TL2575-33I [TI]
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS; 1 -A简单的降压开关稳压器型号: | TL2575-33I |
厂家: | TEXAS INSTRUMENTS |
描述: | 1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS |
文件: | 总28页 (文件大小:957K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
FEATURES
KTT (TO-263) PACKAGE
(TOP VIEW)
•
Fixed 3.3-V, 5-V, 12-V, and 15-V Options With
±5% Regulation (Max) Over Line, Load, and
Temperature Conditions
5
4
3
ON/OFF
FEEDBACK
GND
OUTPUT
VIN
•
Adjustable Option With a Range of 1.23 V to
37 V (57 V for HV Version) and ±4%
Regulation (Max) Over Line, Load, and
Temperature Conditions
2
1
N (PDIP) PACKAGE
(TOP VIEW)
•
•
Specified 1-A Output Current
Wide Input Voltage Range…4.75 V to 40 V
(60 V for HV Version)
NC
NC
VIN
NC
NC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
•
Require Only Four External Components
(Fixed Versions) and Use Readily Available
Standard Inductors
OUTPUT
NC
GND
GND
NC
GND
•
•
52-kHz (Typ) Fixed-Frequency Internal
Oscillator
NC
FEEDBACK
NC
NC
TTL Shutdown Capability With 50-µA (Typ)
ON/OFF
Standby Current
NC − No internal connection
•
•
High Efficiency…as High as 88% (Typ)
KV (TO-220 STAGGERED LEADS) PACKAGE
Thermal Shutdown and Current-Limit
Protection With Cycle-by-Cycle Current
Limiting
(TOP VIEW)
(SIDE VIEW)
5
ON/OFF
FEEDBACK
GND
OUTPUT
VIN
4
3
2
1
APPLICATIONS
•
Simple High-Efficiency Step-Down (Buck)
Regulators
•
•
•
Pre-Regulators for Linear Regulators
On-Card Switching Regulators
Positive-to-Negative Converters (Buck-Boost)
Pins 1, 3, 5
Pins 2, 4
DESCRIPTION/ORDERING INFORMATION
The TL2575 and TL2575HV greatly simplify the design of switching power supplies by conveniently providing all
the active functions needed for a step-down (buck) switching regulator in an integrated circuit. Accepting a wide
input voltage range of up to 60 V (HV version) and available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, or
an adjustable-output version, the TL2575 and TL2575HV have an integrated switch capable of delivering 1 A of
load current, with excellent line and load regulation. The device also offers internal frequency compensation, a
fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown. In addition, a manual shutdown
is available via an external ON/OFF pin.
The TL2575 and TL2575HV represent superior alternatives to popular three-terminal linear regulators. Due to
their high efficiency, the devices significantly reduce the size of the heatsink and, in many cases, no heatsink is
required. Optimized for use with standard series of inductors available from several different manufacturers, the
TL2575 and TL2575HV greatly simplify the design of switch-mode power supplies by requiring a minimal
addition of only four to six external components for operation.
The TL2575 and TL2575HV are characterized for operation over the virtual junction temperature range of –40°C
to 125°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.
PowerPAD, PowerFLEX are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
ORDERING INFORMATION(1)
TL2575 (VIN(MAX) = 40 V)
VO
(NOM)
TJ
PACKAGE(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
PDIP – N
Tube of 25
TL2575-33IN
TL2575-33IN
TL2575-33I
TL2575-33I
TL2575-05IN
TL2575-05I
TL2575-05I
TL2575-12IN
TL2575-12I
TL2575-12I
TL2575-15IN
TL2575-15I
TL2575-15I
TL2575-ADJIN
TL2575ADJI
TL2575ADJI
3.3 V
TO-263 – KTT
TO-220 – KV
PDIP – N
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
TL2575-33IKTTR
TL2575-33IKV
TL2575-05IN
5 V
12 V
15 V
ADJ
TO-263 – KTT
TO-220 – KV
PDIP – N
TL2575-05IKTTR
TL2575-05IKV
TL2575-12IN
–40°C to 125°C
TO-263 – KTT
TO-220 – KV
PDIP – N
TL2575-12IKTTR
TL2575-12IKV
TL2575-15IN
TO-263 – KTT
TO-220 – KV
PDIP – N
TL2575-15IKTTR
TL2575-15IKV
TL2575-ADJIN
TL2575-ADJIKTTR
TL2575-ADJIKV
TO-263 – KTT
TO-220 – KV
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
ORDERING INFORMATION(1)
TL2575HV (VIN(MAX) = 60 V)
VO
(NOM)
