L3383-31-AB3-R Просмотр технического описания (PDF) - Unisonic Technologies

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L3383-31-AB3-R

PFM CONTROLLED, STEP-UP DC/DC CONVERTERS (VARIABLE DUTY RATIO)

Unisonic Technologies 

L3383

CMOS IC

ELECTRICAL CHARACTRISTICS(Cont.)

UTC L3383-5.0V (IOUT=50mA)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

Output Voltage

VOUT L, SD, CL etc. connected

4.875 5.000 5.125 V

Maximum Input Voltage

VIN

10 V

Oscillation Start-up Voltage

VST IOUT=1mA

0.80 0.90 V

Oscillation Hold Voltage

VHLD IOUT=1mA

0.70

V

Lx Limit Voltage

VLxLMT Same as IDD1. Fosc>Fosc1×2

0.7

1.1 V

No-Load Input Current

IIN IOUT=0mA (Note 1)

5.3 10.6 µA

Supply Current 1(Note 2)

Supply Current 2

IDD1 VIN=VOUT×0.95

IDD2 VIN=VOUT+0.5V

31.7 63.4 µA

2.4 4.8 µA

Lx Leakage Current

ILXL No external components, VOUT=VLx=10V.

1.0 µA

Lx Switch-On Resistance

RSWON Same as IDD1. VLx=0.4V

2.8 4.3 Ω

Duty Ratio 1

DTY1 Same as IDD1. Measuring of Lx waveform 70 75 80 %

Duty Ratio 2

DTY2 IOUT=1mA. Measuring of Lx on-time

40 45 50 %

Efficiency

EFFI L, SD, CL etc. connected

85

%

Maximum Oscillation Frequency Fosc1 Same as IDD1. 75% duty

Fosc2 Same as IDD1. 45% duty

150 180 210 kHz

100 120 130 kHz

For 5-Pins package Only

CE Voltage

High

Low

VCEH

VCEL

Same as IDD1.

Existence of Lx Oscillation.

Same as IDD1.

Disappearance of Lx Oscillation

0.75

V

0.20 V

CE ”High” Current

High

Low

ICEH Same as IDD1. VCE=VOUT×0.95

ICEL Same as IDD1. VCE=0V

0.25 µA

-0.25 µA

Stand-by Current

ISTB Same as IDD1.

0.5 µA

Note: 1. The Schottky diode (SD) must be type MA735, with reverse current(IR)<1.0µA at reverse voltage (VR) =10V.

2. "Supply Current 1" is the supply current while the oscillator is continuously oscillating. The current actually

provided by an external VIN source is represented by "No-Load Input Current (IIN)".

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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QW-R502-032,E

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