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LMZ14201

www.ti.com

SNVS649F –JANUARY 2010–REVISED OCTOBER 2013

LMZ14201 1A SIMPLE SWITCHER® Power Module with 42V Maximum Input Voltage

Check for Samples: LMZ14201

FEATURES

DESCRIPTION

• Integrated Shielded Inductor

The LMZ14201 SIMPLE SWITCHER power module

• Simple PCB Layout

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

of driving up to 1A load with exceptional power

• Flexible Startup Sequencing Using External

conversion efficiency, line and load regulation, and

Soft-start and Precision Enable

output accuracy. The LMZ14201 is available in an

• Protection Against Inrush Currents and Faults

innovative package that enhances thermal

such as Input UVLO and Output Short Circuit

performance and allows for hand or machine

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

soldering.

• Single Exposed Pad and Standard Pinout for

The LMZ14201 can accept an input voltage rail

Easy Mounting and Manufacturing

between 6V and 42V and deliver an adjustable and

highly accurate output voltage as low as 0.8V. The

• Fast Transient Response for Powering FPGAs

LMZ14201 only requires three external resistors and

and ASICs

four external capacitors to complete the power

• Low Output Voltage Ripple

solution. The LMZ14201 is a reliable and robust

• Pin-to-pin Compatible Family:

design with the following protection features: thermal

shutdown, input under-voltage lockout, output over-

– LMZ14203/2/1 (42V Max 3A, 2A, 1A)

voltage protection, short-circuit protection, output

– LMZ12003/2/1 (20V Max 3A, 2A, 1A)

current limit, and allows startup into a pre-biased

• Fully Enabled for Webench® Power Designer

output. A single resistor adjusts the switching

frequency up to 1 MHz.

APPLICATIONS

ELECTRICAL SPECIFICATIONS

• Point of Load Conversions from 12V and 24V

Input Rail

• 6W Maximum Total Output Power

• Time Critical Projects

• Up to 1A Output Current

• Space Constrained / High Thermal

• Input Voltage Range 6V to 42V

Requirement Applications

• Output Voltage Range 0.8V to 6V

• Negative Output Voltage Applications

• Efficiency up to 90%

(See AN-2027) SNVA425

PERFORMANCE BENEFITS

• Operates at High Ambient Temperature with

no Thermal Derating

• High Efficiency Reduces System Heat

Generation

• Low Radiated Emissions (EMI) Complies with

EN55022 Class B Standard

• Low External Component Count

Figure 1. Easy To Use PFM 7 Pin Package

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

= 20°C/W, θ

= 1.9°C/W

RoHS Compliant

Peak Reflow Case Temp = 245°C

Power Module SMT Guidelines

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 (27 pages)