TJ
PACKAGE(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
PDIP – N
Tube of 25
TL2575HV-33IN
TL2575HV-33IN
2BHV-33I
3.3 V
TO-263 – KTT
TO-220 – KV
PDIP – N
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
Tube of 25
Reel of 500
Tube of 50
TL2575HV-33IKTTR
TL2575HV-33IKV
TL2575HV-05IN
TL2575HV-33I
TL2575HV-05IN
2BHV-05I
5 V
12 V
15 V
ADJ
TO-263 – KTT
TO-220 – KV
PDIP – N
TL2575HV-05IKTTR
TL2575HV-05IKV
TL2575HV-12IN
TL2575HV-05I
TL2575HV-12IN
2BHV-12I
–40°C to 125°C
TO-263 – KTT
TO-220 – KV
PDIP – N
TL2575HV-12IKTTR
TL2575HV-12IKV
TL2575HV-15IN
TL2575HV-12I
TL2575HV-15IN
2BHV-15I
TO-263 – KTT
TO-220 – KV
PDIP – N
TL2575HV-15IKTTR
TL2575HV-15IKV
TL2575HV-ADJIN
TL2575HV-ADJIKTTR
TL2575HV-ADJIKV
TL2575HV-15I
TL2575HV-ADJIN
2BHV-ADJI
TO-263 – KTT
TO-220 – KV
TL2575HVADJI
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
2
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
FUNCTIONAL BLOCK DIAGRAM
V
IN
ON/OFF
5
Internal
Regulator
Unregulated
DC Input
On/Off
1
+
C
IN
FEEDBACK
4
Fixed-Gain
Error Amplifier
R2
1-A
Switch
Comparator
+
_
Driver
+
_
R1
1 kW
L1
V
OUT
OUTPUT
2
+
D1
C
OUT
L
O
A
D
GND
3
1.23-V
Band-Gap
Reference
52-kHz
Oscillator
Thermal
Shutdown
Current
Limit
Reset
3.3 V: R2 = 1.7 kW
5 V: R2 = 3.1 kW
12 V: R2 = 8.84 kW
15 V: R2 = 11.3 kW
ADJ: R1 = Open, R2 = 0 Ω
A. Pin numbers are for the KTT (TO-263) package.
FEEDBACK
4
7-V to 40-V
Unregulated
DC Input
5-V
Regulated
Output
+V
TL2575-05
IN
L1
L2
OUTPUT
2
1
330 µH
20 µH
1-A Load
3
GND
5
ON/OFF
+
+
+
C
C
C1
100 µF
IN
OUT
D1
1N5819
100 µF
330 µF
Optional Output Ripple Filter
A. Pin numbers are for the KTT (TO-263) package.
Figure 1. Typical Application Circuit (Fixed Version)
3
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
Absolute Maximum Ratings(1)
over operating free-air temperature range (unless otherwise noted)
MIN
–0.3
–65
MAX UNIT
TL2575HV
60
V
VIN
Supply voltage
TL2575
42
ON/OFF input voltage range
Output voltage to GND (steady state)
Maximum junction temperature
Storage temperature range
VIN
–1
V
V
TJ
150
150
°C
°C
Tstg
(1) 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.
Package Thermal Data(1)
(2)
PACKAGE
PDIP (N)
BOARD
θJA
θJC
θJP
High K, JESD 51-7
High K, JESD 51-5
High K, JESD 51-5
67°C/W
26.5°C/W
26.5°C/W
57°C/W
31.8°C/W
31.8°C/W
TO-263 (KTT)
TO-220 (KV)
0.38°C/W
0.38°C/W
(1) 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.
(2) For packages with exposed thermal pads, such as QFN, PowerPAD™, or PowerFLEX™, θJP is defined as the thermal resistance
between the die junction and the bottom of the exposed pad.
Recommended Operating Conditions
MIN
4.75
4.75
–40
MAX UNIT
TL2575HV
TL2575
60
V
VIN
TJ
Supply voltage
40
Operating virtual junction temperature
125
°C
4
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
TL2575 Electrical Characteristics
ILOAD = 200 mA, VIN = 12 V for 3.3-V, 5-V, and adjustable versions, VIN = 25 V for 12-V version, VIN = 30 V for 15-V version
(unless otherwise noted) (see Figure 2)
TL2575
PARAMETER
TEST CONDITIONS
TJ
UNIT
MIN
3.234
3.168
3.135
4.9
TYP
3.3
MAX
3.366
3.432
3.465
5.1
VIN = 12 V, ILOAD = 0.2 A
25°C
25°C
TL2575-33
TL2575-05
TL2575-12
TL2575-15
3.3
4.75 V ≤ VIN ≤ 40 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
25°C
VIN = 12 V, ILOAD = 0.2 A
5
5
25°C
4.8
5.2
8 V ≤ VIN ≤ 40 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
25°C
4.75
5.25
VOUT
Output voltage
V
VIN = 25 V, ILOAD = 0.2 A
11.76
11.52
11.4
12
12
12.24
12.48
12.6
25°C
15 V ≤ VIN ≤ 40 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
25°C
VIN = 30 V, ILOAD = 0.2 A
14.7
15
15
15
15.3
25°C
14.4
15.6
18 V ≤ VIN ≤ 40 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
14.25
15.75
VIN = 12 V, VOUT = 5 V,
ILOAD = 0.2 A
25°C
1.217
1.23
1.23
1.243
Feedback voltage TL2575-ADJ
V
25°C
1.193
1.18
1.267
1.28
8 V ≤ VIN ≤ 40 V, VOUT = 5 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
TL2575-33
TL2575-05
VIN = 12 V, ILOAD = 1 A
VIN = 12 V, ILOAD = 1 A
VIN = 15 V, ILOAD = 1 A
VIN = 18 V, ILOAD = 1 A
75
77
88
88
TL2575-12
η
Efficiency
25°C
%
TL2575-15
VIN = 12 V, VOUT = 5 V,
ILOAD = 1 A
TL2575-ADJ
77
50
25°C
Full range
25°C
100
500
58
IIB
Feedback bias current
Oscillator frequency(1)
VOUT = 5 V (ADJ version only)
nA
47
42
52
fo
kHz
Full range
25°C
63
0.9
1.2
1.4
VSAT
Saturation voltage
IOUT = 1 A(2)
V
%
A
Full range
25°C
Maximum duty cycle(3)
Switch peak current(1)(2)
93
1.7
1.3
98
25°C
2.8
3.6
4
ICL
Full range
VIN = 40(4), Output = 0 V
VIN = 40(4), Output = –1 V
2
IL
Output leakage current
25°C
mA
7.5
5
30
10
200
IQ
Quiescent current(4)
25°C
25°C
mA
ISTBY
Standby quiescent current
OFF (ON/OFF = 5 V)
50
µA
(1) In the event of an output short or an overload condition, self-protection features lower the oscillator frequency to 18 kHz and the
minimum duty cycle from 5% to 2%. The resulting output voltage drops to 40% of its nominal value, causing the average power
dissipated by the IC to lower.
