MAX5090EVKIT Maxim Integrated Products, MAX5090EVKIT Datasheet

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MAX5090EVKIT

Manufacturer Part Number
MAX5090EVKIT
Description
EVAL KIT FOR MAX5090
Manufacturer
Maxim Integrated Products
Datasheets
1.MAX5090BATE.pdf (17 pages)
2.MAX5090EVKIT.pdf (4 pages)

Specifications of MAX5090EVKIT

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
5V
Current - Output
2A
Voltage - Input
7.5 ~ 76V
Regulator Topology
Buck
Frequency - Switching
125kHz
Board Type
Fully Populated
Utilized Ic / Part
MAX5090
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX5090A/B/C easy-to-use, high-efficiency, high-
voltage step-down DC-DC converters operate from an
input voltage up to 76V, and consume only 310µA qui-
escent current at no load. This pulse-width-modulated
(PWM) converter operates at a fixed 127kHz switching
frequency at heavy loads, and automatically switches
to pulse-skipping mode to provide low quiescent cur-
rent and high efficiency at light loads. The MAX5090
includes internal frequency compensation simplifying
circuit implementation. The device can also be syn-
chronized with external system clock frequency in a
noise-sensitive application. The MAX5090 uses an
internal low on-resistance and a high-voltage DMOS
transistor to obtain high efficiency and reduce overall
system cost. This device includes undervoltage lock-
out, cycle-by-cycle current limit, hiccup-mode output
short-circuit protection, and overtemperature shutdown.
The MAX5090 delivers up to 2A output current. External
shutdown is included, featuring 19µA (typ) shutdown
current. The MAX5090A/MAX5090B versions have fixed
output voltages of 3.3V and 5V, respectively, while the
MAX5090C features an adjustable 1.265V to 11V output
voltage.
The MAX5090 is available in a space-saving 16-pin thin
QFN package (5mm x 5mm) and operates over the
automotive temperature range (-40°C to +125°C).
19-3872; Rev 0; 3/06
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.
7.5V TO 76V
V IN
Automotive
Industrial
Distributed Power
68µF
C
IN
C
0.47µF
BYPASS
Typical Operating Circuit
MAXPower Step-Down DC-DC Converters
________________________________________________________________ Maxim Integrated Products
ON/OFF
SYNC
V
SGND
IN
10Ω
R
MAX5090B
IN
PGND
General Description
DRAIN
BST
LX
FB
SS
VD
C
0.22µF
3.3µF
Applications
BST
C
0.047µF
D1
PDS5100H
SS
100µH
C
100µF
OUT
V
5V/2A
OUT
2A, 76V, High-Efficiency
♦ Wide Input Voltage Range: 6.5V to 76V
♦ Fixed (3.3V, 5V) and Adjustable (1.265V to 11V)
♦ 2A Output Current
♦ Efficiency Up to 92%
♦ Internal 0.26Ω High-Side DMOS FET
♦ 310µA Quiescent Current at No Load
♦ 19µA Shutdown Current
♦ Internal Frequency Compensation
♦ Fixed 127kHz Switching Frequency
♦ External Frequency Synchronization
♦ Thermal Shutdown and Short-Circuit Current Limit
♦ -40°C to +125°C Automotive Temperature Range
♦ 16-Pin (5mm x 5mm) Thin QFN Package
♦ Capable of Dissipating 2.67W at +70°C
Ordering Information continued at end of data sheet.
*The package code is T1655-3.
**EP = Exposed pad.
+Denotes lead-free package.
MAX5090AATE+ -40°C to +125°C 16 TQFN-EP**
MAX5090AATE
MAX5090BATE+ -40°C to +125°C 16 TQFN-EP**
MAX5090BATE
Output-Voltage Versions
PART
TOP VIEW
DRAIN
DRAIN
N.C.
N.C.
13
14
15
16
-40°C to +125°C 16 TQFN-EP**
-40°C to +125°C 16 TQFN-EP**
RANGE
TEMP
Ordering Information
12
EP
1
11
MA5090
2
TQFN
Pin Configuration
10
3
PIN-
PACKAGE*
9
4
8
7
6
5
Features
FB
SS
SYNC
VD
VOLTAGE
OUTPUT
(V)
3.3
3.3
5.0
5.0
1

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MAX5090EVKIT Summary of contents

Page 1

... FB SS SYNC VD SGND PGND ________________________________________________________________ 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. 2A, 76V, High-Efficiency ♦ Wide Input Voltage Range: 6.5V to 76V ♦ Fixed (3.3V, 5V) and Adjustable (1.265V to 11V) Output-Voltage Versions ♦ ...

