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LMZ10505EXT

www.ti.com

SNVS669G –JUNE 2010–REVISED OCTOBER 2013

LMZ10505EXT 5A SIMPLE SWITCHER® Power Module with 5.5V Maximum Input Voltage

for Military and Rugged Applications

Check for Samples: LMZ10505EXT

FEATURES

• Integrated Shielded Inductor

• Flexible Startup Sequencing Using External

Soft-Start, Tracking, and Precision Enable

• Protection Against In-Rush Currents and

Faults such as Input UVLO and Output Short-

Circuit

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

Operating Range

Figure 1. Easy to Use PFM 7 Pin Package

• Single Exposed Pad and Standard Pinout for

10.16 x 13.77 x 4.57 mm (0.4 x 0.39 x 0.18 in)

Easy Mounting and Manufacturing

= 20°C/W, θ

= 1.9°C/W

(1)

RoHS Compliant

• Pin-to-Pin Compatible with

Peak Reflow Case Temp = 245°C

– LMZ10503EXT (3A/15W Max)

Power Module SMT Guidelines

– LMZ10504EXT (4A/20W Max)

• Fully Enable for WEBENCH® and Power

PERFORMANCE BENEFITS

Designer

• Operates at High Ambient Temperatures

• Low Output Voltage Ripple of 10 mV Allows

• Low Radiated Emissions (EMI) Complies with

for Powering Noise-Sensitive Transceiver and

EN55022 Class B Standard

(2)

Signaling ICs

• Passes 10V/m Radiated Immunity EMI Test

• Fast Transient Response for Powering FPGAs

Standard EN61000 4-3

and ASICs

• Passes Vibration Standard

– MIL-STD-883 Method 2007.2 Condition A

APPLICATIONS

– JESD22-B103B Condition 1

• Point-of-load Conversions from 3.3V and 5V

• Passes Drop Standard

Rails

– MIL-STD-883 Method 2002.3 Condition B

• Space Constrained Applications

– JESD22-B110 Condition B

• Extreme Temperatures/No Air Flow

Environments

DESCRIPTION

• Noise Sensitive Applications (i.e. Transceiver,

The LMZ10505EXT SIMPLE SWITCHER® power

Medical)

module is a complete, easy-to-use DC-DC solution

capable of driving up to a 5A load with exceptional

ELECTRICAL SPECIFICATIONS

power conversion efficiency, output voltage accuracy,

• 25W Maximum Total Output Power

line and load regulation. The LMZ10505EXT is

available in an innovative package that enhances

• Up to 5A Output Current

thermal performance and allows for hand or machine

• Input Voltage Range 2.95V to 5.5V

soldering.

• Output Voltage Range 0.8V to 5V

• ±1.63% Feedback Voltage Accuracy Over

Temperature

(1) θ

measured on a 2.25” x 2.25” (5.8 cm x 5.8 cm) four layer

• Efficiency Up to 96%

board. Refer to PCB Layout Diagrams or Evaluation Board

Application Note: AN-2074 SNVA450.

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

See Figure 22 and layout for information on device under test.