(2) Output is not connected to diode, inductor, or capacitor. Output is sourcing current.
(3) FEEDBACK is disconnected from output and connected to 0 V.
(4) To force the output transistor off, FEEDBACK is disconnected from output and connected to 12 V for the adjustable, 3.3-V, and 5-V
versions and to 25 V for the 12-V and 15-V versions.
5
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
TL2575 Electrical Characteristics (continued)
ILOAD = 200 mA, VIN = 12 V for 3.3-V, 5-V, and adjustable versions, VIN = 25 V for 12-V version, VIN = 30 V for 15-V version
(unless otherwise noted) (see Figure 2)
TL2575
PARAMETER
TEST CONDITIONS
TJ
UNIT
V
MIN
2.2
TYP
MAX
25°C
Full range
25°C
1.4
ON/OFF high-level logic
input voltage
VIH
VIL
OFF (VOUT = 0 V)
2.4
1.2
1
0.8
30
ON/OFF low-level logic
input voltage
ON (VOUT = nominal voltage)
V
Full range
25°C
IIH
IIL
ON/OFF high-level input current
ON/OFF low-level input current
OFF (ON/OFF = 5 V)
ON (ON/OFF = 0 V)
12
0
µA
µA
25°C
10
6
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
TL2575HV Electrical Characteristics
ILOAD = 200 mA, VIN = 12 V for 3.3-V, 5-V, and adjustable versions, VIN = 25 V for 12-V version, VIN = 30 V for 15-V version
(unless otherwise noted) (see Figure 2)
TL2575HV
PARAMETER
TEST CONDITIONS
TJ
UNIT
MIN
3.234
3.168
3.135
4.9
TYP
3.3
MAX
3.366
3.450
3.482
5.1
VIN = 12 V, ILOAD = 0.2 A
25°C
25°C
TL2575HV-33
TL2575HV-05
TL2575HV-12
TL2575HV-15
3.3
4.75 V ≤ VIN ≤ 60 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
25°C
VIN = 12 V, ILOAD = 0.2 A
5
5
25°C
4.8
5.225
5.275
12.24
12.54
12.66
15.3
8 V ≤ VIN ≤ 60 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
25°C
4.75
VOUT
Output voltage
V
VIN = 25 V, ILOAD = 0.2 A
11.76
11.52
11.4
12
12
25°C
15 V ≤ VIN ≤ 60 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
25°C
VIN = 30 V, ILOAD = 0.2 A
14.7
15
15
15
25°C
14.4
15.68
15.83
18 V ≤ VIN ≤ 60 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
14.25
VIN = 12 V, VOUT = 5 V,
ILOAD = 0.2 A
25°C
1.217
1.23
1.23
1.243
Feedback voltage TL2575HV-ADJ
V
25°C
1.193
1.180
1.273
1.286
8 V ≤ VIN ≤ 60 V, VOUT = 5 V,
0.2 A ≤ ILOAD ≤ 1 A
Full range
TL2575HV-33
TL2575HV-05
VIN = 12 V, ILOAD = 1 A
VIN = 12 V, ILOAD = 1 A
VIN = 15 V, ILOAD = 1 A
VIN = 18 V, ILOAD = 1 A
75
77
88
88
TL2575HV-12
η
Efficiency
25°C
%
TL2575HV-15
VIN = 12 V, VOUT = 5 V,
ILOAD = 1 A
TL2575HV-ADJ
77
50
25°C
Full range
25°C
100
500
58
IIB
Feedback bias current
Oscillator frequency(1)
VOUT = 5 V (ADJ version only)
nA
47
42
52
fo
kHz
Full range
25°C
63
0.9
1.2
1.4
VSAT
Saturation voltage
IOUT = 1 A(2)
V
%
A
Full range
25°C
Maximum duty cycle(3)
Switch peak current(1)(2)
93
1.7
1.3
98
25°C
2.8
3.6
4
ICL
Full range
VIN = 60(4), Output = 0 V
VIN = 60(4), Output = –1 V
2
IL
Output leakage current
25°C
mA
7.5
5
30
10
200
IQ
Quiescent current(4)
25°C
25°C
mA
ISTBY
Standby quiescent current
OFF (ON/OFF = 5 V)
50
µA
(1) In the event of an output short or an overload condition, self-protection features lower the oscillator frequency to 18 kHz and the
minimum duty cycle from 5% to 2%. The resulting output voltage drops to 40% of its nominal value, causing the average power
dissipated by the IC to lower.
(2) Output is not connected to diode, inductor, or capacitor. Output is sourcing current.
