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.