zxld1320 Zetex Semiconductors plc., zxld1320 Datasheet - Page 5

• Manufacturer Part Number: zxld1320
• Description: Buck Mode Dc-dc Converter For Led Driving With 1.5a Output And Current Control
• Manufacturer: Zetex Semiconductors plc.

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