(3) FEEDBACK is disconnected from output and connected to 0 V.
(4) To force the output transistor off, FEEDBACK is disconnected from output and connected to 12 V for the adjustable, 3.3-V, and 5-V
versions and to 25 V for the 12-V and 15-V versions.
7
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
TL2575HV Electrical Characteristics (continued)
ILOAD = 200 mA, VIN = 12 V for 3.3-V, 5-V, and adjustable versions, VIN = 25 V for 12-V version, VIN = 30 V for 15-V version
(unless otherwise noted) (see Figure 2)
TL2575HV
PARAMETER
TEST CONDITIONS
TJ
UNIT
V
MIN
2.2
TYP
MAX
25°C
Full range
25°C
1.4
ON/OFF high-level logic
input voltage
VIH
VIL
OFF (VOUT = 0 V)
2.4
1.2
1
0.8
30
ON/OFF low-level logic input voltage ON (VOUT = nominal voltage)
V
Full range
IIH
IIL
ON/OFF high-level input current
ON/OFF low-level input current
OFF (ON/OFF = 5 V)
ON (ON/OFF = 0 V)
12
0
µA
µA
25°C
10
8
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
www.ti.com
SLVS638B–MAY 2006–REVISED JANUARY 2007
TEST CIRCUITS
Fixed-Output Voltage
FEEDBACK
4
+V
IN
TL2575-xx
L1
Fixed Output
V
OUT
OUTPUT
2
1
330 µH
V
IN
3
GND
5 ON/OFF
L
D1
+
Unregulated
DC Input
C
IN
O
A
D
+
C
100 µF
OUT
330 µF
C
C
= 100 µF, Aluminum Electrolytic
IN
= 330 µF, Aluminum Electrolytic
OUT
D1 = Schottky
L1 = 330 µH (for 5-V V with 3.3-V V
, use 100 mH)
OUT
IN
Adjustable-Output Voltage
FEEDBACK
4
+V
IN
TL2575
(ADJ)
L1
OUTPUT
2
V
OUT
1
330 µH
R2
R1
7-V to 40-V
Unregulated
DC Input
D1
11DQ06
3
GND
5
ON/OFF
L
+
C
IN
100 µF
O
A
D
+
C
OUT
330 µF
V
V
= V
(1 + R2/R1) = 5 V
OUT
REF
= 1.23 V
REF
R1 = 2 kW
R2 = 6.12 kW
A. Pin numbers are for the KTT (TO-263) package.
Figure 2. Test Circuits and Layout Guidelines
9
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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
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SLVS638B–MAY 2006–REVISED JANUARY 2007
TYPICAL CHARACTERISTICS
1
0.8
0.6
0.4
0.2
0
1.4
1.2
1
VIN = 20 V
ILOAD = 200 mA
TJ = 25°C
ILOAD = 200 mA
TJ = 25°C
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
-0.2
-0.4
-0.6
0
10
20
30
40
50
60
-50 -25
0
25
50
75
100 125 150
VIN – Input Voltage – V
TA – Temperature – °C
Figure 3. Normalized Output Voltage
Figure 4. Line Regulation
2
3
2.5
2
DVOUT = 5%
RIND = 0.2 W
1.75
1.5
1.25
1
ILOAD = 1 A
1.5
1
0.75
0.5
0.25
0
ILOAD = 200 mA
0.5
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
-50
-25
0
25
50
75
100 125 150
TJ – Junction Temperature – °C
TJ – Junction Temperature – °C
Figure 5. Dropout Voltage
Figure 6. Current Limit
10
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1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
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SLVS638B–MAY 2006–REVISED JANUARY 2007
TYPICAL CHARACTERISTICS (continued)
20
18
16
14
12
10
8
500
VON/OFF = 5 V
VOUT = 5 V
450
TJ = 25°C
VIN = 40 V
400
350
300
250
200
150
100
50
Measured at GND pin
ILOAD = 1 A
6
ILOAD = 0.2 A
4
VIN = 12 V
2
0
0
0
10
20
30
40
50
60
-50 -25
0
25
50
75 100 125 150
VIN – Input Voltage – V
TJ – Junction Temperature – °C
Figure 7. Quiescent Current
Figure 8. Standby Quiescent Current
10
8
1.2
1.1
1
Normalized at TJ = 25°C
6
VIN = 12 V
4
TJ = –40°C
0.9
0.8
0.7
0.6
0.5
0.4
2
VIN = 40 V
0
-2
TJ = 25°C
-4
-6
TJ = 125°C
-8
-10
-50
-25
0
25
50
75
100 125 150
0
0.2
0.4
0.6
0.8
1
TJ – Junction Temperature – °C
ISW – Switch Current – A
Figure 9. Oscillator Frequency
Figure 10. Switch Saturation Voltage
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TYPICAL CHARACTERISTICS (continued)
5
4.5
4
100
90
Adjustable version only
Adjustable version only
80
70
60
3.5
3
50
40
30
2.5
2
20
10
0
1.5
1
-10
-20
-30
-40
-50
0.5
0
-50 -25
0
25
50
75
100 125 150
-50
-25
0
25
50
75
100 125 150
TJ – Junction Temperature – °C
TJ – Junction Temperature – °C
Figure 11. Minimum Operating Voltage
Figure 12. FEEDBACK Current
VOUT = 5 V
A
{
0 V
B
{
0 A
C
{
D
0 A
{
4 µs/Div
A. Output pin voltage, 10 V/Div
B. Output pin current, 1 A/Div
C. Inductor current, 0.5 A/Div
D. Ouput ripple voltage, 20 mV/Div
Figure 13. Switching Waveforms
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TYPICAL CHARACTERISTICS (continued)
0.2
0.15
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
t – Time – ms
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
t – Time – ms
Figure 14. Load Transient Response
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APPLICATION INFORMATION
Input Capacitor (CIN)
For stability concerns, an input bypass capacitor (electrolytic, CIN ≥ 47 µF) needs to be located as close as
possible to the regulator. For operating temperatures below –25°C, CIN may need to be larger in value. In
addition, since most electrolytic capacitors have decreasing capacitances and increasing ESR as temperature
drops, adding a ceramic or solid tantalum capacitor in parallel increases the stability in cold temperatures.
