MAX5033DASA Maxim Integrated Products, MAX5033DASA Datasheet

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MAX5033DASA

Manufacturer Part Number
MAX5033DASA
Description
DC/DC Switching Converters 500mA 76V MAXPower Step-Down
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5033DASA

Output Voltage
13.2 V
Output Current
0.5 A
Switching Frequency
125 KHz
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
SOIC-8
Minimum Operating Temperature
- 40 C
Number Of Outputs
1
Supply Current
270 uA

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The MAX5033 easy-to-use, high-efficiency, high-voltage,
step-down DC-DC converter operates from an input volt-
age up to 76V and consumes only 270µA quiescent cur-
rent at no load. This pulse-width modulated (PWM)
converter operates at a fixed 125kHz switching frequen-
cy at heavy loads, and automatically switches to pulse-
skipping mode to provide low quiescent current and
high efficiency at light loads. The MAX5033 includes
internal frequency compensation simplifying circuit
implementation. The device uses an internal low-on-
resistance, high-voltage, DMOS transistor to obtain high
efficiency and reduce overall system cost. This device
includes undervoltage lockout, cycle-by-cycle current
limit, hiccup-mode output short-circuit protection, and
thermal shutdown.
The MAX5033 delivers up to 500mA output current.
The output current may be limited by the maximum
power dissipation capability of the package. External
shutdown is included, featuring 10µA (typ) shutdown
current. The MAX5033A/B/C versions have fixed output
voltages of 3.3V, 5V, and 12V, respectively, while the
MAX5033D features an adjustable output voltage, from
1.25V to 13.2V.
The MAX5033 is available in space-saving 8-pin SO
and 8-pin plastic DIP packages and operates over the
automotive (-40°C to +125°C) temperature range.
19-2979; Rev 4; 4/10
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
OFF
V
47µF
Automotive
Consumer Electronics
Industrial
Distributed Power
IN
ON
R1
R2
Typical Operating Circuit
ON/OFF
________________________________________________________________ Maxim Integrated Products
V
SGND
IN
500mA, 76V, High-Efficiency, MAXPower
MAX5033
General Description
GND
BST
VD
LX
FB
0.1µF
0.1µF
D1
50SQ100
Applications
220µH
Step-Down DC-DC Converter
33µF
V
5V, 0.5A
OUT
o Wide 7.5V to 76V Input Voltage Range
o Fixed (3.3V, 5V, 12V) and Adjustable (1.25V to
o 500mA Output Current
o Efficiency Up to 94%
o Internal 0.4Ω High-Side DMOS FET
o 270µA Quiescent Current at No Load, 10µA
o Internal Frequency Compensation
o Fixed 125kHz Switching Frequency
o Thermal Shutdown and Short-Circuit Current Limit
o 8-Pin SO and PDIP Packages
This product is available in both leaded(Pb) and lead(Pb)-free
packages. To order the lead(Pb)-free package, add a + after
the part number.
MAX5033AUSA
MAX5033AUPA
MAX5033AASA
MAX5033BUSA
MAX5033BUPA
MAX5033BASA
MAX5033CUSA
MAX5033CUPA
MAX5033CASA
MAX5033DUSA
MAX5033DUPA
MAX5033DASA
13.2V) Voltage Versions
Shutdown Current
PART
SGND
BST
VD
FB
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
0°C to +85°C
0°C to +85°C
0°C to +85°C
0°C to +85°C
0°C to +85°C
0°C to +85°C
0°C to +85°C
0°C to +85°C
1
2
3
4
Ordering Information
MAX5033
SO/PDIP
Pin Configuration
PIN-
PACKAGE
8 SO
8 PDIP
8 SO
8 SO
8 PDIP
8 SO
8 SO
8 PDIP
8 SO
8 SO
8 PDIP
8 SO
8
7
6
5
LX
V
GND
ON/OFF
IN
Features
VOLTAGE
OUTPUT
ADJ
3.3
5.0
(V)
12
1

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MAX5033DASA Summary of contents

Page 1

... MAX5033AUSA MAX5033AUPA MAX5033AASA MAX5033BUSA MAX5033BUPA MAX5033BASA MAX5033CUSA Applications MAX5033CUPA MAX5033CASA MAX5033DUSA MAX5033DUPA MAX5033DASA This product is available in both leaded(Pb) and lead(Pb)-free packages. To order the lead(Pb)-free package, add a + after the part number. 220µH V OUT 5V, 0.5A D1 50SQ100 33µF Features Ordering Information ...

