R1283Z001B-E2-F [RICOH]

DC-DC Regulated Power Supply Module, MODULE-11;


型号：	R1283Z001B-E2-F
厂家：	RICOH ELECTRONICS DEVICES DIVISION
描述：	DC-DC Regulated Power Supply Module, MODULE-11
文件：	总25页 (文件大小：523K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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 V^INvoltage 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 (R^ON=400mΩTyp.)

Adjustable V^OUTUp 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 (R^ON=400mΩ Typ.)

Adjustable V^OUTUp 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

R1283x

BLOCK DIAGRAM

Timer

Current Limit

VCC

PVCC

UVLO

Vref

PWM

Control

Maxduty

VREF

Discharge

Control

FB2

FB1

Vref

VOUTN

GND

PWM

Control

Sequence

Control

PGND

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

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

The products scheduled to be discontinued : "Non-promotion"

These products will be discontinued in the future. We advise you to select other products.

R1283x

PIN CONFIGURATIONS

• WLCSP-11-P2

• DFN(PLP)2730-12

Top View Bottom View

Top View

Bottom View

12 11 10

10 11 12

∗

PIN DESCRIPTIONS

• WLCSP-11-P2 (Non-promotion)

Pin No

Symbol

PGND

VFB1

Pin Description

Power GND pin

Feedback pin for Step up DC/DC

Switching pin for Step up DC/DC

Power Input pin

LX1

PVCC

Chip Enable pin for the R1283

Switching pin for Inverting DC/DC

Analog GND pin

LX2

GND

VOUTN

VCC

Discharge pin for Negative output

Analog power source Input pin

Reference Voltage Output pin

Feedback pin for Inverting DC/DC

VREF

VFB2

• DFN(PLP)2730-12

Pin No

Symbol

Pin Description

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

LX2

VOUTN

VFB2

VREF

VCC

VFB1

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.

R1283x

ABSOLUTE MAXIMUM RATINGS

(GND/PGND=0V)

Symbol

Item

Rating

6.5

Unit

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

−0.3 to V^CC+0.3

−0.7(∗1) to V^CC+0.3

−0.3 to V^CC+0.3

−0.7(∗1) to V^CC+0.3

−0.3 to 24

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

1000

Topt

Tstg

−40 to 85

°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.

R1283x

ELECTRICAL CHARACTERISTICS

• R1283x

Topt=25°C

Unit.

Symbol

Item

Conditions

Min.

Typ.

Max.

VCC

Operating Input Voltage

2.5

5.5

VCC=5.5V, FREQ=300kHz

VCC=5.5V, FREQ=700kHz

V^CC=5.5V, FREQ=1400kHz

VCC=5.5V, FREQ=300kHz

VCC=5.5V, FREQ=700kHz

V^CC=5.5V, FREQ=1400kHz

VCC=5.5V

2.0

4.0

8.0

μA

V^CCConsumption Current

(Switching)

ICC1

ICC2

250

300

350

0.1

V^CCConsumption Current

(At no switching)

