TI TL499ACP

TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
D
D
D
D
D
D
P OR PS PACKAGE
(TOP VIEW)
Internal Series-Pass and Step-Up Switching
Regulator
Output Adjustable From 2.9 V to 30 V
1-V to 10-V Input for Switching Regulator
4.5-V to 32-V Input for Series Regulator
Externally Controlled Switching Current
No External Rectifier Required
SERIES IN1
REF
SW REG IN2
SW CURRENT CTRL
1
8
2
7
3
6
4
5
OUTPUT
GND (PWR)
SW IN
GND
description
The TL499A is an integrated circuit designed to provide a wide range of adjustable regulated supply voltages.
The regulated output voltage can be varied from 2.9 V to 30 V by adjusting two external resistors. When the
TL499A is ac-coupled to line power through a step-down transformer, it operates as a series dc voltage regulator
to maintain the regulated output voltage. With the addition of a battery from 1.1 V to 10 V, an inductor, a filter
capacitor, and two resistors, the TL499A operates as a step-up switching regulator during an ac-line failure.
The adjustable regulated output voltage makes the TL499A useful for a wide range of applications. Providing
backup power during an ac-line failure makes the TL499A extremely useful in microprocessor memory
applications.
The TL499AC is characterized for operation from –20°C to 85°C.
AVAILABLE OPTIONS
TA
PLASTIC DIP
(P)
PLASTIC
SMALL-OUTLINE
(PS)
CHIP FORM
(Y)
–20°C to 85°C
TL499ACP
TL499ACPS
TL499AY
The PS package is available taped and reeled. Add the suffix R to device
type (e.g., TL499ACPSR). Chip forms are tested at 25°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright  2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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1
TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
functional block diagram
SW IN
6
3
Blocking Diode
8
OUTPUT
SW REG IN2
Startup
Voltage
Sense
SW REG
Control
7
GND (PWR)
4
SW CURRENT CTRL
Current Sense
–
+
+
2
REF
–
+
1
SERIES IN1
+
Startup
5
GND
2
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TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Output voltage, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V
Input voltage, series regulator, VI1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V
Input voltage, switching regulator, VI2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V
Blocking-diode reverse voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V
Blocking-diode forward current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A
Power switch current (SW IN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A
Package thermal impedance, θJA (see Notes 2 and 3): P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W
PS package . . . . . . . . . . . . . . . . . . . . . . . . . . . 95°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°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.
NOTES: 1. All voltage values are with respect to network ground terminal.
2. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
3. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions
MIN
NOM
MAX
UNIT
Output voltage, VO
2.9
30
V
Input voltage, VI1 (SERIES IN1)
4.5
32
V
Input voltage, VI2 (SW REG IN2)
1.1
10
V
Output-to-input differential voltage, switching regulator, VO – VI2 (see Note 4)
1.2
28.9
V
Continuous output current, IO
100
mA
Power switch current (at SW IN)
500
mA
Current-limiting resistor, RCL
150
1000
Ω
Filter capacitor
100
470
µF
50
150
µH
–20
85
°C
Pass capacitor
µF
0.1
Inductor, L (dcr ≤ 0.1 Ω)
Operating free-air temperature, TA
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.
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TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TL499AC
TEST CONDITIONS
MIN
Voltage deviation (see Note 5)
Dropout voltage
20
Switching regulator
Series regulator
Reference voltage (internal)
TA = –20°C to 70°C
Output regulation (of reference voltage)
Switching regulator
Switching regulator
Series regulator
30
1.9
VI1 = 15 V,
VI2 = 5 V,
IO = 50 mA
VO = 3 V,
IO = 1 mA to 50 mA
VI2 = 1.1 V, VO = 12 V,
VI2 = 1.5 V,
VI2 = 6 V,
UNIT
mV/V
VO = 15 V,
VO = 30 V,
V
1.8
IO = 1 mA
1.2
RCL = 150 Ω,
10
RCL = 150 Ω,
TA = 25°C
TA = 25°C
RCL = 150 Ω,
TA = 25°C
65
1.26
1.32
5
10
mV/V
10
30
mV/V
15
V
mA
Series regulator
Standby current
MAX
1.2
Reference-voltage change with temperature
Output current
(see Figure 1)
TYP
100
VI2 = 3 V,
VI1 = 15 V,
VO = 9 V,
VO = 9 V,
TA = 25°C
RE2 = 4.7 kΩ
15
80
µA
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
+ ǒ
Ǔ* ǒ
Ǔ
electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
TL499AY
MIN
Voltage deviation (see Note 5)
Dropout voltage
Switching regulator
Series regulator
Reference voltage (internal)
Reference-voltage change with temperature
Output regulation (of reference voltage)
Output current
(see Figure 1)
Switching regulator
TYP
MAX
20
30
TA = –20°C to 70°C
TA = –20°C to 85°C
1.2
VI1 = 15 V,
VI2 = 5 V,
1.8
1.9
IO = 50 mA
VO = 3 V,
IO = 1 mA
1.2
TA = –20°C to 85°C
IO = 1 mA to 50 mA
VI2 = 1.1 V,
VI2 = 1.5 V,
VO = 12 V,
VO = 15 V,
RCL = 150 Ω
10
RCL = 150 Ω
15
VI2 = 6 V,
VO = 30 V,
RCL = 150 Ω
65
VI2 = 3 V,
VI1 = 15 V,
VO = 9 V
VO = 9 V,
UNIT
mV/V
V
1.26
1.32
5
10
mV/V
V
10
30
mV/V
mA
Series regulator
100
80
µA
Series regulator
RE2 = 4.7 kΩ
0.8
1.2
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
mA
Standby current
Switching regulator
+ ǒ
4
Ǔ* ǒ
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TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
APPLICATION INFORMATION
L = 50 µH
TL499A
1
1
SERIES IN1
2
3
3
SW REG IN2
4
SERIES IN1
OUTPUT
GND (PWR)
REF
SW REG IN2
SW CURRENT
CTRL
SW IN
GND
8
8
OUTPUT
7
6
+
5
CP = 0.01 µF
CF = 470 µF
RE1
RCL = 500 Ω
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 RCL = 150 Ω
OUTPUT
VOLTAGE
(V)
SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2)
(V)
1.1
1.2
1.3
1.5
1.7
2
2.5
3
5
6
30
25
20
15
65
90
50
80
100
20
25
30
80
100
100
15
20
30
45
55
100
100
100
100
12
10
15
20
25
30
40
55
70
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
4.5
35
45
50
60
75
95
100
100
100†
55
60†
65†
70†
75†
75†
95†
100†
100†
100†
3
9
OUTPUT CURRENT
(mA)
Circuit of Figure 1, except:
RCL = 150 Ω
CF = 330 µF
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).
