SG3525A
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (V
CC
= +20 Vdc, T
A
= T
low
to T
high
[Note 3], unless otherwise noted.)
Characteristics Symbol Min Typ Max Unit
REFERENCE SECTION
Reference Output Voltage (T
J
= +25°C) V
ref
5.00 5.10 5.20 Vdc
Line Regulation (+8.0 V ≤ V
CC
≤ +35 V) Reg
line
− 10 20 mV
Load Regulation (0 mA ≤ I
L
≤ 20 mA) Reg
load
− 20 50 mV
Temperature Stability V
ref
/T − 20 − mV
Total Output Variation Includes Line and Load Regulation over Temperature V
ref
4.95 − 5.25 Vdc
Short Circuit Current (V
ref
= 0 V, T
J
= +25°C) I
SC
− 80 100 mA
Output Noise Voltage (10 Hz ≤ f ≤ 10 kHz, T
J
= +25°C) V
n
− 40 200 V
rms
Long Term Stability (T
J
= +125°C) (Note 4) S − 20 50 mV/khr
OSCILLATOR SECTION (Note 5, unless otherwise noted.)
Initial Accuracy (T
J
= +25°C) − ±2.0 ±6.0 %
Frequency Stability with Voltage
(+8.0 V ≤ V
CC
≤ +35 V)
f
osc
D
VCC
− ±1.0 ±2.0 %
Frequency Stability with Temperature
f
osc
D
T
− ±0.3 − %
Minimum Frequency (R
T
= 150 k, C
T
= 0.2 F) f
min
− 50 − Hz
Maximum Frequency (R
T
= 2.0 k, C
T
= 1.0 nF) f
max
400 − − kHz
Current Mirror (I
RT
= 2.0 mA) 1.7 2.0 2.2 mA
Clock Amplitude 3.0 3.5 − V
Clock Width (T
J
= +25°C) 0.3 0.5 1.0 s
Sync Threshold 1.2 2.0 2.8 V
Sync Input Current (Sync Voltage = +3.5 V) − 1.0 2.5 mA
ERROR AMPLIFIER SECTION (V
CM
= +5.1 V)
Input Offset Voltage
V
IO
− 2.0 10 mV
Input Bias Current I
IB
− 1.0 10 A
Input Offset Current I
IO
− − 1.0 A
DC Open Loop Gain (R
L
≥ 10 M) A
VOL
60 75 − dB
Low Level Output Voltage V
OL
− 0.2 0.5 V
High Level Output Voltage V
OH
3.8 5.6 − V
Common Mode Rejection Ratio (+1.5 V ≤ V
CM
≤ +5.2 V) CMRR 60 75 − dB
Power Supply Rejection Ratio (+8.0 V ≤ V
CC
≤ +35 V) PSRR 50 60 − dB
PWM COMPARATOR SECTION
Minimum Duty Cycle
DC
min
− − 0 %
Maximum Duty Cycle DC
max
45 49 − %
Input Threshold, Zero Duty Cycle (Note 5) V
th
0.6 0.9 − V
Input Threshold, Maximum Duty Cycle (Note 5) V
th
− 3.3 3.6 V
Input Bias Current I
IB
− 0.05 1.0 A
3. T
low
= 0° T
high
= +70°C
4. Since long term stability cannot be measured on each device before shipment, this specification is an engineering estimate of average
stability from lot to lot.
5. Tested at f
osc
= 40 kHz (R
T
= 3.6 k, C
T
= 0.01 F, R
D
= 0 ).
