MAX1676 Datasheet PDF - Maxim Integrated
| Part Number | MAX1676 | |
| Description | Step-Up DC-DC Converters | |
| Manufacturers | Maxim Integrated | |
| Logo |  |
|
|
There is a preview and MAX1676 download ( pdf file ) link at the bottom of this page. Total 12 Pages | ||
Preview 1 page No Preview Available !
AVAILABLE
EVALUATION KIT AVAILABLE
MAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
General Description
The MAX1674/MAX1675/MAX1676 compact, high-effi-
ciency, step-up DC-DC converters fit in small µMAX
packages. They feature a built-in synchronous rectifier,
which improves efficiency and reduces size and cost
by eliminating the need for an external Schottky diode.
Quiescent supply current is only 16µA.
The input voltage ranges from 0.7V to VOUT, where
VOUT can be set from 2V to 5.5V. Start-up is guaran-
teed from 1.1V inputs. The MAX1674/MAX1675/
MAX1676 have a preset, pin-selectable output for 5V or
3.3V. The outputs can also be adjusted to other volt-
ages using two external resistors.
All three devices have a 0.3Ω N-channel MOSFET
power switch. The MAX1674 has a 1A current limit. The
MAX1675 has a 0.5A current limit, which permits the
use of a smaller inductor. The MAX1676 comes in a
10-pin µMAX package and features an adjustable cur-
rent limit and circuitry to reduce inductor ringing.
________________________Applications
Pagers
Wireless Phones
Medical Devices
Hand-Held Computers
PDAs
RF Tags
1 to 3-Cell Hand-Held Devices
Functional Diagrams
Typical Operating Circuit
INPUT
0.7V TO VOUT
ON
OFF
SHDN
LX
MAX1674 OUT
MAX1675
OUTPUT
3.3V, 5V, OR
ADJ (2V TO 5.5V)
UP TO 300mA
LOW-BATTERY
DETECT IN
LBI LBO
REF FB GND
LOW-BATTERY
DETECT OUT
Pin Configuration0s.1µaFppear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
____________________________Features
o 94% Efficient at 200mA Output Current
o 16µA Quiescent Supply Current
o Internal Synchronous Rectifier (no external diode)
o 0.1µA Logic-Controlled Shutdown
o LBI/LBO Low-Battery Detector
o Selectable Current Limit for Reduced Ripple
o Low-Noise, Anti-Ringing Feature (MAX1676)
o 8-Pin and 10-Pin µMAX Packages
o Preassembled Evaluation Kit (MAX1676EVKIT)
_______________Ordering Information
PART
MAX1674EUA
MAX1675EUA
MAX1676EUB
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 µMAX
10 µMAX
TOP VIEW
Pin Configurations
FB 1
LBI 2
LBO 3
REF 4
MAX1674
MAX1675
8 OUT
7 LX
6 GND
5 SHDN
µMAX
FB 1
LBI 2
LBO 3
CLSEL 4
REF 5
MAX1676
µMAX
10 OUT
9 LX
8 GND
7 BATT
6 SHDN
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1360; Rev 3; 3/00
|
| |
 
MAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
Typical Operating Characteristics (continued)
(L = 22µH, CIN = 47µF, COUT = 47µF 0.1µF, CREF = 0.1µF, TA = +25°C, unless otherwise noted.)
NO-LOAD BATTERY CURRENT
vs. INPUT BATTERY VOLTAGE
160
140
120 ILIMIT = 1A, 5.0V
100
80
ILIMIT = 0.5A, 5.0V
60
40 ILIMIT = 0.5A, 3.3V
20
0
0
ILIMIT = 1A, 3.3V
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
INPUT BATTERY VOLTAGE (V)
SHUTDOWN THRESHOLD
vs. SUPPLY VOLTAGE
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
START-UP VOLTAGE
vs. LOAD CURRENT
1.8
1.6
1.4
1.2 WITHOUT DIODE
1.0
0.8
0.6 WITH 1N5817
0.4
0.2
0
0.01
0.1 1 10
LOAD CURRENT (mA)
100
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (VOUT = 5V)
900
800
700
1A CURRENT LIMIT
600
500
400
300
200
0.5A CURRENT LIMIT
100
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1674 TOC13
VLX
5V/div
ILX
0.5A/div
VIN = 2.4V
VOUT = 5.0V
1µs/div
VOUT
AC COUPLED
100mV/div
SWITCH RESISTANCE vs. TEMPERATURE
0.45
0.40 P-CHANNEL
0.35
0.30
0.25 N-CHANNEL
0.20
0.15
0.10
0.05
0
-60 -40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
1 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (VOUT = 3.3V)
800
700
600
1A CURRENT LIMIT
500
400
300
200
0.5A CURRENT LIMIT
100
0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
INPUT VOLTAGE (V)
LX CURRENT LIMIT
vs. OUTPUT VOLTAGE
1.2
MAX1674, MAX1676 (CLSEL = OUT)
1.0
0.8
0.6
0.4 MAX1675, MAX1676 (CLSEL = GND)
0.2
0
2.0
2.5 3.0 3.5 4.0 4.5
OUTPUT VOLTAGE (V)
5.0
Maxim Integrated
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for MAX1676 electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ MAX1676.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| MAX167 | The function is (MAX163 - MAX167) CMOS 12-Bit A/D Converters. Maxim Integrated Products |  |
| MAX1672 | The function is Step-Up/Down DC-DC Converter in QSOP Package. Maxim Integrated | |
| MAX1672EEE | The function is Step-Up/Down DC-DC Converter in QSOP Package. Maxim Integrated | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
MAX1
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||