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NJU7600

PWM control Step-Up / Flyback switching regulator IC

Japan Radio Corporation  

NJU7600

■ABSOLUTE MAXIMUM RATINGS (Ta=25°C)

PARAMETER

Supply Voltage

Output Pin Current

Power Dissipation

SYMBOL

V+

IO

PD

Operating Temperature Range

TOPR

Storage Temperature Range

TSTG

MAXIMUM RATINGS

+9

±50

DMP8 :300

TVSP8 :320

-40 ~ +85

-40 ~ +125

UNIT

V

mA

mW

°C

°C

■RECOMMENDED OPERATING CONDITIONS (Ta=25°C)

PARAMETER

Operating Voltage

Oscillator Timing Resistor

Oscillation Frequency

SYMBOL

V+

RT

fOSC

MIN.

2.2

30

300

TYP.

–

47

700

MAX.

8

120

1,000

UNIT

V

kΩ

kHz

■ELECTRICAL CHARACTERISTICS (V+=3.3V, RT=47kΩ, Ta=25°C)

PARAMETER

SYMBOL

TEST CONDITION

Under Voltage Lockout Block

ON Threshold Voltage

OFF Threshold Voltage

Hysteresis Voltage

Soft Start Block

Soft Start Time

Short Circuit Protection Block

Input Threshold Voltage

Charge Current

Latch Mode

ON Threshold Voltage

Latch Mode

OFF Threshold Voltage

Oscillator Block

RT Pin Voltage

Oscillation Frequency

Oscillate Supply Voltage

Fluctuations

Oscillate Temperature

Fluctuations

VT_ON

VT_OFF

VHYS

V+= L → H

V+= H → L

TSS

VT_ON → Duty=80%

VT_PC

ICHG

VT_LA

FB Pin

VSCP=0V

SCP Pin

VT_LAOFF SCP Pin

VRT

fOSC

fDV

V+=2.2V ~ 8V

fDT

Ta=-40°C ~ +85°C

MIN. TYP. MAX. UNIT

1.9

2.0

2.1

V

1.8

1.9

2.0

V

60

100

–

mV

8

16

24

ms

0.95

1.00

1.05

V

1.5

2

2.5

µA

0.95

1.00

1.05

V

0.2

0.45

0.7

V

-5%

0.5

+5%

V

630

700

770 kHz

–

1

–

%

–

3

–

%

Ver.2005-03-01

-3-

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