|
|
Part: MAX5033AUPA
Category:
Power Management
-> DC-DC Converters
-> Step-down
Description: 500mA, 76V, High-Efficiency, Maxpower Step-down DC-DC Converter <<<>>>The MAX5033 Easy-to-use, High-efficiency, High-voltage, Step-down DC-DC Converter Operates From an Input Voltage up to 76V And Consumes Only 350µA Quiescent Current at no Load. This Pulse-width Modulated (PWM) Converter Operates at a Fixed 125kHz Switching Frequency at Heavy Loads, And Automatically Switches to Pulseskipping 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-onresistance, 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. <<<>>>KEY Features Applications <<<>>>Wide 7.5V to 76V Input Voltage Range <<<>>>Fixed (3.3V, 5V, 12V) And Adjustable (1.25V to 13.2V) Voltage Versions <<<>>>500mA Output Current <<<>>>Efficiency up to 94% <<<>>>Internal 0.4 High-side Dmos Fet <<<>>>350µA Quiescent Current at no Load, 10µA Shutdown Current <<<>>>Internal Frequency Compensation <<<>>>Fixed 125kHz Switching Frequency <<<>>>Thermal Shutdown And Short-circuit Current Limit <<<>>>8-Pin so And Pdip Packages <<<>>> Automotive<<<>>><<<>>>consumer Electronics<<<>>><<<>>>distributed Power<<<>>><<<>>>industrial
Company: Maxim Integrated Products
Datasheet: Download MAX5033AUPA datasheet File size : 371 kB
Request For quote: Find where to buy MAX5033AUPA
Datasheet text preview:
19-2979; Rev 1; 5/04
500mA, 76V, High-Efficiency, MAXPower Step-Down DC-DC Converter
General Description
The MAX5033 easy-to-use, high-efficiency, high-voltage, step-down DC-DC converter operates from an input voltage up to 76V and consumes only 350µA quiescent curr e n t at no load. This pulse-width modulated (PWM) converter operates at a fixed 125kHz switching frequency at heavy loads, and automatically switches to pulseskipping mode to provide low quiescent current and high efficiency at light loads. The MAX5033 includes i n t e r n a l frequency compensation simplifying circuit implementation. The device uses an internal low-onresistance, 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.
Features
Wide 7.5V to 76V Input Voltage Range Fixed (3.3V, 5V, 12V) and Adjustable (1.25V to 13.2V) Voltage Versions 500mA Output Current Efficiency Up to 94% Internal 0.4 High-Side DMOS FET 350µ A Quiescent Current at No Load, 10µA Shutdown Current Internal Frequency Compensation Fixed 125kHz Switching Frequency Thermal Shutdown and Short-Circuit Current Limit 8-Pin SO and PDIP Packages
MAX5033
Ordering Information
PART MAX5033AUSA MAX5033AUPA MAX5033AASA* MAX5033BUSA MAX5033BUPA MAX5033BASA* MAX5033CUSA MAX5033CUPA MAX5033CASA MAX5033DUSA MAX5033DUPA MAX5033DASA* TEMP RANGE 0°C to +85°C 0°C to +85°C -40°C to +125°C 0°C to +85°C 0°C to +85°C -40°C to +125°C 0°C to +85°C 0°C to +85°C -40°C to +125°C 0°C to +85°C 0°C to +85°C -40°C to +125°C OUTPUT PINVOLTAGE PACKAGE (V) 8 SO 8 PDIP 8 SO 8 SO 8 PDIP 8 SO 8 SO 8 PDIP 8 SO 8 SO 8 PDIP 8 SO ADJ 12 5.0 3.3
Applications
Automotive Consumer Electronics Industrial Distributed Power
*Future product--contact factory for availability.
Typical Operating Circuit
VIN 7.5V TO 76V 47µF VIN BST 0.1µF
Pin Configuration
BST
220µH VOUT 5V, 0.5A 33µF
1 2 3 4
8
LX VIN GND ON/OFF
MAX5033
R1 ON/OFF ON R2 OFF SGND GND FB VD 0.1µF LX
VD SGND FB
D1 50SQ100
MAX5033
7 6 5
SO/PDIP
________________________________________________________________ Maxim Integrated Products
1
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.
500mA, 76V, High-Efficiency, MAXPower Step-Down DC-DC Converter MAX5033
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND, unless otherwise specified.) VIN .......-0.3V to +80V SGND ...........-0.3V to +0.3V LX ........-0.8V to (VIN + 0.3V) BST ......-0.3V to (VIN + 10V) BST (transient < 100ns) ........-0.3V to (VIN + 15V) BST to LX.......-0.3V to +10V BST to LX (transient < 100ns) ........-0.3V to +15V ON/OFF ........-0.3V to (VIN + 0.3V) VD .........-0.3V to +12V FB MAX5033A/MAX5033B/MAX5033C ..........-0.3V to +15V MAX5033D .........-0.3V to +12V VOUT Short-Circuit Duration..........Indefinite VD Short-Circuit Duration ....Indefinite Continuous Power Dissipation (TA = +70°C) 8-Pin PDIP (derate 9.1mW/°C above +70°C)......727mW 8-Pin SO (derate 5.9mW/°C above +70°C).........471mW Operating Temperature Range MAX5033_U_ _ .........0°C to +85°C MAX5033_A_ _ ....-40°C to +125°C Storage Temperature Range .....-65°C to +150°C Junction Temperature ......+150°C Lead Temperature (soldering, 10s) .........+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS (MAX5033_U_ _)
(VIN = +12V, VON/OFF = +12V, IOUT = 0, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. See the Typical Application Circuit.)
