LND3842/43/44/45
ELECTRICAL CHARACTERISTICS
(*Vcc =15 V, R
T
=10kΩ ,C
T
=3.3nF, T
A
=0 to 70° C, unless otherwise specified )
Characteristics
Reference Section
Reference Output Voltage
Line Regulation
Load Regulation
Short Circuit Output
Current
Oscillator Section
Oscillation Frequency
Frequency change with
Voltage
Oscillator Amplitude
Error Amplitude Section
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Power Supply Rejection
ratio
Output Sink Current
Output Source current
High Output Voltage
Low Output Voltage
Current Sense Section
Gain
Maximum Input Signal
Supply Voltage rejection
Input Bias Current
Output Section
Low Output Voltage
High Output Voltage
Rise Time
Fall time
Symbol
V
REF
∆V
REF
∆
V
REF
I
SC
f
∆f/∆V
cc
V
(OSC)
I
BIAS
V
I(E,A)
A
VOL
PSRR
I
SINK
I
SOURCE
V
OH
V
OL
G
V
V
I(MAX)
SVR
I
BIAS
V
OL
V
OH
t
R
t
F
V
TH(ST)
V
OPR(MIN)
D
(MAX)
D
(MAX)
I
ST
I
CC(OPR)
V
Z
LND3842A/43A/44A/45A
LND3842B/43B/44B/45B
V
PIN3
=V
PIN2
=0V
I
CC
=25mA
0.17
0.45
13
38
Test Conditions
T
J
=25°C, I
REF
=1mA
12V≤V
CC
≤25V
1mA≤ I
REF
≤20mA
T
A
=25°C
T
J
=25°C
12V≤V
CC
≤25V
(Peak to Peak)
V
FB
=3V
V
pin1
=2.5V
2V≤V
O
≤4V
12V≤V
CC
≤25V
V
pin2
=2.7V, Vpin1=1.1V
V
pin2
=2.3V, V
pin1
=5V
V
pin2
=2.3V,R
L
=15kΩ to
GND
V
pin2
=2.7V,R
L
=15kΩ t o
PIN 8
(Note 1& 2)
V
pin1
=5V(note 1)
12V≤V
cc
≤25V(note
1)
Vpin3= 3V
I
sink
=20mA
I
sink
=200mA
I
sink
=20mA
I
sink
=200mA
T
J
=25°C, C
L
=1nF(note
3)
T
J
=25°C, C
L
=1nF(note
3)
LND3842A,B/44A,B
LND3842A,B/45A,B
LND3842A,B/44A,B
LND3842A,B/45A,B
LND3842A,B/43A,B
LND3842A,B/45A,B
47
Min
4.9
Typ
5.0
6.0
6.0
100
52
0.05
1.6
-0.1
2.5
90
70
7
-1.0
6.0
V
0.8
2.85
0.9
3.0
1.0
70
-3.0
0.08
1.4
13.5
13.0
45
35
14.5
7.8
8.5
7.0
95
47
16.0
8.4
10
7.6
97
48
1.1
3.15
1.1
-10
0.4
2.2
V/V
V
dB
µA
-2
2.58
Max
5.1
20
25
180
57
1.0
Unit
V
mV
mA
KHz
%
V
µA
V
dB
mA
mA
65
60
2
-0.5
5.0
13
12
V
150
150
17.5
9.0
11.5
8.2
100
50
0
0.3
1
17
nS
nS
Undervoltage Lockout Section
Start Threshold
Min. Operating Voltage
(After Turn on)
PWM Section
Max. Duty Cycle
Min. Duty cycle
Total Standby Current
Start-Up current
Operating Supply Current
Zener Voltage
V
V
%
mA
mA
V
30
*Adjust V
CC
above the start threshold before setting it to 15V.
•
Linear Dimensions, Inc.
•
445 East Ohio Street, Chicago IL 60611 USA
•
tel 312.321.1810
•
fax 312.321.1830
•
•
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