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 2015-2017 Microchip Technology Inc. DS20005478B-page 1

MIC45404

Features

• Input Voltage Range: 4.5V to 19V

• Output Current: Up to 5A

• 82% Peak Efficiency at 12 VIN, 0.9 VOUT

• Pin-Selectable Output Voltages: 0.7V, 0.8V, 0.9V,

1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V

• ±1% Output Voltage Accuracy

• Supports Safe Pre-Biased Start-Up

• Pin-Selectable Current Limit

• Pin-Selectable Switching Frequency

• Internal Soft Start

• Thermal Shutdown

• Hiccup Mode Short-Circuit Protection

• Available in a 54-Lead 6 mm x 10 mm QFN

Package

• Ultra-Low Profile: 2.0 mm Height

• -40°C to +125°C Junction Temperature Range

Applications

• Servers, Data Storage, Routers and Base Stations

• FPGAs, SSD, DSP and Low-Voltage ASIC Power

General Description

The MIC45404 device is an ultra-low profile, synchro-

nous step-down regulator module, featuring a unique

2.0 mm height. The module incorporates a DC-to-DC

regulator, bootstrap capacitor, high-frequency input

capacitor and an inductor in a single package. The

module pinout is optimized to simplify the Printed

Circuit Board (PCB) layout process.

This highly-integrated solution expedites system

design and improves product time to market. The inter-

nal MOSFETs and inductor are optimized to achieve

high efficiency at low output voltage. Due to the fully

optimized design, MIC45404 can deliver up to 5A

current with a wide input voltage range of 4.5V to 19V.

The MIC45404 is available in a 54-lead 6 mm x

10 mm x 2.0 mm QFN package with a junction operat-

ing temperature range from -40C to +125C, which

makes an excellent solution for systems in which PCB

real-estate and height are important limiting factors,

and air flow is restricted.

Typical Application

VIN

OUT

VIN

4.5V to 19V

FREQ

VDDA

VOSET1

GND

VOSET0

COMP

EN/DLY

OUTSNS

MIC45404

DDA

Power-Good

Enable

VDDA

Output

Voltage

Selection

VDDA

Frequency

Selection

ILIM

VDDA

Current Limit

Selection

VOUT

MIC45404 12V 5A DC-to-DC Converter

19V 5A Ultra-Low Profile DC-to-DC Power Module

MIC45404

DS20005478B-page 2  2015-2017 Microchip Technology Inc.

Package Types

Functional Diagram

MIC45404

6 mm x 10 mm QFN*

(Top View)

KEEPOUT

GND

BST

VDDA

OUT

GND

KEEPOUT

AGND

VOSET1

OUTSNS

EN/DLY

VOSET0

VDDP

OUT

OUT13

OUT14

OUT15

OUT16

OUT17

OUT18

OUT19

GND

VIN

KEEPOUT

BST 42

ILIM

FREQ

GND

COMP

OUTSNS

KEEPOUT10

OUT11

6 GND_EXT

5 GND_EXT

MIC45404YMP

GND_EP

* Includes Exposed Thermal Pad (EP); see Table 3-1.

BST

ILIM

FREQ

VDDA

VOSET1

AGND

VOSET0

COMP

EN/DLY

OUTSNS

VIN

PGND

VDDP

PWM

Regulator

100 nF

47 pF

BST

VOSET1

AGND

VOSET0

GND_EP

OUTSNS

GND

COMP

OUT

ILIM

FREQ

VDDA

EN/DLY

VIN

VDDP

GND_EXT

VDDP

LDO

VIN

 2015-2017 Microchip Technology Inc. DS20005478B-page 3

MIC45404

1.0 ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings†

VIN to AGND ................................................................................................................................................ -0.3V to +20V

VDDP

, VDDA to AGND ..................................................................................................................................... -0.3V to +6V

VDDP to VDDA ............................................................................................................................................ -0.3V to +0.3V

VOSETX, FREQ, ILIM, to AGND .................................................................................................................... -0.3V to +6V

BST to LX..................................................................................................................................................... -0.3V to +6V

BST to AGND .............................................................................................................................................. -0.3V to +26V

EN/DLY to AGND...................................................................................................................... -0.3V to V

DDA + 0.3V, +6V

PG to AGND .................................................................................................................................................. -0.3V to +6V

COMP, OUTSNS to A

GND ....................................................................................................... -0.3V to V

DDA + 0.3V, +6V

AGND to GND ............................................................................................................................................ -0.3V to +0.3V

Junction Temperature .......................................................................................................................................... +150°C

Storage Temperature (TS)...................................................................................................................... -65°C to +150°C

Lead Temperature (soldering, 10s) ........................................................................................................................ 260°C

ESD Rating

( )1

HBM ........................................................................................................................................................................... 2kV

MM ........................................................................................................................................................................... 150V

CDM....................................................................................................................................................................... 1500V

Note 1: Devices are ESD-sensitive. Handling precautions are recommended. Human body model, 1.5 k in series

with 100 pF.

Operating Ratings( )1

Supply Voltage (VIN) ..................................................................................................................................... 4.5V to 19V

Externally Applied Analog and Drivers Supply Voltage (V

IN = VDDA = VDDP).............................................. 4.5V to 5.5V

Enable Voltage (EN/DLY)............................................................................................................................... 0V to V

DDA

Power Good (PG) Pull-up Voltage (VPU_PG) ................................................................................................ 0V to 5.5V

Output Current ............................................................................................................................................................. 5A

Junction Temperature (TJ) ..................................................................................................................... -40°C to +125°C

Note 1: The device is not ensured to function outside the operating range.