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LMZ22005

www.ti.com

SNVS686I –MARCH 2011–REVISED OCTOBER 2013

LMZ22005 5A SIMPLE SWITCHER® Power Module with 20V Maximum Input Voltage

Check for Samples: LMZ22005

FEATURES

DESCRIPTION

• Integrated Shielded Inductor

The LMZ22005 SIMPLE SWITCHER© power module

• Simple PCB Layout

is an easy-to-use step-down DC-DC solution capable

of driving up to 5A load. The LMZ22005 is available

• Frequency Synchronization Input (650 kHz to

in an innovative package that enhances thermal

950 kHz)

performance and allows for hand or machine

• Flexible Startup Sequencing Using External

soldering.

Soft-start, Tracking and Precision Enable

The LMZ22005 can accept an input voltage rail

• Protection Against Inrush Currents and Faults

between 6V and 20V and deliver an adjustable and

such as Input UVLO and Output Short Circuit

highly accurate output voltage as low as 0.8V. The

• – 40°C to 125°C Junction Temperature Range

LMZ22005 only requires two external resistors and

three external capacitors to complete the power

• Single Exposed Pad for Easy Mounting and

solution. The LMZ22005 is a reliable and robust

Manufacturing

design with the following protection features: thermal

• Fast Transient Response for Powering FPGAs

shutdown, input under-voltage lockout, output over-

and ASICs

voltage protection, short-circuit protection, output

• Fully Enabled for Webench® Power Designer

current limit, and allows startup into a pre-biased

output. The sync input allows synchronization over

• Pin Compatible with

the 650 to 950 kHz switching frequency range.

LMZ23605/LMZ23603/LMZ22003

ELECTRICAL SPECIFICATIONS

APPLICATIONS

• 30W Maximum Total Output Power

• Point of Load Conversions from 12V Input Rail

• Up to 5A Output Current

• Time Critical Projects

• Input Voltage Range 6V to 20V

• Space Constrained / High Thermal

Requirement Applications • Output Voltage Range 0.8V to 6V

• Negative Output Voltage Applications • Efficiency up to 92%

(see AN-2027 SNVA425)

PERFORMANCE BENEFITS

• High Efficiency Reduces System Heat

Generation

• Complies with EN55022 Class B

(1)

• Low Component Count, Only 5 External

Components

• Low Output Voltage Ripple

• Uses PCB as Heat Sink, no Airflow Required

Figure 1. Easy to use 7 pin package

10.16 x 13.77 x 4.57 mm (0.4 x 0.542 x 0.18 in)

θJA = 12°C/W, θJC = 1.9°C/W

RoHS Compliant

(1) EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007.

Peak Reflow Case Temp = 245°C

See AN-2125 SNVA473 and layout for information on device

Power Module SMT Guidelines under test. Vin = 12V, Vo = 3.3V, Io = 5A

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 (31 pages)

