Datasheet

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SGLS121C − JULY 2002 − REVISED APRIL 2008
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics T
A
= −40_C to 125_C, V
CC
= 10 V (see Note 1), RT = 100 kΩ from REF to
RC, CT = 330 pF from RC to GND, 0.1-F capacitor from V
CC
to GND, 0.1-F capacitor from V
REF
to
GND and T
A
= T
J
(unless otherwise stated)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Undervoltage Lockout Section
UCC2800 6.6 7.2 7.8
Start threshold
See Note 6
UCC2801 8.6 9.4 10.2
V
Start threshold See Note 6
UCC2802/04 11.5 12.5 13.5
V
UCC2803/05 3.7 4.1 4.5
UCC2800 6.3 6.9 7.5
Stop threshold
See Note 6
UCC2801 6.8 7.4 8
V
Stop threshold See Note 6
UCC2802/04 7.6 8.3 9
V
UCC2803/05 3.2 3.6 4
UCC2800 0.12 0.3 0.48
Start to stop hysteresis
UCC2801 1.6 2 2.4
V
Start to stop hysteresis
UCC2802/04 3.5 4.2 5.1
V
UCC2803/05 0.2 0.5 0.8
Soft Start Section
COMP rise time FB = 1.8 V, Rise from 0.5 V to REF − 1 V 4 10 ms
Overall Section
Start-up current V
CC
< Start Threshold 0.1 0.2 mA
Operating supply current FB = 0 V, CS = 0 V 0.5 1 mA
V
CC
internal zener voltage I
CC
= 10 mA, See Notes 6 and 8 12 13.5 15 V
V
CC
internal zener voltage minus start
threshold voltage
See Note 6 UCC2802/04 0.5 1.0 V
NOTES: 1. Adjust V
CC
above the start threshold before setting at 10 V.
2. Oscillator frequency for the UCC2800, UCC2802 and UCC2803 is the output frequency.
Oscillator frequency for the UCC2801, UCC2804 and UCC2805 is twice the output frequency.
3. Gain is defined by:
A =
DV
COMP
DV
CS
0 v V
CS
v 0.8 V.
4. Parameter measured at trip point of latch with pin 2 at 0 V.
5. Total variation includes temperature stability and load regulation.
6. Start threshold, stop threshold, and zener shunt thresholds track one another.
7. Not production tested.
8. The device is fully operating in clamp mode as the forcing current is higher than the normal operating supply current.