ADP1109AAN-5 AD [Analog Devices], ADP1109AAN-5 Datasheet

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ADP1109AAN-5

Manufacturer Part Number
ADP1109AAN-5
Description
Micropower Low Cost Fixed 3.3 V, 5 V, 12 V and Adjustable DC-to-DC Converter
Manufacturer
AD [Analog Devices]
Datasheet
a
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.
GENERAL DESCRIPTION
The ADP1109A is a versatile step-up switching regulator. The
device requires only minimal external components to operate as
a complete switching regulator.
The ADP1109A-5 can deliver 100 mA at 5 V from a 3 V input
and the ADP1109A-12 can deliver 60 mA at 12 V from a 5 V
input. The device also features a logic controlled shutdown
capability that, when a logic low is applied, will shut down the
oscillator. The 120 kHz operating frequency allows for the use
of small surface mount components.
The gated oscillator capability eliminates the need for frequency
compensation.
FEATURES
Operates at Supply Voltages 2 V to 9 V
Fixed 3.3 V, 5 V, 12 V and Adjustable Output
Minimum External Components Required
Ground Current: 460 A
Oscillator Frequency: 120 kHz
Logic Shutdown
8-Lead DIP and SO-8 Packages
APPLICATIONS
Cellular Telephones
Single-Cell to 5 V Converters
Laptop and Palmtop Computers
Pagers
Cameras
Battery Backup Supplies
Portable Instruments
Laser Diode Drivers
Hand-Held Inventory Computers
Fixed 3.3 V, 5 V, 12 V and Adjustable
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
REFERENCE
REFERENCE
1.25V
1.25V
GND
GND
V
V
SHUTDOWN/PROGRAM
IN
IN
V
5V
FUNCTIONAL BLOCK DIAGRAM
IN
SENSE
FB
Flash Memory VPP Generator
R2
250k
R1
TYPICAL APPLICATION
A1
A1
COMPARATOR
COMPARATOR
SHUTDOWN
SHUTDOWN
World Wide Web Site: http://www.analog.com
Micropower Low Cost
33 H
L1
1
7
DC-to-DC Converter
V
SHUTDOWN
IN
PGND
ADP1109A-12
4
SW
ADP1109A-3.3: R1 = 152k
ADP1109A-5:
ADP1109A-12: R1 = 29k
3
OSCILLATOR
OSCILLATOR
SENSE
GND
120kHz
120kHz
5
D1
© Analog Devices, Inc., 1997
ADP1109A
8
ADP1109A
R1 = 83k
+
DRIVER
DRIVER
C1
22 F
16V
V
12V
60mA
OUT
PGND
PGND
Q1
Q1
SW
SW

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ADP1109AAN-5 Summary of contents

Page 1

FEATURES Operates at Supply Voltages Fixed 3 and Adjustable Output Minimum External Components Required Ground Current: 460 A Oscillator Frequency: 120 kHz Logic Shutdown 8-Lead DIP and SO-8 Packages ...

Page 2

ADP1109A–SPECIFICATIONS Parameter QUIESCENT CURRENT INPUT VOLTAGE COMPARATOR TRIP POINT VOLTAGE COMPARATOR HYSTERESIS OUTPUT VOLTAGE ADP1109A-3.3 ADP1109A-5 ADP1109A-12 OUTPUT VOLTAGE RIPPLE OSCILLATOR FREQUENCY DUTY CYCLE SWITCH-ON TIME SWITCH SATURATION VOLTAGE ADP1109A-3.3 ADP1109A-5 ADP1109A-12 SWITCH LEAKAGE CURRENT SHUTDOWN PIN HIGH SHUTDOWN PIN ...

Page 3

... Description ADP1109AAN ADJ Plastic DIP ADP1109AAR ADJ Small Outline IC ADP1109AAN-3.3 3.3 V Plastic DIP ADP1109AAR-3.3 3.3 V Small Outline IC ADP1109AAN Plastic DIP ADP1109AAR Small Outline IC ADP1109AAN- Plastic DIP ADP1109AAR- Small Outline IC CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection ...

Page 4

ADP1109A MBRS130T3 3. SENSE IN ADP1109A-12 SHUTDOWN 7 GND PGND 4 5 SHUTDOWN *COILTRONICS CTX20-1 SUMIDA CD54-220LC **AVX TPS SERIES Figure 1. 3.3 V Powered Flash Memory VPP Generator ...

Page 5

TEMPERATURE – C Figure 6. Oscillator Frequency vs. Temperature 0.60 0. AND I = 0.65A CE(SAT 0.50 0.45 0.40 0.35 0.30 ...

Page 6

ADP1109A APPLICATION INFORMATION THEORY OF OPERATION The ADP1109A is a flexible, low power switch-mode power supply (SMPS) controller for step-up dc/dc converter applica- tions. This device uses a gated-oscillator technique to provide very high performance with low quiescent current. For ...

Page 7

In practice, the inductor value is easily selected using the equa- tions above. For example, consider a supply that will generate 120 mA from source. The inductor power re- quired is, from Equation 1: ...

Page 8

ADP1109A 8-Lead Plastic DIP (N-8) 0.430 (10.92) 0.348 (8.84 0.280 (7.11) 0.240 (6.10 0.060 (1.52) PIN 1 0.015 (0.38) 0.210 (5.33) MAX 0.130 (3.30) 0.160 (4.06) MIN 0.115 (2.93) SEATING 0.022 (0.558) 0.100 0.070 (1.77) PLANE ...

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