R1112N241A [RICOH]

Fixed Positive LDO Regulator, 2.4V, 0.29V Dropout, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN;


型号：	R1112N241A
厂家：	RICOH ELECTRONICS DEVICES DIVISION
描述：	Fixed Positive LDO Regulator, 2.4V, 0.29V Dropout, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN 光电二极管
文件：	总22页 (文件大小：294K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

'2000.3.13

LOW NOISE 150mA LDO REGULATOR

R1112N SERIES

n OUTLINE

The R1112N Series are voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ON-

resistance, and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit,

an error amplifier, resistors, a current limit circuit, and a chip enable circuit.

These ICs perform with low dropout voltage and a chip enable function. The line transient response and load transient

response of the R1112N Series are excellent, thus these ICs are very suitable for the power supply for hand-held

communication equipment.

The output voltage of these ICs is fixed with high accuracy. Since the package for these ICs are SOT-23-5 (Mini-mold)

package , high density mounting of the ICs on boards is possible.

n FEATURES

Ultra-Low Supply Current......................................... TYP. 100mA

Standby Mode ........................................................... TYP. 0.1mA

Low Dropout Voltage ................................................ TYP. 0.19V(I^OUT=100mA 3.0V Output type)

High Ripple Rejection............................................... TYP. 80dB(f=1kHz)

Low Temperature-Drift Coefficient of Output Voltage TYP. ±100ppm/°C

Excellent Line Regulation......................................... TYP. 0.05%/V

High Output Voltage Accuracy.................................. ±2.0%

Excellent Dynamic Response

Small Package ..........................................................SOT-23-5(Mini-mold)

Output Voltage...........................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is

possible

Built-in chip enable circuit ( 2 types; A: active low , B: active high)

Pin-out.......................................................................Similar to the LP2980/LP2985

Built-in fold-back protection circuit..........................TYP. 30mA (Current at short mode)

Ceramic capacitors recommended to be used with this IC

n APPLICATIONS

Power source for cellular phones such as GSM, CDMA and various kind of PCSs.

Power source for electrical appliances such as cameras, VCRs and camcorders.

Power source for battery-powered equipment.

Rev. 1.10

- 1 -

n BLOCK DIAGRAM

R1112NXX1A

R1112NXX1B

VOUT

Vref

Current Limit

GND

Rev. 1.10

- 2 -

n SELECTION GUIDE

The output voltage, the active type, the packing type, and the taping type for the ICs can be selected at the user's request. The

selection can be made by designating the part number as shown below :

R1112XXX1X-XX

¬Part Number

• • • •

b c d

Code

Contents

Designation of Package Type :

N:SOT-23-5 (Mini-mold)

Setting Output Voltage (V^OUT) :

Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.

Designation of Active Type :

A : active low type

B : active high type

Designation of Taping Type :

Ex. TR, TL (refer to Taping Specifications ;TR type is the standard direction.)

n PIN CONFIGURATION

SOT-23-5

OUT

(mark side)

GND

n PIN DESCRIPTION

Pin No.

Symbol

Description

V^DD

GND

Input Pin

Ground Pin

or CE

Chip Enable Pin

No Connection

Output pin

V^OUT

Rev. 1.10

- 3 -

n ABSOLUTE MAXIMUM RATINGS

Item

Symbol

V^IN

Rating

7.0

Unit

Input Voltage

Input Voltage(

or CE Pin)

V^CE

-0.3 ~ V^IN+0.3

200

Output Voltage

Output Current

Power Dissipation

V^OUT

IOUT

P^D

°C

250

Operating Temperature Range

Storage Temperature Range

Topt

Tstg

-40 ~ 85

-55 ~ 125

n ELECTRICAL CHARACTERISTICS

R1112NXX1A

Symbol

Topt=25°C

Item

Output Voltage

Output Current

Conditions

MIN.

TYP.

MAX.

