參數(shù)資料
型號: ADM8828ART
廠商: ANALOG DEVICES INC
元件分類: 穩(wěn)壓器
英文描述: Switched-Capacitor Voltage Inverter with Shutdown
中文描述: SWITCHED CAPACITOR CONVERTER, 190 kHz SWITCHING FREQ-MAX, PDSO6
封裝: SOT-23, 6 PIN
文件頁數(shù): 1/6頁
文件大?。?/td> 67K
代理商: ADM8828ART
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADM8828/ADM8829
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1999
Switched-Capacitor
Voltage Inverter with Shutdown
FUNCTIONAL BLOCK DIAGRAMS
TOP VIEW
(Not to Scale)
OUT
IN
CAP–
CAP+
SHDN
GND
ADM8828
1
2
3
6
5
4
TOP VIEW
(Not to Scale)
OUT
IN
CAP+
NC
GND
ADM8829
1
2
3
6
5
4
CAP–
NC = NO CONNECT
FEATURES
Inverts Input Supply Voltage
99% Voltage Conversion Efficiency
25 mA Output Current
Shutdown Function
Requires Only Two Capacitors
1
m
F Capacitors
18
V
Output Resistance
+1.5 V to +5.5 V Input Range
600
m
A Quiescent Current
20 nA Shutdown Current (ADM8828)
APPLICATIONS
Handheld Instruments
LCD Panels
Cellular Phones
PDAs
Remote Data Acquisition
Op Amp Power Supplies
GENERAL DESCRIPTION
The ADM8828/ADM8829 is a charge-pump voltage inverter
which may be used to generate a negative supply from a positive
input. Input voltages ranging from +1.5 V to +5.5 V can be
inverted into a negative –1.5 V to –5.5 V output supply. This
inverting scheme is ideal for generating a negative rail in single
power-supply systems. Only two small external capacitors are
needed for the charge pump. Output currents up to 25 mA with
greater than 99% efficiency are achievable.
The ADM8828 also features a low power shutdown (SHDN)
pin. This can be used to disable the device and reduce the quies-
cent current to 20 nA.
The ADM8828/ADM8829 is available in a 6-lead SOT-23
package.
+
+
+1.5V TO +5.5V
INPUT
SHUTDOWN
CONTROL
C1
1
m
F
C2
1
m
F
INVERTED
NEGATIVE
OUTPUT
ADM8828/
ADM8829
CAP+
CAP–
GND
IN
SHDN
OUT
Figure 1. Typical Circuit Configuration
相關(guān)PDF資料
PDF描述
ADM8829ART Switched-Capacitor Voltage Inverter with Shutdown
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參數(shù)描述
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