MAX5080EVKIT Maxim Integrated Products, MAX5080EVKIT Datasheet

no-image

MAX5080EVKIT

Manufacturer Part Number
MAX5080EVKIT
Description
EVAL KIT FOR MAX5080
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX5080EVKIT

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
3.3V
Current - Output
1A
Voltage - Input
4.5 ~ 40V
Regulator Topology
Buck
Frequency - Switching
250kHz
Board Type
Fully Populated
Utilized Ic / Part
MAX5080
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX5080/MAX5081 are 250kHz PWM step-down
DC-DC converters with an on-chip, 0.3Ω high-side
switch. The input voltage range is 4.5V to 40V for the
MAX5080 and 7.5V to 40V for the MAX5081. The output
is adjustable from 1.23V to 32V and can deliver up to
1A of load current.
Both devices utilize a voltage-mode control scheme for
good noise immunity in the high-voltage switching envi-
ronment and offer external compensation allowing for
maximum flexibility with a wide selection of inductor val-
ues and capacitor types. The switching frequency is
internally fixed at 250kHz and can be synchronized to
an external clock signal through the SYNC input. Light
load efficiency is improved by automatically switching
to a pulse-skip mode.
All devices include programmable undervoltage lock-
out and soft-start. Protection features include cycle-by-
cycle current limit, hiccup-mode output short-circuit
protection, and thermal shutdown. Both devices are
available in a space-saving, high-power (2.7W), 16-pin
TQFN package and are rated for operation over the
-40°C to +125°C temperature range.
19-3656; Rev 1; 2/07
FireWire is a registered trademark of Apple Computer, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Typical Operating Circuits continued at end of data sheet.
FireWire
Distributed Power
®
Power Supplies
________________________________________________________________ Maxim Integrated Products
4.5V TO 40V
PGND
General Description
V
IN
C1
R1
R2
C2
Applications
Automotive
Industrial
1A, 40V, MAXPower Step-Down
ON/OFF
REG
SYNC SGND PGND
IN
DVREG
MAX5080
C-
♦ 4.5V to 40V (MAX5080) or 7.5V to 40V (MAX5081)
♦ 1A Output Current
♦ V
♦ Internal High-Side Switch
♦ Fixed 250kHz Internal Oscillator
♦ Automatic Switchover to Pulse-Skip Mode at
♦ External Frequency Synchronization
♦ Thermal Shutdown and Short-Circuit Protection
♦ Operates Over the -40°C to +125°C Temperature
♦ Space-Saving (5mm x 5mm) High-Power 16-Pin
*EP = Exposed pad.
Pin Configurations appear at end of data sheet.
MAX5080ATE
MAX5081ATE
C
Input Voltage Range
Light Loads
Range
TQFN Package
F
OUT
C+
SS
PART
C
D1
SS
Range From 1.23V to 32V
BST
COMP
DC-DC Converters
LX
FB
Typical Operating Circuits
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
D2
C
Ordering Information
BST
L1
C8
R5
PIN-
PACKAGE
16 TQFN-EP*
16 TQFN-EP*
C5
C7
R6
C6
Features
R3
R4
T1655-2
T1655-2
V
PGND
CODE
OUT
PKG
1

Related parts for MAX5080EVKIT

MAX5080EVKIT Summary of contents

Page 1

... PGND Typical Operating Circuits continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1A, 40V, MAXPower Step-Down ♦ 4.5V to 40V (MAX5080) or 7.5V to 40V (MAX5081) Input Voltage Range ♦ ...

Page 2

MAXPower Step-Down DC-DC Converters ABSOLUTE MAXIMUM RATINGS IN, ON/OFF to SGND..............................................-0.3V to +45V LX to SGND .................................................-0. BST to SGND ................................................-0. BST to LX................................................................-0.3V to +12V PGND to SGND .....................................................-0.3V to +0.3V REG, DVREG, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 12V ON/OFF REG DVREG are 25°C.) (Note 1) A PARAMETER SYMBOL FB Offset Voltage OSCILLATOR Frequency Maximum Duty Cycle SYNC High-Level Voltage SYNC Low-Level Voltage ...