To extend the capacitor operating lifetime, the capacitor RMS ripple current rating should be:
IC,RMS > 1.2(ton/T)ILOAD
where
ton/T = VOUT/VIN {buck regulator} and
ton/T = |VOUT|/(|VOUT| + VIN) {buck-boost regulator}
Output Capacitor (COUT
)
For both loop stability and filtering of ripple voltage, an output capacitor also is required, again in close proximity
to the regulator. For best performance, low-ESR aluminum electrolytics are recommended, although standard
aluminum electrolytics may be adequate for some applications. Based on the following equation:
Output ripple voltage = (ESR of COUT) × (inductor ripple current)
Output ripple of 50 mV to 150 mV typically can be achieved with capacitor values of 220 µF to 680 µF. Larger
COUT can reduce the ripple 20 mV to 50 mV peak to peak. To improve further on output ripple, paralleling of
standard electrolytic capacitors may be used. Alternatively, higher-grade capacitors such as high frequency, low
inductance, or low ESR can be used.
The following should be taken into account when selecting COUT
:
•
At cold temperatures, the ESR of the electrolytic capacitors can rise dramatically (typically 3× nominal value
at –25°C). Because solid tantalum capacitors have significantly better ESR specifications at cold
temperatures, they should be used at operating temperature lower than –25°C. As an alternative, tantalums
also can be paralleled to aluminum electrolytics and should contribute 10% to 20% to the total capacitance.
•
•
Low ESR for COUT is desirable for low output ripple. However, the ESR should be greater than 0.05 Ω to
avoid the possibility of regulator instability. Hence, a sole tantalum capacitor used for COUT is most
susceptible to this occurrence.
The capacitor’s ripple current rating of 52 kHz should be at least 50% higher than the peak-to-peak inductor
ripple current.
Catch Diode
As with other external components, the catch diode should be placed close to the output to minimize unwanted
noise. Schottky diodes have fast switching speeds and low forward voltage drops and, thus, offer the best
performance, especially for switching regulators with low output voltages (VOUT < 5 V). If a high-efficiency,
fast-recovery, or ultra-fast-recovery diode is used in place of a Schottky, it should have a soft recovery (versus
abrupt turn-off characteristics) to avoid the chance of causing instability and EMI. Standard 50-/60-Hz diodes,
such as the 1N4001 or 1N5400 series, are not suitable.
14
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APPLICATION INFORMATION (continued)
Inductor
Proper inductor selection is key to the performance-switching power-supply designs. One important factor to
consider is whether the regulator is used in continuous mode (inductor current flows continuously and never
drops to zero) or in discontinuous mode (inductor current goes to zero during the normal switching cycle). Each
mode has distinctively different operating characteristics and, therefore, can affect the regulator performance
and requirements. In many applications, the continuous mode is the preferred mode of operation, since it offers
greater output power with lower peak currents, and also can result in lower output ripple voltage. The
advantages of continuous mode of operation come at the expense of a larger inductor required to keep inductor
current continuous, especially at low output currents and/or high input voltages.
The TL2575 and TL2575HV can operate in either continuous or discontinuous mode. With heavy load currents,
the inductor current flows continuously and the regulator operates in continuous mode. Under light load, the
inductor fully discharges and the regulator is forced into the discontinuous mode of operation. For light loads
(approximately 200 mA or less), this discontinuous mode of operation is perfectly acceptable and may be
desirable solely to keep the inductor value and size small. Any buck regulator eventually operates in
discontinuous mode when the load current is light enough.
The type of inductor chosen can have advantages and disadvantages. If high performance/quality is a concern,
then more-expensive toroid core inductors are the best choice, as the magnetic flux is contained completely
within the core, resulting in less EMI and noise in nearby sensitive circuits. Inexpensive bobbin core inductors,
however, generate more EMI as the open core does not confine the flux within the core. Multiple switching
regulators located in proximity to each other are particularly susceptible to mutual coupling of magnetic fluxes
from each other’s open cores. In these situations, closed magnetic structures (such as a toroid, pot core, or
E-core) are more appropriate.
Regardless of the type and value of inductor used, the inductor never should carry more than its rated current.
Doing so may cause the inductor to saturate, in which case the inductance quickly drops, and the inductor looks
like a low-value resistor (from the dc resistance of the windings). As a result, switching current rises dramatically
(until limited by the current-by-current limiting feature of the TL2575 and TL2575HV) and can result in
overheating of the inductor and the IC itself. Note that different types of inductors have different saturation
characteristics.