V^OUT

´1.02

Unit

V^IN= Set V^OUT+1V

1mA £ I^OUT£ 30mA

V^IN- V^OUT= 1.0V

V^IN= Set V^OUT+1V

1mA £ I^OUT£ 80mA

V^OUT

´0.98

150

V^OUT

I^OUT

Load Regulation

Dropout Voltage

DV^OUT/DI^OUT

Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT

VOLTAGE

V^DIF

I^SS

Istandby

Supply Current

Supply Current (Standby)

V^IN= Set V^OUT+1V

V^IN= V^CE= Set V^OUT+1V

100

0.1

170

1.0

Set V^OUT+0.5V £ V^IN£ 8V

I^OUT= 30mA

f = 1kHz, Ripple 0.5Vp-p

V^IN= Set V^OUT+1V

Line Regulation

Ripple Rejection

0.05

0.20

%/V

DV^OUT/DV^IN

V^IN

Input Voltage

2.0

6.0

I^OUT= 30mA

-40°C £ Topt £ 85°C

V^OUT= 0V

ppm

/°C

Output Voltage

Temperature Coefficient

Short Current Limit

±100

DV^OUT/DT

Ilim

R^PU

Pull-up Resistance

Input Voltage “H”

Input Voltage “L”

2.5

1.5

V^IN

V^CEH

V^CEL

0.25

Output Noise

BW=10Hz to 100kHz

eⁿ

mVrms

Rev. 1.10

- 4 -

R1112NXX1B

Symbol

Topt=25°C

Item

Output Voltage

Output Current

Conditions

V^IN= Set V^OUT+1V

1mA £ I^OUT£ 30mA

V^IN- V^OUT= 1.0V

V^IN= Set V^OUT+1V

1mA £ I^OUT£ 80mA

MIN.

V^OUT

´0.98

150

TYP.

MAX.

V^OUT

´1.02

Unit

V^OUT

I^OUT

Load Regulation

DV^OUT/DI^OUT

Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT

VOLTAGE

V^DIF

I^SS

Dropout Voltage

Supply Current

V^IN= Set V^OUT+1V

V^CE=GND

100

170

Istandby

Supply Current (Standby)

0.1

1.0

Set V^OUT+0.5V £ V^IN£ 8V

Line Regulation

Ripple Rejection

0.05

0.20

6.0

%/V

DV^OUT/DV^IN

I^OUT= 30mA

f = 1kHz, Ripple 0.5Vp-p

V^IN= Set V^OUT+1V

V^IN

Input Voltage

Output Voltage

2.0

ppm

/°C

I^OUT= 30mA

-40°C £ Top t £ 85°C

V^OUT= 0V

±100

DV^OUT/DT

Temperature Coefficient

Short Current Limit

CE Pull-down Resistance

CE Input Voltage “H”

CE Input Voltage “L”

Ilim

R^PD

V^CEH

V^CEL

2.5

1.5

V^IN

0.25

Output Noise

BW=10Hz to 100kHz

mVrms

eⁿ

ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE

Topt = 25°C

Dropout Voltage

Output Voltage

DIF

(V)

OUT

(V)

Condition

TYP.

0.32

0.28

0.25

0.20

0.19

MAX.

0.55

0.47

0.35

0.29

0.26

1.5 £ V^OUT£ 1.6

1.7 £ V^OUT£ 1.8

1.9 £ V^OUT£ 2.3

2.4 £ V^OUT£ 2.7

2.8 £ V^OUT£ 5.0

I^OUT= 100mA

Rev. 1.10

- 5 -

n OPERATION

R1112NXX1A

R1112NXX1B

VDD

VOUT

VDD

VOUT

Vref

Current Limit

GND

In these ICs, fluctuation of Output Voltage, V^OUTis detected by Feed-back Registers R1, R2, and the result is compared with a

reference voltage by Error Amplifier, so that a constant voltage is output. A current limit circuit for protection at short mode

and a chip enable circuit are included.

Rev. 1.10

- 6 -

n TECHNICAL NOTES

When using these ICs, consider the following points:

Phase Compensation

In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be

sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance).

We use Ceramic Capacitors for evaluation of these ICs.

Recommended Capacitors; GRM40X5R225K6.3 (Murata)

GRM40-034X5R335K6.3 (Murata)

GRM40-034X5R475K6.3 (Murata)

(Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation,

the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the

PCB.)