Page 2

High-Efficiency MAXPower Step-Down DC-DC Converters ABSOLUTE MAXIMUM RATINGS (Voltages referenced to PGND, unless otherwise specified DRAIN .............................................................-0.3V to +80V IN SGND, PGND.………………………………………-0.3V to +0.3V LX.................................................................-0. BST ...............................................................-0. BST to LX................................................................-0.3V to +10V ...

Page 3

High-Efficiency MAXPower Step-Down ELECTRICAL CHARACTERISTICS (continued +12V +12V ON/OFF SYNC T = +25°C. See the Typical Operating Circuit.) (Note 1) A PARAMETER SYMBOL Soft-Start Reference Voltage V SS(REF) INTERNAL SWITCH/CURRENT LIMIT Peak ...

Page 4

High-Efficiency MAXPower Step-Down DC-DC Converters (V = 12V, V =12V -40°C to +125°C, unless otherwise noted. Typical values are ON/OFF A J Operating Circuit, if applicable.) V vs. TEMPERATURE OUT (MAX5090AATE, ...

Page 5

High-Efficiency MAXPower Step-Down (V = 12V, V =12V -40°C to +125°C, unless otherwise noted. Typical values are ON/OFF A J Operating Circuit, if applicable.) OUTPUT CURRENT LIMIT vs. TEMPERATURE (MAX5090BATE) 4.0 ...

Page 6

High-Efficiency MAXPower Step-Down DC-DC Converters (V = 12V, V =12V -40°C to +125°C, unless otherwise noted. Typical values are ON/OFF A J Operating Circuit, if applicable.) LOAD-TRANSIENT RESPONSE (MAX5090AATE) MAX5090 toc19 ...

Page 7

High-Efficiency MAXPower Step-Down PIN NAME Source Connection of Internal High-Side Switch 3 BST Boost Capacitor Connection. Connect a 0.22µF ceramic capacitor from BST to LX Input Voltage. Bypass Internal ...

Page 8

High-Efficiency MAXPower Step-Down DC-DC Converters ON/OFF ENABLE REGULATOR (FOR ANALOG) 1.38V REGULATOR VD VREF (FOR DRIVER) SYNC SRAMP SS MIN TYPE 3 x1 COMPENSATION *R L MAX5090 = ∞ FOR MAX5090C *R = 0Ω AND ...

Page 9

High-Efficiency MAXPower Step-Down Boost High-Side Gate Drive (BST) Connect a flying bootstrap capacitor between LX and BST to provide the gate-drive voltage to the high-side n-channel DMOS switch. The capacitor is alternately charged from the internally regulated output-voltage ...

Page 10

High-Efficiency MAXPower Step-Down DC-DC Converters V IN 6.5V TO 76V 68µF BYPASS 0.47µ Figure 1. Fixed Output-Voltage Configuration V IN 7.5V TO 76V 68µF BYPASS 0.47µF Figure 2. Adjustable Output-Voltage ...

Page 11

High-Efficiency MAXPower Step-Down Thermal-overload protection is intended to protect the MAX5090 in the event of a fault condition. For normal circuit operation, do not exceed the absolute maximum junction temperature rating +150°C. J Setting the ...

Page 12

High-Efficiency MAXPower Step-Down DC-DC Converters ∆ V ESR = ESR IN  ∆ +  I OUT  2 × − OUT = C IN ∆ × where: − ...

Page 13

High-Efficiency MAXPower Step-Down In a dynamic load application, the allowable deviation of the output voltage during the fast transient load dic- tates the output capacitance value and the ESR. The output capacitors supply the step-load current until the ...

Page 14

High-Efficiency MAXPower Step-Down DC-DC Converters BYPASS R1 R2 Figure 4. Fixed Output Voltage Table 2. Typical External Components Selection (Circuit of Figure 4) V (V) V (V) I (A) IN OUT OUT 6.5 ...

Page 15

High-Efficiency MAXPower Step-Down Table 2. Typical External Components Selection (Circuit of Figure 4) (continued) V (V) V (V) I (A) IN OUT OUT 6 3 ...

Page 16

High-Efficiency MAXPower Step-Down DC-DC Converters V IN 12V C IN 68µF C BYPASS PTC R t *LOCATE PTC AS CLOSE TO HEAT-DISSIPATING COMPONENT AS POSSIBLE. Figure 5. Load-Temperature Monitoring with ON/OFF (Requires Accurate V Chip Information PROCESS: BCD ...

Page 17

... 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 ____________________ 17 © 2006 Maxim Integrated Products ...

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