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| LD1580XX 7 A very low drop positive voltage regulator adjustable Features Output current limit Low dropout voltage: typically 400 mV at 7 A output current Output voltage remote sense pin Fast transient response Thermal shutdown protection with hysteresis Wide operating temperature range -40 C to 125 C No supply sequencing problems in dual supply mode Output voltages available: adjustable power dissipation in case of insufficient heatsinking. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 2 % at the maximum output current and over the full temperature range. PPAK Description The LD1580 is a very low dropout positive linear voltage regulator particularly suitable in applications requiring output currents up to 7 A. The LD1580 typical dropout voltage is 400 mV at 7 A while it decreases at lighter loads. This very low dropout is achieved thanks to a second input voltage pin, named VCONTROL, which is also responsible of the output power stage driving. The LD1580 is provided with an output voltage remote sense pin which reduces dramatically any output voltage variations that could occur due to load changes. The ADJ pin is still available. A small capacitor on this pin helps to improve transient response. The LD1580 also features a built-in output current limit function and a thermal shutdown protection with hysteresis which prevents from excessive Table 1. Device summary Part number LD1580XX Order code LD1580P2T-R Rev 5 Packaging tape and reel 1/15 www.st.com 15 April 2008 Contents LD1580XX Contents 1 2 3 4 5 6 7 8 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 LD1580XX Diagram 1 Figure 1. Diagram Schematic diagram 3/15 Pin configuration LD1580XX 2 Figure 2. Pin configuration Pin connections (top view) 4/15 LD1580XX Maximum ratings 3 Table 2. Maximum ratings Absolute maximum ratings Parameter DC VPOWER voltage DC VCONTROL voltage Output current Power dissipation Storage temperature range Operating junction temperature range Value from -0.3 to 6 from -0.3 to 13 Internally limited Internally limited -55 to +150 -40 to +125 C C Unit V V Symbol VPOWER VCONTROL IOUT 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 PPAK 3 62.5 Unit C/W C/W Table 3. Symbol RthJC RthJA 5/15 Typical application LD1580XX 4 Figure 3. Typical application Typical application circuits R2 V O = V REF 1 + ------ R 1 6/15 LD1580XX Electrical characteristics 5 Table 4. Symbol Electrical characteristics Electrical characteristics for LD1580 (TJ= - 40 C to 125 C, CP = 330 F, CC = 10 F, COUT = 100 F, unless otherwise specified) Parameter Test conditions VCONTROL=2.75 V, VPOWER=2 V TJ=25 C, IOUT=10 mA Min. 1.237 Typ. 1.250 1.250 0.08 0.08 6 30 33 60 50 8 61.5 9 81.5 0.95 0.95 1 1.05 (2) Max. 1.263 Unit VO Output voltage V 1.275 0.24 0.4 10 60 mA 70 120 120 A A dB 1.15 1.15 V 1.2 1.3 0.15 0.4 0.6 C C V % % VCONTROL=2.7 V to 12 V 1.225 VPOWER=2.05 V to 5.5 V, IOUT=0.01 to 7A Line regulation Load regulation VCONTROL=2.5 V to 12 V VPOWER=1.75 V to 5.5 V, IOUT=10 mA VCONTROL=2.75 V, VPOWER=2.1 V IOUT=0.01 to 7 A VCONTROL=2.75 V, VPOWER=2.05 V IOUT=100 mA VCONTROL=2.75 V, VPOWER=2.05 V IOUT=4 A VCONTROL=2.75 V, VPOWER=1.75 V IOUT=4 A VCONTROL=2.75 V, VPOWER=2.05 V IOUT=7 A VO VO IC VCONTROL pin current IADJ IOUT SVR Adjust pin current Output current limit Supply voltage rejection VCONTROL=2.75 V, VPOWER=2.05 V IOUT=10 mA VCONTROL=2.75 V, VPOWER=2.05 V (1) VCONTROL=VPOWER=3.75 V Avg VRIPPLE=1 VP-P, IOUT=4 A, TJ=25 C VPOWER=2.05 V, IOUT=100 mA (2) VDC Minimum VCONTROL voltage, (VCONTROL-VO) VPOWER=2.05 V, IOUT=1 A VPOWER=2.05 V, IOUT=4 A VPOWER=2.05 V, IOUT=7 A VCONTROL=2.75 V, IOUT=1 A 0.05 0.2 0.4 170 5 VDP Minimum VPOWER voltage (VPOWER-VO) Shutdown temperature threshold Thermal shutdown hysteresis VCONTROL=2.75 V, IOUT=4 A VCONTROL=2.75 V, IOUT=7 A TSHDN THYST 1. Measured when the VOUT voltage drops below 100 mV with respect to its nominal value. 2. Measured when the VOUT voltage drops below 2 % with respect to its nominal value. 7/15 Typical characteristics LD1580XX 6 Figure 4. Typical characteristics (unless otherwise specified TJ = 25 C, CP = 330 F, CC = 10 F, COUT = 100 F) Output voltage vs temperature Figure 5. Minimum VCONTROL voltage vs temperature Figure 6. Minimum VPOWER voltage vs output Figure 7. current Output voltage vs temperature Figure 8. VCONTROL pin current vs temp. Figure 9. Minimum VPOWER voltage vs temp. 8/15 LD1580XX Typical characteristics Figure 10. VCONTROL pin current vs output current Figure 11. Output current limit vs temperature Figure 12. Quiescent current vs temperature Figure 13. Supply voltage rejection vs output current Figure 14. Line transient response Figure 15. Line transient response VPOWER=3.3V, VCONTROL=5 to 7V, IOUT=1A VPOWER=VCONTROL=5 to 7V, IOUT=1A 9/15 Typical characteristics LD1580XX Figure 16. Load transient response Figure 17. Load transient response VPOWER=VCONTROL=5V VPOWER=VCONTROL=5V Figure 18. Load transient response VPOWER=VCONTROL=5V 10/15 LD1580XX Package mechanical data 7 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. 11/15 Package mechanical data LD1580XX P2PAK mechanical data mm. Dim. Min. A A1 A2 b c c2 D D2 E E1 e e1 L L2 L3 L5 R V2 0 3.20 6.60 13.70 1.25 0.90 1.55 0.40 8 0 10.00 8.5 3.60 7.00 14.50 1.40 1.70 2.40 0.126 0.260 0.539 0.049 0.035 0.061 0.016 8 4.30 2.40 0.03 0.80 0.45 1.17 8.95 8 10.40 0.393 0.334 Typ. Max. 4.80 2.80 0.23 1.05 0.60 1.37 9.35 Min. 0.169 0.094 0.001 0.031 0.017 0.046 0.352 0.315 0.409 0.409 0.142 0.275 0.571 0.055 0.067 0.094 Typ. Max. 0.188 0.110 0.009 0.041 0.023 0.053 0.368 inch. 7226255/B 12/15 LD1580XX 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. 13/15 Revision history LD1580XX 8 Table 5. Date Revision history Document revision history Revision 3 4 5 Order codes updated. Order codes updated. Modified: Table 1 on page 1. Changes 08-Sep-2005 09-May-2007 16-Apr-2008 14/15 LD1580XX 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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