Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsLD39080DT33-R

January 2007 Rev. 1 1/20

LD39080

Ultra low drop BICMOS voltage regulator

Feature summary

■ 0.8A Guaranteed output current

■ Ultra low dropout voltage (150mV typ. @ 0.8A

load, 20mV typ. @150mA load)

■ Very low quiescent current (1mA typ. @ 0.8A

load, 1µA max @ 25°C in off mode)

■ Logic-controlled electronic shutdown

■ Current and thermal internal limit

■ ±1.5% Output voltage tolerance @ 25°C

■ Fixed and ADJ output voltages: 1.22V, 1.8V,

2.5V, 3.3V, ADJ. (*see order code)

■ Temperature range: -40 to 125°C

■ Fast dynamic response to line and load

changes

■ Stable with ceramic capacitor (see paragraph

7.1, 7.2, 7.3)

■ Available in PPAK, DPAK and DFN8 (4x4mm)

Typical application

■ Microprocessor power supply

■ DSPs power supply

■ Post regulators for switching suppliers

■ High efficiency linear regulator

Description

The LD39080 is a fast ultra low drop linear

regulator which operates from 2.5V to 6V input

supply.

A wide range of output options are available. The

low drop voltage, low noise, and ultra low

quiescent current make it suitable for low voltage

microprocessor and memory applications. The

device is developed on a BiCMOS process which

allows low quiescent current operation

independently of output load current.

DFN8 (4x4 mm)

PPAK

DPAK

www.st.com

Order codes

Part numbers

Output voltage

DPAK (T&R) PPAK (T&R) DFN

(1)

1. Available on request

LD39080DT12-R LD39080PU12R 1.22V

LD39080DT18-R LD39080PT18-R LD39080PU18R 1.8V

LD39080DT25-R LD39080PT25-R LD39080PU25R 2.5V

LD39080DT33-R LD39080PT33-R LD39080PU33R 3.3V

LD39080PT-R LD39080PU-R ADJ From 1.22 to 5.0V

Summary of content (20 pages)

