ADM8828ART Analog Devices Inc, ADM8828ART Datasheet

no-image

ADM8828ART

Manufacturer Part Number
ADM8828ART
Description
Manufacturer
Analog Devices Inc
Datasheet
a
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.
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.
FEATURES
Inverts Input Supply Voltage
99% Voltage Conversion Efficiency
25 mA Output Current
Shutdown Function
Requires Only Two Capacitors
1 F Capacitors
18
+1.5 V to +5.5 V Input Range
600 A Quiescent Current
20 nA Shutdown Current (ADM8828)
APPLICATIONS
Handheld Instruments
LCD Panels
Cellular Phones
PDAs
Remote Data Acquisition
Op Amp Power Supplies
Output Resistance
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
Voltage Inverter with Shutdown
1 F
C1
Figure 1. Typical Circuit Configuration
+
FUNCTIONAL BLOCK DIAGRAMS
CAP–
CAP–
CAP+
CAP–
GND
ADM8828/ADM8829
OUT
OUT
World Wide Web Site: http://www.analog.com
IN
IN
ADM8828/
ADM8829
Switched-Capacitor
NC = NO CONNECT
1
2
3
1
2
3
(Not to Scale)
(Not to Scale)
ADM8828
ADM8829
TOP VIEW
TOP VIEW
SHDN
OUT
+1.5V TO +5.5V
IN
INPUT
6
5
4
6
5
4
© Analog Devices, Inc., 1999
+
CAP+
SHDN
GND
CAP+
NC
GND
C2
1 F
SHUTDOWN
CONTROL
INVERTED
NEGATIVE
OUTPUT

Related parts for ADM8828ART

ADM8828ART Summary of contents

Page 1

... The ADM8828/ADM8829 is available in a 6-lead SOT-23 package. 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 ...

Page 2

... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ORDERING GUIDE Temperature Model Range ADM8828ART – +85 C ADM8829ART – +85 C *RT-6 = 6-lead SOT-23. Min Typ Max 1.5 5 ...

Page 3

Typical Performance Characteristics– 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 1.5 2 2.5 3 3.5 SUPPLY VOLTAGE – V Figure 2. Power Supply Current vs. Voltage 1.5 2 2.5 ...

Page 4

ADM8828/ADM8829 100 EFF EFF 2.0V EFF – mA OUT Figure 8. Power Efficiency ...

Page 5

GENERAL INFORMATION The ADM8828/ADM8829 is a switched capacitor voltage con- verter that can be used to invert the input supply voltage. The voltage conversion task is achieved using a switched capaci- tor technique using two external charge storage capacitors. An ...

Page 6

ADM8828/ADM8829 0.071 (1.80) 0.059 (1.50) 0.051 (1.30) 0.035 (0.90) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 6-Lead SOT-23 (RT-6) 0.122 (3.10) 0.106 (2.70 0.118 (3.00) 0.098 (2.50 PIN 1 0.037 (0.95) BSC 0.075 ...

Related keywords