PCB Layout

Make VDD and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise or

unstable operation. Connect a capacitor with a capacitance value of 2.2mF or more between VDD and GND pin as close as

possible.

Set external components, especially output capacitor as close as possible to the ICs and make wiring shortest.

Rev. 1.10

- 7 -

n TEST CIRCUITS

VOUT

R1112Nxx1B

Series

OUT

R1111Nxx1B Series

Series

OUT

2.2µF

GND

0.1µF

2.2mF

Fig.1 Standard test Circuit

Fig.2 Supply Current Test Circuit

VOUT

OUT

R1112Nxx1B

R1111Nxx1B Series

R1112Nxx1B

R1111Nxx1B Series

Series

OUT

P. G

GND

1µF

2.2mF

I1 I2

Fig.3 Ripple Rejection, Line Transient Response Test

Circuit

Fig.4 Load Transient Response Test Circuit

Rev. 1.10

- 8 -

n TYPICAL APPLICATION

R1112Nxx1A

Series

R1111NXX1A

R1112Nxx1B

Series

VDD

OUT

VDD

OUT

R1111Nxx1B

GND

Cap.

(External Components)

Output Capacitor; Ceramic 2.2mF(Set Output Voltage in the range from 2.5 to 5.0V)

Ceramic 4.7mF (Set Output Voltage in the range from 1.5 to 2.5V)

Input Capacitor; Ceramic 2.2mF

Rev. 1.10

- 9 -

n TYPICAL CHARACTERISTICS

1) Output Voltage vs. Output Current

R11x2N151B

R11x2N201B

2.5

1.8

1.6

1.4

VIN=2.3V

VIN=2.0V

1.2

VIN=2.5V

VIN=3.0V

VIN=4.0V

VIN=2.5V

1.5

VIN=3.5V

0.8

0.6

0.4

0.2

0.5

100

200

300

400

500

100

200

300

400

500

Output Current Iout[mA]

R11x2N301B

R11x2N401B

3.5

2.5

VIN=3.3V

VIN=3.5V

VIN=4.0V

VIN=5.0V

VIN=4.3V

VIN=4.5V

VIN=5.0V

VIN=6.0V

1.5

0.5

100

200

300

400

500

100

200

300

400

500

Output Current Iout[mA]

R11x2N501B

VIN=5.3V

VIN=5.5V

VIN=6.0V

VIN=7.0V

100

200

300

400

500

Output Current Iout[mA]

Rev. 1.10

- 10 -

2) Output Voltage vs. Input Voltage

R11x2N151B

1.600

R11x2N201B

2.100

2.000

1.900

1.800

1.700

1.600

1.500

1.400

1.300

1.200

1.100

1.000

Iout=1mA

Iout=30mA

Iout=50mA

Iout=1mA

Iout=30mA

Iout=50mA

Input Voltage V^IN[V]

R11x2N301B

R11x2N401B

3.100

3.000

2.900

2.800

2.700

2.600

2.500

4.500

4.000

3.500

3.000

2.500

Iout=1mA

Iout=30mA

Iout=50mA

Iout=1mA

Iout=30mA

Iout=50mA

Input Voltage V^IN[V]

R11x2N501B

5.500

5.000

4.500

4.000

3.500

3.000

2.500

Iout=1mA

Iout=30mA

Iout=50mA

Input Voltage V^IN[V]

Rev. 1.10

- 11 -

3) Dropout Voltage vs. Output Current

R11x2N151B

R11x2N201B

0.600

0.500

0.400

0.300

0.200

0.100

0.000

0.500

0.400

0.300

0.200

0.100

0.000

Topt=-40°C

Topt=25°C

Topt=85°C

Topt=-40°C

Topt=25°C

Topt=85°C

100

[mA]

150

100

150

Output Current I

OUT

Output Current I_OUT[mA]

R11x2N301B

R11x2N401B

0.600

0.500

0.400

0.300

0.200

0.100

0.000

0.500

0.400

0.300

0.200

0.100

0.000

Topt=-40°C

Topt=25°C

Topt=85°C

Topt=-40°C

Topt=25°C

Topt=85°C

100

150

100

150

Output Current I_OUT[mA]