PAGE 1
LD39080 Ultra low drop BICMOS voltage regulator Feature summary ■ 0.8A Guaranteed output current ■ Ultra low dropout voltage (150mV typ. @ 0.8A load, 20mV typ. @150mA load) ■ Very low quiescent current (1mA typ. @ 0.8A load, 1µA max @ 25°C in off mode) DPAK PPAK ■ Logic-controlled electronic shutdown ■ Current and thermal internal limit ■ ±1.5% Output voltage tolerance @ 25°C ■ Fixed and ADJ output voltages: 1.22V, 1.8V, 2.5V, 3.3V, ADJ.
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LD39080 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Electrical characteristics . . . . . . . . . . . .
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LD39080 Diagram 1 Diagram Figure 1.
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Pin configuration LD39080 2 Pin configuration Figure 2. Pin connections (top view for DPAK and PPAK, bottom view for DFN8) Table 1. DPAK PPAK DFN8 (4x4 mm) Pin description Pln N° DFN 8 Symbol Note VSENSE/N.C. For fixed versions: to be connected with LDO Output Voltage pins for DFN package and Not Connected on PPAK PPAK DPAK 5 ADJ For adjustable version: Error Amplifier Input pin for VO from 1.22 to 5.0V 3, 4 2 1 VI LDO Input Voltage; VI from 2.
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LD39080 3 Typical application circuits Typical application circuits (CI and CO Capacitors must be placed as close as possible to the IC pins) Figure 3. 1 Figure 4. LD39080 fixed version with inhibit Inhibit Pin is not internally pulled down/up then it must not be left floating. Disable the device when connected to GND or to a positive voltage less than 0.3V LD39080 adjustable version VO = VREF (1 + R1/R2) 2 Set R2 as close as possible to 4.7KΩ.
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Typical application circuits Figure 5. LD39080 DPAK Figure 6.
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LD39080 Maximum ratings 4 Maximum ratings Table 2. Absolute maximum ratings Symbol VI VINH VO VADJ Parameter Value Unit -0.3 to 6.5 V INHIBIT Input voltage -0.3 to VI +0.3 (6.5V Max) V DC Output voltage -0.3 to VI +0.3 (6.5V Max) V ADJ Pin voltage -0.3 to VI +0.3 (6.
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Electrical characteristics LD39080 5 Electrical characteristics Table 4. Electrical characteristics (TJ = 25°C, VI = VO+1V, CI = 1µF, CO = 2.2µF, ILOAD = 10mA, VINH = 2V, unless otherwise specified) Symbol VI Parameter Parameter Operating input voltage VI = VO+1V, ILOAD = 10mA to 0.8A VO Output voltage tolerance VREF Reference voltage ∆VO Output voltage LINE regulation Output voltage LOAD ∆VO/∆ILOAD regulation VDROP IQ Dropout voltage (VI - VO) VI = VO+1V to 6V, ILOAD = 10mA to 0.
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LD39080 Typical performance characteristics 6 Typical performance characteristics Figure 7. (TJ = 25°C, VI = VO+1V, CI = 1µF, CO = 2.2µF, ILOAD = 10mA, VINH = VI, unless otherwise specified) Output voltage vs temperature Figure 8. Dropout voltage vs temperature Figure 9. Dropout voltage vs output current Figure 11. Quiescent current vs supply voltage Figure 10. Quiescent current vs output current Figure 12.
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Typical performance characteristics LD39080 Figure 13. Quiescent current vs temperature Figure 14. Short circuit current vs temperature Figure 15. Output voltage vs input voltage Figure 16. Supply voltage rejection vs temperature Figure 17. Stability region vs CO & ESR (at 100kHz) Figure 18.
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LD39080 Typical performance characteristics Figure 19. Load transient Figure 20. Line transient VI = 3.5V, IO = 10mA to 0.8A, CI = 1µF, CO = 2.2µF VI = 3.5V to 5.5V, ILOAD = 10mA, CO = 2.
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Application notes 7 Application notes 7.1 External capacitors LD39080 The LD39080 requires external capacitors for regulator stability. These capacitors must be selected to meet the requirements of minimum capacitance and equivalent series resistance (see Figure 17. Figure 18.). The input/output capacitors must be located less than 1cm from the relative pins and connected directly to the input/output ground pins using traces which have no other currents flowing through them.
PAGE 13
LD39080 8 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® 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.
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Package mechanical data LD39080 PPAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A2 0.03 0.23 0.001 0.009 B 0.4 0.6 0.015 0.023 B2 5.2 5.4 0.204 0.212 0.023 C 0.45 0.6 0.017 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 0.244 6.6 0.252 D1 E 5.1 6.4 0.201 0.260 E1 4.7 0.185 e 1.27 0.050 G 4.9 G1 2.38 2.7 0.093 0.106 H 9.35 10.1 0.368 0.397 L2 0.8 L4 0.6 L5 1 L6 5.25 1 1 2.8 0.
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LD39080 Package mechanical data DPAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A2 0.03 0.23 0.001 0.009 B 0.64 0.9 0.025 0.035 b4 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 0.244 6.6 0.252 D1 E 5.1 6.4 E1 0.200 4.7 e 0.260 0.185 2.28 0.090 e1 4.4 4.6 0.173 0.181 H 9.35 10.1 0.368 0.397 L 1 0.039 (L1) 2.8 0.110 L2 0.8 0.031 L4 0.
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Package mechanical data LD39080 DFN8 (4x4) MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 0.80 0.90 1.00 0.031 0.035 0.039 A1 0 0.02 0.05 0 0.001 0.002 A3 0.20 0.008 b 0.23 0.30 0.38 0.009 0.012 0.015 D 3.90 4.00 4.10 0.154 0.157 0.161 D2 2.82 3.00 3.23 0.111 0.118 0.127 E 3.90 4.00 4.10 0.154 0.157 0.161 E2 2.05 2.20 2.30 0.081 0.087 0.091 e L 0.80 0.40 0.50 0.031 0.60 0.016 0.020 0.
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LD39080 Package mechanical data Tape & Reel DPAK-PPAK MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 330 13.0 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 22.4 0.519 0.882 Ao 6.80 6.90 7.00 0.268 0.272 0.2.76 Bo 10.40 10.50 10.60 0.409 0.413 0.417 Ko 2.55 2.65 2.75 0.100 0.104 0.105 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.
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Package mechanical data LD39080 Tape & Reel QFNxx/DFNxx (4x4) MECHANICAL DATA mm. inch DIM. MIN. TYP A MIN. TYP. 330 C 12.8 D 20.2 N 99 13.2 MAX. 12.992 0.504 0.519 0.795 101 T 18/20 MAX. 3.898 3.976 14.4 0.567 Ao 4.35 0.171 Bo 4.35 0.171 Ko 1.1 0.043 Po 4 0.157 P 8 0.
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LD39080 Revision history 9 Revision history Table 5. Revision history Date Revision 26-Jan-2007 1 Changes Initial release.
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LD39080 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.