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WPMDH1102401 / 171012401

MagI³C Power Module

VDRM - Variable Step Down Regulator Module

6-42V / 1A / 5-24V Output

DESCRIPTION

The VDRM series of the MagI³C Power Module family

provide a fully integrated DC-DC power supply

including the buck switching regulator and inductor in

a package.

The WPMDH1102401 offers high efficiency and

delivers up to 1A of output current. It operates from

6V input voltage up to 42V. It is designed for fast

transient response.

It is available in an innovative industrial high power

density TO263-7EP (10.16 x 13.77 x 4.57mm)

package that enhances thermal performance and

allows for hand or machine soldering.

The VDRM regulators have an on-board protection

circuitry to guard against thermal overstress and

electrical damage featuring thermal shut-down, over-

current, short-circuit, overvoltage and under-voltage

protections.

TYPICAL APPLICATIONS

 Point-of-Load DC-DC applications from 12V and

24V industrial rails

 Industrial, Test & Measurement, Medical

applications

 System power supplies

 DSPs, FPGAs, MCUs and MPUs supply

 I/O interface power supply

FEATURES

 Peak efficiency up to 97%

 Current capability up to 1A

 Wide input voltage range: 6V to 42V

 Output voltage range: 5V to 24V

 Maximum output power: 36W

 Integrated shielded inductor solution for quick

time to market and ease of use

 Single exposed pad for best-in-class thermal

performance

 Low output voltage ripple

 Under voltage lockout Protection (UVLO)

 Programmable soft-start

 Adjustable switching frequency

 Thermal shut down, inrush current and output

short circuit protection

 Operating ambient temp. range up to 105°C

 Operating junction temp. range: -40 to 125°C

 RoHS & REACH compliant

 Mold compound UL 94 Class V0 (flammability

testing) certified

 Complies with EN 55022 class B radiated and

conducted emissions standard

TYPICAL CIRCUIT DIAGRAM

RON

VIN

EN PGND SS

VOUT

Module

FBT

FBB

OUT

AGND

OUT

263

Summary of content (31 pages)