R11x2N501B

0.600

0.500

0.400

0.300

0.200

0.100

0.000

Topt=-40°C

Topt=25°C

Topt=85°C

100

150

Output Current IOUT[mA]

Rev. 1.10

- 12 -

4) Output Voltage vs. Temperature

V^IN=3.0V C^IN=1mF

VIN=2.5V CIN=1mF

R11x2N151A/B

R11x2N201B

C^OUT=2.2mF I^OUT=30mA

COUT=2.2mFIOUT=30mA

1.53

2.10

2.08

2.06

2.04

2.02

2.00

1.98

1.96

1.94

1.92

1.90

1.52

1.51

1.50

1.49

1.48

1.47

-50

-25

(°C)

100

-50

-25

(°C)

100

Temperature Topt

V^IN=4.0V C^IN=1mF

V^IN=5.0V C^IN=1mF

R11x2N301A/B

R11x2N401A/B

C^OUT=2.2mF I^OUT=30mA

3.06

4.08

4.06

4.04

4.02

4.00

3.98

3.96

3.94

3.92

3.04

3.02

3.00

2.98

2.96

2.94

-50

-25

(°C)

100

-50

-25

(°C)

100

Temperature Topt

V^IN=6.0V C^IN=1mF

R11x2N501A/B

C^OUT=2.2mF I^OUT=30mA

5.10

5.08

5.06

5.04

5.02

5.00

4.98

4.96

4.94

4.92

4.90

-50

-25

100

Temperature Topt(°C)

Rev. 1.10

- 13 -

5) Supply Current vs. Input Voltage

R11x2N151B

R11x2N201B

120

100

120

100

Input Voltage VIN[V]

R11x2N301B

R11x2N401B

120

100

120

100

Input Voltage VIN[V]

R11x2N501B

120

100

Input Voltage VIN[V]

Rev. 1.10

- 14 -

6) Supply Current vs. Temperature

V^IN=2.5V C^IN=1mF

C^OUT=2.2mF

V^IN=3.0V C^IN=1mF

C^OUT=2.2mF

R11x2N151A/B

R11x2N201A/B

200

150

100

150

100

-50

-25

(°C)

100

-50

-25

(°C)

100

Temperature Topt

V^IN=4.0V C^IN=1mF

C^OUT=2.2mF

V^IN=5.0V C^IN=1mF

C^OUT=2.2mF

R11x2N301A/B

R11x2N401A/B

200

150

100

200

150

100

-50

-25

(°C)

100

-50

-25

(°C)

100

Temperature Topt

V^IN=6.0V C^IN=1mF

C^OUT=2.2mF

R11x2N501A/B

200

150

100

-50

-25

100

Temperature Topt(°C)

Rev. 1.10

- 15 -

7) Ripple Rejection vs. Frequency

V^IN=2.5V+0.5Vp-p

V^IN=3.0V+0.5Vp-p

R11x2N201A/B

R11x2N151A/B

C^OUT=2.2mF IOUT=30mA

90.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

0.1

100

0.1

100

Frequency Freq [kHz]

V^IN=4.0V+0.5Vp-p

V^IN=5.0V+0.5Vp-p

R11x2N401A/B

R11x2N301A/B_{COUT=2.2mF IOUT=30mA}

C^OUT=2.2mF IOUT=30mA

90.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

90.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

0.1

100

0.1

100

Frequency Freq [kHz]

V^IN=6.0V+0.5Vp-p

R11x2N501A/B

C^OUT=2.2mF IOUT=30mA

90.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

0.1

100

Frequency Freq [kHz]

Rev. 1.10

- 16 -

8) Ripple Rejection vs. Input Voltage (DC bias)

C^OUT=Ceramic 2.2mF

R11x2N301B

IOUT=1mA

IOUT=10mA

90.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

90.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

f=400Hz

f=1kHz

f=400Hz

f=1kHz

f=10kHz

3.10

3.20

3.30

Input Voltage V [V]

3.40

3.50

3.10

3.20

3.30

3.40

3.50

Input Voltage VIN[V]

