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ꢖ
SLUS395J - FEBRUARY 2000 - REVISED MARCH 2009
electrical characteristics, T = 0°C to 70°C for the UCC3817 and T = −40°C to 85°C for the UCC2817, T
A
T
A
A
= T VCC = 12 V, R = 22 kΩ, C = 270 pF, (unless otherwise noted)
J,
T
voltage reference section
PARAMETER
TEST CONDITIONS
MIN
7.387
7.369
0
TYP
MAX UNITS
T
= 0°C to 70°C
7.5 7.613
V
A
Input voltage
T
A
= −40°C to 85°C
7.5 7.631
V
Load regulation
I
= 1 mA to 2 mA
10
10
mV
mV
mA
REF
VCC = 10.8 V to 15 V,
= 0 V
Line regulation
See Note 2
0
Short-circuit current
V
−20
−25
−50
REF
< 10.8 V is shown in Figure 8.
NOTES: 2. Reference variation for V
CC
oscillator section
PARAMETER
Initial accuracy
TEST CONDITIONS
MIN
85
TYP
MAX UNITS
T
A
= 25°C
100
115
1
kHz
%
Voltage stability
VCC = 10.8 V to 15 V
Line, temp
−1
Total variation
80
120
5.5
kHz
V
Ramp peak voltage
4.5
5
4
Ramp amplitude voltage
(peak to peak)
3.5
4.5
V
peak current limit section
PARAMETER
PKLMT reference voltage
PKLMT propagation delay
TEST CONDITIONS
MIN
−15
150
TYP
MAX UNITS
15
mV
ns
350
500
multiplier section
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
I
, high line, low power output
MOUT
I
I
I
I
I
= 500 µA,
= 500 µA,
= 500 µA,
= 150 µA,
= 150 µA,
V
V
V
V
V
= 4.7 V,
= 4.7 V,
= 4.7 V,
= 1.4 V,
= 1.4 V,
VAOUT = 1.25 V
VAOUT = 1.25 V
VAOUT = 5 V
0
−6
−20
−23
µA
µA
µA
µA
µA
AC
AC
AC
AC
AC
FF
FF
FF
FF
FF
current, (0°C to 85°C)
I
, high line, low power output
MOUT
current, (−40°C to 85°C)
0
−70
−10
−6
I
, high line, high power output
, low line, low power output
, low line, high power output
, IAC limited output current
MOUT
current
−90 −105
−19 −50
I
MOUT
current
VAOUT = 1.25 V
VAOUT = 5 V
I
MOUT
current
−268 −300 −345
−250 −300 −400
I
I
I
I
I
I
I
I
= 150 µA,
= 300 µA,
= 150 µA,
= 500 µA,
= 500 µA,
= 500 µA,
= 150 µA,
V
FF
V
FF
V
FF
V
FF
V
FF
V
FF
V
FF
= 1.3 V,
= 3 V,
VAOUT = 5 V
µA
1/V
µA
µA
µA
µA
µW
MOUT
Gain constant (K)
AC
AC
AC
AC
AC
AC
AC
VAOUT = 2.5 V
VAOUT = 0.25 V
VAOUT = 0.25 V
VAOUT = 0.5 V
VAOUT = 0.5 V
VAOUT = 5 V
0.5
1
0
0
0
0
1.5
−2
= 1.4 V,
= 4.7 V,
= 4.7 V,
= 4.7 V,
= 1.4 V,
I
, zero current
MOUT
−2
I
I
, zero current, (0°C to 85°C)
, zero current, (−40°C to 85°C)
−3
MOUT
−3.5
MOUT
Power limit (I
MOUT
x V )
FF
−375 −420 −485
4
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