ADP3000AR Analog Devices, ADP3000AR Datasheet

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ADP3000AR

Manufacturer Part Number
ADP3000AR
Description
Manufacturer
Analog Devices
Datasheet

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Part Number:
ADP3000AR-12
Manufacturer:
Analog Devices Inc.
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ADP3000ARU
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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 µA, 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.
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.
Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V,
Adjustable High Frequency Switching Regulator
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
5V TO 6V
2V TO 3.2V
V
IN
V
IN
V
C1, C2 = AVX TPS D107 M010R0100
L1 = SUMIDA CR43-100
REFERENCE
IN
100µF
1.245V
10V
GND
C1
FUNCTIONAL BLOCK DIAGRAMS
100µF
10V
R1
Figure 3. Step-Down Mode Operation
120Ω
R
LIM
SET
I
Figure 2. Typical Application
LIM
© 2004 Analog Devices, Inc. All rights reserved.
ADP3000-3.3V
1
GND
ADP3000
COMPARATOR
GND
I
R2
LIM
A1
1
5
V
2
5
IN
SENSE
120V
GAIN BLOCK/
ERROR AMP
(SENSE)
SW1
SW2
Figure 1.
1N5818
3
SW2
FB
V
OSCILLATOR
2
4
IN
SW1
D1
FB
6.8µH
8
4
400kHz
C1, C2 = AVX TPS D107 M010R0100
L1 = SUMIDA CR43-6R8
3
8
10µH
100µF
L1
IN5817
10V
C
L
+
ADP3000
DRIVER
ADP3000
www.analog.com
+
R2
150kΩ
1%
R1
110kΩ
1%
C1
100µF
10V
3.3V
180mA
A0
I
SW1
SW2
LIM
V
3V
100mA
OUT

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ADP3000AR Summary of contents

Page 1

... 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 ...

Page 2

ADP3000 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configurations and Function Descriptions ........................... 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ........................................................................ 9 Applications Information .............................................................. 10 Component Selection................................................................. 10 Programming the Switching ...

Page 3

SPECIFICATIONS 0°C ≤ T ≤ +70° unless otherwise noted Table 1. Parameter INPUT VOLTAGE SHUT-DOWN QUIESCENT CURRENT COMPARATOR TRIP POINT VOLTAGE OUTPUT SENSE VOLTAGE COMPARATOR HYSTERESIS OUTPUT HYSTERESIS OSCILLATOR FREQUENCY DUTY CYCLE SWITCH-ON TIME ...

Page 4

ADP3000 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Input Supply Voltage, Step-Up Mode Input Supply Voltage, Step-Down Mode SW1 Pin Voltage SW2 Pin Voltage Feedback Pin Voltage (ADP3000) Switch Current Maximum Power Dissipation Operating Temperature Range Storage Temperature Range Lead Temperature ...

Page 5

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS I FB (SENSE LIM ADP3000 V SET TOP VIEW SW1 (Not to Scale) SW2 GND 4 5 *FIXED VERSIONS Figure 4. 8-Lead Plastic DIP (N- ...

Page 6

ADP3000 TYPICAL PERFORMANCE CHARACTERISTICS 2.5 2.0 1 25° 1 0 25° 0.1 0.2 0.4 0.6 0.8 1.0 ...

Page 7

1.6 1 25° 85°C 0.8 A 0.6 0.4 0 100 R (Ω) LIM Figure 15. Maximum Switch Current vs Step-Up Mode (3 ...

Page 8

ADP3000 250 200 150 100 50 0 – TEMPERATURE (°C(T Figure 21. Feedback Bias Current vs. Temperature 700 V = 20V IN 600 500 400 300 200 100 0 – TEMPERATURE (°C(T Figure 22. Quiescent Current ...

Page 9

THEORY OF OPERATION The ADP3000 is a versatile, high frequency, switch mode power supply (SMPS) controller. The regulated output voltage can be greater than the input voltage (in boost or step-up mode) or less than the input voltage (in buck ...

Page 10

ADP3000 APPLICATIONS INFORMATION COMPONENT SELECTION Inductor Selection For most applications, the inductor used with the ADP3000 falls in the range of 4.7 µ µH. Table 4 shows recommended inductors and their vendors. When selecting an inductor for the ...

Page 11

The delay through the current limiting circuit is approximately 0.3 µs. If the switch-on time is reduced to less than 1.7 µs, accuracy of the current trip point is reduced as well. An attempt to program a switch-on time of ...

Page 12

ADP3000 Step-Down ⎡ ⎡ ⎛ ⎞ ⎜ ⎟ = ⎢ + ⎢ ⎜ ⎟ D − SW CESAT ⎢ ⎝ ⎠ ⎢ β ⎣ ⎣ IN where when the ...

Page 13

TYPICAL APPLICATION CIRCUITS L1 6.8µ 3. 120Ω 100µF 10V LIM IN SW1 3 ADP3000-3.3V SENSE 8 GND SW2 SUMIDA CR43-6R8 C1 AVX TPS D107 ...

Page 14

ADP3000 L1 = SUMIDA CR54-150 C1 = AVX TPS D476 M016R0150 C2 = AVX TPS D107 M010R0100 TYPICAL EFFICIENCY = 60% 2.5V TO 4.2V 100kΩ 120Ω 100µ 10V LIM AVX-TPS SET ADP3000 1MΩ GND 90kΩ Figure ...

Page 15

OUTLINE DIMENSIONS 0.375 (9.53) 0.365 (9.27) 0.355 (9.02 0.295 (7.49) 0.285 (7.24) 0.275 (6.98 0.325 (8.26) 0.310 (7.87) 0.100 (2.54) 0.300 (7.62) BSC 0.015 0.180 (0.38) (4.57) MIN MAX 0.150 (3.81) SEATING 0.130 (3.30) PLANE 0.110 ...

Page 16

... ADP3000AN- ADP3000AR Adjustable ADP3000AR-REEL Adjustable ADP3000AR-3.3 3.3 V ADP3000AR-3.3-REEL 3.3 V ADP3000AR ADP3000AR-5-REEL 5 V ADP3000AR- ADP3000AR-12-REEL 12 V ADP3000ARU Adjustable ADP3000ARU-REEL Adjustable © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 5.10 5.00 4. ...

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