NJU7261U45 NJR, NJU7261U45 Datasheet

NJU7261U45

Manufacturer Part Number

NJU7261U45

Description

IC SW-REG STEP-UP 4.5V SOT89-5

Manufacturer

NJR

Type

Step-Up (Boost)r

Datasheet

1.NJU7261U30-TE1.pdf (8 pages)

Specifications of NJU7261U45

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

4.5V

Current - Output

250mA

Frequency - Switching

30kHz

Voltage - Input

1 ~ 10 V

Operating Temperature

-25°C ~ 75°C

Mounting Type

Surface Mount

Package / Case

SOT-89-5

Power - Output

300mW

Mounting Style

SMD/SMT

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Current page: 1 of 8
Download datasheet (160Kb)

■ GENERAL DESCRIPTION

which contains accurate voltage reference, error amplifier, CR

oscillator, control circuit, switching transistor, diode and resistor.

line-up of different output voltages version are available.

items because of its small packaged outline, low operating voltage

and current.

■ FEATURES

■ LINE-UP

■ TERMINAL DESCRIPTION

Ver.2010-04-14

The NJU7261 series is a C-MOS step-up switching regulator

The regulation voltage is fixed by internal circuits and the following

• Low Operating Voltage

• Low Operating Current

• Low Stand-by Current

• High Precision Output Voltage (±3% max.)

• Wide Operating Voltage Range

• Stand-by Function

• CR Oscillator On-chip

• Diode On-chip

• Package Outline

• C-MOS Technology

The stand-by function is effective for low power consumption.

This series is suitable for portable equipment's or battery operated

Output Voltage (V)

No.

3.0

3.3

5.0

Term. Name

CONT

GND

STB

OUT

C-MOS STEP-UP SWITCHING REGULATOR

NJU7261U1-30

NJU7261U1-33

NJU7261U1-50

Line-Up

POWER

(1.0V min.)

(5.0µA typ. / V

(0.2µA max. / V

SOT89-5

I/O

External Inductor Connect Terminal

Power Source (GND)

Strobe Terminal : "H" or OPEN···Normal Operation (step-up)

Power Source (+)

Step-up Output Terminal

OUT

= 3.0V)

" L"

■ PACKAGE OUTLINE

■ PIN CONFIGULATION

■ EQUIVALENT CIRCUIT

FUNCTION

···Standp-By Operation

NJU7261U1 - **

- 1 -

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NJU7261U45 Summary of contents

Page 1

C-MOS STEP-UP SWITCHING REGULATOR ■ GENERAL DESCRIPTION The NJU7261 series is a C-MOS step-up switching regulator which contains accurate voltage reference, error amplifier, CR oscillator, control circuit, switching transistor, diode and resistor. The stand-by function is effective for low power ...

Page 2

ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage CONT Input Voltage Strobe Input Voltage Output Voltage Power Dissipation Operating Temperature Range Storage Temperature Range Note1) When a coil used. This enough to test. Note2) The CONT input voltage ...

Page 3

Version PARAMETER SYMBOL Input Voltage V Start Voltage V START Oscillator Freq. f OSC Output Voltage V OUT Input Stability ∆V OUT1 Load Stability ∆V OUT2 Operating Current I SS Stand-by Current I Q Switching Current ...

Page 4

Version PARAMETER SYMBOL Input Voltage V IN Start Voltage V START Oscillator Freq. f OSC Output Voltage V OUT Input Stability ∆V OUT1 Load Stability ∆V OUT2 Operating Current I SS Stand-by Current I Q Switching Current I SI ...

Page 5

MEASUREMENT CIRCUIT 1 (1) (2) (3) Ver.2010-04-14 External Diode Type : "D1NS4" provided by SHINDENGEN ( Under the condition 0.55V) ...

Page 6

MEASUREMENT CIRCUIT 2 (4) (5) ( Ver.2010-04-14 ...

Page 7

APPLICATION CIRCUIT Ver.2010-04- ...

Page 8

TYPICAL CHARACTERISTIC Start Voltage vs. Temperature Internal Oscillator Operation : External D1NS4 Oscillation Frequency vs. Temperature - 8 - Start Voltage vs. Temperature Internal Oscillator Operation : External D1NS4 Oscillation Frequency vs. Temperature [CAUTION] The specifications on this databook ...

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