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LP2985LV-N

www.ti.com

SNOS510P –NOVEMBER 1999–REVISED APRIL 2013

LP2985LV-N Micropower 150 mA Low-Noise Low-Dropout Regulator in SOT-23 and

DSBGA packages for Applications with Output Voltages ≤ 2.0V

Designed for Use with Very Low ESR Output Capacitors

Check for Samples: LP2985LV-N

FEATURES

DESCRIPTION

The LP2985LV-N is a 150 mA, fixed-output voltage

• Ensured 150 mA Output Current

regulator designed to provide high performance and

• Smallest Possible Size (DSBGA)

low noise in applications requiring output voltages ≤

• Requires Minimum External Components

2.0V.

• Stable With Low-ESR Output Capacitor

Using an optimized VIP (Vertically Integrated PNP)

• <1 µA Quiescent Current When Shut Down

process, the LP2985LV-N delivers unequaled

performance in all specifications critical to battery-

• Low Ground Pin Current at all Loads

powered designs:

• Output Voltage Accuracy 1% (A Grade)

Ground Pin Current: Typically 825 µA @ 150 mA

• High Peak Current Capability

load, and 75 µA @ 1 mA load.

• Wide Supply Voltage Range (16V Max)

Enhanced Stability: The LP2985LV-N is stable with

• Low Z

OUT

: 0.3Ω Typical (10 Hz to 1 MHz)

output capacitor ESR as low as 5 mΩ, which allows

• Overtemperature/Overcurrent Protection

the use of ceramic capacitors on the output.

• −40°C to +125°C Junction Temperature Range

Sleep Mode: Less than 1 µA quiescent current when

• Custom Voltages Available

ON/OFF pin is pulled low.

Smallest Possible Size: DSBGA package uses

APPLICATIONS

absolute minimum board space.

• Cellular Phone

Precision Output: 1% tolerance output voltages

• Palmtop/Laptop Computer

available (A grade).

• Personal Digital Assistant (PDA)

Low Noise: By adding a 10 nF bypass capacitor,

• Camcorder, Personal Stereo, Camera

output noise can be reduced to 30 µV (typical).

Block Diagram

Figure 1.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (22 pages)

