TL499A Datasheet, PDF (5/8 Pages) Texas Instruments – WIDE-RANGE POWER-SUPPLY CONTROLLERS

1
SERIES IN1
3
SW REG IN2
RCL = 500 Ω
TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
APPLICATION INFORMATION
L = 50 µH
TL499A
1
8
SERIES IN1 OUTPUT
2
REF
7
GND (PWR)
3
SW REG IN2
6
SW IN
4 _{SW CURRENT}
5
GND
CTRL
CP = 0.01 µF
8
OUTPUT
+
RE1
CF = 470 µF
RE2 = 4.7 kΩ
Figure 1. TL499A Basic Configuration
Table 1. Maximum Output Current vs Input and Output Voltages
for Step-Up Switching Regulator With R_CL = 150 Ω
SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2)
OUTPUT
(V)
VOLTAGE 1.1 1.2 1.3 1.5 1.7
2
2.5
3
5
6
9
(V)
OUTPUT CURRENT
(mA)
30
65
90
25
50
80
100
20
20
25
30
80
100 100
15
15
20
30
45
55
100 100 100
12
10
15
20
25
30
40
55
70
100 100 100
10
15
20
25
30
35
45
65
80
100 100
9
20
25
25
35
40
50
70
90
100 100
6
30
35
40
45
55
75
95 100
5
35
40
45
55
70
85 100 100 Circuit of Figure 1, except:
4.5
35
45
50
60
75
95 100 100†
RCL = 150 Ω
3
55 65† 75† 95† 100†
CF = 330 µF
2.9
60† 70† 75† 100† 100†
CP = 0.1 µF
† _{The difference between the output and input voltage for these combinations is greater than the minimum}
output-to-input differential-voltage specification at 70°C (1.2 V), but less than the minimum at 85°C (1.9 V).
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