PAGE 1
LMZ22005 www.ti.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com System Performance Efficiency VIN = 12V VOUT = 5.0V 100 5 90 4 DISSIPATION (W) EFFICIENCY (%) 80 70 60 3 50 40 2 30 20 1 10 0 0 0 1 2 3 4 OUTPUT CURRENT (A) 5 Thermal derating curve VIN = 12V VOUT = 5.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Simplified Application Schematic VOUT SS/TRK FB PGND EN AGND VIN SYNC VIN LMZ22005 VOUT 6V 5V 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.8V RFBT 15.4k 5.62k 3.32k 2.26k 1.87k 1.00k 1.07k 1.62k 0 RFBB 2.37k 1.07k 1.07k 1.07k 1.50k 1.13k 2.05k 6.49k 8.06K VIN Range 10...20V 9...20V 7...20V 6...20V 6...20V 6...20V 6...20V 6...20V 6...20V VOUT @ 5A RFBT Enable See Table CIN CSS 22 PF 0.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Absolute Maximum Ratings www.ti.com (1) (2) VIN to PGND -0.3V to 24V EN, SYNC to AGND -0.3V to 5.5V SS/TRK, FB to AGND -0.3V to 2.5V AGND to PGND -0.3V to 0.3V Junction Temperature 150°C Storage Temperature Range -65°C to 150°C ESD Susceptibility (3) ± 2 kV Peak Reflow Case Temperature (30 sec) 245°C For soldering specifications, refer to the following document: www.ti.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Electrical Characteristics (continued) 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 guaranteed through test, design or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section. Dissipation 6.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section. Dissipation 2.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section. Dissipation 1.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section. Dissipation 6.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section. Dissipation 2.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section. Dissipation 1.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section.
PAGE 13
LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 2 x 10μF + 1μF X7R Ceramic; CO = 220μF Specialty Polymer + 10 uF Ceramic; Tambient = 25° C for waveforms. Efficiency and dissipation plots marked with * have cycle skipping at light loads resulting is slightly higher output ripple – See Design Steps for the LMZ22005 Application section.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com BLOCK DIAGRAM Linear Regulator 2M VIN 1 3 3 CIN EN CBST CINint 1 SYNC CSS 2 800 kHz PWM SS/TRK 3.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 DESIGN STEPS FOR THE LMZ22005 APPLICATION The LMZ22005 is fully supported by Webench® which offers: component selection, electrical and thermal simulations. Additionally there is are evaluation and demonstration boards that may be used a starting point for design. The following list of steps can be used to quickly design the LMZ22005 application.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com OUTPUT VOLTAGE SELECTION Output voltage is determined by a divider of two resistors connected between VO and ground. The midpoint of the divider is connected to the FB input. The regulated output voltage determined by the external divider resistors RFBT and RFBB is: VO = 0.8V * (1 + RFBT / RFBB) (2) Rearranging terms; the ratio of the feedback resistors for a desired output voltage is: RFBT / RFBB = (VO / 0.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 3.3V Master 2.5Vout Int VCC 50 PA Rtkt 226 Rfbt 2.26k SS/TRK FB Rtkb 107 Rfbb 1.07k Figure 47. Tracking Option Input Detail CO SELECTION None of the required CO output capacitance is contained within the module. A minimum value of 200 μF is required based on the values of internal compensation in the error amplifier.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com If ΔVIN is 1% of VIN for a 12V input to 3.3V output application this equals 120 mV and fSW = 812 kHz. CIN≥ 5A * 3.3V/12V * (1– 3.3V/12V) / (812000 * 0.120 V) ≥ 10.2μF Additional bulk capacitance with higher ESR may be required to damp any resonant effects of the input capacitance and parasitic inductance of the incoming supply lines. The LMZ22005 typical applications schematic recommends a 150 μF 50V aluminum capacitor for this function.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 1. Minimize area of switched current loops. From an EMI reduction standpoint, it is imperative to minimize the high di/dt paths during PC board layout as shown in Figure 48 above. The high current loops that do not overlap have high di/dt content that will cause observable high frequency noise on the output pin if the input capacitor (Cin1) is placed at a distance away from the LMZ22005.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com THERMAL PROTECTION The junction temperature of the LMZ22005 should not be allowed to exceed its maximum ratings. Thermal protection is implemented by an internal thermal shutdown circuit which activates at 165 °C (typ) causing the device to enter a low power standby state. In this state the main MOSFET remains off causing VO to fall, and additionally the CSS capacitor is discharged to ground.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 The inductor internal to the module is 3.3 μH. This value was chosen as a good balance between low and high input voltage applications. The main parameter affected by the inductor is the amplitude of the inductor ripple current (ILR). ILR can be calculated with: ILR P-P=VO*(VIN- VO)/(3.3µH*fSW*VIN) (14) Where VIN is the maximum input voltage and fSW is typically 812 kHz.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com Table 1. Typical Application Bill of Materials Ref Des Description Case Size Manufacturer Manufacturer P/N U1 SIMPLE SWITCHER ® PFM-7 Texas Instruments LMZ22005TZ Cin1,5 0.047 µF, 50V, X7R 1206 Yageo America CC1206KRX7R9BB473 Cin2,3 10 µF, 50V, X7R 1210 Taiyo Yuden UMK325BJ106MM-T Cin6 (OPT) CAP, AL, 150µF, 50V Radial G Panasonic EEE-FK1H151P CO1,6 0.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 Figure 52.
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LMZ22005 SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 www.ti.com Figure 53. Sample Reflow Profile Table 2. 24 Probe Max Temp (°C) Reached Max Temp Time Above 235°C Reached 235°C Time Above 245°C Reached 245°C Time Above 260°C Reached 260°C #1 242.5 6.58 0.49 6.39 0.00 – 0.00 – #2 242.5 7.10 0.55 6.31 0.00 7.10 0.00 – #3 241.0 7.09 0.42 6.44 0.00 – 0.
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LMZ22005 www.ti.com SNVS686I – MARCH 2011 – REVISED OCTOBER 2013 REVISION HISTORY Changes from Revision H (March 2013) to Revision I Page • Added Peak Reflow Case Temp = 245°C ............................................................................................................................ 1 • Deleted 10mil ........................................................................................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 7-Oct-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 4-Oct-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 LMZ22005TZE/NOPB TOPMOD NDW 7 250 330.0 24.4 10.6 14.22 5.0 16.0 24.0 Q2 LMZ22005TZX/NOPB TOPMOD NDW 7 500 330.0 24.4 10.6 14.22 5.0 16.0 24.
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PACKAGE MATERIALS INFORMATION www.ti.com 4-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMZ22005TZE/NOPB TO-PMOD NDW 7 250 367.0 367.0 45.0 LMZ22005TZX/NOPB TO-PMOD NDW 7 500 367.0 367.0 45.
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MECHANICAL DATA NDW0007A BOTTOM SIDE OF PACKAGE TOP SIDE OF PACKAGE TZA07A (Rev D) www.ti.
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