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MC33680FTB 数据表(PDF) 1 Page - ON Semiconductor

部件名 MC33680FTB
功能描述  Dual DC?묭C Regulator for Electronic Organizer
Download  14 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

MC33680FTB 数据表(HTML) 1 Page - ON Semiconductor

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© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 4
1
Publication Order Number:
MC33680/D
MC33680
Dual DC−DC Regulator for
Electronic Organizer
The MC33680 is a dual DC−DC regulator designed for electronic
organizer
applications.
Both
regulators
apply
Pulse−Frequency−Modulation (PFM). The main step−up regulator
output can be externally adjusted from 2.7V to 5V. An internal
synchronous rectifier is used to ensure high efficiency (achieve 87%).
The auxiliary regulator with a built−in power transistor can be
configured to produce a wide range of positive voltage (can be used
for LCD contrast voltage). This voltage can be adjusted from +5V to
+25V by an external potentiometer.
The MC33680 has been designed for battery powered hand−held
products. With the low start−up voltage from 1V and the low quiescent
current (typical 35 μA); the MC33680 is best suited to operate from 1
to 2 AA/ AAA cell. Moreover, supervisory functions such as low
battery detection, CPU Power−Good signal, and back−up battery
control, for lithium battery or supercap are also included in the chip.
FEATURES:
Low Input Voltage, 1V up
Low Quiescent Current in Standby Mode: 35μA typical
PFM and Synchronous Rectification to ensure high efficiency
(87% @60mA Load)
Adjustable Main Output: +2.7V to +5V
nominal 3.3V @ 100mA max, with 1.8V input
Auxiliary Output Voltage: +5V to +25V
+5V @ 25mA max, with 1.8V input
+25V @ 15mA max, with 1.8V input
Current Limit Protection
Power−Good Signal with Programmable Delay
Battery Low Detection
Lithium Battery or Supercap Back−up
32−Pin LQFP Package
APPLICATIONS:
Digital Organizer and Dictionary
Dual Output Power Supply (For MPU, Logic, Memory, LCD)
Handheld Battery Powered Device (1−2 AA/AAA cell)
32−LEAD LQFP
FTB SUFFIX
CASE 873A
PIN CONNECTIONS &
DEVICE MARKING
(Top View)
Device
Package
Shipping
ORDERING INFORMATION
MC33680FTB
LQFP
1250 Tray / Drypack
1
32
LOWBATSEN
NC
DGND
LIBATCL
LOWBATB
PORB
DGND
FTB
LIBATON
VAUXSW
VAUXEMR
LIBATIN
LIBATOUT
NC
VMAINGND
VMAINSW
VMAIN
MC33680
AWLYYWW
MC33680FTBR2
LQFP
1800 / Tape & Reel
http://onsemi.com


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