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LMZ12001EXT

www.ti.com

SNVS661F –JUNE 2010–REVISED OCTOBER 2013

LMZ12001EXT 1A SIMPLE SWITCHER® Power Module with 20V Maximum Input Voltage

for Military and Rugged Applications

Check for Samples: LMZ12001EXT

KEY FEATURES

ELECTRICAL SPECIFICATIONS

• -55°C to 125°C Junction Temperature Range

• 6W Maximum Total Power Output

• Integrated Shielded Inductor

• Up to 1A Output Current

• Simple PCB Layout

• Input Voltage Range 4.5V to 20V

• Flexible Startup Sequencing Using External

• Output Voltage Range 0.8V to 6V

Soft-start Capacitor and Precision Enable

• Efficiency up to 92%

• Protection Against Inrush Currents and Faults

such as Input UVLO and Output Short Circuit

PERFORMANCE BENEFITS

• Single Exposed Pad and Standard Pinout for

• Low Radiated Emissions / High Radiated

Easy Mounting and Manufacturing

Immunity

• Fast Transient Response for FPGAs and

• Passes Vibration Standard MIL-STD-883

ASICs

Method 2007.2 Condition A JESD22–B103B

• Low Output Voltage Ripple

Condition 1

• Pin-to-Pin Compatible Family:

• Passes Drop standard MIL-STD-883 Method

– LMZ14203EXT/2EXT/1EXT (42V Max 3A, 2A,

2002.3 Condition B JESD22–B110 Condition B

1A)

– LMZ14203/2/1 (42V Max 3A, 2A, 1A)

DESCRIPTION

– LMZ12003/2/1 (20V Max 3A, 2A, 1A)

The LMZ12001EXT SIMPLE SWITCHER® power

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

• Fully Webench® Power Designer Enabled

capable of driving up to 1A load with exceptional

power conversion efficiency, line and load regulation,

APPLICATIONS

and output accuracy. The LMZ12001EXT is available

• Point of Load Conversions from 5V and 12V

in an innovative package that enhances thermal

Input Rail

performance and allows for hand or machine

soldering.

• Time Critical Projects

• Space Constrained High Thermal Requirement

The LMZ12001EXT can accept an input voltage rail

Applications

between 4.5V and 20V and deliver an adjustable and

highly accurate output voltage as low as 0.8V. The

• Negative Output Voltage Applications (See AN-

LMZ12001EXT only requires three external resistors

2027 SNVA425)

and four external capacitors to complete the power

solution. The LMZ12001EXT is a reliable and robust

design with the following protection features: thermal

shutdown, input under-voltage lockout, output over-

voltage protection, short-circuit protection, output

current limit, and allows startup into a pre-biased

output. A single resistor adjusts the switching

frequency up to 1 MHz.

