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DO1608-103 Datasheet(PDF) 2 Page - Diodes Incorporated |
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DO1608-103 Datasheet(HTML) 2 Page - Diodes Incorporated |
2 / 12 page ABSOLUTE MAXIMUM RATINGS (Voltages to GND unless otherwise stated) Input voltage (VIN)7V LX output voltage (VLX) 30V Switch output current (ILX) 500mA Power dissipation (PD) 300mW Operating temperature (TOP) -40 to 85°C Storage temperature (TST) -55 to 150°C Junction temperature (Tj MAX) 125°C ZXLD1601 SEMICO NDUC TORS ISSUE 3 - AUGUST 2004 2 Symbol Parameter Conditions Min Typ Max Units VIN Input voltage 2.5 5.5 V IIN Supply current Quiescent Shutdown VEN =VIN,ILX = 0, Output not switching VEN =0V 60 <10 100 100 µA nA VFB FB pin control voltage 0.98 1.07 V R1 Internal resistor from FB pin to GND pin 135 k R2 Internal resistor from FB pin to VSENSE pin 3.45 M fLX Operating frequency L=10 H, VOUT =28V, 5mA load 600 kHz TOFF LX output ‘OFF’ time 350 500 ns TON (2) LX output ‘ON’ time 5µs ILXpk Switch peak current limit L=10 H, VOUT =28V, 5mA load 320 mA RLX Switch ‘On’ resistance 1.75 ILX(leak) Switch leakage current VLX=20V 1 µA VOUT Controller default output voltage FB pin floating 26 28 V VENH EN pin high level Input voltage Device active 1.5 VIN V VENL EN pin low level Input voltage Device in shutdown 0.4 V IENL EN pin low level input current VEN =0V -100 nA IENH EN pin high level input current VEN =VIN 1 A TEN(hold) (3) EN pin turn off delay VEN switched from high to low 120 µs ELECTRICAL CHARACTERISTICS: (Test conditions: V IN=VEN=3V, TAMB=25°C unless otherwise stated (1) ) NOTES: 1 Production testing of the device is performed at 25°C. Functional operation of the device over a –40°C to +85°C temperature range is guaranteed by design, characterization and process control. 2 Nominal ‘on’ time (TONnom ) is defined by the input voltage (VIN), coil inductance (L) and peak current (ILXpkdc) according to the expression: TONnom = {ILX(pkdc) x L/VIN} +200ns 3 This is the time for which the device remains active after the EN pin has been asserted low. This delay is necessary to allow the output to be maintained during dc PWM mode operation. |
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