Istandby

Standby Current

μA

VUVLO1

UVLO Detect Voltage

Falling

2.05

2.15

V^UVLO1

+0.16

1.2

2.25

VUVLO2

VREF

UVLO Released Voltage

VREF Voltage Tolerance

Rising

2.48

1.172

+V^FB2

1.228

+V^FB2

VCC=3.3V

+V^FB2

V^REFVoltage Temperature

Coefficient

∆VREF/∆Topt

ppm/ºC

V^CC=3.3V, −40ºC≤Topt≤85ºC

±150

∆VREF/∆VCC VREF Line Regulation

∆VREF/∆IOUT VREF Load Regulation

2.5V≤VCC≤5.5V

VCC=3.3V, 0.1mA≤IOUT≤2mA

VCC=3.3V, VREF=0V

VCC=3.3V

ILIMREF

VFB1

VREF Short Current Limit

VFB1 Voltage Tolerance

1.0

0.985

1.015

V^FB1Voltage Temperature

Coefficient

∆VFB1/∆Topt

ppm/ºC

V^CC=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

−0.1

−25

−0.1

240

600

1200

μA

kHz

VCC=5.5V, VFB2=0V or 5.5V

VCC=3.3V

0.1

300

700

1400

360

800

1600

fosc

Oscillator Frequency

VCC=3.3V

V^CC=3.3V

Maxduty1 CH1 Max. Duty Cycle

Maxduty2 CH2 Max. Duty Cycle

VCC=3.3V

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

mΩ

μA

tDLY

1.0

RLX1

VCC=3.3V

400

IOFFLX1

ILIMLX1

RLX2

VCC=5.5V, VLX1=20V

VCC=3.3V

1.5

LX2 ON Resistance

LX2 Leakage Current

LX2 Current limit

VCC=3.3V

400

mΩ

μA

IOFFLX2

ILIMLX2

RVOUTN

VCEL

VCEH

ICEL

V^CC=5.5V, VLX=−14.5V

VCC=3.3V

1.5

VOUTN Discharge Resistance

CE "L" Input Voltage

CE "H" Input Voltage

CE "L" Input Current

CE "H" Input Current

V^CC=3.3V, VOUTN=−0.3V

VCC=2.5V

0.3

VCC=5.5V

1.5

VCC=5.5V

1.0

−1.0

μA

ICEH

VCC=5.5V

R1283x

TYPICAL APPLICATION

V_OUT

L_X1

V_CC

PGND

V_FB

V_OUTN

LX2

PV_CC

C1B

V_OUT

V_FB

GND

V_REF

• 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.

V^OUT1can be set with adjusting the values of R1 and R2 as in the next formula. VOUT1 can be set equal or less

than 20V.

V^OUT1= 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.

V^OUT2can be set with adjusting the values of R4 and R5 as in the next formula.

V^OUT2= 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

L^X1and 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, V^OUTNconnect to VCC or make be Hi-Z.

Negative output

Hi-Z

Discharge

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(V^OUT1) as the nominal level, the soft start of CH2 starts the operation.

CH1 (V^OUT1)

Soft start CH1

Soft Start CH2

CH2 (V^OUT2)

• 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(V^OUT2) as the nominal level, the soft start of CH1 starts the operation.

CH1(V^OUT1)

Soft Start CH2

Soft start CH1

CH2(V^OUT2)

• 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 V^CCset 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.

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 PV^CCand 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

I^OUT

VOUT

V^IN

＜Current through L＞

Continuous Mode

ILxmax

Discontinuous Mode

ILxmax

ILxmin

ton

toff

ton

toff

T=1/fosc

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 L^XTr. is on, the voltage for the inductor L will be VIN. The inductor current (IL1) will be;

IL1 = V^IN× ton / L ............................................................................................................Formula1

When the Lx transistor turns off, power will supply continuously. The inductor current at off (IL2) will be;

IL2 = (V^OUT- 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

V^IN× 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,

I^OUT= VIN × ton / (2 × L × VOUT) .......................................................................................Formula5

When I^OUTbecomes more then Formula5, it will be continuous mode.

In this moment, the peak current, ILxmax flowing through the inductor is described as follows:

ILxmax = I^OUT× VOUT / VIN + VIN × ton / (2 × L).................................................................Formula6

ILxmax = I^OUT× 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 V^INis low, the loss of VIN is generated with on resistance of the switch. As

for V^OUT, VF(as much as 0.3V) of the diode should be considered.

