MAX1595_11 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – Regulated 3.3V/5.0V Step-Up/Step-Down Charge Pump

19-2107; Rev 3; 10/11
Regulated 3.3V/5.0V Step-Up/Step-Down
Charge Pump
General Description
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.
Applications
White LED Power
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
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
INPUT
CXN
CXP
MAX1595
IN
OUT
SHDN
AOUT
PGND GND
OUTPUT
Features
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
o Load Disconnect in Shutdown
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX1595EUA33+ -40°C to +85°C ^{8 µMAX}
MAX1595ETC33+ _{-40°C to +85°C} 12 TQFN-EP*
MAX1595EUA50+ _{-40°C to +85°C} 8 µMAX
MAX1595ETC50+ _{-40°C to +85°C} 12 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Selector Guide
PART
V_OUT (V)**
TOP MARK
MAX1595EUA33+
3.3
—
MAX1595ETC33+
3.3
AAEH
MAX1595EUA50+
5.0
—
MAX1595ETC50+
5.0
AAEI
**Contact factory for other fixed-output voltages from 2.7V to 5.0V.
Pin Configurations
TOP VIEW
AOUT 1
SHDN 2
IN 3
GND 4
MAX1595
µMAX
8 OUT
7 CXP
6 CXN
5 PGND
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.