TC1267 DATA SHEET (12/01/2014) DOWNLOAD

Obsolete Device
TC1267
400mA PCI LDO
Features:
General Description:
•
•
•
•
•
•
•
•
The TC1267 is an application-specific, low dropout
regulator (LDO), specifically intended for use in PCI
peripheral card applications complying with PCI Power
Management (PCI 2.0). It provides an uninterrupted,
3.3V output voltage when the main (5V) or auxiliary
(3.3V) input voltage supplies are present.
Glitch Free Transition Between Input Sources
Automatic Input Source Selection
External PMOS Bypass Switch Control
Built-in 5V Detector
1% Regulated Output Voltage Accuracy
400mA Load Current Capability
Kelvin Sense Input
Low Ground Current, Independent of Load
Applications:
•
•
•
•
•
PCMCIA
PCI
Network Interface Cards (NICs)
CardbusTM Technology
Desktop Computers
Device Selection Table
Part Number
Package
Junction
Temp. Range
TC1267VET
5-Pin DDPAK
-5°C to +95°C
Pin Configuration
The TC1267 consists of an LDO, a voltage threshold
detector, external switchover logic and gate drive
circuitry. It functions as a conventional LDO as long as
the voltage on the main supply input (VIN) is above the
lower threshold (3.90V typical). Should the voltage on
VIN fall below the lower threshold, the LDO is disabled
and an external P-channel MOSFET is automatically
turned on, connecting the auxiliary supply input to
VOUT, and ensuring an uninterrupted 3.3V output. The
main supply is automatically selected, if both the main
and auxiliary input supplies are present, and transition
from one input supply to the other is ensured glitchfree. High integration, automatic secondary supply switchover, Kelvin sensing, and small size make the
TC1267 the optimum LDO for PCI 2.0 applications.
Functional Block Diagram
VIN
VAUX
5-Pin DDPAK
Tab is GND
Detect
DR
Bandgap
Reference
TC1267
–
E/A
+
VOUT
GND
VAUX
VIN
GND
VOUT
DR
1 2 3 4 5
 2001-2014 Microchip Technology Inc.
DS20001378D-page 1
TC1267
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Supply Voltage (VIN).............. -0.5V to +7V (Max)
Auxiliary Supply Voltage (VAUX) ..... -0.5V to +7V (Max)
LDO Output Current (IOUT)................................400mA
Thermal Impedance,
Junction-to-Ambient (JA).......... 27°C/W for DDPAK
ESD Rating .......................................................... 2 KV
Operating Temperature Range (TA)........-5°C to +70°C
Storage Temperature Range (TSTG) ...-65°C to +150°C
*Stresses above 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 above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
TC1267 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = +25°C, VIN = 5V, VAUX = 3.3V, IOUT = 0.1mA, COUT = 4.7F, unless otherwise noted. Boldface
type specifications apply over full operating range.
Symbol
Parameter
Min.
Typ.
Max.
Units
Test Conditions
VIN
Supply Voltage
4.4
5.0
5.5
V
VAUX = 0V
IGND
Ground Current
—
—
230
260
450
500
A
VAUX = 0V (Note 6)
VAUX = 3.3V (Note 6)
IVIN
Reverse Leakage from
VAUX
—
-0.1
-1.0
A
VAUX = 3.5V, VIN = 0V, IOUT = 0mA
VAUX
Supply Voltage
3.0
3.3
3.6
V
IQ(AUX)
Quiescent Current
—
—
50
—
70
100
A
VIN = 0V, IOUT = 0mA
—
—
60
—
80
120
A
VIN = 5V, IOUT = 0mA
IVAUX
Reverse Leakage from VIN
—
-0.1
-1.0
A
VIN = 5.5V, VAUX = 0V, IOUT = 0mA
VTH(LO)
5V Detector
Low Threshold Voltage
—
3.75
3.90
—
—
4.05
V
VIN Falling (Notes 2, 3)
VHYST
5V Detector
Hysteresis Voltage
—
200
260
—
—
300
mV
VTH(HI)
5V Detector
High Threshold Voltage
—
4.0
4.15
—
—
4.30
V
VIN Rising (Notes 2, 3)
VOUT
LDO Output Voltage
(Notes 2, 3)
—
3.300
—
V
IOUT = 20mA
3.201
—
3.366
V
4.4V  VIN 5.5V, 0mA IOUT  400mA
3.000
—
—
V
0mA IOUT400mA (Note 4)
IOUT
Output Current
400
—
—
mA
REG(LINE)
Line Regulation
—
-0.5
0.05
—
—
+0.5
%
VIN = 4.3V to 5.5V
REG(LOAD)
Load Regulation
—
-1.5
-0.1
—
—
+0.5
%
IOUT = 0.1mA to 400mA
VDR
Drive Voltage
VIN - 0.2
VIN - 0.3
VIN - 0.1
—
—
—
V
4.3V VIN  5.5V, IDR = 200A
—
—
35
—
150
200
mV
Note
1:
2:
3:
4:
5:
6:
VIN < VTH(LO), IDR = 200A
Ensured by design.
