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KD1084 series
5A Low drop positive voltage regulator adjustable and fixed
Features

Typical dropout 1.3V (at 5A) Three terminal adjustable or fixed output voltage 1.8V, 2.5V, 3.3V. Guaranteed output current up to 5A Output tolerance 1% at 25C and 2% in full temperature range for the "A" version Output tolerance 2% at 25C and 3% In full temperature range internal power and thermal limit Wide operating temp. range -40C to 125C Package available: TO-220, D2PAK, DPAK Pinout compatibility with standard adjustable VREG
D2PAK TO-220 DPAK

Description
The KD1084 is a LOW DROP Voltage Regulator able to provide up to 5A of Output Current. Dropout is guaranteed at a maximum of 1.5V at the maximum output current, decreasing at lower loads. The KD1084 is pin to pin compatible with he older 3-terminal adjustable regulators but has
better performances in term of drop and output tolerance. A 2.85V output version is suitable for SCSI-2 active termination. Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the KD1084 quiescent current flows into the load, so increase efficiency. Only a 10F minimum capacitor is need for stability. The devices are supplied in TO-220, D2PAK and DPAK. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25C for "A" version and 2% at 25C for standard version.
Schematic diagram
May 2007
Rev. 6
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KD1084 series
Contents
1 2 3 4 5 6 7 8 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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KD1084 series
Pin configuration
1
Figure 1.
Pin configuration
Pin connections (top view)
TO-220
DPAK
D2PAK
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Maximum ratings
KD1084 series
2
Table 1.
Maximum ratings
Absolute maximum ratings
Parameter DC Input voltage Output current Power dissipation Storage temperature range Operating junction temperature range Value 12 Internally Limited Internally Limited -55 to +150 -40 to +125 Unit V mA mW C C
Symbol VI IO PD TSTG TOP
Note:
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied Thermal Data
Parameter Thermal resistance junction-case Thermal resistance junction-ambient TO-220 3 50 DPAK 8 100 D2PAK 3 62.5 Unit C/W C/W
Table 2.
Symbol RthJC RthJA
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KD1084 series
Schematic application
3
Figure 2.
Schematic application
Application circuit
R2 V O = V REF 1 + ------ R
1
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Electrical characteristics
KD1084 series
4
Table 3.
Symbol VO VO VO Vd Iq Isc
Electrical characteristics
Electrical characteristics of KD1084A#18 (VI = 4.8V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 0 mA, TJ = 25C IO = 0 to 5A, VI = 3.4 to 10V Line regulation IO = 0 mA, VI = 3.4 to 10V IO = 0 mA, VI = 3.4 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation SVR eN S S Supply voltage rejection IO = 0 to 5A, TJ = 25C IO = 0 to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 5A VI = 5.3 1.5V 60 5.5 TJ = 25C Min. 1.782 1.764 Typ. 1.8 1.8 0.5 1 3 7 1.3 5 7 0.003 75 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.015 Max. 1.818 1.836 6 6 15 20 1.5 10 Unit V V mV mV mV V V mA A %/W dB % % %
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
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KD1084 series Table 4.
Symbol VO VO VO Vd Iq Isc
Electrical characteristics
Electrical characteristics of KD1084A#25 (VI = 5.5V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 0 mA, TJ = 25C IO = 0 to 5A, VI = 4.1 to 10V Line regulation IO = 0 mA, VI = 4.1 to 10V IO = 0 mA, VI = 4.1 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 5A, TJ = 25C IO = 0 to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 5A VI = 6 1.5V 60 5.5 TJ = 25C Min. 2.475 2.45 Typ. 2.5 2.5 0.5 1 3 7 1.3 5 7 0.003 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.015 Max. 2.525 2.55 6 6 15 20 1.5 10 Unit V V mV mV mV V V mA A %/W dB % % %
SVR eN S S
Supply voltage rejection
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
Table 5.
Symbol VO VO VO Vd Iq Isc
Electrical characteristics of KD1084A#33 (VI = 6.3V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 0 mA, TJ = 25C IO = 0 to 5A, VI = 4.9 to 10V Line regulation IO = 0 mA, VI = 4.9 to 10V IO = 0 mA, VI = 4.9 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 5A, TJ = 25C IO = 0 to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 5A VI = 6.8 1.5V 60 5.5 TJ = 25C Min. 3.267 3.234 Typ. 3.3 3.35 0.5 1 3 7 1.3 5 7 0.003 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.015 Max. 3.333 3.366 6 6 15 20 1.5 10 Unit V V mV mV mV V V mA A %/W dB % % %
SVR eN S S
Supply voltage rejection
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
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Electrical characteristics
KD1084 series
Table 6.