2.9
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TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
APPLICATION INFORMATION
Table 2. Maximum Output Current vs Input and Output Voltages
for Step-Up Switching Regulator With RCL = 200 Ω
OUTPUT
VOLTAGE
(V)
SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2)
(V)
1.1
1.2
1.3
1.5
1.7
2
2.5
3
5
6
9
50
100
50
70
100
70
90
100
OUTPUT CURRENT
(mA)
30
25
20
15
15
25
30
10
15
25
35
45
90
100
100
12
10
10
15
20
25
35
45
60
100
100
100
10
15
20
20
25
30
40
55
70
100
100
9
20
20
25
30
35
45
60
80
100
6
25
30
35
45
50
65
90
100
100
100†
5
30
35
40
55
60
75
100
4.5
35
40
45
55
65
85
100
3
50
50†
55†
60†
65†
65†
80†
85†
90†
100†
Circuit of Figure 1, except:
RCL = 200 Ω
CF = 330 µF
2.9
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).
Table 3. Maximum Output Current vs Input and Output Voltages
for Step-Up Switching Regulator With RCL = 300 Ω
OUTPUT
VOLTAGE
(V)
SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2)
(V)
1.1
1.2
1.3
1.5
1.7
2
2.5
3
5
6
9
40
70
OUTPUT CURRENT
(mA)
30
25
20
15
40
55
100
10
15
20
55
70
100
10
10
20
30
35
75
95
100
12
10
10
10
15
20
25
35
45
95
100
100
10
15
15
15
20
25
30
45
55
100
100
9
15
15
20
25
30
35
50
60
100
100
6
25
25
30
35
45
55
70
90
100
100†
5
30
30
35
45
50
65
85
4.5
30
35
40
45
55
70
95
3
45
45†
50†
50†
55†
60†
70†
75†
90†
95†
Circuit of Figure 1, except:
RCL = 300 Ω
CF = 330 µF
2.9
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).
6
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TL499A
WIDE-RANGE POWER-SUPPLY CONTROLLERS
SLVS029F – JANUARY 1984 – REVISED MAY 2000
APPLICATION INFORMATION
Table 4. Maximum Output Current vs Input and Output Voltages
for Step-Up Switching Regulator With RCL = 510 Ω
OUTPUT
VOLTAGE
(V)
SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2)
(V)
1.1
1.2
1.3
1.5
1.7
2
2.5
3
5
6
9
30
50
OUTPUT CURRENT
(mA)
30
25
25
40
75
20
40
55
90
15
15
20
55
70
100
10
15
25
35
65
80
100
10
20
25
30
40
70
85
75
100
12
10
9
10
10
10
15
20
25
35
45
6
15
20
20
25
30
35
50
60
70
90†
5
20
20
25
30
35
45
55
4.5
20
25
30
35
40
50
65
3
35
35†
35†
35†
40†
40†
50†
55†
75†
80†
Circuit of Figure 1, except:
RCL = 510 Ω
CF = 330 µF
2.9
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).
Table 5. Maximum Output Current vs Input and Output Voltages
for Step-Up Switching Regulator With RCL = 1 kΩ
OUTPUT
VOLTAGE
(V)
SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2)
(V)
1.1
1.2
1.3
1.5
1.7
2
2.5
3
5
6
9
OUTPUT CURRENT
(mA)
30
35
25
35
50
20
35
60
15
10
30
45
65
12
20
40
45
85
15
25
40
55
45
60
10
9
10
10
15
25
30
6
10
10
10
15
20
20
30
35
40
45†
5
10
10
15
20
20
25
35
4.5
15
15
15
20
25
30
40
3
20
20†
25†
25†
25†
25†
30†
30†
35†
45†
Circuit of Figure 1, except:
RCL = 1 kΩ
CF = 330 µF
2.9
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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Copyright  2000, Texas Instruments Incorporated