MAX1722_12 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 1.5μA IQ, Step-Up DC-DC Converters in Thin SOT23-5

MAX1722/MAX1723/
MAX1724
1.5µA I_Q, Step-Up DC-DC Converters
in Thin SOT23-5
General Description
The MAX1722/MAX1723/MAX1724 compact, high-effi-
ciency, step-up DC-DC converters are available in tiny, 5-
pin thin SOT23 packages. They feature an extremely low
1.5µA quiescent supply current to ensure the highest pos-
sible light-load efficiency. Optimized for operation from
one to two alkaline or nickel-metal-hydride (NiMH) cells, or
a single Li+ cell, these devices are ideal for applications
where extremely low quiescent current and ultra-small size
are critical.
Built-in synchronous rectification significantly improves
efficiency and reduces size and cost by eliminating the
need for an external Schottky diode. All three devices fea-
ture a 0.5Ω N-channel power switch. The MAX1722/
MAX1724 also feature proprietary noise-reduction circuitry,
which suppresses electromagnetic interference (EMI)
caused by the inductor in many step-up applications. The
family offers different combinations of fixed or adjustable
outputs, shutdown, and EMI reduction (see Selector
Guide).
Pagers
Remote Controls
Remote Wireless
Transmitters
Personal
Medical Devices
Digital Still Cameras
Applications
Single-Cell Battery-
Powered Devices
Low-Power Hand-Held
Instruments
MP3 Players
Personal Digital
Assistants (PDA)
Features
o Up to 90% Efficiency
o No External Diode or FETs Needed
o 1.5µA Quiescent Supply Current
o 0.1µA Logic-Controlled Shutdown
o ±1% Output Voltage Accuracy
o Fixed Output Voltage (MAX1724) or Adjustable
Output Voltage (MAX1722/MAX1723)
o Up to 150mA Output Current
o 0.8V to 5.5V Input Voltage Range
o 0.91V Guaranteed Startup (MAX1722/MAX1724)
o Internal EMI Suppression (MAX1722/MAX1724)
o Thin SOT23-5 Package (1.1mm max Height)
Ordering Information
PART
PIN-
TEMP RANGE _PACKAGE
MAX1722EZK+T+ -40°C to +85°C 5 SOT23
MAX1723EZK+T -40°C to +85°C 5 SOT23
MAX1724EZK27+T -40°C to +85°C 5 SOT5
MAX1724EZK30+T -40°C to +85°C 5 SOT23
MAX1724EZK33+T -40°C to +85°C 5 SOT23
MAX1724EZK50+T -40°C to +85°C 5 SOT23
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
TOP
MARK
ADQF
ADQG
ADQH
ADQI
ADQJ
ADQK
Selector Guide appears at end of data sheet.
Typical Operating Circuit
Pin Configurations
IN
0.8V TO 5.5V
ON
OFF
10µH
BATT
LX
MAX1724
OUT
SHDN
GND
OUT
3.3V AT
UP TO 150mA
TOP VIEW
+
BATT 1
5 LX
MAX1722
GND 2
FB 3
4 OUT
THIN SOT23
Pin Configurations are continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1735; Rev 1; 9/12