MAX1674-MAX1676 Maxim, MAX1674-MAX1676 Datasheet
MAX1674-MAX1676
Manufacturer Part Number
MAX1674-MAX1676
Description
High-Efficiency / Low-Supply-Current / Compact / Step-Up DC-DC Converters
Manufacturer
Maxim
Datasheet
1.MAX1674-MAX1676.pdf
(12 pages)
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 V
V
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
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
19-1360; Rev 0; 7/98
OUT
LOW-BATTERY
ON
DETECT IN
can be set from 2V to 5.5V. Start-up is guaran-
Pagers
Wireless Phones
Medical Devices
Hand-Held Computers
PDAs
RF Tags
1 to 3-Cell Hand-Held Devices
OFF
0.7V TO V
INPUT
Typical Operating Circuit
0.1 F
OUT
________________________________________________________________ Maxim Integrated Products
LBI
SHDN
REF
General Description
MAX1674
MAX1675
FB
Compact, Step-Up DC-DC Converters
High-Efficiency, Low-Supply-Current,
GND
OUT
LBO
LX
ADJ (2V TO 5.5V)
UP TO 300mA
3.3V, 5V, OR
OUTPUT
OUT
LOW-BATTERY
DETECT OUT
, where
_______________Ordering Information
____________________________Features
MAX1674EUA
MAX1675EUA
MAX1676EUB
94% Efficient at 200mA Output Current
16µA Quiescent Supply Current
Internal Synchronous Rectifier (no external diode)
0.1µA Logic-Controlled Shutdown
LBI/LBO Low-Battery Detector
Selectable Current Limit for Reduced Ripple
Low-Noise, Anti-Ringing Feature (MAX1676)
8-Pin and 10-Pin µMAX Packages
Preassembled Evaluation Kit (MAX1676EVKIT)
TOP VIEW
PART
CLSEL
LBO
LBO
REF
REF
LBI
LBI
FB
FB
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
-40°C to +85°C
1
2
3
4
1
2
3
4
5
MAX1674
MAX1675
MAX1676
Pin Configurations
MAX
MAX
10
6
5
9
8
7
6
8
7
8 µMAX
8 µMAX
10 µMAX
PIN-PACKAGE
OUT
LX
GND
OUT
LX
GND
BATT
SHDN
SHDN
1
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