Output Voltage Ripple and Transients
As with any switching power supply, the output of the TL2575 and TL2575HV have a sawtooth ripple voltage at
the switching frequency. Typically about 1% of the output voltage, this ripple is due mainly to the inductor
sawtooth ripple current and the ESR of the output capacitor (see note on COUT). Furthermore, the output also
may contain small voltage spikes at the peaks of the sawtooth waveform. This is due to the fast switching of the
output switch and the parasitic inductance of COUT. These voltage spikes can be minimized through the use of
low-inductance capacitors.
There are several ways to reduce the output ripple voltage: a larger inductor, a larger COUT, or both. Another
method is to use a small LC filter (20 µH and 100 µF) at the output. This filter can reduce the output ripple
voltage by a factor of 10 (see Figure 2).
Feedback Connection
For fixed-voltage options, FEEDBACK must be wired to VOUT. For the adjustable version, FEEDBACK must be
connected between the two programming resistors. Again, both of these resistors should be in close proximity to
the regulator, and each should be less than 100 kΩ to minimize noise pickup.
ON/OFF Input
ON/OFF should be grounded or be a low-level TTL voltage (typically <1.6 V) for normal operation. To shut down
the TL2575 or TL2575HV and put it in standby mode, a high-level TTL or CMOS voltage should be supplied to
this pin. ON/OFF should not be left open and safely can be pulled up to VIN with or without a pullup resistor.
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APPLICATION INFORMATION (continued)
Grounding
The power and ground connections of the TL2575 and TL2575HV must be low impedance to help maintain
output stability. For the 5-pin packages, both pin 3 and tab are ground, and either connection can be used as
they are both part of the same lead frame. With the 16-pin package, all the ground pins (including signal and
power grounds) should be soldered directly to wide PCB copper traces to ensure low-inductance connections
and good thermal dissipation.
Layout Guidelines
With any switching regulator, circuit layout plays an important role in circuit performance. Wiring and parasitic
inductances, as well as stray capacitances, are subjected to rapidly switching currents, which can result in
unwanted voltage transients. To minimize inductance and ground loops, the length of the leads indicated by
heavy lines should be minimized. Optimal results can be achieved by single-point grounding (see Figure 2) or by
ground-plane construction. For the same reasons, the two programming resistors used in the adjustable version
should be located as close as possible to the regulator to keep the sensitive feedback wiring short.
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BUCK REGULATOR DESIGN PROCEDURE
PROCEDURE (Fixed Output)
EXAMPLE (Fixed Output)
Known:
Known:
VOUT = 3.3 V, 5 V, 12 V, or 15 V
VIN(Max) = Maximum input voltage
ILOAD(Max) = Maximum load current
VOUT = 5 V
VIN(Max) = 20 V
ILOAD(Max) = 1 A
1. Inductor Selection (L1)
1. Inductor Selection (L1)
A. From Figure 15 through Figure 18, select the appropriate inductor A. From Figure 16 (TL2575-05), the intersection of 20-V line and
code based on the intersection of VIN(Max) and ILOAD(Max)
.
1-A line gives an inductor code of L330.
B. From Table 2, choose the appropriate inductor based on the
inductor code. Parts from three well-known inductor manufacturers
are given. The inductor chosen should be rated for operation at
52-kHz and have a current rating of at least 1.15 × ILOAD(Max) to
allow for the ripple current. The actual peak current in L1 (in normal
operation) can be calculated as follows:
B. L330 → L1 = 330 µH
Choose from:
34042 (Schott)
PE-52627 (Pulse Engineering)
RL1952 (Renco)
IL1(pk) = ILOAD(Max) + (VIN – VOUT) × ton/2L1
Where ton = VOUT/VIN× (1/fosc
)
2. Output Capacitor Selection (COUT
)
2. Output Capacitor Selection (COUT
)
A. The TL2575 control loop has a two-pole two-zero frequency
response. The dominant pole-zero pair is established by COUT and
L1. To meet stability requirements while maintaining an acceptable
output ripple voltage (Vripple ≈ 0.01 × VOUT), the recommended range
for a standard aluminum electrolytic COUT is between 100 µF and
470 µF.
A. COUT = 100-µF to 470-µF, standard aluminum electrolytic
B. COUT should have a voltage rating of at least 1.5 × VOUT. But if a B. Although a COUT rated at 8 V is sufficient for VOUT = 5 V, a
low output ripple voltage is desired, choose capacitors with a
higher-voltage ratings than the minimum required, due to their
typically lower ESRs.
higher-voltage capacitor is chosen for its typically lower ESR (and
hence lower output ripple voltage) → Capacitor voltage
rating = 20 V.
3. Catch Diode Selection (D1) (see Table 1)
3. Catch Diode Selection (D1) (see Table 1)
A. In normal operation, the catch diode requires a current rating of
at least 1.2 × ILOAD(Max). For the most robust design, D1 should be
rated to handle a current equal to the TL2575 maximum switch peak
current; this represents the worst-case scenario of a continuous
A. Pick a diode with 3-A rating.
short at VOUT
.
B. The diode requires a reverse voltage rating of at least
B. Pick 30-V rated Schottky diode (1N5821, MBR330, 31QD03, or
SR303) or 100-V rated Fast Recovery diode (31DF1, MURD310, or
HER302).
1.25 × VIN(Max)
.
