R1210N311D-TL [RICOH]

Switching Regulator, Voltage-mode, 120kHz Switching Freq-Max, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN;


型号：	R1210N311D-TL
厂家：	RICOH ELECTRONICS DEVICES DIVISION
描述：	Switching Regulator, Voltage-mode, 120kHz Switching Freq-Max, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN 开关光电二极管
文件：	总18页 (文件大小：174K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PWM Step-up DC/DC Converter

R1210N××1× Series

APPLICATION MANUAL

NO. EA-075-0012

PWM Step-up DC/DC Converter

R1210N××1× Series

OUTLINE

The R1210N××1× Series are PWM step-up DC/DC Converter, with high accuracy, low supply current by CMOS

process.

Each of the R1210N××1× Series consists of an oscillator, a PWM circuit, a reference voltage unit, an error amplifier,

phase compensation circuit, resistors for voltage detection, a chip enable circuit. Further, includes a controller against

drastic load transient, a control transistor with low ON-Resistance, ‘L^Xswitch’, and a protection circuit for L^Xswitch

and an output voltage detector. R1210N××1A Series contain further a circuit for changeover oscillator frequency each.

A low ripple, high efficiency step-up DC/DC converter can be composed of this IC with only three external compo-

nents, or an inductor, a diode and a capacitor.

The R1210N Series can detect drastic change of output voltage with a circuit controller. The load transient re-

sponse is improved compared with current model, furthermore the R1210N××1A Series have another function, that is,

when the load current is small, oscillator frequency is decreased by a circuit for switching oscillator frequency from

TYP. 100kHz to 35kHz, therefore, supply current is reduced.

The built-in chip enable circuit can make the standby mode with ultra low quiescent current.

Since the package for these ICs is small SOT-23-5, high density mounting of the ICs on board is possible.

FEATURES

• External Components ................................................................. Only an inductor, a diode, and a capacitor

• Standby Current ......................................................................... TYP. 0µA

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

• Output Voltage............................................................................. Stepwise Setting with a step of 0.1V in the range of

2.2V to 6.0V (××1C/D)

2.2V to 3.5V (××1A)

• Two choices of Basic Oscillator Frequency................................ 100kHz (××1A/C), 180kHz (××1D)

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

• High Efficiency ............................................................................ TYP. 88%

(V^IN=Set Output Voltage×0.6 [V], I^OUT=10mA)

• Low Ripple, Low Noise

• Built-in a driver transistor with low on-resistance

• Start-up Voltage........................................................................... MAX. 0.9V

• Basic Frequency change-over circuit (only for ××1A type)....... from TYP. 100kHz to 35kHz

R1210N××1×

APPLICATIONS

• Power source for battery-powered equipment.

• Power source for portable communication appliances, cameras, VCRs

• Power source for appliances of which require higher voltage than battery voltage.

BLOCK DIAGRAM

Vref Circuit

Phase Comp.

VOUT

VLX limiter

Buffer

PWM Controller

OSC

fosc Control

Chip Enable

GND

SELECTION GUIDE

In the R1210N Series, the output voltage, the oscillator frequency, the optional function, 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 ;

R1210N××1×-××

↑ ↑ ↑

b c

Code

Contents

Setting Output Voltage (V^OUT) :

Stepwise setting with a step of 0.1V in the range of 2.2V to 6.0V (for ××1C/D version) or

2.2V to 3.5V (for ××1A version) is possible.

Designation of Oscillator Frequency

A : 100kHz with a Frequency Change-over circuit

C : 100kHz without a Frequency Change-over circuit

D : 180kHz without a Frequency Change-over circuit

Designation of Taping Type; Ex. :TR, TL (refer to Taping Specification)

“TR” is prescribed as a standard.

R1210N××1×

PIN CONFIGURATION

SOT-23-5

GND

(mark side)

OUT

PIN DESCRIPTION

Pin No.