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LMZ14201 www.ti.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com System Performance Efficiency VIN = 24V VOUT = 5.0V 100 95 EFFICIENCY (%) 90 85 80 75 70 65 60 55 50 0 0.4 0.2 0.6 0.8 1 OUTPUT CURRENT (A) Thermal Derating Curve VIN = 24V, VOUT = 5.0V, 1.2 OUTPUT CURRENT (A) 1 0.8 0.6 0.4 0.2 0 50 60 70 80 90 100 110 120 AMBIENT TEMPERATURE (°C) Radiated Emissions (EN 55022 Class B) from Evaluation Board RADIATED EMISSIONS (dBµV/m) 80.0 70.0 60.0 50.0 EN 55022 CLASS B LIMIT 40.0 30.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Simplified Application Schematic VOUT FB SS EN VIN GND VIN RON LMZ14201 VOUT RFBT 5V 3.3V 2.5V 1.8V 1.5V 1.2V 0.8V 5.62k 3.32k 2.26k 1.87k 1.00k 4.22k 0 RFBB 1.07k 1.07k 1.07k 1.50k 1.13k 8.45k 39.2k RON VIN Range 100k 61.9k 47.5k 32.4k 28.0k 22.6k 24.9k 7.5...42V 6...42V 6...30V 6...25V 6...21V 6...19V 6...18V VOUT @ 1A CFF RON 0.022 PF RFBT See Table Enable See Table CIN CSS RFBB 10 PF 0.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Absolute Maximum Ratings www.ti.com (1) (2) VIN, RON to GND -0.3V to 43.5V EN, FB, SS to GND -0.3V to 7V Junction Temperature 150°C Storage Temperature Range -65°C to 150°C ESD Susceptibility (3) ± 2 kV For soldering specifications: see product folder at www.ti.com and SNOA549 (1) (2) (3) Absolute Maximum Ratings are limits beyond which damage to the device may occur.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Electrical Characteristics 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 ensured 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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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 6V Input @ 25°C 95 3.3 2.5 1.8 1.5 1.2 0.8 85 80 75 70 65 1.8 1.5 0.2 1.2 0.8 0.15 0.1 60 25°C 0.05 55 50 3.3 2.5 0.25 DISSIPATION (W) EFFICIENCY (%) 90 Dissipation 6V Input @ 25°C 0.3 100 25°C 0 0 0.2 0.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 36V Input @ 25°C Dissipation 36V Input @ 25°C 1.2 100 95 1.0 6.0 5.0 85 DISSIPATION (W) EFFICIENCY (%) 90 80 3.3 75 70 65 60 0.6 3.3 0.4 0.2 55 50 6.0 5.0 0.8 25°C 25°C 0 0 0.2 0.4 0.6 0.8 0.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 8V Input 85°C 95 5.0 3.3 2.5 1.8 1.5 1.2 85 80 75 70 65 0.3 0.225 1.2 0.15 85°C 60 0.075 55 50 5.0 3.3 2.5 1.8 1.5 0.375 DISSIPATION (W) EFFICIENCY (%) 90 Dissipation 8V Input 85°C 0.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 36V Input @ 85°C 100 Dissipation 36V Input @ 85°C 1.2 95 80 6.0 5.0 75 3.3 DISSIPATION (W) EFFICIENCY (%) 85 70 65 60 0.8 0.6 3.3 0.4 0.2 55 50 6.0 5.0 1.0 90 85°C 0 0.4 0.2 0.6 0.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Output Ripple 24VIN 3.3VO 1A, BW = 200 MHz Transient Response 24VIN 3.3VO 0.5A to 1A Step 0.5 A/Div 20 mV/Div Figure 27. Figure 28. Thermal Derating VOUT = 3.3V 1.2 Current Limit 1.8VOUT@ 25°C 2.4 1 2.3 0.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 APPLICATION BLOCK DIAGRAM Vin VIN 1 Linear reg CIN Cvcc 5 SS Css CBST 3 EN RON 2 VOUT 7 RON Timer CFF 6 10 PH VO Co FB RFBT RFBB 0.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com COT CONTROL CIRCUIT OVERVIEW Constant On Time control is based on a comparator and an on-time one shot, with the output voltage feedback compared with an internal 0.8V reference. If the feedback voltage is below the reference, the main MOSFET is turned on for a fixed on-time determined by a programming resistor RON. RON is connected to VIN such that ontime is reduced with increasing input supply voltage.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 For VO = 0.8V the FB pin can be connected to the output directly so long as an output preload resistor remains that draws more than 20uA. Converter operation requires this minimum load to create a small inductor ripple current and maintain proper regulation when no load is present. A feed-forward capacitor is placed in parallel with RFBT to improve load step transient response.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com Recommended minimum input capacitance is 10uF X7R ceramic with a voltage rating at least 25% higher than the maximum applied input voltage for the application. It is also recommended that attention be paid to the voltage and temperature deratings of the capacitor selected.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Following is a comparison pair of waveforms of the showing both CCM (upper) and DCM operating modes. Figure 33. CCM and DCM Operating Modes VIN = 12V, VO = 3.3V, IO = 1 A / 0.25 A 500 mA/Div 2.00 Ps/Div The approximate formula for determining the DCM/CCM boundary is as follows: IDCB≊VO*(VIN–VO)/(2*10 μH*fSW(CCM)*VIN) (16) Following is a typical waveform showing the boundary condition. Figure 34.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com As a result, approximately 6 square cm of 1 oz copper on top and bottom layers is required for the PCB design. Additional area will decrease die temperature proportionately. The PCB copper heat sink must be connected to the exposed pad. Approximately thirty six, 8mils thermal vias spaced 59mils (1.5 mm) apart must connect the top copper to the bottom copper.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Additional Features OUTPUT OVER-VOLTAGE COMPARATOR The voltage at FB is compared to a 0.92V internal reference. If FB rises above 0.92V the on-time is immediately terminated. This condition is known as over-voltage protection (OVP). It can occur if the input voltage is increased very suddenly or if the output load is decreased very suddenly. Once OVP is activated, the top MOSFET on-times will be inhibited until the condition clears.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com Evaluation Board Schematic Diagram and BOM U1 EP VIN Enable VOUT 3.3VO @ 1A 7 FB SS 6 GND 5 VIN EN 4 3 2 1 RON LMZ14201TZ-ADJ 6.0V to 42V RENT CFF 68.1k 0.022 PF RON RFBT 61.9k RENB 11.8k 18 CIN2 D1 OPT 10 PF 3.32k CIN1 CSS 1 PF 0.022 PF RFBB 1.
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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 Figure 36.
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LMZ14201 SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 www.ti.com Figure 37. Sample Reflow Profile Table 1. 20 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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LMZ14201 www.ti.com SNVS649F – JANUARY 2010 – REVISED OCTOBER 2013 REVISION HISTORY Changes from Revision E (March 2013) to Revision F Page • Added Peak Reflow Case Temp = 245°C ............................................................................................................................ 1 • Deleted 10mils ......................................................................................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 13-Sep-2014 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device LMZ14201TZ-ADJ/NOPB LMZ14201TZX-ADJ/NOP B 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 TOPMOD NDW 7 250 330.0 24.4 10.6 14.22 5.0 16.0 24.0 Q2 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 26-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMZ14201TZ-ADJ/NOPB TO-PMOD NDW 7 250 367.0 367.0 45.0 LMZ14201TZX-ADJ/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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