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PDF ADP3000AN-33 Data sheet ( Hoja de datos )
| Número de pieza | ADP3000AN-33 | |
| Descripción | Micropower Step-Up/Step-Down Fixed 3.3 V/ 5 V/ 12 V and Adjustable High Frequency Switching Regulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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a
Micropower Step-Up/Step-Down
Fixed 3.3 V, 5 V, 12 V and Adjustable
High Frequency Switching Regulator
ADP3000
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-Pin DIP and SO-8 Package
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 that operates from an input supply voltage of 2 V to
12 V in step-up mode and up to 30 V in step-down mode.
The ADP3000 operates in Pulse Frequency Mode (PFM) and
consumes only 500 µA, making it highly suitable for applica-
tions that require low quiescent current.
The ADP3000 can deliver an output current of 100 mA at
3 V from a 5 V input in step-down configuration and 180 mA at
3.3 V from a 2 V input in step-up configuration.
The auxiliary gain amplifier can be used as a low battery detector,
linear regulator undervoltage lockout or error amplifier.
The ADP3000 operates at 400 kHz switching frequency. This
allows the use of small external components (inductors and
capacitors), making the device very suitable for space constrained
designs.
FUNCTIONAL BLOCK DIAGRAM
SET
A1
VIN
GAIN BLOCK/
ERROR AMP
1.245V
REFERENCE
400kHz
OSCILLATOR
COMPARATOR
DRIVER
R1 R2
ADP3000
GND
SENSE
A0
ILIM
SW1
SW2
VIN
2V–3.2V
100µF
10V
120Ω
6.8µH IN5817
3.3V @
180mA
12
ILIM
VIN
SW1 3
ADP3000-3.3V
FB
(SENSE)
8
GND SW2
54
+ C1
100µF
10V
C1, C2: AVX TPS D107 M010R0100
L1: SUMIDA CD43-6R8
Figure 1. Typical Application
VIN
5V–6V
C1
100µF
10V
RLIM
120Ω
1 23
ILIM VIN SW1
FB 8
ADP3000
GND
5
SW2 4
D1
1N5818
C1, C2: AVX TPS D107 M010R0100
L1: SUMIDA CD43-100
L1
10µH
CL +
100µF
10V
R2
150kΩ
1%
VOUT
3V
100mA
R1
110kΩ
1%
Figure 2. Step-Down Mode Operation
REV. 0
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997
1 page  
100
90
80
70
60
50
40
30
20
10
0
–40
0 25 70
TEMPERATURE – °C (TA)
85
Figure 11. Duty Cycle vs.
Temperature
0.56
0.54
0.52
0.50
0.48
0.46
0.44
0.42
–40
VIN = 3V @ ISW = 0.65A
0 25 70
TEMPERATURE – °C (TA)
85
Figure 12. Saturation Voltage vs.
Temperature in Step-Up Mode
ADP3000
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
–40
VIN = 12V @ ISW = 0.65A
0 25 70
TEMPERATURE – °C (TA)
85
Figure 13. Switch ON Voltage vs.
Temperature in Step-Down Mode
250
200
150
100
50
0
–40
0 25 70
TEMPERATURE – °C (TA)
85
Figure 14. Feedback Bias Current
vs. Temperature
700
VIN = 20V
600
500
400
300
200
100
0
–40
0 25 70
TEMPERATURE – °C (TA)
85
Figure 15. Quiescent Current vs.
Temperature
350
300
250
200
150
100
50
0
–40
0 25 70
TEMPERATURE – °C (TA)
85
Figure 16. Set Pin Bias Current vs.
Temperature
REV. 0
–5–
5 Page 
8-Lead Plastic DIP
(N-8)
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
ADP3000
8-Lead SOIC
(SO-8)
0.430 (10.92)
0.348 (8.84)
85
0.280 (7.11)
0.240 (6.10)
14
0.325 (8.25)
PIN 1
0.060 (1.52)
0.300 (7.62)
0.210 (5.33)
0.015 (0.38)
MAX
0.130
0.160 (4.06)
0.115 (2.93)
(3.30)
MIN
0.022 (0.558) 0.100 0.070 (1.77)
0.014 (0.356) (2.54) 0.045 (1.15)
SEATING
PLANE
BSC
0.195 (4.95)
0.115 (2.93)
0.015 (0.381)
0.008 (0.204)
0.1968 (5.00)
0.1890 (4.80)
8
0.1574 (4.00)
0.1497 (3.80) 1
5
0.2440 (6.20)
4 0.2284 (5.80)
PIN 1
0.0098 (0.25)
0.0040 (0.10)
0.0688 (1.75)
0.0532 (1.35)
0.0196
0.0099
(0.50)
(0.25)
x
45°
SEATING
PLANE
0.0500 0.0192 (0.49)
(1.27) 0.0138 (0.35)
BSC
0.0098 (0.25)
0.0075 (0.19)
8°
0° 0.0500 (1.27)
0.0160 (0.41)
REV. 0
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ADP3000AN-33.PDF ] | |
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