JRC NJM2370R, NJM2370U Datasheet

NJM2370

LOW DROPOUT VOLTAGE REGULATOR WITH ON/OFF CONTROL

■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE
The NJM2370 is a low dropout voltage regulator with
ON/OFF control.

It features dropout voltage of 0.1V at Io=30mA, low
output noise and high ripple rejection by connecting an
external capaciter to noise bypass terminal.

It’s suitable for portable items such as cellular phones,
video camera and others.

■ FEATURES

● Output Current (150mA min. (Vo-0.3V))

● Low Dropout Volt age (0.1V typ. (Io=30mA))

● External Capaciter for Noise Bypass

● ON/OFF Control Function

● Over Current Limit

● Thermal Shutdown

● Bipolar Technology

● Package Outline SOT-89(5pin), VSP8

■ PIN CONFIGURATION

NJM2370U NJM2370R

5 4

1 2 3

PIN FUNCTION

CONTROL

1.

GND

2.

NOISE BYPASS

3.

V

OUT

VIN

4.

5.

1
2
3
4

NJM2370U NJM2370R

■ EQUIVALENT CIRCUIT

VIN

CONT

Bandgap
Reference

Thermal
Protection

PIN FUNCTION

8

1. CONTROL

2. GND

7

3. NC

4. NOISE BYPASS

6

5. V

OUT

6. NC

5

7. NC

8. V

IN

V

OUT

NOISE
BYPASS

GND

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NJM2370

■ ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT

Input Voltage VIN 20 V
Control Vo lt age V

Power Dissipation PD
Operating Temperature Range

Storage Temperature Range

(note 1)When input voltage is less than +20V, the absolute maximum
control voltage is equal to the input vo lt age.

■ ELECTRICAL CHARACTERISTICS (Ta=25°C)

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT
Output Voltage Vo
Quiescent Current 1 IQ1 Io=0mA,expect I
Quiescent Current 2 IQ2
Output Current Io
Line Regulation

Load Regulation
Dropout Voltage
Ripple Rejection

Average Temperature

∆Vo/∆V

∆Vo/∆Io Io=0 ∼ 60mA
∆V

I-O

R • R

∆Vo/∆Ta Ta=−20 ∼ 75°C, Io=10mA
Coefficient of Output
Voltage

Output Noise Voltage VNO 10Hz< f < 80kHz, Io=10mA, Vo=3V

(note 2)Please confirm the specification separately because some parameters depend on output voltage.

■ TEST CIRCUIT

20(note 1) V

CONT

Topr
Tstg

(SOT-89)
(VSP8)

−40 ∼ +85 °C

−40 ∼ +125 °C

V

=Vo+ 1V, Io=30mA

IN

350
320

CONT

CONTROL−GND short
(Vo−0.3V)
VIN=(Vo+1V) ∼ (Vo+6V)

IN

Vo=2V to 14V
V

=(Vo+1V) ∼ (Vo+5V)

IN

Vo=15V

Io=30mA
f=400Hz, ein=100mVp-p

=Vo+ 1. 5V, Io=10mA

V

IN

=Vo+1.5V

V

IN

mW

−3%

−

−

180

− −

150 180

− −

− −

− −

−

−

−

−

0.1 0.3 V
60

0. 2

30

+3% V

−

µA

100 nA

−

mA

0.12 %/V

0.12 %/V

0.03 %/mA

−

−

−

dB

mV/°C

µVrms

V

IIN

A

+

IN

V

V

A

CONT

0.1µF

I

CONT

VIN V

ＮＪＭ2370

CONTROL

NOISE
BYPASS

GND

OUT

+

I

10µF

V

OUT

V

OUT

Cp

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R

NJM2370

■ TYPICAL APPLICATION
In Nonuse of ON/OFF Control

①

V

IN

+

0.1µF

(0～300kΩ)

Connect control terminal(1Pin) to V

terminal(5Pin)

IN

When a resistance “R” is connected, the quiescent current decreases, but minimum operating voltage

increases. Please refer to a figure of Output V olt age vs. Control Voltage.

In Use of ON/OFF CONTROL

②

VIN V

OUT

ＮＪＭ2370

CONTROL

NOISE
BYPASS

GND

+

10µF

Cp=0.1µF

V

OUT

V

IN

+

0.1µF

VIN V

ＮＪＭ2370

OUT

+

10µF

V

OUT

R

GND

NOISE
BYPASS

Cp=0.1µF

CONTROL

When the control terminal is “H”, it is ON.
When the control terminal is “L” or “open”, it is OFF.

✱Noise bypass Capacitance Cp

Noise bypass capacitance CP reduces noise generated by band-gap reference circuit.
Noise level and ripple rejection will be improved when larger CP is used. Please refer to the typical

characteristics to determine the value.

Use of smaller CP value may induce oscillation.
Please make sure to use CP value of greater than 0.1uF to avoid the problem.

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