ꢀ ꢁꢂ ꢃꢄ ꢂꢅ
ꢀ ꢁꢂ ꢃꢄ ꢂꢆ
SLUS557B − MARCH 2003 − REVISED APRIL 2004
ELECTRICAL CHARACTERISTICS
T
= −40°C to 105°C , T = T
A,
R
= 3.65 kΩ, C = 1 nF, V
CC
= 15 V (unless otherwise noted)
A
J
T
T
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
REFERENCE
V
REF
Reference voltage
T = 25°C,
I = 1 mA
REF
5.05
5.10
2
5.15
15
V
J
Line regulation voltage
Load regulation voltage
10 V ≤ V
≤ 30 V
CC
mV
1 mA ≤ I
≤ 10 mA
5
15
REF
(1)
Temperature stability
T
(min)
< T < T
(max)
0.2
0.4 mV/°C
A
(1)
Total output voltage variation
Line, load, temperature
10 Hz < f < 10 kHz
4.95
5.25
V
(1)
Output noise voltage
50
5
µV
mV
mA
(1)
Long term stability voltage
T = 125°C,
J
1000 hours
25
I
Short circuit current
V
REF
= 0 V
−20
360
−50
−100
SS
OSCILLATOR
Initial accuracy
(1)
(1)
f
T = 25°C
J
400
0.2%
5%
440
kHz
kHz
V
OSC
Voltage stability
Temperature stability
10 V ≤ V
CC
≤ 30 V
2.0%
(1)
(1)
T
(min)
< T < T
(max)
A
Total voltage variation
Line, temperature
340
3.9
460
V
High-level clock output voltage
Low-level clock output voltage
4.5
2.3
CLOCK_H
V
2.9
3.0
CLOCK_L
(1)
Ramp peak voltage
V
2.6
0.70
1.6
2.8
RAMP(p)
RAMP(v)
(1)
Ramp valley voltage
V
1.00
1.8
1.25
2.0
(1)
V
Ramp vally-to-peak voltage
RAMP(v-p)
ERROR AMPLIFIER
V
Input offset voltage
Input bias current
Input offset current
Open loop gain
15
3.0
1.0
mV
IN
I
0.6
0.1
95
BIAS
IN
µA
I
A
VOL
1 V ≤ V
OUT
≤ 4 V
60
75
CMRR
PSRR
Common mode rejection ratio
Power supply rejection ratio
Output sink current
1.5 V ≤ V
CM
≤ 5.5 V
95
dB
10 V ≤ V
CC
≤ 30 V
85
110
2.5
−1.3
4.7
0.5
5.5
12
I
V
= 1 V
= 4 V
1.0
−0.5
4.0
0
OUT(sink)
(EAOUT)
(EAOUT)
(EAOUT)
(EAOUT)
mA
V
Output source current
V
IOUT(src)
V
V
High-level output voltage
Low-level output voltage
I
I
= −0.5 mA
= 1 mA
5.0
1.0
OH
OL
(1)
Unity gain bandwidth
3.0
6
MHz
(1)
Slew rate
V/µs
PWM COMPARATOR
I
RAMP bias current
V
= 0 V
−1
90%
45%
−5
µA
BIAS
RAMP
UC28023
UC28025
UC28023
UC28025
80%
40%
Maximum duty cycle
(2)
0%
0%
Minimum duty cycle
EAOUT zero DC threshold
(1)
V
= 0 V
1.10
1.25
50
1.40
100
V
RAMP
t
Delay to output time
ns
DELAY
(1)
(2)
Ensured by design. Not production tested.
Tested as 80% minimum for the oscillator which is the equivalent of 40% for UC28025.
3
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