Symbol VO VO VO Vd IO(min) Isc
Electrical characteristics of KD1084A (VI = 4.25V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 10 mA, TJ = 25C IO = 10 mA to 5A, VI = 2.85 to 10V Line regulation IO = 10 mA, VI = 2.85 to 10V IO = 10 mA, VI = 2.85 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 10 mA to 5A, TJ = 25C IO = 10 mA to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, CADJ = 25F, IO = 5A, VI = 4.75 1.5V VI = 4.25V, IO = 10 mA VI = 2.85 to 10V, IO = 10 mA to 5A 60 5.5 TJ = 25C Min. 1.237 1.225 Typ. 1.25 1.25 0.015 0.035 0.1 0.2 1.3 3 7 0.003 72 55 0.2 0.003 0.5 TA = 125C, 1000Hrs 0.5 120 5 0.015 Max. 1.263 1.275 0.2 0.2 0.3 0.4 1.5 10 Unit V V mV mV mV V V mA A %/W dB A A % % %
SVR IADJ IADJ eN S S
Supply voltage rejection Adjust pin current Adjust pin current change
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
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KD1084 series
Electrical characteristics
Table 7.
Symbol VO VO VO Vd Iq Isc
Electrical characteristics of KD1084#18 (VI = 4.8V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 0 mA, TJ = 25C IO = 0 to 5A, VI = 3.4 to 10V Line regulation IO = 0 mA, VI = 3.4 to 10V IO = 0 mA, VI = 3.4 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 5A, TJ = 25C IO = 0 to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 5A VI = 5.3 1.5V 60 5.5 TJ = 25C Min. 1.764 1.746 Typ. 1.8 1.8 0.5 1 3 7 1.3 5 7 0.003 75 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.015 Max. 1.836 1.854 6 6 15 20 1.5 10 Unit V V mV mV mV V V mA A %/W dB % % %
SVR eN S S
Supply voltage rejection
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
Table 8.
Symbol VO VO VO Vd Iq Isc
Electrical characteristics of KD1084#25 (VI = 5.5V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 0 mA, TJ = 25C IO = 0 to 5A, VI = 4.1 to 10V Line regulation IO = 0 mA, VI = 4.1 to 10V IO = 0 mA, VI = 4.1 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 5A, TJ = 25C IO = 0 to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 5A VI = 6 1.5V 60 5.5 TJ = 25C Min. 2.45 2.425 Typ. 2.5 2.5 0.5 1 3 7 1.3 5 7 0.003 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.015 Max. 2.55 2.575 6 6 15 20 1.5 10 Unit V V mV mV mV V V mA A %/W dB % % % 9/22
SVR eN S S
Supply voltage rejection
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
Electrical characteristics
KD1084 series
Table 9.
Symbol VO VO VO Vd Iq Isc
Electrical characteristics of KD1084#33 (VI = 5.85V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 0 mA, TJ = 25C IO = 0 to 5A, VI = 4.9 to 10V Line regulation IO = 0 mA, VI = 4.9 to 10V IO = 0 mA, VI = 4.9 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 5A, TJ = 25C IO = 0 to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 5A VI = 6.8 1.5V 60 5.5 TJ = 25C Min. 3.234 3.2 Typ. 3.3 3.3 0.5 1 3 7 1.3 5 7 0.003 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.015 Max. 3.366 3.4 6 6 15 20 1.5 10 Unit V V mV mV mV V V mA A %/W dB % % %
SVR eN S S
Supply voltage rejection
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
10/22
KD1084 series Table 10.
Symbol VO VO VO Vd IO(min) Isc
Electrical characteristics
Electrical characteristics of KD1084 (VI = 4.25V, CI = CO = 10F(Tant.), TA = -40 to 125C, unless otherwise specified)
Parameter Output voltage Test Conditions IO = 10 mA, TJ = 25C IO = 10 mA to 5A, VI = 2.85 to 10V Line regulation IO = 10 mA, VI = 2.85 to 10V IO = 10 mA, VI = 2.85 to 10V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 10 mA to 5A, TJ = 25C IO = 10 mA to 5A IO = 5 A VI 10V VI - VO = 5V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, CADJ = 25F, IO = 5A, VI = 4.75 1.5V VI = 4.25V, IO = 10 mA VI = 2.85 to 10V, IO = 10 mA to 5A 60 5.5 TJ = 25C Min. 1.225 1.213 Typ. 1.25 1.25 0.015 0.035 1 0.2 1.3 3 7 0.003 72 55 0.2 0.003 0.5 TA = 125C, 1000Hrs 0.5 120 5 0.015 Max. 1.275 1.287 0.2 0.2 0.3 0.4 1.5 10 Unit V V mV mV mV V V mA A %/W dB A A % % %
SVR IADJ IADJ eN S S
Supply voltage rejection Adjust pin current Adjust pin current change
RMS Output noise voltage TA = 25C, f = 10Hz to 10KHz (% of VO) Temperature stability Long term stability
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Typical application
KD1084 series
5
Figure 3.
