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OUT

GND

LP38513-ADJ

OUT

10 PF

Ceramic

OUT

10 PF

Ceramic

GND

OFF

ADJ

LP38513-ADJ

www.ti.com

SNVS514C –JANUARY 2009–REVISED APRIL 2013

LP38513-ADJ 3A Fast-Transient Response Adjustable Low-Dropout Linear Voltage

Regulator

Check for Samples: LP38513-ADJ

FEATURES

APPLICATIONS

• 2.25V to 5.5V Input Voltage Range

• Digital Core ASICs, FPGAs, and DSPs

• Adjustable Output Voltage Range of 0.5V to • Servers

4.5V

• Routers and Switches

• 3.0A Output Load Current

• Base Stations

• ±2.0% Accuracy over Line, Load, and Full-

• Storage Area Networks

Temperature Range from -40°C to +125°C

• DDR2 Memory

• Stable with tiny 10 µF ceramic capacitors

• Enable pin DESCRIPTION

The LP38513-ADJ Fast-Transient Response Low-

• Typically less than 1 µA of Ground pin current

Dropout Voltage Regulator offers the highest-

when Enable pin is low

performance in meeting AC and DC accuracy

• 25dB of PSRR at 100 kHz

requirements for powering Digital Cores. The

• Over-Temperature and Over-Current

LP38513-ADJ uses a proprietary control loop that

Protection

enables extremely fast response to change in line

conditions and load demands. Output Voltage DC

• TO-263 THIN 5-Pin Surface Mount Package

accuracy at 2.5% over line, load and full temperature

range from -40°C to +125°C. The LP38513-ADJ is

designed for inputs from the 2.5V, 3.3V, and 5.0V rail,

is stable with 10 μF ceramic capacitors, and has an

adjustable output voltage. The LP38513-ADJ

provides excellent transient performance to meet the

demand of high performance digital core ASICs,

DSPs, and FPGAs found in highly-intensive

applications such as servers, routers/switches, and

base stations.

Typical Application Circuit

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 (18 pages)

