TL499A_15 Datasheet, PDF (3/13 Pages) Texas Instruments – WIDE-RANGE POWER-SUPPLY CONTROLLERS

TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001
recommended operating conditions
MIN NOM MAX UNIT
Output voltage, VO
Input voltage, VI1 (SERIES IN1)
Input voltage, VI2 (SW REG IN2)
Output-to-input differential voltage, switching regulator, VO – VI2 (see Note 4)
Continuous output current, IO
Power switch current (at SW IN)
2.9
30 V
4.5
32 V
1.1
10 V
1.2
28.9 V
100 mA
500 mA
Current-limiting resistor, RCL
Filter capacitor
150
1000 Ω
100
470 µF
Pass capacitor
0.1
µF
Inductor, L (dcr ≤ 0.1 Ω)
50
150 µH
Operating free-air temperature, TA
–20
85 °C
NOTE 4: When operating temperature range is TA ≤ 70°C, minimum VO – VI2 is ≥ 1.2 V. When operating temperature range is TA ≤ 85°C, minimum
VO – VI2 is ≥ 1.9 V.
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TL499AC
MIN TYP MAX
Voltage deviation (see Note 5)
20
30
VO – VI2
Switching regulator
Dropout voltage
Series regulator
Reference voltage (internal)
Reference-voltage change with temperature
TA = –20°C to 70°C
TA = –20°C to 85°C
VI1 = 15 V, IO = 50 mA
VI1 = 5 V, VO = 3 V,
IO = 1 mA
1.2
1.9
1.8
1.2 1.26 1.32
5
10
Output regulation (of reference voltage)
Output current
(see Figure 1)
Switching regulator
Series regulator
IO = 1 mA to 50 mA
VI2 = 1.1 V, VO = 12 V,
VI2 = 1.5 V, VO = 15 V,
VI2 = 6 V, VO = 30 V,
RCL = 150 Ω,
RCL = 150 Ω,
RCL = 150 Ω,
TA = 25°C
TA = 25°C
TA = 25°C
10
30
10
15
65
100
Standby current
Switching regulator VI2 = 3 V, VO = 9 V,
Series regulator
VI1 = 15 V, VO = 9 V,
TA = 25°C
RE2 = 4.7 kΩ
15
80
0.8 1.2
+ ǒ Ǔ * ǒ Ǔ NOTE 5: Voltage deviation is the output voltage difference that occurs in a change from series regulation to switching regulation:
Voltage deviation V_O series regulation V_O switching regulation
UNIT
mV/V
V
V
mV/V
mV/V
mA
µA
mA
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