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ZXLD1601 Fiches technique(PDF) 2 Page - Zetex Semiconductors

No de pièce ZXLD1601
Description  ADJUSTABLE DC - DC BOOST CONVERTER WITH INTERNAL SWITCH IN SC70
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Fabricant  ZETEX [Zetex Semiconductors]
Site Internet  http://www.diodes.com/
Logo ZETEX - Zetex Semiconductors

ZXLD1601 Fiches technique(HTML) 2 Page - Zetex Semiconductors

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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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