Datasheet

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LP2966

www.ti.com

SNVS028E –APRIL 2000–REVISED APRIL 2013

Dual 150mA Ultra Low-Dropout Regulator

Check for Samples: LP2966

FEATURES

KEY SPECIFICATIONS

• Ultra Low Drop-Out Voltage

• Dropout Voltage: Varies Linearly with Load

Current. Typically 0.9 mV at 1mA Load Current

• Low Ground Pin Current

and 135mV at 150mA Load Current

• <1µA Quiescent Current in Shutdown Mode

• Ground Pin Current: Typically 300µA at 1mA

• Independent Shutdown of Each LDO Regulator

Load Current and 340µA at 100mA Load

• Output Voltage Accuracy ±1%

Current (with One Shutdown Pin Pulled Low)

• Ensured 150mA Output Current at Each

• Shutdown Mode: Less than 1µA Quiescent

Output

Current when Both Shutdown Pins are Pulled

• Low Output Noise

Low

• Error Flags Indicate Status of Each Output

• Error Flag: Open Drain Output, Goes Low

• Available in VSSOP-8 Surface Mount Package when the Corresponding Output Drops 10%

Below Nominal

• Low Output Capacitor Requirements (1µF)

• Precision Output Voltage: Multiple Output

• Operates with Low ESR Ceramic Capacitors in

Voltage Options Available Ranging from 1.8V

Most Applications

to 5.0V with an Ensured Accuracy of ±1% at

• Over Temperature/Over Current Protection

Room Temperature

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

DESCRIPTION

APPLICATIONS

The LP2966 dual ultra low-dropout (LDO) regulator

• Cellular and Wireless Applications

operates from a +2.70V to +7.0V input supply. Each

output delivers 150mA over full temperature range.

• Palmtop/Laptop Computer

The IC operates with extremely low drop-out voltage

• GPS Systems

and quiescent current, which makes it very suitable

• Flat Panel Displays

for battery powered and portable applications. Each

LDO in the LP2966 has independent shutdown

• Post Regulators

capability. The LP2966 provides low noise

• USB Applications

performance with low ground pin current in an

• Hand Held Equipment and Multimeters

extremely small VSSOP-8 package (refer to package

dimensions and CONNECTION DIAGRAM for more

• Wireless Data Terminals

information on VSSOP-8 package). A wide range of

• Other Battery Powered Applications

preset voltage options are available for each output.

In addition, many more are available upon request

with minimum orders. In all, 256 voltage combinations

are possible.

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 (21 pages)