Page 2

High-Efficiency, MAXPower Step-Down DC-DC Converter ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND, unless otherwise specified.) V .........................................................................-0.3V to +80V IN SGND ....................................................................-0.3V to +0.3V LX.................................................................-0. BST ...............................................................-0. BST (transient < 100ns) ................................-0. ...

Page 3

High-Efficiency, MAXPower ELECTRICAL CHARACTERISTICS (MAX5033_U_ _) (continued +12V +12V ON/OFF OUT Typical Operating Circuit .) PARAMETER SYMBOL Switch On-Resistance R PFM Threshold FB Input Bias Current ON/OFF CONTROL INPUT ...

Page 4

High-Efficiency, MAXPower Step-Down DC-DC Converter ELECTRICAL CHARACTERISTICS (MAX5033_A_ _) (continued +12V +12V OFF IN ON OUT the Typical Operating Circuit .) (Note 2) PARAMETER SYMBOL Feedback Voltage Efficiency Quiescent ...

Page 5

High-Efficiency, MAXPower (V = 12V 12V -40°C to +125°C, unless otherwise noted. Typical values are ON/OFF A Operating Circuit , if applicable.) V vs. TEMPERATURE OUT (MAX5033CASA 12V) OUT ...

Page 6

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

Page 7

High-Efficiency, MAXPower (V = 12V 12V -40°C to +125°C, unless otherwise noted. Typical values are ON/OFF A Operating Circuit , if applicable.) MAX5033BASA LX WAVEFORMS MAX5033 toc19 4µs/div ...

Page 8

High-Efficiency, MAXPower Step-Down DC-DC Converter PIN NAME 1 BST Boost Capacitor Connection. Connect a 0.1µF ceramic capacitor from BST to LX Internal Regulator Output. Bypass VD to GND with a 0.1µF ceramic capacitor. 3 SGND Internal ...

Page 9

High-Efficiency, MAXPower Detailed Description The MAX5033 step-down DC-DC converter operates from a 7.5V to 76V input voltage range. A unique volt- age-mode control scheme with voltage feed-forward and an internal switching DMOS FET provides high effi- ciency over ...

Page 10

High-Efficiency, MAXPower Step-Down DC-DC Converter The MAX5033 features internal compensation for opti- mum closed-loop bandwidth and phase margin. With the preset compensation strongly advised to sense the output immediately after the primary LC. Inductor Selection The ...

Page 11

High-Efficiency, MAXPower Ensure that the ripple specification of the input capaci- tor exceeds the worst-case capacitor RMS ripple cur- rent. Use the following equations to calculate the input capacitor RMS current − CRMS ...

Page 12

High-Efficiency, MAXPower Step-Down DC-DC Converter Figure 2. Fixed Output Voltages Table 2. Typical External Components Selection (Circuit of Figure 2) V ( OUT OUT 7 3.3 0.5 7.5 ...

Page 13

High-Efficiency, MAXPower Table 2. Typical External Components Selection (Circuit of Figure 2) (continued) V ( OUT OUT 3.3 0 0.5 3.3 0 0.5 12 0.5 ______________________________________________________________________________________ ...

Page 14

High-Efficiency, MAXPower Step-Down DC-DC Converter Table 3. Component Suppliers SUPPLIER AVX Coilcraft Diodes Incorporated Nichicon Panasonic SANYO TDK Vishay V IN 12V C IN 47µF *LOCATE PTC AS CLOSE TO HEAT-DISSIPATING COMPONENTS AS POSSIBLE. Figure 3. Load Temperature ...

Page 15

High-Efficiency, MAXPower V IN 7.5V TO 36V C 47µF C' 68µF Figure 4. Dual-Sequenced DC-DC Converters (Startup Delay Determined by R1/R1’, Ct/Ct’ and Rt/Rt’) ______________________________________________________________________________________ Step-Down DC-DC Converter MAX5033B FB R1 BST ON/OFF ...

Page 16

High-Efficiency, MAXPower Step-Down DC-DC Converter For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different ...

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 © 2010 Maxim Integrated Products ...

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