MAX15066EWE+T Maxim Integrated Products, MAX15066EWE+T Datasheet

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MAX15066EWE+T

Manufacturer Part Number
MAX15066EWE+T
Description
DC/DC Switching Controllers 4A 12V 500kHz w/Integrated Switch
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX15066EWET.pdf (20 pages)

Specifications of MAX15066EWE+T

Lead Free Status / Rohs Status
Lead free / RoHS Compliant
19-5224; Rev 3; 9/10
The MAX15066 current-mode, synchronous, DC-DC
buck converter delivers an output current up to 4A with
high efficiency. The MAX15066 operates from an input
voltage of 4.5V to 16V and provides an adjustable out-
put voltage from 0.606V to 90% of the input voltage. The
MAX15066 is ideal for distributed power systems, note-
book computers, nonportable consumer applications,
and preregulation applications.
The MAX15066 features a PWM mode operation with
internally fixed 500kHz switching frequency capable of
90% maximum duty cycle. The MAX15066 automati-
cally enters skip mode at light loads. The current-mode
control architecture simplifies compensation design and
ensures a cycle-by-cycle current limit and fast response
to line and load transients. A high gain transconductance
error amplifier allows flexibility in setting the external
compensation, simplifying the design and allowing for an
all-ceramic design.
The MAX15066 synchronous buck regulator features
internal MOSFETs that provide better efficiency than
asynchronous solutions, while simplifying the design
relative to discrete controller solutions. In addition to
simplifying the design, the integrated MOSFETs mini-
mize EMI, reduce board space, and provide higher reli-
ability by minimizing the number of external components.
Additional features include an externally adjustable soft-
start, independent enable input and power-good output
for power sequencing, and thermal shutdown protection.
The MAX15066 offers overcurrent protection (high-side
sourcing) with hiccup mode during an output short-
circuit condition. The device ensures safe startup when
powering into a prebiased output.
The MAX15066 is available in a 2mm x 2mm, 16-bump
(4 x 4 array), 0.5mm pitch WLP package and is fully
specified from -40NC to +85NC.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Distributed Power Systems
Preregulators for Linear Regulators
Home Entertainment (TV and Set-Top Boxes)
Network and Datacom
Servers, Workstations, and Storage
_______________________________________________________________ Maxim Integrated Products 1
Regulator with Internal Power Switches
High-Efficiency, 4A, Step-Down DC-DC
General Description
Applications
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
+Denotes a lead(Pb)-free/RoHS-compliant package.
MAX15066EWE+
4.5V TO 16V
Integrated 40mΩ (High-Side) and 18.5mΩ
(Low-Side) R
High Efficiency
Up to 96% (5V Input and 3.3V Output)
Up to 93% (12V Input and 3.3V Output)
Continuous 4A Output Current
±1% Output Accuracy Over Load, Line, and
Temperature
4.5V to 16V Input Voltage Range
Adjustable Output Voltage Range from 0.606V to
(0.9 x V
Fixed 500kHz Switching Frequency
Programmable Soft-Start
Stable with Low-ESR Ceramic Output Capacitors
Safe Startup Into Prebiased Output
Enable Input and Power-Good Output
Cycle-by-Cycle Overcurrent Protection
Fully Protected Against Overcurrent (Hiccup
Protection) and Overtemperature
Automatic Skip Mode During Light Loads
V
2mm x 2mm, 16-Bump (4 x 4 Array), 0.5mm Pitch
WLP Package
INPUT
DD
PART
LDO Undervoltage Lockout
IN
)
SS
IN
EN
V
PGOOD
Typical Application Circuit
DD
DS-ON
MAX15066
GND
-40°C to +85°C
TEMP RANGE
Ordering Information
Power MOSFETs
COMP
BST
LX
FB
PIN-PACKAGE
Features
16 WLP
OUTPUT
1.8V/4A

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MAX15066EWE+T Summary of contents

Page 1

... Preregulators for Linear Regulators Home Entertainment (TV and Set-Top Boxes) Network and Datacom Servers, Workstations, and Storage _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Integrated 40mΩ (High-Side) and 18.5mΩ ...

Page 2

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches ABSOLUTE MAXIMUM RATINGS IN to GND ..............................................................-0.3V to +18V EN to GND ..................................................-0. GND ............. -0.3V to the lower of +18V and ( GND (for ...

