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LM3691TL-1.0 Datenblatt(PDF) 1 Page - Texas Instruments

Teilenummer LM3691TL-1.0
Bauteilbeschribung  High-Accuracy, Miniature 1-A Step-Down DC-DC Converter
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Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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LM3691TL-1.0 Datenblatt(HTML) 1 Page - Texas Instruments

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OUTPUT CURRENT (mA)
100
80
60
40
20
0
0.1
1
10
100
1000
VIN = 3.6V
VIN = 2.3V
VIN = 4.2V
LM3691
EN
B2
GND
MODE
A2
VIN
VOUT
COUT
IN
A1
SW
C1
FB
2.3 V to 5.5 V
CIN
C2
B1
Product
Folder
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Technical
Documents
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LM3691
SNVS506J – MAY 2008 – REVISED DECEMBER 2015
LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter
for Portable Applications
1 Features
3 Description
The
LM3691
step-down
DC-DC
converter
is
1
Input Voltage: 2.3 V to 5.5 V
optimized for powering ultra-low-voltage circuits from
Output Voltage: 0.75 V to 3.3 V
a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It
±1% DC Output Voltage Precision
provides up to 1-A load current over an input voltage
range from 2.3 V to 5.5 V. There are several different
4-MHz Switching Frequency
fixed voltage output options available.
64-
μA (typical) Quiescent Current in ECO Mode
The LM3691 has a mode-control pin that allows the
1-A Maximum Load Capability
user to select Forced PWM mode or ECO mode that
Automatic ECO/PWM Mode Switching
changes modes between gated PWM mode and
MODE Pin to Select ECO/Forced PWM Mode
PWM automatically, depending on the load. In ECO
mode, the device offers superior efficiency and very
Current Overload and Thermal Shutdown
low IQ under light load conditions. ECO mode extends
Protections
the battery life through reduction of the quiescent
Only Three Tiny Surface-Mount External
current during light load conditions and system
Components Required (Solution Size Less Than
standby.
15 mm2)
The LM3691 is available in a 6-pin DSBGA package.
Only three external surface-mount components, a
2 Applications
1-
μH inductor, a 4.7-μF input capacitor, and a 4.7-μF
Mobile Phones
output capacitor, are required.
Hand-Held Radios
Device Information(1)
MP3 Players
PART NUMBER
PACKAGE
BODY SIZE (MAX)
Portable Hard Disk Drives
LM3691
DSBGA (6)
1.59 mm × 1.295 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
Efficiency vs. Output Current
(VOUT = 1.8 V, ECO Mode)
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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