R1283x

Operation of Inverting DC/DC Converter and Output Current

＜Basic Circuit＞

Lx Tr

Diode

I^OUT

VOUT

V^IN

IL1

IL2

Inductor

＜Current through L＞

Continuous Mode

ILxmax

Discontinuous Mode

ILxmax

ILxmin

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 L^XTr. is on, the voltage for the inductor L will be VIN. The inductor current (IL1) will be;

IL1 = V^IN× 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 = V^OUT× tf / L............................................................................................................ Formula9

(The above formula and after, the absolute value of the negative output voltage is assumed to be

V^OUT. :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

R1283x

V^IN× 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,

I^OUT= VIN × ton / (2 × L × VOUT) .....................................................................................Formula12

When I^OUTbecomes 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 I^OUT. 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 V^INis low, the loss of VIN is generated with on resistance of the switch. As

for V^OUT, VF (as much as 0.3V) of the diode should be considered.

R1283x

TYPICAL CHARACTERISTICS

TYPCAL CHARACTERISTICS

1) Output Voltage VS. Output Current

R1283x001A

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

100

150

200

100

150

200

I_OUT2 [mA]

I_OUT1 [mA]

R1283x001A

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

100

125

150

100

150

200

I_OUT1 [mA]

I_OUT2 [mA]

R1283x001B

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

100

150

200

250

100

150

200

I^OUT2 [mA]

I_OUT1 [mA]

R1283x

R1283x001B

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

100

150

200

250

100

200

300

I_OUT1 [mA]

I_OUT2 [mA]

R1283x001C

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

100

150

200

250 300

350

100

150

200

250

300

I_OUT1 [mA]

I_OUT2 [mA]

R1283x001C

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

100

150

200

250

100 150

200 250

300 350

I_OUT1 [mA]

I_OUT2 [mA]

R1283x

2) Efficiency

Output Current

VS.

R1283x001A

Topt=25 , V_OUT2=-4.4V

Topt=25 , V_OUT1=4.6V

℃

_OUT1=4.6V , I_OUT1=0mA

_OUT2=-4.4V , I_OUT2=0mA

100

VIN=2.8 [V]

VIN=3.6 [V]

VIN=4.2 [V]

VIN=2.8 [V]

VIN=3.6 [V]

VIN=4.2 [V]

80 100 120 140 160

_OUT2 [mA]

20 40 60 80 100 120 140 160 180

_OUT1 [mA]

R1283x001A

Topt=25°C , V_OUT1=12V

Topt=25°C , V_OUT2=-7.5V

_OUT2=-7.5V , I_OUT2=0mA

_OUT1=12V , I_OUT1=0mA

100

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]

80 100 120 140 160

20 40

60 80 100 120 140 160

I_OUT2 [mA]

_OUT1 [mA]

R1283x001B

Topt=25°C , V_OUT1=4.6V

Topt=25°C , V_OUT2=-5.4V

_OUT2=-5.4V , I_OUT2=0mA

_OUT1=4.6V , I_OUT1=0mA

100

VIN=2.8 [V]

VIN=3.6 [V]

VIN=4.2 [V]

VIN=2.8 [V]

VIN=3.6 [V]

VIN=4.2 [V]

120

150

180

100

150

200

250

I_OUT2 [mA]

I_OUT1 [mA]

R1283x

R1283x001B

Topt=25°C , V_OUT1=12V

Topt=25°C, V_OUT2=-7.5V

_OUT2=-7.5V , I_OUT2=0mA

_OUT1=12V , I_OUT1=0mA

100

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]

120 160

_OUT2 [mA]

200

240

280

120 150 180 210

I_OUT1 [mA]

R1283x001C

Topt=25°C , V_OUT2=-4.4V

Topt=25°C , V_OUT1=4.6V

_OUT1=4.6V , I_OUT1=0mA

_OUT2=-4.4V , I_OUT2=0mA

100

VIN=2.8 [V]

VIN=3.6 [V]

VIN=4.2 [V]

VIN=2.8 [V]

VIN=3.6 [V]

VIN=4.2 [V]

80 120 160 200 240 280 320

_OUT1 [mA]

100

150

_OUT2 [mA]

200

250

300

R1283x001C

Topt=25°C , V_OUT2=-7.5V

Topt=25°C , V_OUT1=12V

_OUT1=12V , I_OUT1=0mA

_OUT2=-7.5V , I_OUT2=0mA

100

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]

80 120 160 200 240 280 320

_OUT2 [mA]

90 120 150 180 210 240

_OUT1 [mA]

R1283x

3) CE "L" Input Voltage

TTeemmppearraattuurree

4) CE "H" Input Voltage

TTeemmppearraatuturree

VS.