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
LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 LMZ10505EXT 5A SIMPLE SWITCHER® Power Module with 5.
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LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com DESCRIPTION (CONTINUED) The LMZ10505EXT can accept an input voltage rail between 2.95V and 5.5V and deliver an adjustable and highly accurate output voltage as low as 0.8V. One megahertz fixed frequency PWM switching provides a predictable EMI characteristic. Two external compensation components can be adjusted to set the fastest response time, while allowing the option to use ceramic and/or electrolytic output capacitors.
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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 Typical Application Circuit VIN VOUT 1 VIN Cin 2 VOUT 6, 7 LMZ10505EXT FB EN SS CO 5 GND 4, EP 3 Rfbt CSS Rcomp Ccomp Rfbb Connection Diagram Exposed Pad Connect to GND 7 VOUT 6 VOUT 5 FB 4 GND 3 SS 2 EN 1 VIN Figure 2. Top View 7-Lead PFM PIN DESCRIPTIONS Pin Number Name 1 VIN A low ESR input capacitance should be located as close as possible to VIN pin and GND pin.
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LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Operating Ratings (1) VIN to GND 2.95V to 5.5V Junction Temperature (TJ) (1) -55°C to 125°C Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.
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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 Electrical Characteristics Specifications with standard typeface are for TJ = 25°C only; limits in bold face type apply over the operating junction temperature range TJ 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. VIN = VEN = 3.
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LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified, the following conditions apply: VIN = VEN = 5.0V, CIN is 47 µF 10V X5R ceramic capacitor; TAMBIENT = 25°C for efficiency curves and waveforms. 6 Load Transient Response VIN = 3.3V, VOUT = 2.5V, IOUT = 0.5A to 4.5A to 0.5A step 20 MHz Bandwidth Limited Refer to Table 5 for BOM, includes optional components Load Transient Response VIN = 5.0V, VOUT = 2.5V, IOUT = 0.5A to 4.
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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = VEN = 5.0V, CIN is 47 µF 10V X5R ceramic capacitor; TAMBIENT = 25°C for efficiency curves and waveforms. Efficiency VOUT = 1.8V Efficiency VOUT = 1.5V Figure 9. Figure 10. Efficiency VOUT = 1.2V Efficiency VOUT = 0.8V Figure 11. Figure 12. Current Derating VIN = 5V, θJA = 20°C / W Current Derating VIN = 3.
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LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = VEN = 5.0V, CIN is 47 µF 10V X5R ceramic capacitor; TAMBIENT = 25°C for efficiency curves and waveforms. Radiated Emissions (EN 55022, Class B) VIN = 5V, VOUT = 2.5V, IOUT = 5A Evaluation Board Startup VOUT = 2.5V, IOUT = 0A Figure 15. Figure 16. Pre-biased Startup VOUT = 2.5V, IOUT = 0A Figure 17.
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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 BLOCK DIAGRAM Design Guideline And Operating Description Design Steps LMZ10505EXT is fully supported by Webench® and offers the following: component selection, performance, electrical, and thermal simulations as well as the Build-It board, for a reduced design time. On the other hand, all external components can be calculated by following the design procedure below. 1. Determine the input voltage and output voltage.
PAGE 10
LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com where the PWM duty cycle, D, is given by: D= VOUT VIN (2) If ΔVIN is 1% of VIN, this equals to 50 mV and fSW = 1 MHz 2.5V ) x (1 - 2.5V) 5V 5V 8 25 µF 1 MHz x 50 mV 5A x ( Cin 8 (3) A second criteria before finalizing the Cin bypass capacitor is the RMS current capability.
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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 (12) (13) In this particular design the output capacitance is determined by the load transient requirements. Table 1 lists some examples of commercially available capacitors that can be used with the LMZ10505EXT. Table 1. Recommended Output Filter Capacitors CO (µF) Voltage (V), RESR (mΩ) Make Manufacturer Part Number Case Size 22 6.3, < 5 Ceramic, X5R TDK C3216X5R0J226M 1206 47 6.