Symbol

Description

Chip Enable Pin

V^OUT

Pin for Monitoring Output Voltage

No Connection

GND

L^X

Ground Pin

Switching Pin (Nch Open Drain)

ABSOLUTE MAXIMUM RATINGS

Symbol

V^OUT

V^LX

Item

V^OUTPin Output Voltage

L^XPin Output Voltage

CE Pin Input Voltage

L^XPin Output Current

Power Dissipation

Rating

9.0

Unit

9.0

V^CE

9.0

I^LX

400

°C

P^D

250

Topt

Tstg

Operating Temperature Range

Storage Temperature Range

-40∼+85

-55∼+125

R1210N××1×

ELECTRICAL CHARACTERISTICS

• R1210N××1×

(Topt=25°C)

Symbol

V^OUT

Item

Output Voltage

Conditions

MIN.

TYP.

MAX.

×1.025

Unit

V^IN=V^SET×0.6, I^OUT=1mA

×0.975

V^IN

Maximum Input Voltage

∆V^OUT/

∆Topt

Step-up Output Voltage

Temperature Coefficient

-40°C≤ Topt ≤ 85°C

±100

ppm/°C

V^IN=0V→2V

Vstart

Start-up Voltage

0.9

V^OUT:1.8kΩ pull-down

∆Vstart/

∆Topt

Start-up Voltage

-40°C≤ Topt ≤ 85°C

-3.2

mV/°C

Temperature Coefficient

0.7

0.9

(××1A/C)

Vhold

Hold-on Voltage

V^IN=2V→0V, I^OUT=1mA

V (××1D)

µA

(××1A/C)

2.2V≤V^SET≤2.5V

V^OUT=V^SET×0.96

µA

(××1D)

µA

(××1A/C)

2.6V≤V^SET≤3.0V

V^OUT=V^SET×0.96

µA

(××1D)

µA

(××1A/C)

3.1V≤V^SET≤3.5V

V^OUT=V^SET×0.96

I^DD1

Supply Current1

µA

100

(××1D)

µA

(××1C)

3.6V≤V^SET≤4.0V

V^OUT=V^SET×0.96

µA

110

(××1D)

µA

(××1C)

4.1V≤V^SET≤4.5V

V^OUT=V^SET×0.96

µA

120

(××1D)

R1210N××1×

Symbol

Item

Conditions

MIN.

TYP.

MAX.

Unit

µA

100

130

110

150

120

170

(××1C)

4.6V≤V^SET≤5.0V

V^OUT=V^SET×0.96

µA

100

(××1D)

µA

(××1C)

5.1V≤V^SET≤5.5V

V^OUT=V^SET×0.96

I^DD1

Supply Current1

µA

110

(××1D)

µA

(××1C)

5.6V≤V^SET≤6.0V

V^OUT=V^SET×0.96

µA

130

(××1D)

µA

(××1A/C)

I^DD2

Supply Current2

V^OUT=V^CE=V^SET+0.5V

µA

(××1D)

Istandby

I^LXleak

Standby Current

V^OUT=6V, V^CE=0V

V^OUT=V^LX=8V

0.5

µA

L^XLeakage Current

KHz

100

180

0.5

0.6

120

216

(××1A/C)

Maximum Oscillator

Frequency

fosc

V^OUT=V^CE=V^SET×0.96

-40°C≤ Topt ≤ 85°C

KHz

144

(××1D)

kHz/°C

(××1A/C)

∆fosc/

∆Topt

Oscillator Frequency

Temperature Coefficient

kHz/°C

(××1D)

Oscillator Maximum Duty

Cycle

V^OUT=V^CE=V^SET×0.96,

Maxdty

V^LXlim

(V^LX“L” Side)

V^OUT=V^CE=V^SET×0.96,

V^LXLimit Voltage

0.4

0.9

0.6

0.8

(V^LX“L” Side)

V^CEH

V^CEL

I^CEH

I^CEL

CE “H” Input Voltage

CE “L” Input Voltage

CE “H” Input Current

CE “L” Input Current

V^OUT=V^SET×0.96

V^OUT=V^CE=6.5V

V^IN=6.5V, V^CE=0V

0.3

0.1

-0.1

µA

R1210N××1×

Symbol

Item

Conditions

2.2V≤V^SET≤2.4V

MIN.

