19-2107; Rev 3; 10/11
Regulated 3.3V/5.0V Step-Up/Step-Down
Charge Pump
MAX195
General Description
Features
The MAX1595 charge-pump regulator generates either
3.3V or 5V from a 1.8V to 5.5V input. The unique control
architecture allows the regulator to step up or step down
the input voltage to maintain output regulation. The
1MHz switching frequency, combined with a unique
control scheme, allows the use of a ceramic capacitor
as small as 1µF for 125mA of output current. The com-
plete regulator requires three external capacitors—no
inductor is needed. The MAX1595 is specifically
designed to serve as a high-power, high- efficiency aux-
iliary supply in applications that demand a compact
design. The MAX1595 is offered in space-saving 8-pin
µMAX® and high-power 12-pin TQFN packages.
o Ultra-Small: Requires Only Three Ceramic
Capacitors
o No Inductors Required
o Up to 125mA Output Current
o Regulated 3% Output Voltage
o 1MHz Switching Frequency
o 1.8V to 5.5V Input Voltage
o 220µA Quiescent Current
o 0.1µA Shutdown Current
Applications
o Load Disconnect in Shutdown
White LED Power
Ordering Information
Flash Memory Supplies
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
Battery-Powered Applications
Miniature Equipment
MAX1595EUA33+
MAX1595ETC33+
MAX1595EUA50+
12 TQFN-EP*
8 µMAX
PCMCIA Cards
3.3V to 5V Local Conversion Applications
Backup-Battery Boost Converters
3V to 5V GSM SIMM Cards
MAX1595ETC50+
12 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Selector Guide
µMAX is a registered trademark of Maxim Integrated Products, Inc.
PART
V
(V)**
TOP MARK
—
OUT
MAX1595EUA33+
MAX1595ETC33+
MAX1595EUA50+
3.3
AAEH
—
3.3
5.0
5.0
Typical Operating Circuit
MAX1595ETC50+
AAEI
**Contact factory for other fixed-output voltages from 2.7V to 5.0V.
Pin Configurations
CXN
CXP
MAX1595
TOP VIEW
INPUT
OUTPUT
IN
OUT
AOUT
AOUT
SHDN
IN
1
2
3
4
8
7
6
5
OUT
SHDN
CXP
MAX1595
CXN
PGND
PGND GND
GND
µMAX
Pin Configurations continued at end of data sheet.
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.