KD1084AXX KD1084AXX18
5 A low drop positive voltage regulator adjustable and fixed
Features
■ ■ ■ ■ ■
Typical dropout 1.3 V (at 5 A) Three terminal adjustable or fixed output voltage 1.8 V, 3.3 V. Guaranteed output current up to 5 A Output tolerance ±1 % at 25 °C and ± 2 % in full temperature range for the "A" version Output tolerance ± 2 % at 25 °C and ± 3 % in full temperature range internal power and thermal limit Wide operating temp. range -40 °C to 125 °C Package available: D²PAK and DPAK Pinout compatibility with standard adjustable VREG A 2.85 V 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 10 µF minimum capacitor is need for stability. The devices are supplied in D²PAK and DPAK. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ±1% at 25 °C for "A" version and ± 2 % at 25 °C for standard version.
D²PAK DPAK
■ ■ ■
Description
The KD1084 is a low drop voltage regulator able to provide up to 5 A of output current. Dropout is guaranteed at a maximum of 1.5 V 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.
Table 1.
Device summary
Order codes D²PAK DPAK Output voltage 1.8 V KD1084ADT-R ADJ Tolerance 1% 1%
KD1084AD2T18R
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Contents
KD1084AXX, KD1084AXX18
Contents
1 2 3 4 5 6 7 8 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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Diagram
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Figure 1.
Diagram
Schematic diagram
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Pin configuration
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Figure 2.
Pin configuration
Pin connections (top view)
D²PAK
DPAK
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Maximum ratings
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Table 2.
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 °C °C Unit V
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 DPAK 8 100 D²PAK 3 62.5 Unit °C/W °C/W
Table 3.
Symbol RthJC RthJA
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Schematic application
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Figure 3.
Schematic application
Application circuit
R2 V O = V REF ⋅ ⎛ 1 + ------⎞ ⎝ R⎠
1
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Electrical characteristics
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Electrical characteristics
VI = 4.8 V, CI = CO = 10 µF (tant.), TA = -40 to 125 °C, unless otherwise specified.
Table 4.
Symbol VO ΔVO ΔVO Vd Iq Isc
Electrical characteristics of KD1084AXX18
Parameter Output voltage Test conditions IO = 0 mA, TJ = 25°C 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 = 25°C IO = 0 to 5A IO = 5 A VI ≤ 10V VI - VO = 5V TA = 25°C, 30ms pulse f = 120 Hz, CO = 25µF, IO = 5A VI = 5.3 ± 1.5V 60 5.5 TJ = 25°C 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 = 125°C, 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 % % %
SVR eN S S
Supply voltage rejection
RMS Output noise voltage TA = 25°C, f = 10Hz to 10kHz (% of VO) Temperature stability Long term stability
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Electrical characteristics
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VI = 4.25 V, CI = CO = 10 µF (tant.), TA = -40 to 125°C, unless otherwise specified. Table 5.
Symbol VO ΔVO ΔVO Vd IO(min) Isc
Electrical characteristics of KD1084AXX
Parameter Output voltage Test conditions IO = 10 mA, TJ = 25°C 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 = 25°C IO = 10 mA to 5A IO = 5 A VI ≤ 10V VI - VO = 5V TA = 25°C, 30ms pulse f = 120 Hz, CO = 25µF, CADJ = 25µF, 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 = 25°C 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 = 125°C, 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 µA µA % % %
SVR IADJ ΔIADJ eN S S
Supply voltage rejection Adjust pin current Adjust pin current change
RMS Output noise voltage TA = 25°C, f = 10Hz to 10kHz (% of VO) Temperature stability Long term stability
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Typical application
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Figure 4.
Typical application
Unless otherwise specified TJ = 25 °C, CI = CO = 10 µF (tant.) Dropout voltage vs. output current Figure 5. Dropout voltage vs. temperature
Figure 6.
Short circuit current vs. dropout voltage
Figure 7.
Line regulation vs. temperature
Figure 8.
Output voltage vs. temperature
Figure 9.
Load regulation vs. temperature
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Typical application
KD1084AXX, KD1084AXX18
Figure 10. Supply voltage rejection vs. frequency
Figure 11. Adjust pin current vs. output current
Figure 12. Line transient
Figure 13. Load transient
VI = 4 to 6 V, IO = 200 mA, CI = 1 µF(tant), CO = 10 µF(tant), ts = t f = 5 µ s
VI = 7 V, IO = 0.1 to 5 A, CI = 1 µF(tant), CO = 10 µF(tant), ts = tf = 3.5 µs
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Package mechanical data
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Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.
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Package mechanical data
KD1084AXX, KD1084AXX18
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
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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.
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Package mechanical data
KD1084AXX, KD1084AXX18
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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Package mechanical data
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/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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Revision history
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Table 6.
Date
Revision history
Document revision history
Revision 4 5 6 7 8 9 10 Order codes updated. Order codes updated. Order codes updated. Added Table 1. Modified: Table 1 on page 1. Modified: Table 1 on page 1. Modified: Table 1 on page 1. Changes
06-Sep-2005 02-Apr-2007 30-May-2007 18-Dec-2007 21-Feb-2008 16-Jul-2008 28-Jul-2009
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