TL497AC Datasheet, PDF (4/11 Pages) Texas Instruments – SWITCHING VOLTAGE REGULATORS

TL497AC, TL497AI, TL497AY
SWITCHING VOLTAGE REGULATORS
SLVS009C – JUNE 1976 – REVISED AUGUST 1995
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^†
Supply voltage, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V
Output voltage, V_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V
Input voltage, V_I(COMP INPUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V
Input voltage, V_I (INHIBIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V
Diode reverse voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V
Power switch current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750 mA
Diode forward current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750 mA
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T_A: TL497AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
TL497AI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values except diode voltages are with respect to network ground terminal.
PACKAGE
D
N
PW
TA ≤ 25°C
POWER RATING
950 mW
1000 mW
700 mW
DISSIPATION RATING TABLE
DERATING
FACTOR
7.6 mW/°C
DERATE
ABOVE TA
25°C
9.2 mW/°C
41°C
5.6 mW/°C
25°C
TA = 70°C
POWER RATING
608 mW
733 mW
448 mW
TA = 85°C
POWER RATING
494 mW
595 mW
—
recommended operating conditions
Supply voltage, VCC
High-level input voltage, VIH, INHIBIT
Low-level input voltage, VIL, INHIBIT
Step-up configuration (see Figure 1)
Output voltage Step-down configuration (see Figure 2)
Inverting regulator (see Figure 3)
Power switch current
Diode forward current
Operating free-air temperature, TA
TL497AC
TL497AI
MIN
4.5
2.5
VI + 2
Vref
–Vref
0
– 40
MAX
12
0.8
30
VI – 1
– 25
500
500
70
85
UNIT
V
V
V
V
mA
mA
°C
4–4
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