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EN5339QI

3A Low Profile Synchronous Buck DC-DC Converter with Integrated Inductor

Enpirion, Inc. 

EN5339QI

3A Low Profile Synchronous Buck DC-DC

Converter with Integrated Inductor

RoHS Compliant

Halogen Free

Description

The EN5339QI is a highly integrated, low profile,

highly efficient, 3A synchronous buck power system

on a chip (PowerSoC). The device features an

advance integrated inductor, integrated MOSFETs, a

PWM voltage-mode controller, and internal

compensation providing the smallest possible solution

size.

The EN5339QI PowerSoC is designed specifically to

meet the driving demand for higher power density by

providing a fully integrated buck converter into a tiny

4x6x1.1mm 24-pin QFN package. It features high

efficiency, excellent line and load regulation and

guarantees the full 3A output current over

temperature.

The EN5339QI operates at high switching frequency

and allows for the use of tiny MLCC capacitors. It also

enables a very wide control loop bandwidth providing

excellent transient performance and reduced output

impedance. The internal compensation is designed

for unconditional stability across all operating

conditions.

The Enpirion integrated inductor solution significantly

helps to reduce noise. The complete power converter

solution enhances productivity by offering greatly

simplified board design, layout and manufacturing

requirements. All Enpirion products are RoHS

compliant and lead-free manufacturing environment

compatible.

Features

• Integrated Inductor

• Solution Footprint as Small as 55 mm2

• Low Profile, 1.1mm

• High Reliability Solution: 35,700 Years MTBF

• High Efficiency, up to 95 %

• Low Output Ripple Voltage; <5mVP-P Typical

• ±3% Output Variation Over Line, Load, Temp

• 2.4 V to 5.5 V Input Voltage Range

• 3A Continuous Output Current Capability

• Output Enable and Power OK Signal

• Under Voltage Lockout, Over Current, Short Circuit,

and Thermal Protection

• RoHS Compliant; Halogen Free; 260°C Reflow

Applications

• Applications with Low Profile Requirement such as

SSD and Embedded Computing

• SAN/NAS Accelerator Appliance

• Controllers, Raid, Processors, Network Processors,

DSPs’ FPGAs, and ASICs

• Noise Sensitive Applications

Figure 1. Simplified Applications Circuit

100

90

80

70

60

50

40

30

20

10

0

0

Efficiency vs. Output Current

CONDITIONS

VIN = 3.3V

VOUT = 2.5V

VOUT = 1.2V

Actual Solution Size

55mm2

0.5

1

1.5

2

2.5

3

OUTPUT CURRENT (A)

Figure 2. Highest Efficiency in Smallest Solution Size

06903

September 12, 2012

www.enpirion.com

Rev: B

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