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參數(shù)資料
| 型號： | MC33680FTBR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Dual DC-DC Regulator for Electronic Organizer |
| 中文描述： | 1.15 A DUAL SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PQFP32 |
| 封裝： | PLASTIC, LQFP-32 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 340K |
| 代理商： | MC33680FTBR2 |
Semiconductor Components Industries, LLC, 2000
May, 2000 – Rev. 3
1
Publication Order Number:
MC33680/D
The MC33680 is a dual DC–DC regulator designed for electronic
organizer
applications.
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
μ
A); 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.
Both
regulators
apply
FEATURES:
Low Input Voltage, 1V up
Low Quiescent Current in Standby Mode: 35
μ
A 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
http://onsemi.com
PIN CONNECTIONS &
DEVICE MARKING
(Top View)
Device
Package
Shipping
ORDERING INFORMATION
MC33680FTB
LQFP
1250 Tray / Drypack
1
32
LOWBATSEN
NC
DGND
LIBATCL
LIBATON
LOWBATB
PORB
DGND
N
V
V
V
V
N
V
V
FTB
V
V
V
V
P
V
A
I
VAUXSW
VAUXEMR
LIBATIN
LIBATOUT
NC
VMAINGND
VMAINSW
VMAIN
MC33680
AWLYYWW
MC33680FTBR2
LQFP
1800 / Tape & Reel
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