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LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com VIN VOUT VIN Ccomp EN LMZ10505EXT Rfbt Rcomp FB GND Rfbb Table 2. LMZ10505EXT Compensation Component Values (1) VIN (V) CO (µF) 5.0 3.3 (1) ESR (mΩ) Rfbt (kΩ) Ccomp (pF) Rcomp (kΩ) Min Max 22 2 20 200 27 1.5 47 2 20 124 56 1.4 100 1 10 82.5 120 1 150 1 5 63.4 180 1.21 150 10 25 63.4 220 16.5 150 26 50 44.2 220 23.7 220 15 30 63.4 220 23.7 220 31 60 76.8 220 57.
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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 The PCB copper heat sink must be connected to the exposed pad (EP). Approximately thirty six, 8mils thermal vias spaced 59mils (1.5 mm) apart must connect the top copper to the bottom copper. For an extended discussion and formulations of thermal rules of thumb, refer to AN-2020 SNVA419.
PAGE 14
LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Additional Features ENABLE The LMZ10505EXT features an enable (EN) pin and associated comparator to allow the user to easily sequence the LMZ10505EXT from an external voltage rail, or to manually set the input UVLO threshold. The turn-on or rising threshold and hysteresis for this comparator are typically 1.23V and 0.15V respectively.
PAGE 15
LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 where VFB is the internal reference voltage (nominally 0.8V), ISS is the soft-start charging current (nominally 2 µA) and CSS is the external soft-start capacitance. Thus, the required soft-start capacitor per unit output voltage startup time is given by CSS = 2.5 nF / ms (21) For example, a 4 ms soft-start time will yield a 10 nF capacitance. The minimum soft-start capacitance is 680 pF.
PAGE 16
LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com TRACKING - EQUAL SLEW RATES Alternatively, the tracking feature can be used to have similar output voltage ramp rates. This is referred to as simultaneous startup. In this case, the tracking resistors can be determined based on the following equation Rtrkb = 0.8V x Rtrkt VOUT2 - 0.8V (23) and to ensure proper overdrive of the SS pin VOUT2 < 0.8 x V (24) OUT1 For the example case of VOUT1 = 5V and VOUT2 = 2.
PAGE 17
LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 VIN U1 1 2 VOUT VIN EN VOUT 6, 7 CO1 LMZ10505EXT FB Cin1 SS 3 5 GND 4, EP Rfbt CSS Rcomp Ccomp Rfbb Figure 19. Table 3. Bill of Materials, VIN = 3.3V to 5V, VOUT = 2.5V, IOUT (MAX) = 5A, Optimized for Electrolytic Input and Output Capacitance Designator Description Case Size Manufacturer Manufacturer P/N Quantity U1 SIMPLE SWITCHER ® PFM-7 Texas Instruments LMZ10505EXTTZ 1 Cin1 150 µF, 6.3V, 18 mΩ C2, 6.0 x 3.
PAGE 18
LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com U1 Optional VIN 1 2 Cin2 + VOUT VIN EN CO1 LMZ10505EXT Cin1 Ccomp FB 5 CO3 CO2 Rfbt GND 4, EP SS 3 VOUT 6, 7 Rcomp CSS Optional Rfbb Figure 20. Table 5. Bill of Materials, VIN = 3.3V to 5V, VOUT = 2.
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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 U1 VIN 1 + Cin4 Cin3 Cin2 Cin1 CO1 LMZ10505EXT Ren1 Cin5 VOUT 6, 7 VOUT VIN FB EN 2 SS 3 CO2 CO3 5 GND 4, EP Rfbt CSS Rcomp Ccomp Rfbb Figure 21. Table 7. Bill of Materials, VIN = 3.3V to 5V, VOUT = 2.
PAGE 20
LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com U1 VIN 1 VOUT 6, 7 VOUT VIN CO1 LMZ10505EXT Cin3 Cin2 Cin1 2 FB EN SS 3 5 GND 4, EP Rfbt CSS Rcomp Ccomp Rfbb Figure 22. Table 9. Bill of Materials, VIN = 5V, VOUT = 2.
PAGE 21
LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 PCB Layout Diagrams The PCB design is available in the LMZ10505EXT product folder at www.ti.com. Figure 23.
PAGE 22
LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Figure 24. Internal Layer 1 (Ground) Figure 25.
PAGE 23
LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 Figure 26. Bottom Copper Power Module SMT Guidelines The recommendations below are for a standard module surface mount assembly.
PAGE 24
LMZ10505EXT SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 www.ti.com Figure 27. Sample Reflow Profile Table 11. 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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LMZ10505EXT www.ti.com SNVS669G – JUNE 2010 – REVISED OCTOBER 2013 REVISION HISTORY Changes from Revision F (April 2013) to Revision G 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 2-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 LMZ10505EXTTZ/NOPB TOPMOD NDW 7 250 330.0 24.4 10.6 14.22 5.0 16.0 24.0 Q2 LMZ10505EXTTZX/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 2-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMZ10505EXTTZ/NOPB TO-PMOD NDW 7 250 367.0 367.0 45.0 LMZ10505EXTTZX/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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