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MAX1722 Datasheet

  • MAX1722

  • " 1.5?A IQ, Step-Up DC-DC Converters in Thin SOT23-5"

  • Maxim   Maxim

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19-1735; Rev 0; 7/01
1.5碌A(chǔ) 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
1.5碌A(chǔ) 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 0.5鈩?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).
o
o
o
o
o
o
o
o
o
o
o
Features
Up to 90% Efficiency
No External Diode or FETs Needed
1.5碌A(chǔ) Quiescent Supply Current
0.1碌A(chǔ) Logic-Controlled Shutdown
鹵1% Output Voltage Accuracy
Fixed Output Voltage (MAX1724) or Adjustable
Output Voltage (MAX1722/MAX1723)
Up to 150mA Output Current
0.8V to 5.5V Input Voltage Range
0.91V Guaranteed Startup (MAX1722/MAX1724)
Internal EMI Suppression (MAX1722/MAX1724)
Thin SOT23-5 Package (1.1mm max Height)
MAX1722/MAX1723/MAX1724
Ordering Information
PART
MAX1722EZK-T
MAX1723EZK-T
MAX1724EZK27-T
MAX1724EZK30-T
MAX1724EZK33-T
MAX1724EZK50-T
TEMP. RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
5 SOT23
5 SOT23
5 SOT23
5 SOT23
5 SOT23
5 SOT23
TOP
MARK
ADQF
ADQG
ADQH
ADQI
ADQJ
ADQK
Applications
Pagers
Remote Controls
Remote Wireless
Transmitters
Personal
Medical Devices
Digital Still Cameras
Single-Cell Battery-
Powered Devices
Low-Power Hand-Held
Instruments
MP3 Players
Personal Digital
Assistants (PDA)
Selector Guide
PART
MAX1722EZK
MAX1723EZK
MAX1724EZK27
MAX1724EZK30
OUTPUT (V)
Adjustable
Adjustable
Fixed 2.7
Fixed 3.0
Fixed 3.3
Fixed 5.0
SHDN
No
Yes
Yes
Yes
Yes
Yes
LX
DAMPING
Yes
No
Yes
Yes
Yes
Yes
Typical Operating Circuit
10碌H
IN
0.8V TO 5.5V
MAX1724EZK33
MAX1724EZK50
Pin Configurations
TOP VIEW
LX
BATT
BATT
1
5
LX
MAX1724
OUT
ON
OFF
OUT
SHDN
GND
3.3V AT
UP TO 150mA
GND
2
MAX1722
FB
3
4
OUT
THIN SOT23-5
Pin Configurations are continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

MAX1722 PDF文件相關(guān)型號

MAX1722EZK-T,MAX1723,MAX1723EZK-T,MAX1724,MAX1724EZK27,MAX1724EZK27-T,MAX1724EZK30,MAX1724EZK30-T,MAX1724EZK33,MAX1724EZK33-T,MAX1724EZK50,MAX1724EZK50-T

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