1 Features

1• Integrated Shielded Inductor

• Flexible Start-up Sequencing Using External Soft-

Start, Tracking, and Precision Enable

• Protection Against In-Rush Currents and Faults

such as Input UVLO and Output Short-Circuit

• Single Exposed Pad and Standard Pinout for Easy

Mounting and Manufacturing

• Pin-to-Pin Compatible With

– LMZ10503 (3-A/15-W Maximum)

– LMZ10504 (4-A/20-W Maximum)

• Fully Enable for WEBENCH® and Power Designer

• Electrical Specifications

– 25-W Maximum Total Output Power

– Up to 5-A Output Current

– Input Voltage Range 2.95 V to 5.5 V

– Output Voltage Range 0.8 V to 5 V

– ±1.63% Feedback Voltage Accuracy Over

Temperature

– Efficiency up to 96%

• Performance Benefits

– Operates at High Ambient Temperatures

– High Efficiency up to 96% Reduces System

Heat Generation

– Low Radiated Emissions (EMI) Tested to

EN55022 Class B Standard (EN 55022:2006,

+A1:2007, FCC Part 15 Subpart B: 2007. See

Table 9 and Layout for Information on Device

Under Test.)

– Passes 10-V/m Radiated Immunity EMI Tested

to Standard EN61000 4-3

– Fast Transient Response for Powering FPGAs

and ASICs

• Create a Custom Design Using the LMZ10505

With the WEBENCH® Power Designer

2 Applications

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

Rails

• Space-Constrained Applications

• Noise-Sensitive Applications (Such as

Transceiver, Medical)

3 Description

The LMZ10505 power module is a complete, easy-touse,

DC-DC solution capable of driving up to a 5-A

load with exceptional power conversion efficiency,

output voltage accuracy, line and load regulation. The

LMZ10505 is available in an innovative package that

enhances thermal performance and allows for hand

or machine soldering.

The LMZ10505 can accept an input voltage rail

between 2.95 V and 5.5 V and can deliver an

adjustable and highly accurate output voltage as low

as 0.8 V. 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 or electrolytic

output capacitors. Externally programmable soft-start

capacitor facilitates controlled start-up. The

LMZ10505 is a reliable and robust solution with the

following features: lossless cycle-by-cycle peak

current limit to protect for overcurrent or short-circuit

fault, thermal shutdown, input undervoltage lockout,

and prebiased start-up.