PAGE 1
LP38513-ADJ www.ti.com SNVS514C – JANUARY 2009 – REVISED APRIL 2013 LP38513-ADJ 3A Fast-Transient Response Adjustable Low-Dropout Linear Voltage Regulator Check for Samples: LP38513-ADJ FEATURES APPLICATIONS • • • • • • • • 1 2 • • • • • • • • 2.25V to 5.5V Input Voltage Range Adjustable Output Voltage Range of 0.5V to 4.5V 3.0A Output Load Current ±2.
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LP38513-ADJ SNVS514C – JANUARY 2009 – REVISED APRIL 2013 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
PAGE 3
LP38513-ADJ www.ti.com SNVS514C – JANUARY 2009 – REVISED APRIL 2013 ABSOLUTE MAXIMUM RATINGS (1) −65°C to +150°C Storage Temperature Range Soldering Temperature (2) Thin TO-263 ESD Rating 260°C, 10s (3) Power Dissipation ±2 kV (4) Internally Limited Input Pin Voltage (Survival) -0.3V to +6.0V Enable Pin Voltage (Survival) -0.3V to +6.0V Output Pin Voltage (Survival) -0.3V to +6.0V ADJ Pin Voltage (Survival) -0.3V to +6.
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LP38513-ADJ SNVS514C – JANUARY 2009 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS Unless otherwise specified: VIN= 2.50V, VOUT = VADJ, IOUT= 10 mA, CIN= 10 µF, COUT= 10 µF, VEN= 2.0V. Limits in standard type are for TJ= 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation.
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LP38513-ADJ www.ti.com SNVS514C – JANUARY 2009 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified: TJ = 25°C, VIN = 2.50V, VOUT = VADJ, VEN = 2.0V, CIN = 10 µF, COUT = 10 µF, IOUT = 10 mA. VADJ vs Temperature VOUT vs VIN Figure 1. Figure 2. Ground Pin Current (IGND) vs VIN Ground Pin Current (IGND) vs Temperature Figure 3. Figure 4. Ground Pin Current (IGND) vs Temperature Enable Threshold vs Temperature Figure 5. Figure 6.
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LP38513-ADJ SNVS514C – JANUARY 2009 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: TJ = 25°C, VIN = 2.50V, VOUT = VADJ, VEN = 2.0V, CIN = 10 µF, COUT = 10 µF, IOUT = 10 mA. 6 VOUT vs VEN Load regulation vs Temperature Figure 7. Figure 8. Line Regulation vs Temperature Current Limit vs Temperature Figure 9. Figure 10. Load Transient, 10mA to 3A VOUT = VADJ, COUT = 10 μF Ceramic Load Transient, 10 mA to 3A VOUT = 1.
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LP38513-ADJ www.ti.com SNVS514C – JANUARY 2009 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: TJ = 25°C, VIN = 2.50V, VOUT = VADJ, VEN = 2.0V, CIN = 10 µF, COUT = 10 µF, IOUT = 10 mA. Load Transient, 1A to 3A VOUT = 1.20V, COUT = 10 μF Ceramic Line Transient VOUT = VADJ, COUT = 10 μF Ceramic Figure 13. Figure 14. Line Transient VOUT = 1.20V, COUT = 10 μF Ceramic PSRR, IOUT = 100 mA VOUT = VADJ, COUT = 10 μF Ceramic Figure 15. Figure 16.
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LP38513-ADJ SNVS514C – JANUARY 2009 – REVISED APRIL 2013 www.ti.
PAGE 9
LP38513-ADJ www.ti.com SNVS514C – JANUARY 2009 – REVISED APRIL 2013 APPLICATION INFORMATION EXTERNAL CAPACITORS Like any low-dropout regulator, external capacitors are required to assure stability. These capacitors must be correctly selected for proper performance. Input Capacitor A ceramic input capacitor of at least 10 µF is required. For general usage across all load currents and operating conditions, a 10 µF ceramic input capacitor will provide satisfactory performance.
PAGE 10
LP38513-ADJ SNVS514C – JANUARY 2009 – REVISED APRIL 2013 www.ti.com SETTING THE OUTPUT VOLTAGE The output voltage is set using the external resistive divider R1 and R2. The output voltage is given by the formula: VOUT = VADJ x (1 + (R1/R2)) (1) The resistors used for R1 and R2 should be high quality, tight tolerance, and with matching temperature coefficients. It is important to remember that, although the value of VADJ is specified, the final value of VOUT is not.
PAGE 11
LP38513-ADJ www.ti.com SNVS514C – JANUARY 2009 – REVISED APRIL 2013 Table 1. VOUT R1 R2 CFF FZ 0.80V 1.07 kΩ 1.78 kΩ 4700 pF 31.6 kHz 1.00V 1.00 kΩ 1.00 kΩ 4700 pF 33.8 kHz 1.20V 1.40 kΩ 1.00 kΩ 3300 pF 34.4 kHz 1.50V 2.00 kΩ 1.00 kΩ 2700 pF 29.5 kHz 1.80V 2.94 kΩ 1.13 kΩ 1500 pF 36.1 kHz 2.00V 1.02 kΩ 340Ω 4700 pF 33.2 kHz 2.50V 1.02 kΩ 255Ω 4700 pF 33.2 kHz 3.00V 1.00 kΩ 200Ω 4700 pF 33.8 kHz 3.30V 2.00 kΩ 357Ω 2700 pF 29.
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LP38513-ADJ SNVS514C – JANUARY 2009 – REVISED APRIL 2013 www.ti.com LP38513-ADJ is available in the TO-263 THIN surface mount package. For a comparison of the TO-263 THIN package to the standard TO-263 package see Application Note AN-1797 TO-263 THIN Package SNVA328. The thermal resistance depends on amount of copper area, or heat sink, and on air flow. See Application Note AN1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages SNVA183 for guidelines.
PAGE 13
LP38513-ADJ www.ti.com SNVS514C – JANUARY 2009 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision B (April 2013) to Revision C • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 14
PACKAGE OPTION ADDENDUM www.ti.com 21-May-2013 PACKAGING INFORMATION Orderable Device Status (1) LP38513TJ-ADJ/NOPB ACTIVE Package Type Package Pins Package Drawing Qty TO-263 NDQ 5 1000 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Device Marking (3) CU SN Level-1-260C-UNLIM (4/5) -40 to 125 LP38513 TJ-ADJ (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 15
PACKAGE MATERIALS INFORMATION www.ti.com 29-May-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device LP38513TJ-ADJ/NOPB Package Package Pins Type Drawing TO-263 NDQ 5 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 1000 330.0 24.4 Pack Materials-Page 1 10.6 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 15.4 2.45 12.0 24.
PAGE 16
PACKAGE MATERIALS INFORMATION www.ti.com 29-May-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP38513TJ-ADJ/NOPB TO-263 NDQ 5 1000 367.0 367.0 35.
PAGE 17
MECHANICAL DATA NDQ0005A TJ5A (Rev F) www.ti.
PAGE 18
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.