See 5V Detect Thresholds, Figure 4-1.
Recommended source impedance for 5V supply: 0.25. This will ensure that IOUT x RSOURCE < VHYST, thus avoiding DR toggling during
5V detect threshold transitions.
In Application Circuit, Figure 3-1.
See Timing Diagram, Figure 4-2.
Ground Current is independent of ILOAD.
DS20001378D-page 2
 2001-2014 Microchip Technology Inc.
TC1267
TC1267 ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: TA = +25°C, VIN = 5V, VAUX = 3.3V, IOUT = 0.1mA, COUT = 4.7F, unless otherwise noted. Boldface
type specifications apply over full operating range.
Symbol
Parameter
Min.
Typ.
Max.
Units
Test Conditions
IDR(PK)
Peak Drive Current
7
6
—
—
—
—
mA
tDH
Drive High Delay
(Notes 1, 5)
—
—
4
—
—
8
sec
CDR = 1.2nF, VIN ramping up,
measured from VIN = VTH(HI) to VDR = 2V
tDL
Drive Low Delay
(Notes 1, 5)
—
—
0.6
—
1.5
3.0
sec
CDR = 1.2nF, VIN ramping down,
measured from VIN = VTH(LO) to VDR = 2V
Note
1:
2:
3:
4:
5:
6:
Sinking: VIN = 3.75V, VDR = 1V;
Sourcing: VIN = 4.3V, VIN – VOR = 2V
Ensured by design.
See 5V Detect Thresholds, Figure 4-1.
Recommended source impedance for 5V supply: 0.25. This will ensure that IOUT x RSOURCE < VHYST, thus avoiding DR toggling during
5V detect threshold transitions.
In Application Circuit, Figure 3-1.
See Timing Diagram, Figure 4-2.
Ground Current is independent of ILOAD.
 2001-2014 Microchip Technology Inc.
DS20001378D-page 3
TC1267
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
3.0
PIN FUNCTION TABLE
Pin No.
Symbol
Description
1
VAUX
2
VIN
3
GND
Logic and power ground.
4
VOUT
LDO 3.3V output.
5
DR
Auxiliary input supply, nominally 3.3V.
Main input supply for the TC1267, nominally 5V.
Driver output for external P-channel MOSFET pass element.
DETAILED DESCRIPTION
FIGURE 3-1:
APPLICATION CIRCUIT
Q1
TAB IS GND
VIN
GND
VOUT
DR
VAUX
TC1267
3.3V
5V
C1
4.7μF
3.3V
C2
0.1μF
C3
0.1μF
C4
4.7μF
C5
0.1μF
NOTE: External switch (Q1): use Motorola MGSF1P02ELT1 or equivalent
(PMOS, typical Gate Threshold Voltage = 1V, typical RDS(ON) = 0.4Ω at VGS = 2.5V)
DS20001378D-page 4
 2001-2014 Microchip Technology Inc.
TC1267
4.0
THERMAL CONSIDERATIONS
4.1
Thermal Shutdown
Integrated thermal protection circuitry shuts the
regulator off when die temperature exceeds 160°C.
The regulator remains off until the die temperature
drops to approximately 150°C.