TYP.

MAX.

Unit

V^LX=0.4V

2.5V≤V^SET≤2.9V

KHz

V^LX=0.4V

3.0V≤V^SET≤3.4V

100

120

140

150

170

190

V^LX=0.4V

3.5V≤V^SET≤3.9V

V^LX=0.4V

I^LX

L^XSwitching Current

4.0V≤V^SET≤4.4V

V^LX=0.4V

4.5V≤V^SET≤4.9V

V^LX=0.4V

5.0V≤V^SET≤5.4V

V^LX=0.4V

5.5V≤V^SET≤6.0V

V^LX=0.4V

V^IN=V^SET×0.6, I^OUT=0.5mA

(only for ××1A)

fosc2

Change-over frequency

*Note: VSET means setting Output Voltage.

R1210N××1×

TEST CIRCUITS

OUT

GND CE

VIN

GND CE

OSCILLOSCOPE

OUT

GND CE

OSCILLOSCOPE

VOUT

OUT

GND CE

OSCILLOSCOPE

VOUT

GND CE

L: 100µH CD54 (Sumida Electric Co, LTD)

SD: MA721 (Matsushita Electronics Corporation, Schottky Type)

CL: 22µF×2 (Tantalum Type)

R1210N××1×

TYPICAL CHARACTERISTICS

1) Output Voltage vs. Output Current

R1210N301C

R1210N301D

3.2

3.1

3.0

3.2

IN:0.9V

3.1

3.0

VIN:2.0V

IN:1.5V

VIN:2.5V

2.9

2.8

2.9

2.8

100

150

200

250

300

100

150

200

250

300

Output Current IOUT (mA)

R1210N501C

R1210N501D

5.4

5.2

5.0

4.8

5.4

5.2

5.0

4.8

VIN:3.0V

VIN:4.0V

VIN:3.0V

IN:2.0V

VIN:4.0V

VIN:2.0V

VIN:1.5V

IN:1.5V

4.6

4.4

4.6

4.4

100

150

200

250

300

100

150

200

250

300

Output Current IOUT (mA)

2) Efficiency vs. Output Current

R1210N301C

R1210N301D

100

VIN:2.5V

VIN:2.0V

VIN:1.5V

VIN:0.9V

100

150

200

250

300

100

150

200

250

300

Output Current I^OUT(mA)

Output Current IOUT (mA)

R1210N××1×

R1210N501C

R1210N501D

100

VIN:4.0V

VIN:3.0V

VIN:1.5V

VIN:2.0V

VIN:1.5V

100

150

200

250

300

100

150

200

250

300

Output Current IOUT (mA)

3) R1210N××1A/C Efficiency

R1210N301×

IN:1.5V

100

R1210N301A

R1210N301C

0.01

0.10

1.00

10.00

100.00

Output Current IOUT(mA)

4) Ripple Voltage vs. Output Current

R1210N301C

R1210N301D

ESR:0.33 Ω

140

120

100

140

120

100

IN:2.0(V)

IN:1.5(V)

VIN:1.5(V)

VIN:2.0(V)

IN:0.9(V)

VIN:0.9(V)

100

150

100

150

Output Current IOUT (mA)

Output Current I^OUT(mA)

R1210N××1×

R1210N501C

R1210N501D

ESR:0.33 Ω

140

120

100

140

120

100

IN:1.5(V)

IN:2.0(V)

VIN:2.0(V)

IN:0.9(V)

100

150

200

250

300

100

150

200

250

300

Output Current IOUT (mA)

5) Start-up Voltage/Hold-on Voltage vs. Output Current (Topt=25°C)

