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)

– LMZ10505 (5-A/25-W Maximum)

• Fully Enable for WEBENCH® and Power Designer

• Electrical Specifications

– 20-W Maximum Total Output Power

– Up to 4-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

• 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 LMZ10504

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 LMZ10504 power module is a complete, easy-touse,

DC-DC solution capable of driving up to a 4-A

load with exceptional power conversion efficiency,

output voltage accuracy, and line and load regulation.

The LMZ10504 is available in an innovative package

that enhances thermal performance and allows for

hand or machine soldering.

The LMZ10504 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. 1-MHz 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 LMZ10504 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.