MAX682 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 3.3V-Input to Regulated 5V-Output Charge Pumps

19-0177; Rev 1; 8/98
3.3V-Input to Regulated 5V-Output
Charge Pumps
General Description
The MAX682/MAX683/MAX684 charge-pump regula-
tors generate 5V from a 2.7V to 5.5V input. They are
specifically designed to serve as high-efficiency auxil-
iary supplies in applications that demand a compact
design. The MAX682, MAX683, and MAX684 deliver
250mA, 100mA, and 50mA output current, respectively.
These complete 5V regulators require only one resistor
and three external capacitors—no inductors are need-
ed. High switching frequencies (externally adjustable
up to 2MHz) and a unique regulation scheme allow the
use of capacitors as small as 1µF per 100mA of output
current. The MAX683/MAX684 are offered in a space-
saving 8-pin µMAX package that is only 1.1mm high,
while the MAX682 is available in an 8-pin SO.
Features
o Ultra-Small: 1µF Capacitors per 100mA of Output
Current
o No Inductors Required
o 1.1mm Height in µMAX Package (MAX683/MAX684)
o Up to 250mA Output Current (MAX682)
o Regulated ±4% Output Voltage
o 50kHz to 2MHz Adjustable Switching Frequency
o 2.7V to 5.5V Input Voltage
o 100µA Quiescent Current in Pulse-Skipping Mode
o 0.1µA Shutdown Current
Applications
Flash Memory Supplies
Battery-Powered Applications
Miniature Equipment
PCMCIA Cards
3.3V to 5V Local Conversion Applications
Backup-Battery Boost Converters
3V to 5V GSM SIMM Cards
PART
MAX682ESA
MAX683EUA
MAX684EUA
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
8 µMAX
8 µMAX
Typical Operating Circuit
Pin Configurations
INPUT
2.7V TO 5.5V
R_EXT
CXN
CXP
MAX682
IN
OUT
SKIP
SHDN
GND
PGND
OUTPUT
5V/250mA
TOP VIEW
SKIP 1
SHDN 2
IN 3
GND 4
MAX682
SO
8 OUT SKIP 1
7 CXP SHDN 2
6 CXN
IN 3
5 PGND GND 4
MAX683
MAX684
µMAX
8 OUT
7 CXP
6 CXN
5 PGND
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.