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LM3673 датащи(PDF) 1 Page - Texas Instruments

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номер детали LM3673
подробное описание детали  2-MHz, 350-mA Step-Down DC-DC Converter
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

LM3673 датащи(HTML) 1 Page - Texas Instruments

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1
2
5
4
3
VIN
SW
FB
EN
GND
L1: 2.2 µH
VOUT
COUT
10 µF
CIN
4.7 µF
LM3673
VIN
2.7 V to 5.5 V
1
2
5
4
3
VIN
SW
FB
EN
GND
L1: 2.2 µH
VOUT
COUT
10 µF
CIN
4.7 µF
LM3673-
ADJ
VIN
2.7 V to 5.5 V
R1
R2
C1
C2
Product
Folder
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LM3673
SNVS434L – JULY 2006 – REVISED OCTOBER 2015
LM3673 2-MHz, 350-mA Step-Down DC-DC Converter
1 Features
3 Description
The
LM3673
step-down
DC-DC
converter
is
1
16-µA Typical Quiescent Current
optimized for powering low voltage circuits from a
350-mA Maximum Load Capability
single Li-Ion cell battery and input voltage rails from
2-MHz PWM Fixed Switching Frequency (Typical)
2.7 V to 5.5 V. It provides up to 350-mA load current
over the entire input voltage range. There are several
Automatic PFM/PWM Mode Switching
different fixed voltage output options available, as
Available in Fixed and Adjustable Output Voltages
well as an adjustable output voltage version ranging
Internal Synchronous Rectification for High
from 1.1 V to 3.3 V.
Efficiency
The device offers superior features and performance
Internal Soft Start
for mobile phones and similar portable systems. The
0.01-µA Typical Shutdown Current
LM3673 uses intelligent automatic switching between
pulse width modulation (PWM) and pulse frequency
Operates From a Single Li-Ion Cell Battery
modulation (PFM) for better efficiency. During PWM
Current Overload and Thermal Shutdown
mode, the device operates at a fixed-frequency of
Protection
2 MHz (typical). Hysteretic PFM mode extends the
Only Three Tiny Surface-Mount External
battery life by reducing the quiescent current to 16 µA
Components Required (One Inductor, Two
(typical) during light load and standby operation.
Ceramic Capacitors)
Internal
synchronous
rectification
provides
high
efficiency during PWM mode operation. In shutdown
mode, the device turns off and reduces battery
2 Applications
consumption to 0.01 µA (typical).
Mobile Phones
The LM3673 is available in a tiny 5-pin DSBGA
PDAs
package. A high switching frequency of 2 MHz
MP3 Players
(typical) allows the use of three tiny surface-mount
W-LAN
components: an inductor and two ceramic capacitors.
Portable Instruments
Device Information(1)
Digital Still Cameras
PART NUMBER
PACKAGE
BODY SIZE (MAX)
Portable Hard Disk Drives
LM3673
DSBGA (5)
1.413 mm × 1.083 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit for ADJ Version
Typical Application Circuit
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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