Datasheet

ELECTRICAL CHARACTERISTICS
(continued)
DC CHARACTERISTICS
Symbol Parameter Test Condition Min. Typ. Max. Unit Fig.
V
9on
Turn-on Threshold 10 11 12 V 7A
V
9 Hyst
Turn-off Hysteresys 1 V 7A
I
9Q
Quiescent Current V
12
= 0; S1 = D 13 19 mA 7A
I
9OQ
Operating Supply Current V
12
= 0; S1 = C; S2 = B 16 23 mA 7A
I
7L
Out Leak Current V
i
= 55V; S3 = A; V
12
= 0 2 mA 7A
SOFT START
Symbol Parameter Test Condition Min. Typ. Max. Unit Fig.
I
12
Soft Start Source Current V
12
= 3V; V
11
= 0V 70 100 130 µA7B
V
12
Output Saturation Voltage I
12
= 20mA; V
9
= 10V
I
12
= 200µA; V
9
= 10V
1
0.7
V
V
7B
7B
ERROR AMPLIFIER
Symbol Parameter Test Condition Min. Typ. Max. Unit Fig.
V
10H
High Level Out Voltage I
10
= -100µA; S1 = C
V
11
= 4.7V
6V7C
V
10L
Low Level Out Voltage I
10
= +100µA; S1 = C
V
11
= 5.3V;
1.2 V 7C
I
10H
Source Output Current V
10
= 1V; S1 = E
V
11
= 4.7V
100 150 µA7C
I
10L
Sink Output Current V
10
= 6V; S1 = D
V
11
= 5.3V
100 150 µA7C
I
11
Input Bias Current R
S
= 10KΩ 0.4 3 µA–
G
V
DC Open Loop Gain V
VCM
= 4V;
R
S
= 10Ω
60 dB –
SVR Supply Voltage Rejection 15 < V
i
< 50V;
R
S
= 10Ω
60 80 dB –
V
OS
Input Offset Voltage R
S
= 50Ω 210mV–
RAMP GENERATOR (pin 2)
Symbol Parameter Test Condition Min. Typ. Max. Unit Fig.
V
2
Ramp Valley S1 = C; S2 = B 1.2 1.5 V 7A
V
2
Ramp Peak S1 = C; V
i
= 15V
S2 = B; V
i
= 45V
2.5
5.5
V
V
7A
7A
I
2
Min. Ramp Current S1 = A; I
1
= 100µA 270 300 µA7A
I
2
Max. Ramp Current S1 = A; I1 = 1mA 2.4 2.7 mA 7A
SYNC FUNCTION (pin 13)
Symbol Parameter Test Condition Min. Typ. Max. Unit Fig.
V
13
Low Input Voltage V
i
= 15V to 50V; V
12
= 0;
S1 = C; S2 = B; S4 = B
–0.3 0.9 V 7A
V
13
High Input voltage V
12
= 0;
S1 = C; S2 = B; S4 = B
3.5 5.5 V 7A
I
13L
Sync Input Current with
Low Input Voltage
V
13
= V
2
= 0.9V; S4 = A;
S1 = C; S2 = B
0.4 mA 7A
I
13H
Input Current with High
Input Voltage
V
13
= 3.5V; S4 = A;
S1 = C; S2 = B
2mA7A
V
13
Output Amplitude 4 5 V –
t
W
Output Pulse Width V
thr
= 2.5V 0.3 0.5 0.8 µs–
L4970A
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