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NS LMZ23610 SIMPLE SWITCHER 10A Power Solution

NS company’s LMZ23610 is SIMPLE SWITCHER” title=”SIMPLE SWITCHER”>SIMPLE SWITCHER series 10A power module, the maximum input voltage is 36V, with current sharing feature. The total output power is up to 50W, the output current is 10A, the input voltage is 6V-36V, and the output Voltage 0.8V-6V, efficiency up to 90%, mainly used in POL converters, applications with space constraints/high thermal requirements and negative voltage applications. This article introduces the LMZ23610 performance advantages, electrical specifications and main features, simplified application circuit diagram and evaluation board circuit diagram , the current share evaluation board bill of materials and the board connection diagram.

LMZ23610: 10A SIMPLE SWITCHER Power Module with 36V Maximum Input Voltage and Current Sharing

The newest LMZ2-Series power modules are available in output currents up to 10A with additional features for powering high current intermediate rails, FPGAs, and noise sensitive applications. They also feature a frequency synchronization pin that controls the switching frequency of the internal circuitry, and a current sharing pin for paralleling multiple power modules together for achieving up to 60A of output current.

The LMZ23610 SIMPLE SWITCHER© power module is an easy-to-use step-down DC-DC solution capable of driving up to 10A load. The LMZ23610 is available in an innovative package that enhances thermal performance and allows for hand or machine soldering.

The LMZ23610 can accept an input voltage rail between 6V and 36V and deliver an adjustable and highly accurate output voltage as low as 0.8V. The LMZ23610 only requires two external resistors and three external capacitors to complete the power solution. The LMZ23610 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. The sync input allows synchronization over the 350 to 600 kHz switching frequency range.

LMZ23610 performance advantages:

■ High efficiency reduces system heat generation

■ Low radiated emissions (EMI) complies with EN55022 class B standard

■ Only 7 external components

■ Low output voltage ripple

■ No external heat sink required

■ Simple current sharing for higher current applications

LMZ23610 electrical specifications:

■ 50W maximum total output power

■ Up to 10A output current

■ Input voltage range 6V to 36V

■ Output voltage range 0.8V to 6V

■ Efficiency up to 90%

LMZ23610 main features:

■ Integrated shielded Inductor

■ Simple PCB layout

■ Frequency synchronization input (350 kHz to 600 kHz)

■ Current sharing capability

■ Flexible startup sequencing using external soft-start, tracking and precision enable

■ Protection against inrush currents and faults such as input UVLO and output short circuit

■ –40℃ to 125℃ junction temperature range

■ Single exposed pad and standard pinout for easy mounting and manufacturing

■ Fully enabled for Webench Power Designer

■ Pin compatible with LMZ22008/06, LMZ12010/08/06, LMZ23610/08/06, and LMZ13610/08/06

LMZ23610 application:

■ Point of load conversions from 12V and 24V input rail

■ Time critical projects

■ Space constrained / high thermal requirement applications

■ Negative output voltage applications
NS LMZ23610 SIMPLE SWITCHER 10A Power Solution
Figure 1. LMZ23610 Simplified Application Circuit Diagram

The LMZ23610/8/6 and LMZ22010/8/6 SIMPLE SWITCHER power modules are easy-to-use DC-DC solution capable of driving up to a 10, 8 or 6 ampere load. They are available in an innovative package that enhances thermal performance and allows for hand or machine soldering. The LMZ23610/8/6 can accept an input voltage rail between 6V and 36V and the LMZ22010/8/6 can accept an input voltage rail between 6V and 20V.

The current sharing evaluation board is designed so that four modules can be easily connected to supply up to a 40 amp load. More can be connected as long as care is taken to not exceed the current capabilities of the banana plug connectors and the 5-amp per pin rating of the edge board connector.

The current sharing evaluation board is highly configurable.

The output voltage can be changed to 5V, 3.3V, 2.5V or 1.2V with a jumper change. The external soft-start capacitor facilitates a controlled and adjustable startup rise time of the output. The board temperature can be measured with the onboard resistor . The UVLO can be adjusted by adding one resistor. To simplify the synchronization of the modules an onboard 555 timer provides an adjustable frequency clock from 350 to 600 kHz.

The LMZ23610 and LMZ22010 family is a reliable and robust solution with the following features: loss-less cycle-by-cycle valley current limit to protect for over current or short-circuit fault, thermal shutdown, input under-voltage lockout, and will start up into a pre-biased output.

LMZ23610 Board Specifications:

• VIN = 6V to 36V (LMZ23610/8/6)

• VIN = 6V to 20V (LMZ22010/8/6)

• VOUT = 1.2V, 2.5V, 3.3V or 5V (minimum input voltage of 7V required for 5V output)

• IOUT = 0 to 10, 8, or 6 Amps

• θJA = 8.8°C/W, θJC = 1.0°C/W

• Designed on four layers; Inner are 2 oz copper; Outer are 2 oz copper.

• Measures 3.54″ x 3.54″ (90 mm x 90 mm) and is 62 mils (1.57 mm) thick of FR4 laminate material
NS LMZ23610 SIMPLE SWITCHER 10A Power Solution
Figure 2. LMZ23610 Board Outline Drawing
NS LMZ23610 SIMPLE SWITCHER 10A Power Solution
Figure 3. Simplified circuit diagram of LMZ23610
NS LMZ23610 SIMPLE SWITCHER 10A Power Solution
Figure 4. LMZ23610 Evaluation Board Circuit Diagram
NS LMZ23610 SIMPLE SWITCHER 10A Power Solution
Figure 5. LMZ23610 Evaluation Board Connection Diagram

LMZ23610 Current Share Evaluation Board Bill of Materials: VIN = 6V-36V (20V), VOUT = 1.2/3.3V/5V, IOUT (MAX) =10/08/06A

Current Sharing Evaluation Board Bill of Materials, VIN = 6V to 36V (20V), VOUT = 1.2/3.3V/5V, IOUT (MAX) =10/08/06A
NS LMZ23610 SIMPLE SWITCHER 10A Power Solution

For details, see:
http://www.national.com/ds/LM/LMZ23610.pdf
and
http://www.national.com/an/AN/AN-2093.pdf

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