Datasheet

TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN NOM MAX UNIT
Output voltage, V
O
2.9 30 V
Input voltage, V
I
1 (SERIES IN1) 4.5 32 V
Input voltage, V
I
2 (SW REG IN2) 1.1 10 V
Output-to-input differential voltage, switching regulator, V
O
– V
I
2 (see Note 4) 1.2 28.9 V
Continuous output current, I
O
100 mA
Power switch current (at SW IN) 500 mA
Current-limiting resistor, R
CL
150 1000 Ω
Filter capacitor 100 470 µF
Pass capacitor 0.1 µF
Inductor, L (dcr ≤ 0.1 Ω) 50 150 µH
Operating free-air temperature, T
A
–20 85 °C
NOTE 4: When operating temperature range is T
A
≤ 70°C, minimum V
O
– V
I
2 is ≥ 1.2 V. When operating temperature range is T
A
≤85°C, minimum
V
O
– V
I
2 is ≥ 1.9 V.
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TL499AC
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP MAX
UNIT
Voltage deviation (see Note 5) 20 30 mV/V
V
O
V
I
2
Switching regulator
T
A
= –20°C to 70°C 1.2
V
O
–
V
I
2
Switching
regulator
T
A
= –20°C to 85°C 1.9
V
Dropout voltage Series regulator V
I
1 = 15 V, I
O
= 50 mA 1.8
Reference voltage (internal) V
I
1 = 5 V, V
O
= 3 V, I
O
= 1 mA 1.2 1.26 1.32 V
Reference-voltage change with temperature 5 10 mV/V
Output regulation (of reference voltage) I
O
= 1 mA to 50 mA 10 30 mV/V
V
I
2 = 1.1 V, V
O
= 12 V, R
CL
= 150 Ω, T
A
= 25°C 10
Output current
Switching regulator
V
I
2 = 1.5 V, V
O
= 15 V, R
CL
= 150 Ω, T
A
= 25°C 15
mA
(see Figure 1)
V
I
2 = 6 V, V
O
= 30 V, R
CL
= 150 Ω, T
A
= 25°C 65
mA
Series regulator 100
Standby current
Switching regulator V
I
2 = 3 V, V
O
= 9 V, T
A
= 25°C 15 80 µA
Standby
current
Series regulator V
I
1 = 15 V, V
O
= 9 V, R
E
2 = 4.7 kΩ 0.8 1.2 mA
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