4.2
Power Dissipation
The amount of power the regulator dissipates is
primarily a function of input and output voltage, and
output current. The following equation is used to
calculate worst case actual power dissipation:
EQUATION 4-1:
Equation 4-1 can be used in conjunction with
Equation 4-2 to ensure regulator thermal operation is
within limits. For example:
Given:
VINMAX
= 5V ± 5%
VOUTMIN = 3.217V
ILOADMAX = 400mA
TJMAX
= 95°C
TAMAX
= 70°C
JA
= 27°C/W (DDPAK mounted on
1000 sq mm topside copper area)
Find: 1. Actual power dissipation
2. Maximum allowable dissipation
Actual power dissipation:
PD  (VINMAX – VOUTMIN)ILOADMAX
PD  (VINMAX – VOUTMIN)ILOADMAX
Where:
= (5.25V - 3.217V) 400mA
PD = Worst case actual power dissipation
VINMAX = Maximum voltage on VIN
VOUTMIN = Minimum regulator output voltage
ILOADMAX = Maximum output (load) current
= 813mW
The
maximum
allowable
power
dissipation
(Equation 4-2) is a function of the maximum ambient
temperature (TAMAX), the maximum allowable die
temperature (TJMAX) and the thermal resistance from
junction-to-air (JA).
Maximum allowable power dissipation:
PDMAX = (TJMAX – TAMAX)
JA
= (95 – 70)
27
= 423mW
In this example, the TC1267 dissipates a maximum of
813mW; below the allowable limit of 926mW.
EQUATION 4-2:
PDMAX = (TJMAX – TAMAX)
JA
Where all terms are previously defined.
Table 4-1 shows various values of JA for the TC1267
packages.
TABLE 4-1:
Copper
Area
(Topside)*
THERMAL RESISTANCE
GUIDELINES FOR TC1267 IN
5-PIN DDPAK
Copper
Area
(Backside)
Board
Area
Thermal
Resistance
JA)
2500 sq mm 2500 sq mm 2500 sq mm
25°C/W
1000 sq mm 2500 sq mm 2500 sq mm
27°C/W
125 sq mm
35°C/W
2500 sq mm 2500 sq mm
*Tab of device attached to topside copper.
 2001-2014 Microchip Technology Inc.
DS20001378D-page 5
TC1267
FIGURE 4-1:
5V DETECT THRESHOLD
4.4V
VHYST
VTH(HI)
VIN
VTH(LO)
3.65V
2.0V
DR
2.0V
NOTE: VIN rise and fall times (10% to 90%) to be ≥ 100μsec.
FIGURE 4-2:
TIMING DIAGRAM
4.4V
VIN
3.65V
tDH
tDL
DR
2.0V
2.0V
NOTE: VIN rise and fall times (10% to 90%) to be ≤ 0.1μsec.
DS20001378D-page 6
 2001-2014 Microchip Technology Inc.
TC1267
5.0
TYPICAL CHARACTERISTICS
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein are
not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
IQ vs. VIN vs. Junction Temperature
0.45
+125°C
IO = 0.1mA
VAUX = 0V
0.40
0.35
IQ vs. VIN vs. Junction Temperature
0.45
0.35
+125°C
0.30
IQ (mA)
IQ (mA)
0.30
0.25
0.20
0.15
0.25
+25°C
0.20
0.15
-5°C
0.10
-5°C
0.10
+25°C
0.05
0.05
0.00
0.00
0
1
2
3
VIN (V)
4
5
6
0
IQ (Aux) vs. VAUX vs. Junction Temperature
0.35
IQ (Aux) (mA)
+125°C
-5°C
0.15
0.10
+25°C
0.05
2
3
VIN (V)
4
5
6
IO = 0mA
VAUX = 5V
0.30
0.25
0.20
1
IQ (Aux) vs. VAUX vs. Junction Temperature
0.35
IO = 0mA
VAUX = 0V
0.30
IQ (Aux) (mA)
IO = 0.1mA
VAUX = 3.3V
0.40
0.25
0.20
-5°C
+125°C
+25°C
0.15
0.10
0.05
0.00
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
3
3.3 3.6
VAUX (V)
0.00
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
3
3.3 3.6
VAUX (V)
LDO Output Voltage vs. Junction Temperature
3.34
3.33
IO = 200mA
VIN = 5V
VOUT (V)
3.32
3.31
3.30
3.29
3.28
3.27
3.26
-50
-25
0
25
50
75
100
125
JUNCTION TEMPERATURE °C
 2001-2014 Microchip Technology Inc.