R1283x00xx

VIN=5.5V

VIN=2.5V

1.1

0.9

0.8

0.7

0.9

0.8

0.7

-40

-20

-40

-20

Topt [°C]

5) VFB1 Voltage VS. Temparature

Temperature

6) VFB2 Voltage VS. Temparature

Temperature

R1283x00xx

1.02

1.01

0.01

0.005

0.99

0.98

0.97

-0.005

-0.01

-40

-20

-40

-20

Topt [°C]

7) VREF Voltage

Temparature

Temperature

8) UVLO Voltage

Temparature

VS.

Temperature

VS.

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

Topt [°C]

-40

-20

Topt [°C]

R1283x

9) LX1 ON Resistance

Temparature

Temperature

10) LX2 ON Resistance

Temparature

VS.

Temperature

VS.

R1283x00xx

0.8

0.6

0.4

0.2

0.8

0.6

0.4

0.2

-40

-20

-40

-20

Topt [°C]

11) LX1 Limit Current

Temparature

Temperature

12) LX2 Limit Current

Temparature

VS. Temperature

VS.

R1283x00xx

1.8

1.6

1.4

1.2

1.8

1.6

1.4

1.2

-40

-20

-40

-20

Topt [°C]

13) Osillator Frequency

TTeemmppearraattuurree

VS.

R1283x00xA

R1283x00xB

800

750

700

650

600

350

330

310

290

270

250

-40

-20

-40

-20

Topt [°C]

R1283x

R1283x00xC

1600

1500

1400

1300

1200

-40

-20

Topt [°C]

14) Maxduty1

Temparature

Temperature

VS.

R1283x00xA

R1283x00xB

-40

-20

-40

-20

Topt [°C]

15) Maxduty2

Temparature

Temperature

VS.

R1283x00xC

R1283x00xA

-40

-20

-40

-20

Topt [°C]

R1283x

R1283x00xB

R1283x00xC

-40

-20

-40

-20

Topt [°C]

16) CH1 Soft-start Time VS. Temparature

Temperature

17) CH2 Soft-start Time VS. Temparature

Temperature

R1283x00xx

-40

-20

-40

-20

Topt [°C]

18) Timer Latch Delay Time

Temparature

Temperature

19) VOUTN Discharge Current

Temparature

VS.

Temperature

VS.

R1283x00xx

-20

-40

-60

-80

100

-40

-20

-40

-20

Topt [°C]

R1283x

20) Startup Response

R1283x001x

R1283x002x

Topt=25°C , V_IN=3.6V

_OUT1=12V , V_OUT2=-7.5V

V_OUT

-3

-6

-9

-3

-6

-9

V_OUT

Time [ms]

21)Shut down Response

=Open)

OUTN

R1283x001x

Topt=25°C , V_IN=3.6V

_OUT1=12V , V_OUT2=-7.5V

I_OUT1=10mA

Topt=25°C , V_IN=3.6V

_OUT1=12V , V_OUT2=-7.5V

I_OUT1=10mA

V_OUT

V_OUT2:not discharge

-3

-6

-9

-3

-6

-9

V_OUT2 :discharge

Time [ms]

=Open)