C^OUT=Ceramic 2.2mF

R11x2N301B

IOUT=50mA

90.00

80.00

70.00

60.00

50.00

40.00

30.00

20.00

10.00

0.00

f=400Hz

f=1kHz

f=10kHz

3.10

3.20

3.30

3.40

3.50

Input Voltage VIN[V]

9) Input Transient Response

R11X2N151B

Topt=25°C

VIN

VIN=2.5V<-->3.5V

IOUT=30mA

CIN =none

VOUT

COUT=2.2mF

tr/tf=5ms

Rev. 1.10

- 17 -

R11X2N201B

Topt=25°C

VIN

VIN=3.0V<-->4.0V

IOUT=30mA

CIN =none

VOUT

COUT=2.2mF

tr/tf=5ms

R11X2N301B

Topt=25°C

VIN

VIN=4.0V<-->5.0V

IOUT=30mA

CIN =none

VOUT

COUT=2.2mF

tr/tf=5ms

R11X2N401B

Topt=25°C

VIN

VIN=5.0V<-->6.0V

IOUT=30mA

CIN =none

VOUT

COUT=2.2mF

tr/tf=5ms

Rev. 1.10

- 18 -

R11X2N501B

Topt=25°C

VIN

VIN=6.0V<-->7.0V

IOUT=30mA

CIN =none

COUT=2.2mF

tr/tf=5ms

VOUT

10)Load Transient Response

R11X2N151B

Topt=25°C

IOUT

IOUT=50mA<-->100mA

VIN=2.5V

VOUT

CIN=2.2mF

COUT=2.2mF

tr/tf=5ms

R11X2N201B

Topt=25°C

IOUT

IOUT=50mA<-->100mA

VIN=3.0V

VOUT

CIN=2.2mF

COUT=2.2mF

tr/tf=5ms

Rev. 1.10

- 19 -

R11X2N301B

Topt=25°C

IOUT

IOUT=50mA<-->100mA

VIN=4.0V

VOUT

CIN=2.2mF

COUT=2.2mF

tr/tf=5ms

R11X2N401B

Topt=25°C

IOUT

IOUT=50mA<-->100mA

VIN=5.0V

VOUT

CIN=2.2mF

COUT=2.2mF

tr/tf=5ms

R11X2N501B

Topt=25°C

IOUT

IOUT=50mA<-->100mA

VIN=6.0V

VOUT

CIN=2.2mF

COUT=2.2mF

tr/tf=5ms

Rev. 1.10

- 20 -

n TECHNICAL NOTES

When using these ICs, consider the following points:

In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be

sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the

range described as follows:

Spectrum

Analyzer

VOUT

Ceramic

Cap.

R1112NXX1B

S.A.

ESR

VIN

GND

Ceramic

Cap.

VIN

IOUT

Measuring Circuit for white noise; R1112NXX1B

The relations between I^OUT(Output Current) and ESR of Output Capacitor are shown below. The conditions when the white

noise level is under 40mV(Avg.) are marked as the hatched area in the graph.

(note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation,

the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the

PCB.)

(1) VIN=VOUT+1V

(2) Frequency band :10Hz to 1MHz

(3) Temperature : 25°C

R11X2N151B

OUT

=2.2uF,C =2.2uF

COUT=4.7uF,CIN=2.2uF

100

0.1

0.01

0.1

0.01

120

150

120

150

I^OUT[mA]

IOUT[mA]

Rev. 1.10

- 21 -

R11X2N301B

C_OUT=2.2uF,C_IN=2.2uF

C_OUT=4.7uF,C_IN=2.2uF

100

0.1

0.01

0.1

0.01

120

150

120

150

IOUT[mA]

I^OUT[mA]

Make V^DDand GND line sufficient. When the impedance of these is high, the noise might be picked up or not work

correctly.

Connect the capacitor with a capacitance of 2.2mF or more between V^DDand GND as close as possible.

Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.

Rev. 1.10

- 22 -

R1112N241A [RICOH]

相关型号：

SI9130DB

SI9135LG-T1

SI9135LG-T1-E3

SI9135_11

SI9136_11

SI9130CG-T1-E3

SI9130LG-T1-E3

SI9130_11

SI9137

SI9137DB

SI9137LG

SI9122E