Datasheet

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SLUS168D – APRIL 1999 – REVISED AUGUST 2002
4
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electrical characteristics, T
A
= 0°C to 70°C for the UCC3808–x, –40°C to 85°C for the UCC2808–x and –55°C
to 125°C for the UCC1808–x, VDD = 10 V (See Note 6), 1 µF capacitor from VDD to GND, R = 22 kΩ, C = 330 pF,
T
A
= T
J
, (unless otherwise specified)
output section
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
OUT low level I = 100 mA 0.5 1 V
OUT high level I = –50 mA, VDD – OUT 0.5 1 V
Rise time C
L
= 1 nF 25 60 ns
Fall time C
L
= 1 nF 25 60 ns
undervoltage lockout section
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Start threshold
UCCx808–1, See Note 6 11.5 12.5 13.5 V
Start threshold
UCCx808–2 4.1 4.3 4.5 V
Minim m operating oltage after start
UCCx808–1 7.6 8.3 9 V
Minimum operating voltage after start
UCCx808–2 3.9 4.1 4.3 V
H steresis
UCCx808–1 3.5 4.2 5.1 V
Hysteresis
UCCx808–2 0.1 0.2 0.3 V
soft start section
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
COMP rise time FB = 1.8 V, rise from 0.5 V to 4 V 3.5 20 ms
overall section
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Startup current VDD < start threshold 130 260 µA
Operating supply current FB = 0 V, CS = 0 V, See Note 5 and 6 1 2 mA
VDD zener shunt voltage IDD = 10 mA, See Note 4 13 14 15 V
NOTES: 1. Measured at RC. Signal amplitude tracks VDD.
2. Gain is defined by: A +
DV
COMP
DV
CS
,0v V
CS
v 0.4 V,
3. Parameter measured at trip point of latch with FB at 0V.
4. Start threshold and zener shunt threshold track one another.
5. For UCCx808–1, set VDD above the start threshold before setting at 10 V.
6. Does not include current in the external oscillator network.