PAGE 1
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module 6-42V / 1A / 5-24V Output DESCRIPTION FEATURES The VDRM series of the MagI³C Power Module family provide a fully integrated DC-DC power supply including the buck switching regulator and inductor in a package.       The WPMDH1102401 offers high efficiency and delivers up to 1A of output current. It operates from 6V input voltage up to 42V. It is designed for fast transient response.
PAGE 2
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module PACKAGE 1 VIN 2 Top View TO263-7EP RON AGND 4 6 3 7 EN SS 5 FB 6 VOUT 7 Exposed Pad = PGND Connect to AGND EP PIN DESCRIPTION PIN # SYMBOL TYPE PIN DESCRIPTION 1 VIN Power The supply input pin is a terminal for an unregulated input voltage source. It is required to place the input capacitor nearby the VIN pin and PGND.
PAGE 3
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module ABSOLUTE MAXIMUM RATINGS Caution: Exceeding the listed absolute maximum ratings may affect the device negatively and may cause permanent damage. SYMBOL VIN, RON EN, FB, SS VESD-HBM TJ TST TSOLR PARAMETER Input Voltage, On-time resistor Enable, Feedback, Soft-start Input ESD, human body model Junction temperature Storage temperature LIMITS -0.3 to 43.5 -0.3 to 7.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module ELECTRICAL SPECIFICATIONS MIN and MAX limits are valid for the recommended junction temperature range of -40°C to 125°C. Typical values represent statistically the utmost probability at following conditions: VIN=24V, VOUT=12V, RON=249KΩ TA=25°C, unless otherwise specified.
PAGE 5
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 24V; CIN = 10µF X7R ceramic; CO = 47µF X7R ceramic, TAMB = 25°C Thermal Derating: VIN = 42V, VOUT = 24V @ θJA = 16°C/W 1.2 1.2 1.0 1.0 Output Current [A] Output Current [A] Thermal Derating: VIN = 24V, VOUT = 12V @ θJA = 16°C/W 0.8 0.6 0.4 0.2 0.8 0.6 0.4 0.2 0.0 0.
PAGE 6
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 24V; CIN = 10µF X7R ceramic; CO = 47µF X7R ceramic, TAMB = 25°C Efficiency: VOUT = 5V @ TAMB = 25°C Power Loss: VOUT = 5V @ TAMB = 25°C 100 1.5 1.2 Power Loss [W] Efficiency [%] 95 90 85 80 VIN = 8V VIN = 12V VIN = 24V 75 0.9 0.6 0.3 70 0.0 0.0 0.2 0.4 0.6 0.8 1.0 0.
PAGE 7
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 24V; CIN = 10µF X7R ceramic; CO = 47µF X7R ceramic, TAMB = 25°C Efficiency: VOUT = 5V @ TAMB = 85°C Power Loss: VOUT = 5V @ TAMB = 85°C 100 1.5 1.2 Power Loss [W] Efficiency [%] 95 90 85 80 VIN = 8V VIN = 12V VIN = 24V 75 VIN = 8V VIN = 12V VIN = 24V 0.9 0.6 0.3 70 0.0 0.2 0.4 0.6 0.8 0.0 1.0 0.
PAGE 8
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 24V; CIN = 10µF X7R ceramic; CO = 47µF X7R ceramic, TAMB = 25°C VOUT ENABLE 5V/Div 1 ms/Div Output Voltage Regulation [%] Line and Load Regulation TAMB = 25°C Startup VIN = 24V, IOUT = 1A 0.20 0.15 0.10 0.05 0.00 -0.05 VIN = 15V VIN = 24V VIN = 36V -0.10 -0.15 -0.20 0.0 0.2 0.4 0.6 0.8 1.
PAGE 9
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 24V; CIN = 10µF X7R ceramic; CO = 47µF X7R ceramic, TAMB = 25°C Current Limit vs. Input Voltage VOUT = 12V @ TAMB = 25°C Current Limit vs. Input Voltage VOUT = 24V @ TAMB = 25°C 3.5 DC Current Limit Level [A] DC Current Limit Level [A] 3.5 3.0 2.5 2.0 FSW = 250kHz FSW = 400kHz FSW = 600kHz 1.5 1.0 3.0 2.5 2.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module BLOCK DIAGRAM Linear Regulator Power Module CVCC 1 VIN CBOOST 15µH VIN VOUT 7 VOUT HSS 0.47µF CIN RFBT RON VIN UVLO 2 RON 5 SS Controller/ Power Control/ Protection Circuitry CFF COUT LSS 6 FB RFBB CSS AGND EN AGND PGND 3 4 EP AGND CIRCUIT DESCRIPTION The MagI³C Power Module WPMDH1102401 is based on a synchronous step down regulator with integrated MOSFET and a power inductor.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW 7 Steps to design the power application The next 7 simple steps will show how to select the external components to design your power application: 1. 2. 3. 4. 5. 6. 7. Program output voltage Set operating frequency with RON Select input capacitor Select output capacitor Select soft-start capacitor Select feed forward capacitor Optional: Program under voltage lockout divider 1 VIN RON 2. 7 VOUT 3.
PAGE 12
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW The inverse relationship of tON and VIN gives a nearly constant switching frequency as V IN is varied. RON should be selected such that the on-time at maximum VIN is greater than 150ns. The on-timer has a limiter to ensure a minimum of 150ns for tON.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW Step 3. Select Input Capacitor (CIN) The MagI³C power module contains an internal 0.47μF input ceramic capacitor. Additional input capacitance is required external to the MagI³C power module to handle the input ripple current of the application. This input capacitance should be located as close as possible to the MagI³C power module.
PAGE 14
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW Step 4. Select Output Capacitor (COUT) None of the required output capacitance is integrated within the module. At a minimum, the output capacitor must meet the worst case RMS current rating of 0.5 ∗ 𝐼𝐿𝑅 𝑃−𝑃 , as calculated in equation (8). Beyond that, additional capacitance will reduce output ripple so long as the ESR is low enough to permit it. A minimum value of 10µF is generally required.
PAGE 15
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW Step 5. Select Soft-Start Capacitor (CSS) Programmable soft-start permits the regulator to slowly ramp to its steady state operating point after being enabled, thereby reducing current inrush from the input supply and slowing the output voltage rise-time to prevent overshoot.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW 𝑉𝑈𝑉𝐿𝑂 (𝐸𝑋𝑇𝐸𝑅𝑁) 𝑅𝐸𝑁𝑇 = –1 𝑅𝐸𝑁𝐵 1.18𝑉 (16) VUVLO (EXTERN) = User programmable voltage threshold to turn the module ON/OFF. The EN pin is internally pulled up to VIN and can be left floating for always-on operation. However, it is good practice to use the enable divider and turn on the regulator when V IN is close to reaching its nominal value.