PARAMETER SYMBOL MAX5033A Input Voltage Range VIN MAX5033B MAX5033C MAX5033D Undervoltage Lockout UVLO MAX5033A, VIN = 7.5V to 76V, IOUT = 20mA to 500mA Output Voltage V OUT MAX5033B, VIN = 7.5V to 76V, IOUT = 20mA to 500mA MAX5033C, VIN = 15V to 76V, IOUT = 20mA to 500mA Feedback Voltage VFB VIN = 7.5V to 76V, MAX5033D VIN = 12V, ILOAD = 500mA, MAX5033A VIN = 12V, ILOAD = 500mA, MAX5033B Efficiency VIN = 24V, ILOAD = 500mA, MAX5033C VIN = 12V, VOUT = 5V, ILOAD = 500mA, MAX5033D VFB = 3.5V, VIN = 7.5V to 76V, MAX5033A Quiescent Supply Current IQ VFB = 5.5V, VIN = 7.5V to 76V, MAX5033B VFB = 13V, VIN = 15V to 76V, MAX5033C VFB = 1.3V, MAX5033D Shutdown Current Peak Switch Current Limit Switch Leakage Current IS H D N ILIM IOL VON/OFF = 0V, VIN = 7.5V to 76V (Note 1) VIN = 76V, VON/OFF = 0V, VLX = 0V 0.95 3.185 4.85 11.64 1.192 CONDITIONS MIN 7.5 7.5 15 7.5 5.2 3.3 5.0 12 1.221 86 90 94 90 350 350 350 350 10 1.5 1 460 460 460 460 45 2.00 µA A µA µA % 3.415 5.15 12.36 1.250 V V TYP MAX 76.0 76.0 76 76.0 V V UNITS
2
_______________________________________________________________________________________
500mA, 76V, High-Efficiency, MAXPower Step-Down DC-DC Converter
ELECTRICAL CHARACTERISTICS (MAX5033_U_ _) (continued)
(VIN = +12V, VON/OFF = +12V, IOUT = 0, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. See the Typical Application Circuit.)
PARAMETER Switch On-Resistance PFM Threshold FB Input Bias Current ON/OFF CONTROL INPUT ON/OFF Input-Voltage Threshold ON/OFF Input-Voltage Hysteresis ON/OFF Input Current OSCILLATOR Oscillator Frequency Maximum Duty Cycle VOLTAGE REGULATOR Regulator Output Voltage Dropout Voltage Load Regulation Thermal Resistance (Junction to Ambient) THERMAL SHUTDOWN Thermal-Shutdown Junction Temperature Thermal-Shutdown Hysteresis TSH THYST +160 20 °C °C VD/IVD PACKAGE THERMAL CHARACTERISTICS JA SO package (JEDEC 51) DIP package (JEDEC 51) 170 110 °C/W VD VIN = 8.5V to 76V, IL = 0mA 7.5V VIN 8.5V, IL = 1mA 0 to 5mA 6.9 7.8 2.0 150 8.8 V V fOSC D MAX MAX5033D 109 125 95 135 kHz % VON/OFF V HYST ION/OFF VON/OFF = 0V to VIN Rising trip point 1.53 1.69 100 10 150 1.85 V mV nA SYMBOL RD S ( O N ) IPFM IB CONDITIONS ISWITCH = 500mA Minimum switch current in any cycle MAX5033D 35 -12 MIN TYP 0.4 65 +0.01 MAX 0.80 90 +12 UNITS mA nA
MAX5033
ELECTRICAL CHARACTERISTICS (MAX5033_A_ _)
(VIN = +12V, VON/ OFF = +12V, IOUT = 0, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. See the Typical Application Circuit.) (Note 2)
PARAMETER SYMBOL MAX5033A Input Voltage Range VIN MAX5033B MAX5033C MAX5033D Undervoltage Lockout UVLO MAX5033A, VIN = 7.5V to 76V, IOUT = 20mA to 500mA Output Voltage V OUT MAX5033B, VIN = 7.5V to 76V, IOUT = 20mA to 500mA MAX5033C, VIN = 15V to 76V, IOUT = 20mA to 500mA 3.185 4.825 11.58 CONDITIONS MIN 7.5 7.5 15 7.5 5.2 3.3 5.0 12 3.415 5.175 12.42 V TYP MAX 76.0 76.0 76 76.0 V V UNITS
_______________________________________________________________________________________
3
Others parts begin by ma
|
|
|
