MAX833 Datasheet PDF


Part Number

MAX833

Description

5V/3.3V/3V/Adjustable-Output / 1A / Step-Down / PWM / Switch-Mode DC-DC Regulators

Manufacture

Maxim

Total Page 5 Pages
PDF Download
Download MAX833 Datasheet PDF


Features Datasheet pdf 19-0167; Rev 2; 6/95 5V/3.3V/3V/Adjusta ble-Output, 1A, Step-Down, PWM, Switch- Mode DC-DC Regulators _______________Ge neral Description The MAX830/MAX831/MAX 832/MAX833 are monolithic, bipolar, pul se-width-modulation (PWM), switch-mode, stepdown DC-DC regulators. Each is rat ed at 1A. Very few external components are needed for standard operation becau se the power switch, oscillator, feedba ck, and control circuitry are all on-ch ip. Employing a classic buck topology, these regulators perform high-current s tep-down functions. These regulators ha ve excellent dynamic and transient resp onse characteristics, while featuring c ycle-by-cycle current limiting to prote ct against overcurrent faults and sh.
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MAX833 Datasheet
19-0167; Rev 2; 6/95
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5V/3.3V/3V/Adjustable-Output, 1A,
Step-Down, PWM, Switch-Mode DC-DC Regulators
_______________General Description
The MAX830/MAX831/MAX832/MAX833 are monolithic,
bipolar, pulse-width-modulation (PWM), switch-mode, step-
down DC-DC regulators. Each is rated at 1A. Very few
external components are needed for standard operation
because the power switch, oscillator, feedback, and control
circuitry are all on-chip. Employing a classic buck topology,
these regulators perform high-current step-down functions.
These regulators have excellent dynamic and transient
response characteristics, while featuring cycle-by-cycle cur-
rent limiting to protect against overcurrent faults and short-
circuit output faults. They have a wide 8V to 30V input
range. Outputs for the MAX831/MAX832/MAX833 are fixed
at 5V/3.3V/3V, respectively. The MAX830 output is
adjustable.
Available in 16-pin SO packages, the MAX830–MAX833
have a preset 100kHz oscillator frequency. In addition,
the preset current limit and micropower shutdown can be
externally controlled. See the MAX724/MAX726 data
sheet for more applications information.
_______________________Applications
Distributed Power from High-Voltage Buses
High-Current, High-Voltage Step-Down Applications
Multiple-Output Buck Converter
___________________________Features
o Input Range: Up to 30V
o 1A On-Chip Power Switch
o Adjustable Output (MAX830)
Fixed Outputs: 5V (MAX831)
3.3V (MAX832)
3V (MAX833)
o 100kHz Switching Frequency
o Excellent Dynamic Characteristics
o Few External Components
o 8mA Quiescent Current
o 16-Pin SO Package
o Evaluation Kit Available
______________Ordering Information
PART
MAX830CWE
MAX831CWE
MAX832CWE
MAX833CWE
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
16 Wide SO
16 Wide SO
16 Wide SO
16 Wide SO
__________Typical Operating Circuit __________________Pin Configuration
INPUT
8V TO 30V
100µF
VIN VSW
MAX831
VC SENSE
10k
GND
0.047µF
100µH*
OUTPUT
5V AT 1A
MBR350
470µF
STEP-DOWN CONVERTER
* CoilCraft DO3316-104
TOP VIEW
VIN 1
VIN 2
VIN 3
VIN 4
GND 5
ILIM 6
GND 7
(FB) SENSE 8
MAX830
MAX831
MAX832
MAX833
16 VSW
15 VSW
14 VSW
13 VSW
12 GND
11 VC
10 GND
9 SHUT
Wide SO
Tj (MAX) = +125°C, θjA = +55°C/W*
( ) ARE FOR MAX830
* THIS THERMAL RESISTANCE NUMBER IS WITH THE DEVICE WELL MOUNTED
ON 1 oz. COPPER WITH THERMAL PASTE BETWEEN THE IC AND THE
UNDERLYING GROUND PLANE. LOWER THERMAL RESISTANCE IS POSSIBLE
(SEE APPLICATIONS SECTION).
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.




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