Datasheet

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Symbol Parameter TestConditions Min. Typ. Max. Unit
DYNAMIC CHARACTERISTICS (cont’d)
f Switching frequency 85 100 115 KHz
∆
f
∆
V
i
Voltage stability of
switching frequency
V
i
= 9V to 46V 0.5 %
∆ f
∆
T
j
Temperature stability of
switching frequency
T
j
=0°C to 125°C1%
f
max
Maximum operating
switching frequency
V
o
=V
ref
I
o
= 1A 120 150 KHz
T
sd
Thermal shutdown
junction temperature
150 °C
DC CHARACTERISTICS
I
7Q
Quiescent drain current 100% duty cycle
pins 2 and 14 open
V
i
= 46V
30 40 mA
0% duty cycle 15 20 mA
-I
2L
Output leakage current 0% duty cycle 1 mA
SOFT START
I
15SO
Source current 100 140 180 µA
I
15SI
Sink current 50 70 120 µA
ERROR AMPLIFIER
V
11H
High level output voltage V
10
= 4.7V I
11
= 100µA 3.5 V
V
11L
Low level output voltage V
10
= 5.3V I
11
= 100µA 0.5 V
I
11SI
Sink output current V
10
= 5.3V 100 150 µA
-I
11SO
Source output current V
10
= 4.7V 100 150 µA
I
10
Input bias current V
10
= 5.2V 2 10 µA
G
v
DC open loop gain V
11
=1Vto3V 46 55 dB
OSCILLATOR
-I
14
Oscillator source current 5 mA
ELECTRICAL CHARACTERISTICS (continued)
L4962