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LP2985LV-N www.ti.com SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 LP2985LV-N Micropower 150 mA Low-Noise Low-Dropout Regulator in SOT-23 and DSBGA packages for Applications with Output Voltages ≤ 2.0V Designed for Use with Very Low ESR Output Capacitors Check for Samples: LP2985LV-N FEATURES DESCRIPTION • • • • • • • • • • • • • The LP2985LV-N is a 150 mA, fixed-output voltage regulator designed to provide high performance and low noise in applications requiring output voltages ≤ 2.0V.
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LP2985LV-N SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 www.ti.com Basic Application Circuit *ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used. **Minimum capacitance is shown to ensure stability (may be increased without limit). Ceramic capacitor required for output (see APPLICATION HINTS). ***Reduces output noise (may be omitted if application is not noise critical). Use ceramic or film type with very low leakage current (see APPLICATION HINTS). Figure 2.
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LP2985LV-N www.ti.com SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 ABSOLUTE MAXIMUM RATINGS (1) (2) Storage Temperature Range −65°C to +150°C Operating Junction Temperature Range −40°C to +125°C Lead Temp. (Soldering, 5 sec.) 260°C ESD Rating (3) Power Dissipation 2 kV (4) Internally Limited −0.3V to +16V Input Supply Voltage (Survival) Input Supply Voltage (Operating) 2.2V to +16V −0.3V to +16V Shutdown Input Voltage (Survival) Output Voltage (Survival (5)) −0.
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LP2985LV-N SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS (1) Limits in standard typeface are for TJ = 25°C. and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 µF, COUT = 4.7 µF, VON/OFF = 2V. Symbol Parameter Output Voltage Tolerance ΔVO Output Voltage Line Regulation IGND Conditions Typ LP2985AI-X.X (2) Min Max Min Max IL = 1 mA −1.0 1.0 −1.5 1.
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LP2985LV-N www.ti.com SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, VOUT = 1.8V, TA = 25°C, ON/OFF pin is tied to VIN VOUT vs Temperature Short-Circuit Current Figure 5. Figure 6. Short-Circuit Current Short-Circuit Current vs Output Voltage Figure 7. Figure 8. Ripple Rejection COUT = 4.7µF, Bypass = 10nF Ripple Rejection COUT = 4.7µF, No Bypass Figure 9. Figure 10.
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LP2985LV-N SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, VOUT = 1.8V, TA = 25°C, ON/OFF pin is tied to VIN 6 Output Impedance vs Frequency Output Impedance vs Frequency Figure 11. Figure 12. Noise Density Noise Density Figure 13. Figure 14. Ground Pin vs Load Current Minimum Input Voltage vs Temperature Figure 15. Figure 16.
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LP2985LV-N www.ti.com SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, VOUT = 1.8V, TA = 25°C, ON/OFF pin is tied to VIN Minimum Input Voltage vs Temperature Input Current vs VIN Figure 17. Figure 18. Input Current vs VIN Input Current vs VIN Figure 19. Figure 20. Ground Pin Current vs Temperature Instantaneous Short Circuit Current Figure 21. Figure 22.
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LP2985LV-N SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, VOUT = 1.8V, TA = 25°C, ON/OFF pin is tied to VIN 8 Output Characteristics Load Transient Figure 23. Figure 24. Load Transient Load Transient Figure 25. Figure 26. Line Transient Line Transient Figure 27. Figure 28.
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LP2985LV-N www.ti.com SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VIN = VOUT(NOM) +1, VOUT = 1.8V, TA = 25°C, ON/OFF pin is tied to VIN Line Transient Line Transient Figure 29. Figure 30. Turn-On Time Turn-On Time Figure 31. Figure 32. Turn-On Time Turn-On Time Figure 33. Figure 34.
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LP2985LV-N SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 www.ti.com APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the LP2985LV-N requires external capacitors for regulator stability. These capacitors must be correctly selected for good performance. Input Capacitor An input capacitor whose capacitance is ≥ 1 µF is required between the LP2985LV-N input and ground (the amount of capacitance may be increased without limit).
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LP2985LV-N www.ti.com SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 Noise Bypass Capacitor Connecting a 10 nF capacitor to the Bypass pin significantly reduces noise on the regulator output. It should be noted that the capacitor is connected directly to a high-impedance circuit in the bandgap reference. Because this circuit has only a few microamperes flowing in it, any significant loading on this node will cause a change in the regulated output voltage.
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LP2985LV-N SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 www.ti.com REVERSE INPUT-OUTPUT VOLTAGE The PNP power transistor used as the pass element in the LP2985LV-N has an inherent diode connected between the regulator output and input. During normal operation (where the input voltage is higher than the output) this diode is reverse-biased. VIN VOUT PNP GND Figure 37.
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LP2985LV-N www.ti.com SNOS510P – NOVEMBER 1999 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision O (April 2013) to Revision P • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LP2985AIM5-1.5/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LCHA LP2985AIM5-1.8/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LAYA LP2985AIM5-2.
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PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 1-Nov-2013 Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) LP2985ITPX-1.5/NOPB ACTIVE DSBGA YPB 5 3000 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM LP2985ITPX-1.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LP2985AIM5-1.5/NOPB SOT-23 DBV 5 1000 178.0 8.4 LP2985AIM5-1.8/NOPB SOT-23 DBV 5 1000 178.0 LP2985AIM5-2.0/NOPB SOT-23 DBV 5 1000 178.0 LP2985AIM5X-1.8 SOT-23 DBV 5 3000 LP2985AIM5X-1.8/NOPB SOT-23 DBV 5 LP2985AIM5X-2.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP2985AIM5-1.5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2985AIM5-1.8/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2985AIM5-2.0/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2985AIM5X-1.8 SOT-23 DBV 5 3000 210.0 185.0 35.0 LP2985AIM5X-1.8/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LP2985AIM5X-2.
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MECHANICAL DATA YPB0005 D 0.5±0.045 E TPA05XXX (Rev C) D: Max = 1.159 mm, Min =1.098 mm E: Max = 0.981 mm, Min = 0.92 mm 4215098/A NOTES: A. All linear dimensions are in millimeters. Dimensioning and tolerancing per ASME Y14.5M-1994. B. This drawing is subject to change without notice. www.ti.
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