4. Input Capacitor (CIN
)
4. Input Capacitor (CIN
)
An aluminum electrolytic or tantalum capacitor is needed for input
bypassing. Locate CIN as close to the VIN and GND pins as
possible.
CIN = 100 µF, 25 V, aluminum electrolytic
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PROCEDURE (Adjustable Output)
EXAMPLE (Adjustable Output)
Known:
Known:
VOUT(Nom)
VOUT = 10 V
VIN(Max) = 25 V
ILOAD(Max) = 1 A
VIN(Max) = Maximum input voltage
ILOAD(Max) = Maximum load current
1. Programming Output Voltage (Selecting R1 and R2)
1. Programming Output Voltage (Selecting R1 and R2)
Select R1 = 1 kΩ
Referring to Fig. 2, VOUT is defined by:
R2
R2 = 1 (10/1.23 – 1) = 7.13 kΩ
VOUT = VREF
where VREF = 1.23 V
1 +
(
R1
Select R2 = 7.15 kΩ (closest 1% value)
Choose a value for R1 between 1 kΩ and 5 kΩ (use 1% metal-film
resistors for best temperature coefficient and stability over time).
VOUT
R2 = R1
– 1
(
VREF
2. Inductor Selection (L1)
2. Inductor Selection (L1)
A. Calculate the "set" volts-second (E•T) across L1:
E•T = (VIN – VOUT) × ton
A. Calculate the "set" volts-second (E•T) across L1:
E•T = (25 – 10) × (10/25) × (1000/52) [V•µs]
E•T = 115 V•µs
E•T = (VIN – VOUT) × (VOUT/VIN) × {1000/fosc(in kHz)} [V•µs]
NOTE: Along with ILOAD, the "set" volts-second (E•T) constant
establishes the minimum energy storage requirement for the
inductor.
B. Using Figure 19, select the appropriate inductor code based on
B. Using Figure 19, the intersection of 115 V•µs and 1 A
the intersection of E•T value and ILOAD(Max)
.
corresponds to an inductor code of H470.
C. From Table 2, choose the appropriate inductor based on the
inductor code. Parts from three well-known inductor manufacturers
are given. The inductor chosen should be rated for operation at
52-kHz and have a current rating of at least 1.15 x ILOAD(Max) to
allow for the ripple current. The actual peak current in L1 (in normal
operation) can be calculated as follows:
C. H470 → L1 = 470 µF
Choose from:
34048 (Schott)
PE-53118 (Pulse Engineering)
RL1961 (Renco)
IL1(pk) = ILOAD(Max) + (VIN – VOUT) × ton/2L1
Where ton = VOUT/VIN × (1/fosc
)
3. Output Capacitor Selection (COUT
)
3. Output Capacitor Selection (COUT)
A. The TL2575 control loop has a two-pole two-zero frequency
response. The dominant pole-zero pair is established by COUT and
L1. To meet stability requirements, COUT must meet the following
A.COUT ≥ 7785 × 25/(10 × 470) [µF]
COUT ≥ 41.4 µF
To obtain an acceptable output voltage ripple →
COUT = 220 µF electrolytic
requirement:
VIN(Max)
COUT ³ 7758
(µF)
V
OUT · L1(µH)
However, COUT may need to be several times larger than the
calculated value above in order to achieve an acceptable output
ripple voltage of ~0.01 × VOUT
.
B. COUT should have a voltage rating of at least 1.5 × VOUT. But if a
low output ripple voltage is desired, choose capacitors with a higher
voltage ratings than the minimum required due to their typically
lower ESRs.
4. Catch Diode Selection (D1) (see Table 1)
4. Catch Diode Selection (D1) (see Table 1)
A. In normal operation, the catch diode requires a current rating of
at least 1.2 × ILOAD(Max). For the most robust design, D1 should be
rated for a current equal to the TL2575 maximum switch peak
current; this represents the worst-case scenario of a continuous
A. Pick a diode with a 3-A rating.
short at VOUT
.
B. The diode requires a reverse voltage rating of at least
B. Pick a 40-V rated Schottky diode (1N5822, MBR340, 31QD04, or
SR304) or 100-V rated Fast Recovery diode (31DF1, MURD310, or
HER302)
1.25 × VIN(Max)
.
5. Input Capacitor (CIN
)
5. Input Capacitor (CIN
)
An aluminum electrolytic or tantalum capacitor is needed for input
bypassing. Locate CIN as close to VIN and GND pins as possible.
