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Diodes Incorporated
ZXLD1371
Electrical Characteristics (Test conditions: V IN = V AUX = 12V, T A = 25°C, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Supply and reference parameters
V UV-
V UV+
Under-Voltage detection threshold
Normal operation to switch disabled
Under-Voltage detection threshold
Switch disabled to normal operation
V IN or V AUX falling (Note 8)
V IN or V AUX rising (Note 8)
4.5
4.9
V
V
I Q-IN
I Q-AUX
I SB-IN
I SB-AUX
Quiescent current into V IN
Quiescent current into V AUX
Standby current into V IN .
Standby current into V AUX .
PWM pin floating.
Output not switching
PWM pin grounded
for more than 15ms
1.5
150
90
0.7
3
300
150
10
mA
μA
μA
μA
V REF
Internal reference voltage
No load
1.237
1.25
1.263
V
Δ V REF
V REF_LINE
V REF-TC
Change in reference voltage with output
current
Reference voltage line regulation
Reference temperature coefficient
Sourcing 1mA
Sinking 25μA
V IN = V AUX , 8.0V<V IN = <60V
-5
-60
-90
±50
5
mV
dB
ppm/°C
DC-DC converter parameters
I ADJ
V GI
I GI
ADJ input current ( Note 9 )
GI Voltage threshold for boost and buck-
boost modes selection ( Note 9 )
GI input current ( Note 9 )
V ADJ ≤ 1.25V
V ADJ = 5.0V
V ADJ = 1.25V
V GI ≤ 1.25V
V GI = 5.0V
100
5
0.8
100
5
nA
μA
V
nA
μA
I PWM
PWM input current
V PWM = 5.5V
36
100
μA
t PWMoff
T SDH
T SDL
PWM pulse width
(to enter shutdown state)
Thermal shutdown upper threshold
(GATE output forced low)
Thermal shutdown lower threshold
(GATE output re-enabled)
PWM input low
Temperature rising.
Temperature falling.
10
15
150
125
25
ms
oC
oC
High-Side Current Monitor (Pin ISM)
I ISM
V SENSE_acc
V SENSE-OC
Input Current
Accuracy of nominal V SENSE threshold
voltage
Over-current sense threshold voltage
Measured into ISM pin V ISM = 12V
V ADJ = 1.25V
300
11
±0.25
350
20
±2
375
μA
%
mV
Notes:
8.
9.
UVLO levels are such that all ZXLD1371 will function above 5.4V for rising supply voltages and function down to 5V for falling supply voltages.
The ADJ and GI pins have an internal clamp that limits the internal node to less than 3V. This provides some failsafe should those pins get
overdriven.
ZXLD1371
Document number: DS35436 Rev. 1 - 2
5 of 42
www.diodes.com
February 2012
? Diodes Incorporated
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