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LP2966 www.ti.
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LP2966 SNVS028E – APRIL 2000 – REVISED APRIL 2013 www.ti.com TYPICAL APPLICATION CIRCUIT *SD1 and SD2 must be actively terminated through a pull up resistor. Tie to VIN if not used. **ERROR1 and ERROR2 are open drain outputs. These pins must be connected to ground if not used. # Minimum output capacitance is 1µF to insure stability over full load current range. More capacitance improves superior dynamic performance and provides additional stability margin.
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LP2966 www.ti.com SNVS028E – APRIL 2000 – REVISED APRIL 2013 PIN DESCRIPTIONS Pin Name Function 1 VIN Input Supply pin 2 SD1 Active low shutdown pin for output 1 3 SD2 Active low shutdown pin for output 2 4 GND Ground 5 ERROR2 Error flag for output 2 - Normally high impedance, should be connected to ground if not used. 6 ERROR1 Error flag for output 1 - Normally high impedance, should be connected to ground if not used.
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LP2966 SNVS028E – APRIL 2000 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS Limits in standard typeface are for Tj = 25°C, and limits in boldface type apply over the full operating junction temperature range. Unless otherwise specified, VIN = VO(NOM) + 1V (1), COUT = 1µF, IOUT = 1mA, CIN = 1µF, VSD1 = VSD2 = VIN. Symbol Vo (4) Parameter Output Voltage Tolerance Conditions VOUT + 1V < VIN < 7.
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LP2966 www.ti.com SNVS028E – APRIL 2000 – REVISED APRIL 2013 ELECTRICAL CHARACTERISTICS (continued) Limits in standard typeface are for Tj = 25°C, and limits in boldface type apply over the full operating junction temperature range. Unless otherwise specified, VIN = VO(NOM) + 1V(1), COUT = 1µF, IOUT = 1mA, CIN = 1µF, VSD1 = VSD2 = VIN.
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LP2966 SNVS028E – APRIL 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified, VIN =VO(NOM) + 1V, VOUT= 3.3V, COUT =1µF, IOUT = 1mA, CIN =1µF, VSD1 = VSD2 = VIN, and TA = 25°C. 6 Ground Pin Current vs Supply Voltage (one LDO on) Ground Pin Current vs Supply Voltage (both LDOs on) Figure 2. Figure 3. Ground Pin Current vs Load Current over temperature (one LDO on) Ground Pin Current vs Load Current over temperature (both LDOs on) Figure 4. Figure 5.
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LP2966 www.ti.com SNVS028E – APRIL 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, VIN =VO(NOM) + 1V, VOUT= 3.3V, COUT =1µF, IOUT = 1mA, CIN =1µF, VSD1 = VSD2 = VIN, and TA = 25°C. Input Voltage vs Output Voltage Ground Pin Current vs Shutdown Pin Voltage Figure 8. Figure 9. Ground Pin Current vs Input Voltage (Both LDOs off) Short-Circuit Foldback Protection Figure 10. Figure 11. Line Transient Response (COUT = 2.
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LP2966 SNVS028E – APRIL 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, VIN =VO(NOM) + 1V, VOUT= 3.3V, COUT =1µF, IOUT = 1mA, CIN =1µF, VSD1 = VSD2 = VIN, and TA = 25°C. 8 Line Transient Response (COUT = 2.2µF, IOUT = 100mA) Line Transient Response (COUT = 2.2µF, IOUT = 100mA) Figure 14. Figure 15. Line Transient Response (COUT = 10µF, IOUT = 1mA) Line Transient Response (COUT = 10µF, IOUT = 1mA) Figure 16. Figure 17.
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LP2966 www.ti.com SNVS028E – APRIL 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, VIN =VO(NOM) + 1V, VOUT= 3.3V, COUT =1µF, IOUT = 1mA, CIN =1µF, VSD1 = VSD2 = VIN, and TA = 25°C. Load Transient Response (COUT = 2.2µF) Load Transient Response (COUT = 10µF) Figure 20. Figure 21. Load Transient Response (COUT = 10µF) Load Transient Response (COUT = 2.2µF) Figure 22. Figure 23.
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LP2966 SNVS028E – APRIL 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, VIN =VO(NOM) + 1V, VOUT= 3.3V, COUT =1µF, IOUT = 1mA, CIN =1µF, VSD1 = VSD2 = VIN, and TA = 25°C. 10 Output Voltage Cross-Coupling Output Noise Density Figure 26. Figure 27. Power Supply Ripple Rejection Peak Output Current vs Temperature Figure 28. Figure 29.
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LP2966 www.ti.com SNVS028E – APRIL 2000 – REVISED APRIL 2013 APPLICATIONS INFORMATION Input Capacitor Selection LP2966 requires a minimum input capacitance of 1µF between the input and ground pins to prevent any impedance interactions with the supply. This capacitor should be located very close to the input pin. This capacitor can be of any type such as ceramic, tantalum, or aluminium. Any good quality capacitor which has good tolerance over temperature and frequency is recommended.
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LP2966 SNVS028E – APRIL 2000 – REVISED APRIL 2013 www.ti.com The primary source of noise in low-dropout regulators is the internal reference. In CMOS regulators, noise has a low frequency component and a high frequency component, which storngly depend on the silicon area and quiescent current. Noise can be reduced in two ways: by increasing the transistor area or by increasing the current drawn by the internal reference.
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LP2966 www.ti.com SNVS028E – APRIL 2000 – REVISED APRIL 2013 Drop-Out Voltage The drop-out voltage of a regulator is defined as the minimum input-to-output differential required to stay within 100mV of the output voltage measured with a 1V differential. The LP2966 uses an internal MOSFET with an Rds(on) of 1Ω. For CMOS LDOs, the drop-out voltage is the product of the load current and the Rds(on) of the internal MOSFET. Reverse Current Path The internal MOSFET in the LP2966 has an inherent parasitic diode.
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LP2966 SNVS028E – APRIL 2000 – REVISED APRIL 2013 14 www.ti.com Figure 34. Figure 35. Figure 36. Figure 37.
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LP2966 www.ti.com SNVS028E – APRIL 2000 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision D (April 2013) to Revision E • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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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) W Pin1 (mm) Quadrant LP2966IMM-1833/NOPB VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LP2966IMM-2518/NOPB VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LP2966IMM-2525 VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.
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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) LP2966IMM-1833/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LP2966IMM-2518/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LP2966IMM-2525 VSSOP DGK 8 1000 210.0 185.0 35.0 LP2966IMM-2525/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LP2966IMM-2828/NOPB VSSOP DGK 8 1000 210.0 185.0 35.
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