Figure 1. Easy to use PFM 7-Pin package

See NDW0007A Package

RoHS Compliant

Peak Reflow Case Temp = 245⁰⁰C

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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LMZ12001EXT www.ti.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com System Performance 100 EFFICIENCY (%) 90 80 70 60 25°C 50 0.4 0.2 0 0.6 1 0.8 OUTPUT CURRENT (A) Figure 2. Efficiency VIN = 12V 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) Figure 3. Thermal Derating Curve VIN = 12V VOUT = 5.0V RADIATED EMISSIONS (dBµV/m) 80.0 70.0 60.0 50.0 EN 55022 CLASS B LIMIT 40.0 30.0 20.0 10.0 0.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 Simplified Application Schematic VOUT FB SS GND VIN EN VIN RON LMZ12001EXT VOUT @ 1A CFF RON RFBT Enable CIN CSS COUT RFBB Connection Diagram Figure 5. 7-Pin PFM (Top View) See NDW0007A Package PIN DESCRIPTIONS Pin Name Description 1 VIN Supply input — Nominal operating range is 4.5V to 20V . A small amount of internal capacitance is contained within the package assembly.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Absolute Maximum Ratings (1) (2) VIN, RON to GND -0.3V to 25V 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 Peak Reflow Case Temperature (30 sec) 245°C For soldering specifications, refer to the following document: SNOA549 (1) (2) (3) Absolute Maximum Ratings are limits beyond which damage to the device may occur.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 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 -55°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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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 4.5V Input @ 25°C Dissipation 4.5V Input @ 25°C 100 0.3 95 80 DISSIPATION (W) EFFICIENCY (%) 1.8 1.5 1.2 0.8 85 75 70 65 60 1.5 0.2 0.15 1.2 0.8 0.1 0.05 55 50 1.8 0.25 90 25°C 25°C 0 0.2 0.4 0.6 0.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 8V Input @ 25°C Dissipation 8V Input @ 25°C 100 0.35 95 5.0 3.3 2.5 1.8 1.5 1.2 0.8 85 80 0.25 DISSIPATION (W) EFFICIENCY (%) 90 5.0 3.3 2.5 1.8 1.5 0.3 75 70 65 0.2 1.2 0.15 0.8 0.1 60 25°C 0.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 4.5V Input @ 85°C Dissipation 4.5V Input @ 85°C 0.45 100 95 0.375 1.8 1.5 1.2 85 80 DISSIPATION (W) EFFICIENCY (%) 90 75 70 65 0.225 1.2 0.15 85°C 60 0.075 55 50 1.8 1.5 0.3 85°C 0 0.2 0.4 0.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Efficiency 8V Input @ 85°C Dissipation 8V Input @ 85°C 100 0.45 95 5.0 3.3 2.5 1.8 1.5 1.2 85 80 DISSIPATION (W) EFFICIENCY (%) 90 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.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Line and Load Regulation @ 85°C 1.815 1.804 1.812 1.800 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Line and Load Regulation @ 25°C 1.808 6 5 1.796 12 1.792 20 25°C 1.788 0 0.2 0.4 0.8 0.6 6 1.809 5 12 1.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = 12V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tambient = 25 C for efficiency curves and waveforms. Current Limit 3.3VOUT @25°C 2.3 OUTPUT CURRENT (A) 2.3 SHORT CIRCUIT CURRENT (A) Current Limit 1.8VOUT @85°C 2.4 2.4 2.2 2.1 2.0 ONSET SHORT CIRCUIT 2.2 2.1 2 ONSET 1.9 1.9 85C 25°C 1.8 1.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com APPLICATION BLOCK DIAGRAM Vin VIN 1 Linear reg Cvcc 5 CIN SS Css CBST 3 EN RON 2 VOUT 7 RON Timer CFF 6 6.8 éH VO Co FB RFBT RFBB 0.47 éF Regulator IC Internal Passives GND 4 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.
PAGE 13
LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 The LMZ12001EXT demonstration and evaluation boards use 11.8kΩ for RENB and 32.4kΩ for RENT resulting in a rising UVLO of 4.5V. This divider presents 5.34V to the EN input when the divider input is raised to 20V. 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 voltage at FB is compared to a 0.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com The following equation provides a good first pass approximation of CO for load transient requirements: CO ≥ ISTEP*VFB*L*VIN/ (4*VO*(VIN—VO)*VOUT-TRAN) (6) Solving: CO ≥ 1A*0.8V*10μH*12V / (4*3.3V*( 12V — 3.3V)*33mV) ≥ 25μF The LMZ12001EXT demonstration and evaluation boards are populated with a 100 uF 6.3V X5R output capacitor. Locations for other output capacitors are provided.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 RON ≥ VIN(MAX) * 150 nsec / (1.3 * 10 -10) (13) If RON calculated in Equation 10 is less than the minimum value determined in Equation 13 a lower frequency should be selected. Alternatively, VIN(MAX) can also be limited in order to keep the frequency unchanged. Additionally note, the minimum off-time of 260 ns limits the maximum duty ratio. Larger RON (lower FSW) should be selected in any application requiring large duty ratio.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com The inductor internal to the module is 10 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)/(10µH*fSW*VIN) where • VIN is the maximum input voltage and fSW is determined from Equation 9.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 2. Have a single point ground. The ground connections for the feedback, soft-start, and enable components should be routed to the GND pin of the device. This prevents any switched or load currents from flowing in the analog ground traces. If not properly handled, poor grounding can result in degraded load regulation or erratic output voltage ripple behavior. Provide the single point ground connection from pin 4 to EP. 3.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com ZERO COIL CURRENT DETECTION The current of the lower (synchronous) MOSFET is monitored by a zero coil current detection circuit which inhibits the synchronous MOSFET when its current reaches zero until the next on-time. This circuit enables the DCM operating mode, which improves efficiency at light loads. PRE-BIASED STARTUP The LMZ12001EXT will properly start up into a pre-biased output.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 Ref Des Description Case Size Manufacturer Manufacturer P/N U1 SIMPLE SWITCHER ® PFM Texas Instruments LMZ12001EXTTZ-ADJ Cin1 1 µF, 50V, X7R 1206 Taiyo Yuden UMK316B7105KL-T Cin2 10 µF, 50V, X7R 1210 Taiyo Yuden UMK325BJ106MM-T CO1 1 µF, 50V, X7R 1206 Taiyo Yuden UMK316B7105KL-T CO2 100 µF, 6.3V, X7R 1210 Taiyo Yuden JMK325BJ10CR7MM-T RFBT 1.37 kΩ 0603 Vishay Dale CRCW06031K37FKEA RFBB 1.
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LMZ12001EXT SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 www.ti.
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LMZ12001EXT www.ti.com SNVS661F – JUNE 2010 – REVISED OCTOBER 2013 REVISION HISTORY Changes from Revision E (April 2013) to Revision F Page • Added Peak Reflow Case Temp = 245⁰C ............................................................................................................................ 1 • Changed 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 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 LMZ12001EXTTZ/NOPB TOPMOD NDW 7 250 330.0 24.4 10.6 14.22 5.0 16.0 24.0 Q2 LMZ12001EXTTZX/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 26-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMZ12001EXTTZ/NOPB TO-PMOD NDW 7 250 367.0 367.0 45.0 LMZ12001EXTTZX/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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