50
100
150
OUT2 [mA]
200
250
300
I
I
R1283x001C
R1283x001C
Topt=25°C , VOUT2=-7.5V
Topt=25°C , VOUT1=12V
V
OUT1=12V , IOUT1=0mA
V
OUT2=-7.5V , IOUT2=0mA
100
90
80
70
60
50
40
30
20
10
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]
10
0
0
40
80 120 160 200 240 280 320
OUT2 [mA]
30
60
90 120 150 180 210 240
OUT1 [mA]
I
I
16
R1283x
3) CE "L" Input Voltage
Temperature
4) CE "H" Input Voltage
Temperature
VS.
VS.
R1283x00xx
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.
Temperature
6) VFB2 Voltage VS.
Temperature
R1283x00xx
R1283x00xx
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
Temperature
8) UVLO Voltage
VS.
Temperature
VS.
R1283x00xx
R1283x00xx
1.22
1.21
1.2
2.4
2.35
2.3
UVLO Release
UVLO Detect
2.25
2.2
1.19
1.18
1.17
1.16
2.15
2.1
2.05
-40
-20
0
20
Topt [°C]
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
17
R1283x
9) LX1 ON Resistance
Temperature
10) LX2 ON Resistance
T
VS.
Temperature
VS.
R1283x00xx
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
Temperature
12) LX2 Limit Current
VS. Temperature
VS.
R1283x00xx
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
40
60
80
Topt [°C]
Topt [°C]
13) Osillator Frequency
Temperature
VS.
R1283x00xA
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]
18
R1283x
R1283x00xC
1600
1500
1400
1300
1200
-40
-20
0
20
40
60
80
Topt [°C]
14) Maxduty1
Temperature
VS.
R1283x00xA
R1283x00xB
94
93
92
91
90
89
94
93
92
91
90
89
88
88
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
15) Maxduty2
Temperature
VS.
R1283x00xC
R1283x00xA
92
91
90
89
88
87
94
93
92
91
90
89
88
86
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Topt [°C]
Topt [°C]
19
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.
Temperature
17) CH2 Soft-start Time VS.
Temperature
R1283x00xx
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
Temperature
19) VOUTN Discharge Current
VS.
Temperature
VS.
R1283x00xx
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]
20
R1283x
20) Startup Response
R1283x001x
R1283x002x
Topt=25°C , VIN=3.6V
Topt=25°C , VIN=3.6V
V
OUT1=12V , VOUT2=-7.5V
V
OUT 1=12V , VOUT 2=-7.5V
6
4
2
0
6
4
2
0
15
12
9
CE
15
12
9
CE
VOUT
1
6
6
VOUT
1
3
3
0
0
VOUT
2
-3
-6
-9
-3
-6
-9
VOUT
2
0
5
10
Time [ms]
15
20
0
5
10
15
20
Time [ms]
21)Shut down Response
(V
=Open)
OUTN
R1283x001x
R1283x001x
Topt=25°C , VIN=3.6V
OUT 1=12V , VOUT 2=-7.5V
IOUT 1=10mA
Topt=25°C , VIN=3.6V
OUT 1=12V , VOUT 2=-7.5V
IOUT 1=10mA
V
V
6
4
2
0
6
CE
4
2
0
CE
15
15
12
9
12
9
VOUT
1
VOUT
1
6
6
3
3
0
0
VOUT 2:not discharge
-3
-6
-9
-3
-6
-9
VOUT 2 :discharge
0
5
10
15
20
0
5
10
Time [ms]
15
20
Time [ms]
(V
=Open)
OUTN
R1283x002x
R1283x002x
Topt=25°C , VIN=3.6V
VOUT1=12V , VOUT2=-7.5V
IOUT1=10mA
Topt=25°C , VIN=3.6V
OUT1=12V , VOUT2=-7.5V
IOUT 1=10mA
V
6
6
4
2
0
4
2
0
CE
CE
15
15
12
9
12
9
VOUT
1
VOUT
1
6
6
3
3
0
0
VOUT 2:not discharge
-3
-6
-9
-3
-6
-9
VOUT 2:discharge
0
5
10
15
20
0
5
10
15
20
Time [ms]
Time [ms]
21
R1283x
22) Load Transient Response
R1283x00xA
R1283x00xA
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]
22
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
C5
VFB
VOUTN
LX2
1
10kΩ
PVCC
CE
SBD
-7.5V
VOUT2=
10uF
L2
1kΩ
EN
75kΩ
C6
VFB2
Ω
12k
GND
VREF
0.1uF
L1
L2
C5
C6
Inductor
VLF3010 (TDK)
R1283x00xA
R1283x00xB
R1283x00xC
15μH
6.8μH
4.7μH
10μH
6.8μH
4.7μH
220pF
150pF
120pF
220pF
150pF
120pF
SBD
CRS02 (TOSHIBA)
2) Application with outputting power supply (+4.6V/-4.4V) for AMOLED from Li battery
3.6V
4.7uF
L1
SBD
4.6
V
VOUT1=
LX1
10uF
1kΩ
VCC
36k
Ω
PGND
VFB
C5
1
10k
Ω
VOUTN
LX2
PVCC
CE
SBD
V
4.4
VOUT2=
-
L2
1kΩ
10uF
EN
56kΩ
C6
VFB
2
GND
Ω
15k
VREF
0.1uF
L1
L2
C5
C6
Inductor
VLF3010 (TDK)
R1283x00xA
R1283x00xB
R1283x00xC
15μH
4.7μH
4.7μH
10μH
4.7μH
4.7μH
100pF
47pF
68pF
100pF
33pF
47pF
SBD
CRS02 (TOSHIBA)
23
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
24
1.The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest
information thereon.
2.The materials in this document may not be copied or otherwise reproduced in whole or in part
without prior written consent of Ricoh.
3.Please be sure to take any necessary formalities under relevant laws or regulations before
exporting or otherwise taking out of your country the products or the technical information
described herein.
4.The technical information described in this document shows typical characteristics of and
example application circuits for the products. The release of such information is not to be
construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual
property rights or any other rights.
5.The products listed in this document are intended and designed for use as general electronic
components in standard applications (office equipment, telecommunication equipment,
measuring instruments, consumer electronic products, amusement equipment etc.). Those
customers intending to use a product in an application requiring extreme quality and reliability,
for example, in a highly specific application where the failure or misoperation of the product
could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system,
traffic control system, automotive and transportation equipment, combustion equipment, safety
devices, life support system etc.) should first contact us.
6.We are making our continuous effort to improve the quality and reliability of our products, but
semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting from such failure, customers should be careful enough
to incorporate safety measures in their design, such as redundancy feature, firecontainment
feature and fail-safe feature. We do not assume any liability or responsibility for any loss or
damage arising from misuse or inappropriate use of the products.
7.Anti-radiation design is not implemented in the products described in this document.
8.Please contact Ricoh sales representatives should you have any questions or comments
concerning the products or the technical information.
For the conservation of the global environment, Ricoh is advancing the decrease of the negative environmental impact material.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that will be shipped from now on comply with RoHS Directive.
Basically after Apr. 1, 2012, we will ship out the Power Management ICs of the Halogen Free products only. (Ricoh Halogen Free products are
also Antimony Free.)
Halogen Free
RICOH COMPANY, LTD.
Electronic Devices Company
http://www.ricoh.com/LSI/
RICOH COMPANY, LTD.
Electronic Devices Company
● Higashi-Shinagawa Office (International Sales)
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