Typical application
Unless otherwise specified TJ = 25C, CI = CO = 10F (tant.) Dropout voltage vs output current Figure 4. Dropout voltage vs temperature
Figure 5.
Short circuit current vs dropout voltage
Figure 6.
Line regulation vs temperature
Figure 7.
Output voltage vs temperature
Figure 8.
Load regulation vs temperature
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KD1084 series
Typical application
Figure 9.
Supply voltage rejection vs frequency
Figure 10. Adjust pin current vs output current
Figure 11. Line transient
Figure 12. Load transient
VI=4 to 6V, IO=200mA,CI = 1F(tant), CO=10F(tant), ts=tf=5s
VI=7 V, IO=0.1 to 5 A, CI = 1F(tant), CO=10F(tant) ts=tf=3.5s
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Package mechanical data
KD1084 series
6
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
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KD1084 series
Package mechanical data
TO-220 MECHANICAL DATA
DIM. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 mm. MIN. 4.40 1.23 2.40 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 0.645 0.551 0.116 0.620 0.260 0.154 0.151 TYP MAX. 4.60 1.32 2.72 MIN. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch TYP. MAX. 0.181 0.051 0.107
P011C
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Package mechanical data
KD1084 series
DPAK MECHANICAL DATA
mm. DIM. MIN. A A1 A2 B b4 C C2 D D1 E E1 e e1 H L (L1) L2 L4 R V2 2.2 0.9 0.03 0.64 5.2 0.45 0.48 6 5.1 6.4 4.7 2.28 4.4 9.35 1 2.8 0.8 0.6 0.2 0 8 0 1 0.023 0.008 8 4.6 10.1 0.173 0.368 0.039 0.110 0.031 0.039 6.6 0.252 0.185 0.090 0.181 0.397 TYP MAX. 2.4 1.1 0.23 0.9 5.4 0.6 0.6 6.2 MIN. 0.086 0.035 0.001 0.025 0.204 0.017 0.019 0.236 0.200 0.260 TYP. MAX. 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 inch
0068772-F
16/22
KD1084 series
Package mechanical data
D2PAK MECHANICAL DATA
mm. DIM. MIN. A A1 A2 B B2 C C2 D D1 E E1 G L L2 L3 M R V2 0 4.88 15 1.27 1.4 2.4 0.4 8 0 10 8.5 5.28 15.85 1.4 1.75 3.2 0.192 0.590 0.050 0.055 0.094 0.016 8 4.4 2.49 0.03 0.7 1.14 0.45 1.23 8.95 8 10.4 0.393 0.335 0.208 0.624 0.055 0.068 0.126 TYP MAX. 4.6 2.69 0.23 0.93 1.7 0.6 1.36 9.35 MIN. 0.173 0.098 0.001 0.027 0.044 0.017 0.048 0.352 0.315 0.409 TYP. MAX. 0.181 0.106 0.009 0.036 0.067 0.023 0.053 0.368 inch
P011P6G
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Package mechanical data
KD1084 series
Tape & Reel DPAK-PPAK MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.80 10.40 2.55 3.9 7.9 6.90 10.50 2.65 4.0 8.0 12.8 20.2 60 22.4 7.00 10.60 2.75 4.1 8.1 0.268 0.409 0.100 0.153 0.311 0.272 0.413 0.104 0.157 0.315 13.0 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.2.76 0.417 0.105 0.161 0.319 0.512 MIN. TYP. MAX. 12.992 0.519 inch
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KD1084 series
Package mechanical data
Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 10.50 15.70 4.80 3.9 11.9 10.6 15.80 4.90 4.0 12.0 12.8 20.2 60 14.4 10.70 15.90 5.00 4.1 12.1 0.413 0.618 0.189 0.153 0.468 0.417 0.622 0.193 0.157 0.472 13.0 TYP MAX. 180 13.2 0.504 0.795 2.362 0.567 0.421 0.626 0.197 0.161 0.476 0.512 MIN. TYP. MAX. 7.086 0.519 inch
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Order codes
KD1084 series
7
Table 11.
Order codes
Order codes
Part numbers TO-220 D2PAK DPAK KD1084DT18R KD1084AD2T18R KD1084D2T25R KD1084ADT18R KD1084DT25R KD1084ADT25R KD1084DT33R KD1084AV33 KD1084ADT33R KD1084DT-R KD1084AD2T-R KD1084ADT-R Output voltage 1.8 V 1.8 V 2.5 V 2.5 V 3.3 V 3.3 V ADJ ADJ Tolerance 2% 1% 2% 1% 2% 1% 2% 1%
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KD1084 series
Revision history
8
Table 12.
Date
Revision history
Revision history
Revision 4 5 6 Order Codes has been updated. Order Codes has been updated and the document has been reformatted. Order Codes has been updated. Changes
06-Sep-2005 02-Apr-2007 30-May-2007
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KD1084 series
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