MAX830-MAX833 Maxim, MAX830-MAX833 Datasheet
MAX830-MAX833
Manufacturer Part Number
MAX830-MAX833
Description
5V/3.3V/3V/Adjustable-Output / 1A / Step-Down / PWM / Switch-Mode DC-DC Regulators
Manufacturer
Maxim
Datasheet
1.MAX830-MAX833.pdf
(5 pages)
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.
19-0167; Rev 2; 6/95
Call toll free 1-800-998-8800 for free samples or literature.
Step-Down, PWM, Switch-Mode DC-DC Regulators
__________Typical Operating Circuit
_______________General Description
_______________________Applications
100 F
8V TO 30V
* CoilCraft DO3316-104
Distributed Power from High-Voltage Buses
High-Current, High-Voltage Step-Down Applications
Multiple-Output Buck Converter
10k
INPUT
0.047 F
V IN
V C
STEP-DOWN CONVERTER
________________________________________________________________ Maxim Integrated Products
MAX831
GND
SENSE
V SW
MBR350
5V/3.3V/3V/Adjustable-Output, 1A,
100 H*
5V AT 1A
OUTPUT
470 F
MAX830CWE
MAX831CWE
MAX832CWE
MAX833CWE
__________________Pin Configuration
______________Ordering Information
___________________________Features
TOP VIEW
* THIS THERMAL RESISTANCE NUMBER IS WITH THE DEVICE WELL MOUNTED
Input Range: Up to 30V
1A On-Chip Power Switch
Adjustable Output (MAX830)
Fixed Outputs: 5V (MAX831)
100kHz Switching Frequency
Excellent Dynamic Characteristics
Few External Components
8mA Quiescent Current
16-Pin SO Package
Evaluation Kit Available
( ) ARE FOR MAX830
ON 1 oz. COPPER WITH THERMAL PASTE BETWEEN THE IC AND THE
UNDERLYING GROUND PLANE. LOWER THERMAL RESISTANCE IS POSSIBLE
(SEE APPLICATIONS SECTION).
PART
(FB) SENSE
GND
GND
I
V
V
V
V
LIM
IN
IN
IN
IN
T
j
( MAX ) = +125°C,
1
2
3
4
5
6
7
8
TEMP. RANGE
3.3V (MAX832)
3V (MAX833)
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Wide SO
MAX830
MAX831
MAX832
MAX833
jA =
16
15
14
13
12
11
10
+55°C/W*
9
PIN-PACKAGE
16 Wide SO
16 Wide SO
16 Wide SO
16 Wide SO
V
V
V
V
GND
V
GND
SHUT
SW
SW
SW
SW
C
1
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