OUTN

R1283x002x

Topt=25°C , V_IN=3.6V

V_OUT1=12V , V_OUT2=-7.5V

I_OUT1=10mA

Topt=25°C , V_IN=3.6V

_OUT1=12V , V_OUT2=-7.5V

I_OUT1=10mA

V_OUT

V_OUT2:not discharge

-3

-6

-9

-3

-6

-9

V_OUT2:discharge

Time [ms]

R1283x

22) Load Transient Response

R1283x00xA

Topt=25°C , V_IN=3.6V

200

100

-50

-100

-150

12.6

12.4

12.2

12.0

-7.3

-7.4

-7.5

-7.6

-7.7

Time [ms]

R1283x00xB

Topt=25°C , V_IN=3.6V

12.5

12.3

12.1

11.9

11.7

11.5

200

100

-50

-100

-150

-7.3

-7.4

-7.5

-7.6

-7.7

Time [ms]

R1283x00xC

Topt=25°C , V_IN=3.6V

12.5

12.3

12.1

11.9

11.7

11.5

200

100

-50

-100

-150

-7.3

-7.4

-7.5

-7.6

-7.7

Time [ms]

R1283x

APPLIED CIRCUIT

1) Application with outputting power supply (+12V/-7.5V) for CCD from Li battery

3.6V

4.7uF

SBD

V_OUT1= 12V

10uF x 2

L_X1

1kΩ

V_CC

110kΩ

PGND

V_FB

V_OUTN

L_X2

10kΩ

PV_CC

SBD

-7.5V

V_OUT2=

10uF

1kΩ

75kΩ

V_FB2

12k

GND

V_REF

0.1uF

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

SBD

4.6

V_OUT1=

L_X1

10uF

1kΩ

V_CC

36k

PGND

V_FB

10k

V_OUTN

L_X2

PV_CC

SBD

4.4

V_OUT2=

1kΩ

10uF

56kΩ

V_FB

GND

15k

V_REF

0.1uF

Inductor

VLF3010 (TDK)

R1283x00xA

R1283x00xB

R1283x00xC

15μH

4.7μH

10μH

4.7μH

100pF

47pF

68pF

100pF

33pF

47pF

SBD

CRS02 (TOSHIBA)

R1283x

3) Application with output disconnect and discharge.

SBD

V_OUT

L_X1

V_CC

PGND

V_FB1

V_OUTN

L_X2

PV_CC

SBD

V_OUT

V_FB2

GND

V_REF

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)

3-32-3, Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-8655, Japan

Phone: +81-3-5479-2857 Fax: +81-3-5479-0502

RICOH EUROPE (NETHERLANDS) B.V.

● Semiconductor Support Centre

“Nieuw Kronenburg”Prof. W.H. Keesomlaan 1, 1183 DJ, Amstelveen, The Netherlands

P.O.Box 114, 1180 AC Amstelveen

Phone: +31-20-5474-309 Fax: +31-20-5474-791

RICOH ELECTRONIC DEVICES KOREA Co., Ltd.

11 ﬂoor, Haesung 1 building, 942, Daechidong, Gangnamgu, Seoul, Korea

Phone: +82-2-2135-5700 Fax: +82-2-2135-5705

RICOH ELECTRONIC DEVICES SHANGHAI Co., Ltd.

Room403, No.2 Building, 690#Bi Bo Road, Pu Dong New district, Shanghai 201203,

People's Republic of China

Phone: +86-21-5027-3200 Fax: +86-21-5027-3299

RICOH COMPANY, LTD.

Electronic Devices Company

● Taipei oﬃce

Room109, 10F-1, No.51, Hengyang Rd., Taipei City, Taiwan (R.O.C.)

Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623

R1283Z001B-E2-F [RICOH]

相关型号：

R1283Z001C-E2-F

R1283Z002B-E2

R1283Z002B-E2-F

R1283Z002C-E2-F

R1283Z1B-E2

R1283Z1C-E2

R1283Z2A-E2

R1283Z2C-E2

R12844_15

R12857

R1285L001B

R1285L001B-TR-F