zxld1615 Zetex Semiconductors plc., zxld1615 Datasheet - Page 2

• Manufacturer Part Number: zxld1615
• Description: Adjustable Dc-dc Boost Converter With Internal Switch In Tsot23-5
• Manufacturer: Zetex Semiconductors plc.

ELECTRICAL CHARACTERISTICS:
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
2 Nominal ‘on’ time (TONnom ) is defined by the input voltage (V
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
4 The maximum PWM signal frequency during this mode of operation should be kept as low as possible to minimize errors due to the turn-off
ABSOLUTE MAXIMUM RATINGS
(Voltages to GND unless otherwise stated)
Input voltage (V
LX output voltage (V
Switch output current (I
Power dissipation (PD)
Operating temperature (T
Storage temperature (T
Junction temperature (Tj
ZXLD1615
Symbol
V
I
V
f
T
T
I
R
I
V
V
I
I
T
f
A
IN
LX
LXpk
LX(leak)
ENL
ENH
LPF
EN(hold)
OFF
ON
IN
FB
LX
ENH
ENL
T/T
guaranteed by design, characterization and process control.
T
maintained during dc PWM mode operation.
delay
LPF
ONnom
S E M I C O N D U C T O R S
(2)
(3)
= {I
LX(pkdc)
Parameter
Input voltage
Supply current
FB pin control voltage
Operating frequency
LX output ‘OFF’ time
LX output ‘ON’ time
Switch peak current limit
Switch 'On' resistance
Switch leakage current
EN pin high level Input voltage Device active
EN pin low level Input voltage Device in shutdown
EN pin low level input current
EN pin high level input current V
EN pin turn off delay
PWM duty cycle range at
‘EN’ input for dc output
voltage control
Internal PWM low pass filter
cut-off frequency
Filter attenuation
IN
x L/V
)
Quiescent
Shutdown
IN
LX
} +200ns
)
ST
LX
OP
)
MAX
)
)
)
7V
30V
500mA
300mW
-40 to 85°C
-55 to 150°C
125°C
(Test conditions: V
V
V
10kHz < f < 100kHz, V
Conditions
L=10 H, V
L=10 H, V
V
V
V
f=30kHz
EN
EN
LX
EN
EN
EN
=20V
= V
= 0V
=0V
=V
switched from high to low
IN
IN
IN
, I
), coil inductance (L) and peak current (I
LX
OUT
OUT
= 0, Output not switching
2
=28V, 5mA load
=28V, 5mA load
IN
=V
EN
ENH
=3V, T
=V
IN
AMB
=25°C unless otherwise stated
LXpkdc
0.98
Min
350
1.5
2.5
20
) according to the expression:
ISSUE 3 - AUGUST 2004
120
1.75
52.5
Typ
<10
600
500
320
60
4
Max
-100
1.07
100
100
100
V
5.5
0.4
5
1
1
IN
Units
kHz
mA
kHz
(1)
µA
nA
µA
nA
dB
ns
µs
µs
%
V
V
V
V
A
)