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LM3670MF-1.2 датащи(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали LM3670MF-1.2
подробное описание детали  Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
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LM3670MF-1.2 датащи(HTML) 1 Page - National Semiconductor (TI)

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LM3670
Miniature Step-Down DC-DC Converter for Ultra Low
Voltage Circuits
General Description
The LM3670 step-down DC-DC converter is optimized for
powering ultra-low voltage circuits from a single Li-Ion cell or
3 cell NiMH/NiCd batteries. It provides up to 350 mA load
current, over an input voltage range from 2.5V to 5.5V. There
are several different fixed voltage output options available as
well as an adjustable output voltage version (see ordering
information).
The device offers superior features and performance for
mobile phones and similar portable applications with com-
plex power management systems. Automatic intelligent
switching between PWM low-noise and PFM low-current
mode offers improved system control. During full-power op-
eration, a fixed-frequency 1 MHz (typ). PWM mode drives
loads from
∼70 mA to 350 mA max, with up to 95% efficiency.
Hysteretic PFM mode extends the battery life through reduc-
tion of the quiescent current to 15 µA (typ) during light
current loads and system standby. Internal synchronous rec-
tification provides high efficiency (90 to 95% typ. at loads
between 1 mA and 100 mA). In shutdown mode (Enable pin
pulled low) the device turns off and reduces battery con-
sumption to 0.1 µA (typ.).
The LM3670 is available in a SOT23-5 package. A high
switching frequency - 1 MHz (typ) - allows use of tiny
surface-mount components. Only three external surface-
mount components, an inductor and two ceramic capacitors,
are required.
Features
n
V
OUT = Adj (0.7V min), 1.2, 1.5, 1.6, 1.8, 1.875, 2.5,
3.3V
n
2.5V
≤ V
IN
≤ 5.5V
n
15 µA typical quiescent current
n
350 mA maximum load capability
n
1 MHz PWM fixed switching frequency (typ.)
n
Automatic PFM/PWM mode switching
n
Available in fixed output voltages as well as an
adjustable version
n
SOT23-5 package
n
Low drop out operation - 100% duty cycle mode
n
Internal synchronous rectification for high efficiency
n
Internal soft start
n
0.1 µA typical shutdown current
n
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd
batteries
n
Only three tiny surface-mount external components
required (one inductor, two ceramic capacitors)
n
Current overload protection
Applications
n
Mobile phones
n
HandHeld
n
PDAs
n
Palm-top PCs
n
Portable Instruments
n
Battery Powered Devices
Typical Application
20075801
FIGURE 1. Fixed Output Voltage - Typical Application Circuit
January 2006
© 2006 National Semiconductor Corporation
DS200758
www.national.com


Аналогичный номер детали - LM3670MF-1.2

производительномер деталидатащиподробное описание детали
logo
National Semiconductor ...
LM3670MF-1.2 NSC-LM3670MF-1.2 Datasheet
997Kb / 17P
   Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
logo
Texas Instruments
LM3670MF-1.2 TI-LM3670MF-1.2 Datasheet
1Mb / 25P
[Old version datasheet]   LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3670MF-1.2 TI1-LM3670MF-1.2 Datasheet
1Mb / 28P
[Old version datasheet]   Miniature Step-Down DC-DC Converter for Ultralow Voltage Circuits
LM3670MF-1.2/NOPB TI1-LM3670MF-1.2/NOPB Datasheet
1Mb / 25P
[Old version datasheet]   LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
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Аналогичное описание - LM3670MF-1.2

производительномер деталидатащиподробное описание детали
logo
National Semiconductor ...
LM3670 NSC-LM3670 Datasheet
997Kb / 17P
   Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
logo
Texas Instruments
LM3670 TI1-LM3670_14 Datasheet
1Mb / 24P
[Old version datasheet]   Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
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1Mb / 25P
[Old version datasheet]   LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3670MF-18 TI-LM3670MF-18 Datasheet
1Mb / 25P
[Old version datasheet]   LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
LM3670MF-18 TI1-LM3670MF-18 Datasheet
1Mb / 25P
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[Old version datasheet]   3MHz, 600mA Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits
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National Semiconductor ...
LM3677_0810 NSC-LM3677_0810 Datasheet
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LM3677 NSC-LM3677_08 Datasheet
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