PAGE 17
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW Power Loss: VOUT = 12V @ TAMB = 85°C 1.5 VIN = 15V VIN = 24V VIN = 36V Power Loss [W] 1.2 0.9 0.6 0.3 0.0 0.0 0.2 0.4 0.6 0.8 1.0 Output Current [A] From the graph we read a power loss of 0.75W. Entering the values in formula (19) results in: θCA(MAX) < 125°C − 85°C − 1.9°C/W = 51.4°C/W 0.75𝑊 θJA(MAX) = θJC + θCA(MAX) = 1.9°C/W + 15.2°C/W = 53.
PAGE 18
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW PCB Layout Instructions: PC board layout is an important part of DC-DC converter design. Poor board layout can disrupt the performance of a DC-DC converter and surrounding circuitry by contributing to EMI, ground bounce and resistive voltage drop in the traces. These can send erroneous signals to the DC-DC converter resulting in poor regulation or instability.
PAGE 19
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW The placement of the input capacitors is highlighted in the following picture of the evaluation board: 2: Have a single point ground. The ground connections for the feedback, soft-start, and enable components should be routed to the AGND pin of the device. This prevents any switched or load currents from flowing in the analog ground traces.
PAGE 20
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW Provide the single point ground connection from AGND pin 4 to the GND terminal of the output capacitor. This is the point of lowest noise. 3: Minimize trace length to the FB pin. The feedback resistors, RFBT and RFBB, and the feed forward capacitor CFF, should be located close to the FB pin. Since the FB node is high impedance, maintain the copper area as small as possible.
PAGE 21
WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DESIGN FLOW 4: Make input and output bus connections as wide as possible. This reduces any voltage drops on the input or output of the converter and maximizes efficiency. 5: Provide adequate device heat-sinking. Use an array of heat-sinking vias to connect the exposed pad to the ground plane on the bottom PCB layer.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module PROTECTIVE FEATURES Output Over-voltage protection (OVP) The voltage at FB is compared to a 0.8V internal reference. The over-voltage protection (OVP) has a threshold of 0.92V. If FB rises above this limit, the on-time is immediately terminated. It can occur if the input voltage is increased very suddenly or if the output load is decreased very suddenly.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module APPLICATIONS The MagI³C power module for high output voltage is an easy-to-use DC-DC solution capable of driving up to a 2A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. It is available in an innovative package that enhances thermal performance and allows hand or machine soldering. Following application circuits show possible operating configurations.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module Application Circuit 1 VIN VIN RON VOUT 7 RFBT Module 2 RON FB CIN AGND 3 EN VOUT PGND SS EP 5 CFF 6 COUT 4 CSS RFBB Bill of Materials for Design Example 2: Vout 24V 18V 15V 12V 5V RFBT 34kΩ 34kΩ 34kΩ 34kΩ 34kΩ RFBB 1.18kΩ 1.58kΩ 1.91kΩ 2.43kΩ 6.49kΩ RON 499kΩ 374kΩ 287kΩ 249kΩ 100kΩ 33µF 33µF 47µF 47µF 100µF CIN COUT 10µF CSS 4700pF CFF 0.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module HANDLING RECOMMENDATIONS 1. 2. 3. 4. The power module is classified as MSL3 (JEDEC Moisture Sensitivity Level 3) and requires special handling due to moisture sensitivity (JEDEC J-STD033). The parts are delivered in a sealed bag (Moisture Barrier Bags = MBB) and should be processed within one year. When opening the moisture barrier bag check the Humidity Indicator Card (HIC) for color status.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module PHYSICAL DIMENSIONS (mm) Package Type: TO263-7 thermal pad recommended soldering pad we-online.com recommended stencil design solder paste recommendation 150µm Würth Elektronik eiSos GmbH & Co. KG - Data Sheet - REV 1.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module PACKAGING Reel (mm) 20P we-online.com Würth Elektronik eiSos GmbH & Co. KG - Data Sheet - REV 1.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module Tape (mm) TO263-7EP we-online.com Würth Elektronik eiSos GmbH & Co. KG - Data Sheet - REV 1.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module DOCUMENT HISTORY Revision 1.0 we-online.com Date 10.03.2015 Description Page Release of final version Würth Elektronik eiSos GmbH & Co. KG - Data Sheet - REV 1.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module CAUTIONS AND WARNINGS The following conditions apply to all goods within the product series of MagI³C of Würth Elektronik eiSos GmbH & Co. KG: General: All recommendations according to the general technical specifications of the data-sheet have to be complied with. The usage and operation of the product within ambient conditions which probably alloy or harm the component surface has to be avoided.
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WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module IMPORTANT NOTES The following conditions apply to all goods within the product range of Würth Elektronik eiSos GmbH & Co. KG: 1. General Customer Responsibility Some goods within the product range of Würth Elektronik eiSos GmbH & Co. KG contain statements regarding general suitability for certain application areas.