ILC6381AP-50 데이터 시트보기 (PDF) - Impala Linear Corporation

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ILC6381AP-50

SOT-89 Step-up Dual-Mode Switcher with Shutdown

Impala Linear Corporation 

SOT-89 Step-up Dual-Mode Switcher with Shutdown

Absolute Maximum Ratings (TA = 25°C)

Parameter

VOUT Input Voltage

Voltage on pin LX

Current on pin LX

Voltage on pin EXT

Current on pin EXT

CE Input Voltage

Continuous Total Power Dissipation

Operating Ambient Temperature

Storage Temperature

Symbol

VOUT

VLX

ILX

VEXT

IEXT

VCE

PD

TOPR

TSTG

Ratings

12

12

400

VSS-0.3~VOUT+0.3

±50

12

500

-30~+80

-40~+125

Units

V

V

mA

V

mA

V

mW

°C

°C

Stresses above those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent device failure. Functionality at

or above these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliabil-

ity. Operating ranges define those limits between which the functionality of the device is guaranteed.

Electrical Characteristics

VOUT = 5.0V, FOSC = 100kHz TA - 25°C. Unless otherwise specified, VIN = VOUT x 0.6, IOUT = 50mA. See schematic, figure 3

Parameter

Symbol

Conditions

Min Typ Max Units

Output Voltage

Input Voltage

Oscillation Startup

Voltage

VOUT

VIN

VST

LX = 10kΩ pull-up to 5V, VOUT = VST

4.875 5.000 5.125 V

10

V

0.8

V

Operation Startup

Voltage

VST1

IOUT = 1mA

0.9

V

No-Load Input Current

Supply Current 1

(See Note 2)

Supply Current 2

LX Switch-On

Resistance

IIN

IDD 1

IDD 2

RSWON

IOUT = 0mA (See Note 1)

LX = 10kΩ pull-up to 5V, VOUT = 4.5V

LX = 10kΩ pull-up to 5V, VOUT = 5.5V

LX = 10kΩ pull-up to 5V, VOUT = 4.5V

23.0 46.0 µA

78.6 131.1 µA

6.9 13.8 µA

1.3 2.3

Ω

LX Leakage Current

Oscillator Freq.

Maximum Duty Ration

PFM Duty Ration

Stand-by Current

CE “High” Voltage

CE “Low” Voltage

CE “High” Current

CE “Low” Current

LX Limit Voltage

Efficiency

ILXL

FOSC

MAXDTY

PFMDTY

ISTB

VCEH

VCEL

ICEH

ICEL

VLXLMT

EFFI

No external components, VOUT = VLX = 10V

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

Measuring of LX waveform

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

Measuring of LX on-time

VIN = 4.75V, Measuring of LX on-time

LX = 10kΩ pull-up to 5V, VOUT =4.5V

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

Existence of LX Oscillation

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

Stopped LX Oscillation

LX = 10kΩ pull-up to 5V, VOUT = VCE = 4.5V

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

VCE = 0V

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

FOSC > FOSC x 2 (See Note 2)

85

80

5

0.75

0.7

1.0 µA

100 115 kHz

87

92

%

10

20

%

0.5 µA

V

0.20 V

0.25 µA

-0.25 µA

1.1

V

85

%

Slow Start Time

TSS

10

msec

Notes:

1. The Schottky diode (S.D.), in figure 3 must be type MA735, with Reverse current (IR) < 1.0µA at reverse voltage (VR)=10.0V

2. “Supply Current 1” is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator

periodically operates which results in less average power consumption.

The current that is actually provided by external VIN source is represented by “No-Load Input Current(IIN)”

3. Switching frequency is determined by delay time of internal comparator to turn Lx “off”, and minimum “on” time as determined

by MAXDTY spec.

Impala Linear Corporation

ILC6380/1 1.4

(408) 574-3939 www.impalalinear.com

Sept 1999 2

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