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參數資料
| 型號： | ADP3000ARZ-5 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MS-012-AA, SOIC-8 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 235K |
| 代理商： | ADP3000ARZ-5 |
Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V,
Adjustable High Frequency Switching Regulator
ADP3000
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
FEATURES
Operates at supply voltages from 2 V to 30 V
Works in step-up or step-down mode
Very few external components required
High frequency operation up to 400 kHz
Low battery detector on-chip
User-adjustable current limit
Fixed and adjustable output voltage
8-lead PDIP, 8-lead SOIC, and 14-lead TSSOP packages
Small inductors and capacitors
APPLICATIONS
Notebook, palmtop computers
Cellular telephones
Hard disk drives
Portable instruments
Pagers
GENERAL DESCRIPTION
The ADP3000 is a versatile step-up/step-down switching
regulator. It operates from an input supply voltage of 2 V to
12 V in step-up mode, and from 2 V to 30 V in step-down mode.
Operating in pulse frequency mode (PFM), the device consumes
only 500 A, making it ideal for applications requiring low
quiescent current. It delivers an output current of 180 mA at
3.3 V from a 2 V input in step-up mode, and an output current
of 100 mA at 3 V from a 5 V input in step-down mode.
The ADP3000 operates at 400 kHz switching frequency. This
allows the use of small external components (inductors and
capacitors), making it convenient for space-constrained designs.
The auxiliary gain amplifier can be used as a low battery detector,
linear regulator, undervoltage lockout, or error amplifier.
FUNCTIONAL BLOCK DIAGRAMS
COMPARATOR
GAIN BLOCK/
ERROR AMP
400kHz
OSCILLATOR
DRIVER
1.245V
REFERENCE
R1
R2
ADP3000
SET
VIN
GND
SENSE
A0
ILIM
SW1
SW2
A1
00122-001
Figure 1.
ADP3000-3.3V
ILIM
VIN
SW1
FB
(SENSE)
SW2
GND
+
100
F
10V
120V
6.8
H
IN5817
C1
100
F
10V
VIN
2V TO 3.2V
3.3V
180mA
C1, C2 = AVX TPS D107 M010R0100
L1 = SUMIDA CR43-6R8
00122-002
3
2
4
1
5
8
Figure 2. Typical Application
ADP3000
ILIM
VIN SW1
FB
SW2
GND
C1
100
F
10V
RLIM
120
L1
10
H
VIN
5V TO 6V
C1, C2 = AVX TPS D107 M010R0100
L1 = SUMIDA CR43-100
+
D1
1N5818
CL
100
F
10V
R2
150k
1%
R1
110k
1%
VOUT
3V
100mA
00122-
003
3
8
4
5
1
2
Figure 3. Step-Down Mode Operation
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