Zxld1320, Electrical characteristics – Diodes ZXLD1320 User Manual
Page 5
ZXLD1320
© Zetex Semiconductors plc 2008
Electrical characteristics (
Test conditions: VIN = 4V, T
AMB
= 25
°C unless otherwise stated
DC-DC converter supply parameters
NOTES:
(a) Production testing of the device is performed at 25
°C. Functional operation of the device and parameters specified from -40°C to
+125
° Care guaranteed by design, characterisation and process control.
DC-DC converter input parameters
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
IN
Supply voltage
Normal operation
4.0
18
V
Iq
Quiescent current
Measured into VIN
ADJ pin floating.
(Excluding switch
base current).
1.5
mA
I
STBY
Standby current
Measured into VIN.
ADJ pin grounded
12
20
µA
V
REF
Internal reference voltage
ADJ pin floating
2.0V<VIN<18V
480
500
520
mV
T
CO(REF)
Internal reference temperature
coefficient.
50
ppm
/K
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
SENSE
Peak switch current sense
voltage
Measured on I
SENSE
pin CFB pin at 0V
45
55
65
mV
I
SENSE
Sense input current
Measured into
ISENSE
with pin at
0V.
CFB pin at 0V
-15
-7
-1
µA
C
FB
Control loop compensation
capacitor
10
nF
V
ADJ
External dc control voltage
applied to ADJ pin to adjust
output current
DC brightness
control mode
50
500
mV
V
ADJ(th)
Switching threshold of ADJ pin Standby state to
normal operation
26
28
30
mV
TCO
(VADJ)
Temperature coefficient of
VADJ(th)
+0.3
%/K
R
ADJ
Internal resistor between VREF
and ADJ
VADJ<500mV
100
k
Ω
VADJ(clmp) Internal clamp voltage on ADJ
pin
100µA injected into
ADJ pin
575
mV