Page 4

MAXPower Step-Down DC-DC Converters ELECTRICAL CHARACTERISTICS (continued 12V ON/OFF REG DVREG are 25°C.) (Note 1) A PARAMETER SYMBOL THERMAL SHUTDOWN Thermal Shutdown Temperature Thermal ...

Page 5

Figure 5 (MAX5080) and Figure 6 (MAX5081 OPERATING FREQUENCY vs. TEMPERATURE 260 258 256 254 V = 4.5V IN 252 250 248 246 V = 40V IN 244 242 240 -40 - ...

Page 6

MAXPower Step-Down DC-DC Converters (V = 12V, see Figure 5 (MAX5080) and Figure 6 (MAX5081 OUTPUT VOLTAGE vs. TEMPERATURE 3.40 MAX5080 3.38 3.36 3. LOAD 3.32 3.30 3.28 3.26 3.24 3.22 3.20 -40 ...

Page 7

Figure 5 (MAX5080) and Figure 6 (MAX5081 LOAD-TRANSIENT RESPONSE V = 4.5V 0.25A OUT MAX5080 0 200µs/div LX VOLTAGE AND INDUCTOR CURRENT 0 2µs/div _______________________________________________________________________________________ 1A, 40V, MAXPower Step-Down ...

Page 8

MAXPower Step-Down DC-DC Converters PIN NAME MAX5080 MAX5081 1 1 COMP Error Amplifier Output. Connect COMP to the compensation feedback network. Feedback Regulation Point. Connect to the center tap of a resistive divider from converter ...

Page 9

IN LDO REG 1.23V EN REF V I REF SS 1.23V SS E/A FB COMP IN EN SYNC RAMP OSC 0.3V Figure 1. MAX5080 Simplified Block Diagram Internal Linear Regulator (REG) REG is the output terminal (MAX5080), ...

Page 10

MAXPower Step-Down DC-DC Converters IN LDO REG 1.23V EN REF V I REF SS 1.23V SS E/A FB COMP IN EN SYNC RAMP OSC 0.3V Figure 2. MAX5081 Simplified Block Diagram Soft-Start and Reference (SS the ...

Page 11

For applications that do not require a 4.5V minimum input, use the MAX5081. In this device the charge pump is omitted and the input voltage range is from 7.5V to 40V. In this situation the boost diode and the boost ...

Page 12

MAXPower Step-Down DC-DC Converters ⎡ ⎤ V OUT − ⎢ 1 ⎥ V ⎣ ⎦ FB where V = 1.23V. FB Inductor Selection Three key inductor parameters must be specified for operation with ...

Page 13

Input Capacitors Selection section) and f is the converter’s switching frequency. SW The allowable deviation of the output voltage during fast load transients also determines the output capaci- ...

Page 14

MAXPower Step-Down DC-DC Converters OUT EA R4 REF GAIN CLOSED-LOOP (dB) GAIN Figure 3. Error Amplifier Compensation Circuit (Closed-Loop and Error-Amplifier Gain Plot) ...

Page 15

OUT EA R4 REF GAIN CLOSED-LOOP (dB) GAIN Figure 4. Error Amplifier Compensation Circuit (Closed-Loop and Error Amplifier Gain Plot) for Higher ESR Output Capacitors Since R3 >> ...

Page 16

MAXPower Step-Down DC-DC Converters V IN 4.5V TO 40V R1 1.4MΩ REG C1 10µF ON/OFF R2 549kΩ C2 0.1µF PGND Figure 5. MAX5080 Typical Application Circuit V IN 7.5V TO 40V R1 1.4MΩ REG C1 10µF ON/OFF R2 ...

Page 17

V IN 7.5V TO 40V IN R1 REG C1 ON/OFF SYNC SGND PGND R2 C2 PGND TOP VIEW MAX5080 REG 15 SGND TQFN ______________________________________________________________________________________ 1A, 40V, MAXPower Step-Down DC-DC ...

Page 18

MAXPower Step-Down DC-DC Converters (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 18 ______________________________________________________________________________________ Package Information ...

Page 19

... 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 ____________________ 19 © 2007 Maxim Integrated Products ...

Related keywords