CAT37TDI-TE7 データシートの表示（PDF） - Catalyst Semiconductor => Onsemi

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CAT37TDI-TE7

CMOS White LED Driver Boost Converter

Catalyst Semiconductor => Onsemi 

CAT37

ABSOLUTE MAXIMUM RATINGS

VIN , FB, SHDN Voltage ......................................... 8 V

SW Voltage .......................................................... 20 V

Junction Temperature ....................................... 125°C

Storage Temperature .......................... -65°C to 160°C

ESD Rating - Human Body Model .................... 2000V

Lead Soldering Temperature ............................ 300°C

RECOMMENDED OPERATING CONDITIONS

Parameter

Range

Unit

VIN

2.5 to 7

V

Ambient Temperature Range

-40 to +85

°C

Inductor L1

6.8 ±20% typical

µH

Input Capacitor C1

1.0 ±20% typical

µF

Output Capacitor C2

1.0 ±20% typical

µF

ILED with 1 to 4 LEDs in series

0 to 20

mA

ELECTRICAL SPECIFICATIONS

Over recommended operating conditions unless otherwise specified. TA = 25˚C, VIN = 3V and VSHDN = 3V.

Symbol Parameter

Conditions

Min

Typ

Max

Units

Input Voltage Range

2.5

7

V

IQ

Quiescent Current

ISD

Shutdown Current

VFB

FB Pin Voltage

IFB

FB Pin Leakage Current

Shutdown High Threshold

VFB = 0.2 V

0.5

0.7

mA

VSHDN = 0 V

0.05

1

µA

4 LEDs at 15 mA

85

95

105

mV

1

2

µA

0.85

V

Shutdown Low Threshold

0.25

V

ISHDN

fSW

DC

Shutdown Pin Current

Boost Converter Frequency

Maximum Switch

Duty Cycle

1

0.8

1.2

1.6

90

95

nA

MHz

%

ISWL

Switch Current Limit

400

550

780

mA

Switch Saturation Voltage

ISW = 300 mA

150

200

mV

Switch Leakage Current

Switch Off, VSW = 5 V

0.01

5

µA

Efficiency

Figure 1 with

83

%

specified components

© 2005 by Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

3

Doc No. 5005, Rev. S

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