CIN = 100 µF, 35 V, aluminum electrolytic
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Inductor Value Selection Guide for Continuous-Mode Operation
Figure 15. TL2575-33
Figure 16. TL2575-50
Figure 17. TL2575-12
Figure 18. TL2575-15
Figure 19. TL2575-ADJ
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Table 1. Diode Selection Guide
SCHOTTKY
FAST RECOVERY
VR
1A
3A
1A
3A
1N5817
MBR120P
SR102
1N5820
MBR320
SR302
20 V
1N5818
MBR130P
11DQ03
SR103
1N5821
MBR330
31DQ03
SR303
30 V
40 V
The following diodes
are all rated to 100 V: are all rated to 100 V:
The following diodes
1N5819
MBR140P
11DQ04
SR104
IN5822
MBR340
31DQ04
SR304
11DF1
MUR110
HER102
31DF1
MURD310
HER302
MBR150
11DQ05
SR105
MBR350
31DQ05
SR305
50 V
60 V
MBR160
11DQ06
SR106
MBR360
31DQ06
SR306
Table 2. Inductor Selection by Manufacturer's Part Number
INDUCTOR VALUE
SCHOTT
RENCO
INDUCTOR CODE
PULSE ENGINEERING(2)
(µH)
CORPORATION(1)
ELECTRONICS(3)
RL2444
RL1954
RL1953
RL1952
RL1951
RL1950
RL2445
RL2446
RL2447
RL1961
RL1960
RL1959
RL1958
RL2448
L100
L150
100
150
220
330
470
680
150
220
330
470
680
1000
1500
2200
67127000
67127010
67127020
67127030
67127040
67127050
67127060
67127070
67127080
67127090
67127100
67127110
67127120
67127130
PE-92108
PE-53113
PE-52626
PE-52627
PE-53114
PE-52629
PE-53115
PE-53116
PE-53117
PE-53118
PE-53119
PE-53120
PE-53121
PE-53122
L220
L330
L470
L680
H150
H220
H330
H470
H680
H1000
H1500
H2200
(1) Schott Corporation, (612) 475-1173, 1000 Parkers Lake Rd., Wayzata, MN 55391
(2) Pulse Engineering, (619) 674-8100, P.O. Box 12236, San Diego, CA 92112
(3) Renco Electronics Inc., (516) 586-5566, 60 Jeffryn Blvd. East, Deer Park, NY 11729
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PACKAGE OPTION ADDENDUM
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24-Jan-2007
PACKAGING INFORMATION
Orderable Device
TL2575-05IKTTR
TL2575-05IKV
Status (1)
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
DDPAK/
TO-263
KTT
5
500 Green (RoHS &
no Sb/Br)
CU SN
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
TO-220
KV
N
5
50
Pb-Free
(RoHS)
CU SN
TL2575-05IN
PDIP
16
5
25
Pb-Free
(RoHS)
CU NIPD
CU SN
TL2575-12IKTTR
TL2575-12IKV
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
25
25
Pb-Free
(RoHS)
CU SN
TL2575-12IN
PDIP
16
16
5
Pb-Free
(RoHS)
CU NIPD
CU NIPD
CU SN
TL2575-12INE4
TL2575-15IKTTR
TL2575-15IKV
PDIP
N
Pb-Free
(RoHS)
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
25
25
Pb-Free
(RoHS)
CU SN
TL2575-15IN
PDIP
16
16
5
Pb-Free
(RoHS)
CU NIPD
CU NIPD
CU SN
TL2575-15INE4
TL2575-33IKTTR
TL2575-33IKV
PDIP
N
Pb-Free
(RoHS)
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
Pb-Free
(RoHS)
CU SN
TL2575-33IN
PDIP
16
5
25
Pb-Free
(RoHS)
CU NIPD
CU SN
TL2575-ADJIKTTR
TL2575-ADJIKV
TL2575-ADJIN
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
25
25
Pb-Free
(RoHS)
CU SN
PDIP
16
16
5
Pb-Free
(RoHS)
CU NIPD
CU NIPD
CU SN
TL2575-ADJINE4
TL2575HV-05IKTTR
TL2575HV-05IKV
TL2575HV-05IN
TL2575HV-05INE4
TL2575HV-12IKTTR
TL2575HV-12IKV
TL2575HV-12IN
PDIP
N
Pb-Free
(RoHS)
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
25
25
Pb-Free
(RoHS)
CU SN
PDIP
16
16
5
Pb-Free
(RoHS)
CU NIPD
CU NIPD
CU SN
PDIP
N
Pb-Free
(RoHS)
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
Pb-Free
(RoHS)
CU SN
PDIP
16
25
Pb-Free
(RoHS)
CU NIPD
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
24-Jan-2007
Orderable Device
TL2575HV-12INE4
TL2575HV-15IKTTR
TL2575HV-15IKV
TL2575HV-15IN
Status (1)
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
PDIP
N
16
25
Pb-Free
(RoHS)
CU NIPD
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
Level-3-245C-168 HR
N / A for Pkg Type
N / A for Pkg Type
N / A for Pkg Type
DDPAK/
TO-263
KTT
KV
N
5
500 Green (RoHS &
no Sb/Br)
CU SN
TO-220
5
50
25
25
Pb-Free
(RoHS)
CU SN
PDIP
16
16
5
Pb-Free
(RoHS)
CU NIPD
CU NIPD
CU SN
TL2575HV-15INE4
TL2575HV-33IKTTR
TL2575HV-33IKV
TL2575HV-33IN
PDIP
N
Pb-Free
(RoHS)
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
25
25
Pb-Free
(RoHS)
CU SN
PDIP
16
16
5
Pb-Free
(RoHS)
CU NIPD
CU NIPD
CU SN
TL2575HV-33INE4
TL2575HV-ADJIKTTR
TL2575HV-ADJIKV
TL2575HV-ADJIN
TL2575HV-ADJINE4
PDIP
N
Pb-Free
(RoHS)
DDPAK/
TO-263
KTT
KV
N
500 Green (RoHS &
no Sb/Br)
TO-220
5
50
25
25
Pb-Free
(RoHS)
CU SN
PDIP
16
16
Pb-Free
(RoHS)
CU NIPD
CU NIPD
PDIP
N
Pb-Free
(RoHS)
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
24-Jan-2007
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 3
IMPORTANT NOTICE
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enhancements, improvements, and other changes to its products and services at any time and to
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