R1210N301C

R1210N301D

2.0

1.6

1.2

0.8

2.0

1.6

1.2

0.8

Vstart

Vhold

0.4

0.0

0.4

0.0

Output Current IOUT (mA)

R1210N501C

R1210N501D

2.0

1.6

1.2

0.8

2.0

1.6

1.2

0.8

Vstart

Vhold

0.4

0.0

0.4

0.0

Output Current IOUT (mA)

R1210N××1×

6) Output Voltage vs. Temperature

R1210N301C

R1210N301D

3.10

3.05

3.00

3.05

OUT:10(mA)

OUT:30(mA)

OUT:10(mA)

OUT:30(mA)

3.00

OUT:0(mA)

2.95

2.90

2.95

2.90

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N501C

R1210N501D

5.15

5.10

5.15

5.10

5.05

5.00

5.05

5.00

IOUT:10(mA)

IOUT:0(mA)

IOUT:10(mA)

IOUT:0(mA)

IOUT:30(mA)

4.95

4.90

4.85

4.90

4.85

-50

-25

100

-50

-25

100

Temperature Topt (°C)

7) Supply Current 1 vs. Temperature

R1210N301A

R1210N301D

100

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N××1×

R1210N501C

R1210N501D

120

100

120

100

-50

-25

100

-50

-25

100

Temperature Topt (°C)

8) Supply Current2 vs. Temperature

R1210N301A

R1210N221D

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N501C

R1210N601D

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N××1×

9) Standby Current vs. Temperature

R1210N221A

R1210N221D

1.0

0.8

1.0

0.8

0.6

0.4

0.6

0.4

0.2

0.0

-0.2

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N601C

R1210N601D

1.0

0.8

0.6

0.4

0.6

0.4

0.2

0.0

-0.2

-50

-25

100

-50

-25

100

Temperature Topt (°C)

10) Oscillator Frequency vs. Temperature

R1210N221A

R1210N221D

300

250

300

250

200

150

200

150

100

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N××1×

R1210N601C

R1210N601D

300

250

300

250

200

150

200

150

100

-50

-25

100

-25

100

Temperature Topt (°C)

11) Maximum Duty Cycle vs. Temperature

R1210N221A

R1210N221D

100

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N601C

R1210N601D

100

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N××1×

12) LX Switching Current vs. Temperature

R1210N301A

R1210N501C

500

400

300

200

400

300

200

100

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N221D

R1210N601D

500

400

300

200

400

300

200

100

-50

-25

100

-50

-25

100

Temperature Topt (°C)

13) LX leakage Current vs. Temperature

R1210N221A

R1210N221D

1.0

0.8

0.6

0.4

0.6

0.4

0.2

0.0

-0.2

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N××1×

R1210N601C

R1210N601D

1.0

0.8

1.0

0.8

0.6

0.4

0.6

0.4

0.2

0.0

0.2

0.0

-0.2

-50

-0.2

-25

100

-50

-25

100

Temperature Topt (°C)

14) VLX Voltage Limit vs. Temperature

R1210N301A

R1210N221D

1.0

0.8

0.6

0.4

0.8

0.6

0.4

0.2

0.0

0.2

0.0

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N501C

R1210N601D

1.0

0.8

0.6

0.4

0.8

0.6

0.4

0.2

0.0

0.2

0.0

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N××1×

15) CE “H” Input Voltage vs. Temperature

R1210N221A

R1210N601C

0.9

0.8

0.7

0.6

0.7

0.6

0.5

0.4

0.3

0.4

0.3

-50

-25

100

-50

-25

100

Temperature Topt (°C)

16) CE “L” Input Voltage vs. Temperature

R1210N221A

R1210N601C

0.9

0.8

0.7

0.6

0.7

0.6

0.5

0.4

0.3

0.4

0.3

-50

-25

100

-50

-25

100

Temperature Topt (°C)

R1210N311D-TL [RICOH]

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