DS20001378D-page 7
TC1267
5.0
TYPICAL CHARACTERISTICS (CONTINUED)
Drive High Delay
Drive Low Delay
VIN steps from 0.8V to 5V
See application circuit on Page 54
ILOAD = 200mA
Trace 1: VIN stepping for 0.8V to 5V
Trace 2: DR going high at VTH(HI)
TDH = < 4PS
VO (min) with VIN Rising
Trace 1: VIN stepping for 5.5V to 0V
Trace 2: DR going low
TDL = < 600nS
VO (min) with VIN Falling
Notice no voltage spikes during transition
from VAUX to LDO output
VOUT voltage difference is IOUT x RDS(ON) and variations
between VAUX supply and LDO output voltage
Trace 1: VIN – 3A charging a 1500µF capacitor
Trace 2: DR going high at VTH(HI)
Trace 3: VOUT, offset 3.3V. VOUT(min) = 3.24V
ILOAD = 20mA
DS20001378D-page 8
VOUT voltage difference is IOUT x RDS(ON) + voltage
difference from LDO to VAUX supply
Trace 1: VIN – discharging a 1500µF capacitor
Trace 2: DR going low at VTH(LO)
Trace 3: VOUT, offset 3.3V. VOUT(min) = 3.14V
ILOAD = 20mA
 2001-2014 Microchip Technology Inc.
TC1267
6.0
PACKAGING INFORMATION
6.1
Package Marking Information
Package marking data not available at this time.
6.2
Taping Form
Component Taping Orientation for 5-Pin DDPAK Devices
PIN 1
User Direction of Feed
Device
Marking
W
P
Standard Reel Component Orientation
for TR Suffix Device
(Mark Right Side Up)
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
24 mm
16 mm
750
13 in
5-Pin DDPAK
6.3
Package Dimensions
Note:
For the most current package drawings, please see the Microchip Packaging Specification located
at http://www.microchip.com/packaging
5-Pin DDPAK
.410 (10.41)
.385 (9.78)
.183 (4.65)
.170 (4.32)
.067 (1.70)
.045 (1.14)
.055 (1.40)
.045 (1.14)
3° - 7°
(5x)
.370 (9.40)
.330 (8.38)
.010 (0.25)
.000 (0.00)
.605 (15.37)
.549 (13.95)
.026 (0.66)
.014 (0.36)
.110 (2.79)
.068 (1.72)
.037 (0.94)
.026 (0.66)
PIN 1
.067 (1.70) TYP.
8° MAX.
Dimensions: inches (mm)
 2001-2014 Microchip Technology Inc.
DS20001378D-page 9
TC1267
7.0
REVISION HISTORY
Revision C (November 2012)
Added a note to each package outline drawing.
Revision D (December 2014)
Added “Obsolete” note box to header.
DS20001378D-page 10
 2001-2014 Microchip Technology Inc.
TC1267
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 2001-2014 Microchip Technology Inc.
DS20001378D-page 11
TC1267
NOTES:
DS20001378D-page 12
 2001-2014 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
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OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,
LANCheck, MediaLB, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,
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trademarks of Microchip Technology Incorporated in the
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The Embedded Control Solutions Company and mTouch are
registered trademarks of Microchip Technology Incorporated
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Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,
KleerNet logo, MiWi, MPASM, MPF, MPLAB Certified logo,
MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code
Generation, PICDEM, PICDEM.net, PICkit, PICtail,
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© 2001-2014, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
ISBN: 978-1-63276-850-6
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 2001-2014 Microchip Technology Inc.
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DS20001378D-page 13
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DS20001378D-page 14
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Fax: 86-23-8980-9500
China - Hangzhou
Tel: 86-571-8792-8115
Fax: 86-571-8792-8116
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
India - Pune
Tel: 91-20-3019-1500
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Germany - Dusseldorf
Tel: 49-2129-3766400
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
Germany - Pforzheim
Tel: 49-7231-424750
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Italy - Venice
Tel: 39-049-7625286
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
Poland - Warsaw
Tel: 48-22-3325737
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
Sweden - Stockholm
Tel: 46-8-5090-4654
UK - Wokingham
Tel: 44-118-921-5800
Fax: 44-118-921-5820
Taiwan - Kaohsiung
Tel: 886-7-213-7830
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
03/25/14
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