Page 3

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches ELECTRICAL CHARACTERISTICS (continued 12V 1FF 22FF VDD IN (Note 4) PARAMETER SYMBOL ERROR AMPLIFIER Error-Amplifier Transconductance Error-Amplifier Voltage Gain FB Set-Point Accuracy FB ...

Page 4

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches ELECTRICAL CHARACTERISTICS (continued 12V 1FF 22FF VDD IN (Note 4) PARAMETER SYMBOL BST Leakage Current BST On-Resistance HICCUP PROTECTION Blanking Time THERMAL SHUTDOWN ...

Page 5

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches (V = 12V 1.8V 1FF OUT VDD LOAD-TRANSIENT RESPONSE 100µs/div LOAD REGULATION 0.6 0.5 0.4 0.3 0.2 0 0.5 1.0 1.5 2.0 2.5 ...

Page 6

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches (V = 12V 1.8V 1FF OUT VDD SHUTDOWN WAVEFORM 1ms/div SWITCHING BEHAVIOR 1 µ s/div SKIP MODE WAVEFORM 40 µ s/div 6 ______________________________________________________________________________________ Typical Operating ...

Page 7

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches (V = 12V 1.8V 1FF OUT VDD STARTUP INTO PREBIAS (NO LOAD 400 µ s/div MAXIMUM LOAD CURRENT vs. TEMPERATURE (V ...

Page 8

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches TOP VIEW (BUMPS ON BOTTOM) BUMP NAME A1, A2 GND Ground. Connect A1 and A2 together as close as possible to the device. Power-Supply Input. Input supply range is from 4.5V ...

Page 9

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches EN ENABLE CONTROL AND 5V LDO THERMAL SHUTDOWN BIAS GENERATOR VOLTAGE REFERENCE MAX15066 1.6V CLAMP 5µA 0.606 SS FB ERROR AMPLIFIER COMP 0.560V RISING, 0.545V FALLING _______________________________________________________________________________________ UVLO COMPARATOR 3.9V/3.75V V ...

Page 10

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches INPUT 4.5V TO 16V 22µF 1µF 10kI 10nF Figure 1. Reference Circuit Detailed Description The MAX15066 is a high-efficiency, peak current-mode, step-down DC-DC converter with integrated high-side (40mI) and low-side (18.5mI) ...

Page 11

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches The device enters discontinuous mode when load cur- rent (I ) and inductor ripple current (DI LOAD that: ∆  V − OUT − = − ...

Page 12

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches Thermal-Shutdown Protection The MAX15066 contains an internal thermal sensor that limits the total power dissipation in the device and pro- tects it in the event of an extended thermal fault condi- ...

Page 13

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches capacitor’s ESL. Estimate the output-voltage ripple due to the output capacitance, ESR, and ESL as follows RIPPLE RIPPLE(C) RIPPLE(ESR) where the output ripple due to output ...

Page 14

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches SKIP-LIMIT OFF1 OFF2 CK V OUT Figure 2. Skip Mode Waveform t is the time needed for inductor current to ...

Page 15

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches FEEDBACK ERROR AMPLIFIER DIVIDER V OUT OUT AVEA(dB)/ OUT g MV REF *C IS OPTIONAL, DESIGNED TO EXTEND ...

Page 16

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches This can be expressed as: 1 ≈ PMOD 2 π × C × OUT LOAD Note: Depending on the application’s specifics, the amplitude of the slope compensation ...

Page 17

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches 1ST ASYMPTOTE R2 x ( 2ND ASYMPTOTE R2 x (R1 + R2) GAIN UNITY 1ST ZERO 1ST POLE - ...

Page 18

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches Closing the Loop: Designing the Compensation Circuitry 1) Select the desired crossover frequency. Choose f between 1 Select R by setting the system transfer’s ...

Page 19

High-Efficiency, 4A, Step-Down DC-DC Regulator with Internal Power Switches Layout Procedure Careful PCB layout is critical to achieve clean and stable operation highly recommended to duplicate the MAX15066 Evaluation Kit layout for optimum perfor- mance. If deviation is ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 20 2010 Maxim Integrated Products © ...

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